Method and device for diverting transmission in multiple access wireless communication system

FIELD: physics; communications.

SUBSTANCE: description is given of a method and device for switching wireless terminal channels. For this, several communication channels with different physical characteristics are supported in the cell of the base station. Each wireless terminal controls several channels and evaluates several channels at the same time, such that, there can be fast switching between channels. Information on the quality of the channel is sent from each wireless terminal to the base station. The wireless terminal or base station selects the channel, based on the evaluated quality of the channel. By supporting several channels and through periodical changes in channels in different implementation alternatives, the time taken before the wireless terminal finds good or suitable channel conditions is minimised, even if the wireless terminal changes position. Several antennae are used at the base station for simultaneous support of several channels, for example, through control of the directional pattern of the antennae.

EFFECT: reduced delays before wireless terminal finds suitable channel conditions.

66 cl, 26 dwg

 

The technical field to which the invention relates.

The present invention relates to communication systems and, more specifically, to methods and devices for providing explode transmission in the cellular system multiple access.

The level of technology

In the wireless communications system base station located in a stationary location, communicates with multiple wireless terminals, such as mobile nodes that can move within the cell. The specified base station with a single fixed antenna may have a fixed antenna pattern. Consider a single base station, antenna pattern will support varying levels of channel quality between the base station and mobile nodes, depending on the location of the mobile unit relative to the beam. Let's further say that the neighboring base station, with its own antenna pattern can create different noise levels in different locations. The quality of the channel between the base station and mobile node will change as the mobile node moves to different locations within the cell. A mobile node may experience fading, resulting in the deterioration or loss of connection. Certain areas is within a cell can be considered dead zones, where the quality of the channel is too bad for communication. Required methods and devices that reduce the attenuation and dead zones in the cell.

In a system with many mobile nodes usually is great diversity in the set of users, for example, for any given beam will have some users with good channel condition, some users with bad channel conditions and other users with varying levels of channel conditions. At any given time, each mobile node experiences a quasi-static channel conditions. The pilot signals may be broadcasted to the mobile nodes; the quality of the channel of each mobile node can be measured and reported to the base station. Therefore, the base station can schedule the moving parts with good quality channel and delay the planning of mobile nodes with poor quality channel. When this method is used rigorously, the mobile node with the poor quality of a channel, you may have to move to a location with acceptable quality channel to the base station is performed in relation to his plan.

In another approach, the base station may periodically adjust its antenna pattern, again to send pilot signals, coolant is to give messages about the quality of the channel from the mobile node and to plan the moving parts, have the quality of the channel is good. This second approach could lead to a long delay for a mobile node located in a location with poor quality channel, while the directional diagram of the antenna of the base station is not configured to an acceptable level. In addition, this second approach is favorable for one set of mobile nodes due to another set of mobile nodes. Delays in the planning associated with any of these approaches may be unacceptable for certain types of latency-sensitive graph, such as speech. In some cases, if the graph the user has strict restrictions on the delay, the base station may be forced to plan for a user, even when the channel conditions are not favorable, resulting in poor quality of service. Thus, for real-time applications, type of speech, it is often important to minimize the time period between the transmission to the wireless terminal.

When channel conditions are different, practical constraints limit the speed with which conditions a particular channel can be changed without affecting the operation of the communication system. From the position of the wireless terminal, the rapid changes in the communication channel to track difficult. In addition, rapid changes often lead to inaccurate estimates the e channel, used to decode the received signal as the channel conditions could significantly changed since the time was used for measurement of the channel on which to base the estimate of the channel. The use of feedback circuits between the base station and wireless terminal for power control and other purposes limits the speed with which you can change the channels of communication, because changing the conditions of the channel at a speed greater than the speed at which information channel status measured by the wireless terminal and sent back to the base station, may cause the base station will be largely inaccurate information about the state of the channel.

In view of the foregoing, it is obvious that there is a need for improved methods and devices for maintaining a connection in a cell with multiple wireless terminals that can be distributed throughout the cell. There is a need for improved methods of securing a mobile terminal suitable conditions channel to receive information from the base station. From the perspective of planning, it would be preferable if the time interval between periods when the wireless terminal in the cell occurs with good channel conditions, could be minimized, so that the wireless which component is not needed in lengthy delays, after meeting with the appropriate transfer conditions. If you use a deliberate change channel, it is desirable that the speed with which change is introduced into the channel, was less than the rate at which measurement channel perform wireless terminal and/or the speed with which information about the state of the channel is sent back to the base station. It would be desirable if at least some of the new ways were directed to the solution of problems relative to the duration of quasi-static conditions channel mobile node relative to the acceptable delay planning. The methods and devices, which are aimed at reducing the effects of interference from neighboring cells, would also be preferred. Methods that use a diversity of users of the system would also be preferable, but without limitation. Such improved methods could improve the satisfaction of users, to raise the quality of service, increase efficiency and/or increase the performance and throughput.

Disclosure of inventions

The present invention aims to provide methods and devices for reducing delay planning in the communication system. In accordance with the present invention, a base station supports multiple communication channels with different physical the characteristics and each of the communication channels is a subset of the available communication resource. Physical separation of the available link resource in multiple parallel communication channels with different physical characteristics can be performed in a variety of ways, such as frequency, time or code, or some combination. In some embodiment, the communication channels are orthogonal to each other.

Each wireless terminal measures the channel conditions via different communication channels. Each communication channel periodically transmit a pilot signal for measurement of the channel conditions. On the measured channel conditions, you can determine which channel at a specific point in time has the best channel conditions from a position of the wireless terminal. Wireless terminal provides information about the status of channel messages to the base station. This information is used to control the power and speed and/or for the purposes of transmission planning. In some embodiments, implementation, each wireless terminal returns information about the state of the channel, and the base station selects, based on the information about the state of the channel, which channel to use to transmit information to the wireless terminal. The base station will usually choose the channel with the best conditions, for example, the most high is they SNR, of the many channels through which the wireless terminal provides information about the state of the channel. If this is the best channel is not available, the base station may select the next best channel. To reduce the amount of information to be transferred from the wireless terminal to the base station on the basis of repetition, in some embodiments, the implementation of wireless terminals is chosen on the basis of measurements of the channel conditions of multiple channels, which channel should be used to transmit information to wireless terminal at a particular point in time. Wireless terminal according to the channel selection, as part of the feedback information channel supplied by the base station on a periodic basis. In such scenarios, the implementation of feedback transmitted from the wireless terminal to the base station typically includes a channel identifier and information about the quality of the channel, for example, the signal-to-noise ratio (SNR) or signal-to-interference (BSA).

The base station serves many wireless terminals and plural wireless terminals can select the same channel used for the transmission of information within the same time period. In cases where the communication channel selected for use of multiple wireless terminals, the base station takes into account the quality of the channel, reported individual wireless terminals, and gives preference to wireless terminals, reported a higher quality channel to those who report a lower quality channel. Another criterion for the quality of service and/or fairness also take into account, when the base station decides planning, at least in some versions of the implementation. Delay scheduling is reduced compared to systems using a single communication channel, resulting from the use of multiple channels with different physical characteristics, which are reflected in the quality of the channel is reported to the wireless terminal.

In a different implementation, the channels implemented as sharing resources essential communication line and each channel corresponds to a different part of the resource essential lines of communication in terms of time and/or frequency. To avoid the requirement of switching the wireless terminal between multiple carrier frequencies, in some embodiments, the implementation, the carrier frequency used for transmitting signals to a wireless terminal is the same for many different communication channels. In this embodiment, the wireless terminal can switch between channels without the need to change is astate, used for mixing the received signal from the bandwidth of the modulating signal, as part of the demodulation process. This has the advantage of providing rapid switching between channels of communication that allows switching to occur without interfering with the ongoing session Internet Protocol (PI, IP), even when the channel used for the transmission of voice or data packets, change during the ongoing communication session IP.

To enable switching between channels on a quick basis, in some embodiments, the implementation of wireless terminals support the evaluation of the quality of the channel and/or channel estimation for a wide variety of communication channels at the same time. In such scenarios, implementation support, at least two evaluations of the quality of the channel and/or channel estimation at the same time. These two channel estimation are usually estimated for the two best channels to a wireless terminal that is determined by the dimensions of the various channels of the wireless terminal. In the embodiment, support 3, 4 or more channel estimates. Each of the channel estimates is typically independent of other estimates of the channel so that the individual channel properly reflect the specific physical characteristics of the channel to which it corresponds. Evaluation cannobino based on multiple measurements of the channel, that occur at different points in time.

In some embodiments, the implementation uses multiple static communication channels. At least, in one such embodiment, use at least 3 different channel. However, in the cell you can use a larger number of channels with different physical characteristics, for example, 4, 8 or even more.

While the use of multiple static channels with different characteristics provides benefits planning compared to the implementation using a single channel, even greater benefits can be obtained through the introduction of changes in one or more different communication channels.

In some embodiments, implementation, methods of forming a pattern, similar to those disclosed in the application for the grant of a U.S. patent, serial number 09/691766, filed October 18, 2000, and is incorporated into the present description by reference, use separate channels for intentional call changes the channel. Multiple antenna transmitter in this embodiment, is used to facilitate the introduction of changes in the communication channel. This method leads to changes in the channel that can be used situationally-driven scheduler similar to that used in the base station according to the present invention.

By combining situational-driven method of forming a pattern, for example, the introduction of intentional change channel, using multiple parallel communication channels, the delay scheduling can be reduced beyond the advantages of reducing the delay that can be achieved when using only one situational-based beam forming. In fact, in some cases, the delay can be reduced by an amount directly related, if not proportional, with a number of different channels that are supported in the cell to transmit information to wireless terminals. The reduction in delay can be up to a level which would not be possible when using only one channel and beam forming, because the speed at which it can be used in the formation of a pattern to change the channel productive way limited by the speed with which the wireless terminal measures the channel and provides information of the channel quality to the base station.

The use of parallel communication channels with multiple situational-driven beams creates an improved version of explode the transmitting antenna, which can be applied using ka choice is Ala wireless terminal and/or base station on the basis of measurements of the quality of the channel. Each of the parallel channels of communication will usually show different from others is the quality of the wireless channel, thus allowing the scheduler to take advantage explode with a delay, which will share from possible when using a single channel.

In accordance with the present invention, in the case of the introduction of deliberate changes in the communication channel, the speed with which changes channel, usually less than the rate at which the wireless terminal measures the quality of a particular channel change. In addition, the speed with which the wireless terminal provides feedback channel, for example, over a single channel, is usually higher than the speed at which the channels are intentionally change. In such scenarios, the implementation of the frequency shifts of the channel is usually longer, for example, in some cases, at least, twice the speed, with which to measure the quality of a particular channel is performed and reported back to the base station. In such cases, the relatively gradual change in the channel, which is intentionally introduced, should not have a significant impact on the accuracy of channel estimation is supported by the wireless terminal or the information about the channel state, the returned wireless was terminal is to the base station.

To reduce the possibility of repeated periods of interference affecting the same wireless terminal, the speed with which impose change the channel in the channels of adjacent cells manage to keep it different. Thus, base stations of adjacent cells, in some embodiments, implement, impose change the channel at different speeds.

Although the use of multiple transmission elements, for example, multiple antennas at the base station is not essential for the present invention, in many embodiments of the present invention use multiple antennas. In some of these embodiments, the sets of factors management support for processing control signals transmitted from the base station using different antennas. In such scenarios, implementation, different antennas can be used for various communication channels. Alternatively, the same set of antennas may be shared by different channels of communication with the signal processing used for the introduction of changes in the amplitude and/or phase in signals, corresponding to different parallel channels. The antenna pattern corresponding to a specific channel can be changed in some embodiments, implementation, thus shall amend the gain channel in a particular direction. Gain multiple channels can be changed in unison to maintain to the extent possible, uniform differences between channels.

The method and apparatus of the present invention can be used in a wide range of systems, including frequency hopping, time division and/or communication systems based on code division.

Multiple additional features and advantages are disclosed in the following detailed description.

List of figures

Figure 1 is cited as an example of a wireless communication system, carried out in accordance with the invention.

Figure 2 is cited as an example of cell communication system of figure 1, cited as an example of the communication channels and cited as an example of the alarm, in accordance with the present invention.

Figure 3 is cited as an example of a base station suitable for use in the system of figure 1, carried out in accordance with the present invention.

4 is cited as an example of a wireless terminal, suitable for use in the system of figure 1, carried out in accordance with the present invention.

Figure 5 - design cited as an example of parallel lines, using the method of separation of time between the base stations might and wireless terminals, in accordance with the invention.

6 - design cited as an example of parallel lines, using the method of frequency splitting between the base station and the wireless terminal, in accordance with the invention.

Fig.7 - design cited as an example of parallel lines, uses a combination of methods, frequency division/time division, between the base station and the wireless terminal, in accordance with the present invention.

Fig is cited as an example of parallel highways that use frequency division to below as example 5 MHz systems CDMA/OFDM, in accordance with the present invention.

Fig.9 is cited as an example of a parallel highway 1.25 MHz CDMA or OFDM system using time division, in accordance with the present invention.

Figure 10 - diagram cited as an example of a transmitter that uses a parallel line and multiple antennas, in accordance with the present invention.

11 is a graph illustrating the case due to the formation of a pattern for a single beam, in accordance with the present invention.

Fig is a graph illustrating the case due to the formation of the pattern for the two rivademar as an example, rays, in accordance with the present invention.

Fig use two cited as an example of the descending parallel highways (frequency division) and signaling uplink communication, including messages about the quality of the channel (including the choice of a highway through BT), in accordance with the present invention.

Fig - part cited as an example of a wireless communication system, showing a variant embodiment of the invention, adapted for applications in which the channels created using division multiplexing time.

Fig - part cited as an example of a wireless communication system, showing a variant embodiment of the invention, adapted for applications in which the channels are created with the use of multiplexing frequency division.

Fig - alternating line at intermittent time intervals, in accordance with the invention.

Fig - parallel line within the same time intervals, in accordance with the invention.

Fig four parallel line with different transmission characteristics that change over time.

Fig-22 - changes in the radiation patterns of antennas in time, in accordance with the present invention.

Fig which includes a combination of Figa, 23C, 23C is a block diagram cited as an example of how to enable wireless communication system in accordance with the present invention.

Figure 1 presents cited as an example of the wireless communication system 100 implemented in accordance with the present invention. Cited as an example of the wireless communication system 100 includes multiple base stations (BS): base station 1 102, base station M 114. Box 1 104, the wireless coverage area for base station 1 102. BS 1 102 communicates with multiple wireless terminals (BT): BT (1) 106, BT (N) 108 located within cell 1 104. BT (1) 106, BT (N) 108 associated with BS 1 102 over wireless lines 110, 112, respectively. Similarly, the cell M 116 is a wireless coverage area for base station M 114. BS M 114 communicates with multiple wireless terminals (BT): BT (1') 118, BT (N') 120 located within the cell M 116. BT (1') 118, BT (N') 120 associated with BS M 114 wireless lines 122, 124, respectively. BT (106, 108, 118, 120) may be movable and/or stationary wireless device. Mobile BT, sometimes referred to as mobile nodes (PU), can move in the system 100 and can communicate with the base station corresponding to the cell in which they are located. Region 134 is a boundary area in Magdacesti 1 104 and cell M 116.

Network node 126 is connected to the BS 1 102 and BS M 114 network lines 128, 130 links, respectively. Network node 126 is also connected to other network nodes/Internet network line connection 132. Network lines 128, 130, 132 communication can be, for example, fiber-optic communication lines. Network node 126, for example, the node router provides connectivity to BT, for example, BT (1) 106 with other nodes, e.g., other base stations, server nodes AAA nodes, Home agents, peers due, for example, BT (N'), 120, etc. located outside of its cell current location, for example cell 1 104.

Figure 2 shows a drawing of the 200 cell 1 104 illustrate as an example the communication channels and cited as an example of the alarm, in accordance with the present invention. Figure 2 represents the relationship within the cell 1 104 between the BS 1 102 and BT (BT(1) 106, BT(N) 108). BS 1 102 includes multiple transmitting antennas, such as antenna 1 transmitter 202, an antenna 204 N of the transmitter. The base station 502 may perform transmission through multiple antennas 202, 204 on each of BT 106, 108.

In figure 2 these two solid lines (206, 208), one from each of the antennas (202, 204) to BT (1) 106 represent the first line to BT (1) 106. Similarly, the two dotted lines (210, 212), one from each of the antennas (202, 204) to BT (1) 106 represent the second sorcerers who tral to BT (1) 106. Thus, the solid line (206, 208) corresponds to one set of communication signals, which are combined in the air to act as a downward communication channel with BT (1) 106, whereas the dotted line (210, 212) are signals that are combined in the air and work as a second downward communication channel with BT (1) 106.

Similarly, the two solid lines (214, 216), one from each of the antennas (202, 204) to BT (N) 108, represent the first line to BT (N) 108; the two dashed lines (218, 220), one from each of the antennas (202, 204) to BT (N) 108, represent the second line to BT (N) 108. Thus, the solid line (214, 216) corresponds to one set of communication signals, which are combined in the air to act as a downward communication channel with BT (N) 108, whereas the dotted line (218, 220) are signals that are combined in the air and work as a second downward communication channel with BT (N) 108. With the position of each BT 106, 108, they are associated with BS 1 102 two separate lines, from which information can be obtained at any given time. Wireless terminals (106, 108) provide feedback information to the base station 1 102 as shown by arrows (222, 224)emanating from each BT (106, 108), respectively, to the base station 102. The feedback signals to the base station may include information regarding each of these Magistral the th. Based on this feedback information, the BS 102 can determine which line to use and when to transmit data to BT (1) 106 and/or BT (N) 108. In some embodiments, the implementation of each BT (106, 108) sends a signal to the BS 102, specify which routes should be used at any time.

Figure 3 presents cited as an example of the base station 300 implemented in accordance with the present invention. Cited as an example of the BS 300 may be a more detailed representation of any of the BS, the BS 1 102, BS M 114 of figure 1. BS 300 includes a receiver 302, a transmitter 304, a processor, for example, the CPU 306, the interface 308 I / o device 310 I / o and memory 312 associated with each other by bus 314, in which the various elements can interchange data and information. In addition, the base station 300 includes an antenna 216 of the receiver, which is associated with the receiver 302. The base station 300, as shown in Fig. 3, also includes a multiple antenna transmitter (antenna 1 318, antenna 322 n)that are physically separated from each other. Antenna 318, 322 of the transmitter used to transmit information from the BS 300 BT 400 (see Figure 4), while the antenna 216 of the receiver is used to receive information, for example, feedback about the channel conditions, as well as the data, from BT 400.

The memory 312 includes routines 324, and data/information 326. The processor 306 executes the subroutine 324 and uses the data/information 326 stored in memory 312 to control the entire operation of the base station 300 and the implementation of the methods of the present invention. Device 310 I / o, such as displays, printers, keyboards and so on, display system information administrator station and take input commands and/or control of the administrator. The interface 308 I / o connects the base station 300 with the computing network, other network nodes, other base stations 300 and/or the Internet. Thus, through the interface 308 I / o base station 300 can perform the exchange of information about the subscriber and other information, and to synchronize the transmission of signals on BT 400, if this is desirable. In addition, the interface 308 I / o provides high-speed connection to the Internet, allowing users BT 400 to receive and/or transmit information over the Internet through the base station 300. The receiver 302 processes the signals received by the antenna 216 receiver and extracts from the received signal information content included in them. The information retrieved, for example, data and feedback information about the channel conditions, serves on the processor 306 and save o bus 314. The transmitter 304 transmits information, such as data and pilot signals on BT 400 multiple antennas, for example antennas 318, 322. The transmitter 304 includes many modules control the phase/amplitude module 1 316 control the phase/amplitude module 320 n control phase/amplitude. In the presented example in Figure 3, a separate control module phase/amplitude, (316, 320) is associated with each of the transmit antennas (318, 322), respectively. Antenna 318, 322 in SU 300 spaced apart far enough so that the signals from the antennas 318, 322 passed on statistically independent paths, and thus, the channels through which pass the signals will be independent of each other. The distance between the antennas 318, 322 is a function of the angular distribution of BT 400, the transmission frequency, the scattering environment, etc. Generally speaking, separation of half a wavelength between the antennas based on the transmission frequency, is usually sufficient minimum distance separation between antennas, in accordance with the invention. Accordingly, in various embodiments, implementation, antenna 318, 322 spaced half a wavelength or more, and the wavelength is defined carrier frequency fkthe transmitted signal.

Modules 316, 320 control the phase and amplitude perform signal modulation and control the phase and/or amplitude of the signal which will be transmitted to the od of the control processor 306. Modules 316, 320 control phase/amplitude bring changes in the amplitude and/or phase, at least one from a set, for example, two signals transmitted by the BT 400, to thereby create change, for example, the change of amplitude in time, in the composite signal received by BT 400, which information was transmitted from multiple antennas 318, 322. Modules 316, 320 management is also able to change the data rate under the control processor 306, in the functional dependence of the conditions of the channel, in accordance with the present invention. In some embodiments, implementation, modules 316, 320 control phase/amplitude change the phase and/or amplitude by changing the coefficients.

As mentioned above, the CPU 306 controls the operation of the base station 300 under the guidance subroutine 324 stored in the memory 312. Subroutine 324 include routine 328 communication and routine 330 controls the base station. Subroutine 330 controls the base station includes a module 332 scheduler/arbitration transmission and module 334 scheduler/arbitration reception, Data/Information 326 include data 336 transmission and a lot of data/information 338 wireless terminal (BT). Data/information 338 BT include information 340 BT 1 and information 342 BT N. Each set of information BT, for example, information 340 is T 1, includes data 344, information 346 ID of the terminal, information 348 about the state of the channel and the stored information 350 about the subscriber. Stored information 350 about the subscriber includes information 352 about the modulation scheme, information about 354 of the transmitting antenna and the information 356 on the transmission frequency. The data 356 transfer include data such as user data intended for transmission to BT 400 located within the cell of the BS 300. Data 344 includes user data associated with BT 1, for example, data received from the BT 1 and intended for transmission to a peer communications, e.g., BT N, and data received from the peer towards BT 1 node, for example, BT N, intended for direction on BT 1. Information 346 ID terminal includes current identity, the selected base station for BT 1. Information 348 about the state of the channel includes information feedback from BT 1, such as, for example, information evaluation of the descending channel (channels) and/or selected BT 1 downward channel.

Module 332 scheduler/arbitration transfer plans when data will be transferred 336 transmission, for example, detached, BT 400. As part of the planning process, module 332 performs the arbitration of the needs of different BT 400 in obtaining data. Module 334 scheduler/arbitration reception plans, to the GDS BT 400 will be allowed to load data to the BS 300. As the scheduler 332 transmission, the scheduler 334 can execute the arbitration few BT 400 attempting to load data at the same time. In accordance with the present invention, the modules 332, 334 perform operations planning, as a function of the received feedback information about the channel conditions, for example, information 348 about the state of the channel BT 1. Subroutine 328 connection determine the frequency and data rate, as well as the appropriate method of encoding or modulation to be used for communication with each of the BT 400. Subroutine 328 connection can access the stored information about the state of the channel and information about the subscriber, for example, information 344 about the state of the channel BT and stored information 350 about the subscriber BT to obtain relevant information used by the routines 324. For example, subroutine 328 connection can access information 348 about the state of the channel, the received feedback, to determine the appropriate data rate that should be used when communicating with BT 400. In addition, other stored data 350 about the subscriber, such as information 352 about the modulation scheme, information about 354 transmitting antenna and 356 information about the frequency of transmission can be found and used to determine compliance is adequate modulation scheme, the number of transmitting antennas and the transmit frequency to be used for communication with a specific BT 400 planned for more information.

While in some embodiments, the implementation uses a single antenna to transmit information on BT 400, the use of multiple physically separated antennas 318, 332 allows you to send the same information from different locations managed by the differences in phases and/or amplitudes, bring in at least one of the transmitted signals to perform artificial dispersion at the receiving BT 400.

Figure 4 presents cited as an example of a wireless terminal 400 implemented in accordance with the present invention. Cited as an example of the wireless terminal 400 may be a more detailed representation of any of the BT 106, 108, 118, 120 in the example system 100 wireless from Figure 1. BT 400 includes a receiver 402, a transmitter 404, device 406 I / o, CPU, such as CPU, 408, memory 410, connected to each other by a bus 412, in which the various elements can interchange data and information. The receiver 402 is connected with the antenna 414; transmitter 404 is connected with an antenna 416. In some embodiments, implementation, instead of two separate antennas 414 and 416 can be used E. the mysterious dish.

The signals of the downlink transmitted from the BS 300, receive antenna 414 and processed by the receiver 402. The transmitter 404 transmits to the BS 300 signals uplink communication antenna 416. Signals upward communication include information evaluation of the descending channel feedback and/or information identifying the selected downstream channel on which BT 400 requests that should be transmitted to the data downlink, in accordance with the invention. Device 406 I / o include human interface devices, such as microphones, loudspeakers, video cameras, video displays, keyboards, printers, displays data terminal, etc. Device 406 I / o can be used to implement the interface with the operator BT 400, for example, allowing the operator to enter user data, speech and/or video sent to the peer host and allowing the operator to view the user data, speech and/or video, reported from the peer host, for example, another BT 400.

The memory 410 includes routines 418 and data/information 420. The processor 408 performs routine 418 and uses the data/information 420 in the memory 410 to control the main job BT 400 and implementation methods of the present invention. Subroutine 418 include a subroutine 42 communication and routine 424 control of BT. Subroutine 424 management of BT include module 426 of the measuring channel and module 428 channel selection.

Data/Information 420 includes data 430 transmission, the stored information 432 base station and user information 434. User information 434 includes information identifying 436 base station, information 438 ID of the terminal, information 440 on the selected downstream channel, a lot of information measurement channel (442 measurement channel 1, information 446 measurement channel N), the set information of channel estimation (444 assessment of channel 1, the information 448 channel estimation N) and information 450 of the selected channel. Data 430 transfer include user data, such as data/information that will be transmitted to the BS 300, intended for a peer node in a communication session with BT 400, the feedback of the descending channel and/or the selected downstream channel. Stored information 432 base station includes information specific for each base station, for example, the skew value, which can be used in sequences of jump, carrier frequencies used by different base stations, the modulation methods used by different base stations, changes in beam forming, which is avisat from the base station, etc. User information 432 includes information currently used BT 400. Information ID of the base station 436 includes identifying information of the base station in the cell which is currently BT 400, for example, the slope value used in the sequence of the jump. Information 348 ID terminal is a dedicated base station ID that is used for the current identification of the BT 400 BS 300, in which the cell is BT. Information about 440 allocated downlink includes a downward channel allocated to the BS 300 for BT 400, which is expected to transfer user data. Information 442 measurement channel 1 includes a measurement of the received signals corresponding to channel 1, for example, measurement pilot signal transmitted in a top-down channel 1, such as SNR (Signal to Noise), BSA (Signal-to-Interference), etc. Information dimension of the N Channel includes measuring the received signals corresponding to channel N, for example, measurement pilot signal transmitted on the downstream channel N, such as SNR, OSB, etc. Information 444 Channel estimation 1 includes estimates of the descending channel 1, for example, based on information 442 measurement channel 1. Information 448 channel estimation N includes evaluation of the descending channel 2, based in the information 446 measurement channel N. Information 450 of the selected channel includes information identifying which channel BT 400 has been identified as more desirable descending channel, for example, which of the downlink 1, N formed pattern is best suited at present to BT 400. Information 450 of the selected channel can also include measurement information of a channel corresponding to the selected channel.

Subroutine 422 connection controls the transmission and reception of data, the transmitter 404 and receiver 402, respectively. Subroutine 422 communication can change the data rate, in accordance with the present invention, based on the channel conditions. In addition, the subroutine 422 communication takes into account the scheduling information received from the BS 300 for guaranteed data 430 transmission BT 400 at the time, authorized the BS 300. Subroutine 422 communication convey information about the state of the channel, for example, information 442, 446 measurement channel information 450 of the selected channel and/or feedback information about the amplitude/phase on the BS 300 by means of the transmitter 404. Subroutine 422 communications are also responsible for controlling the display and/or audio presentation device 406 I / o received information to the user of the BT.

Module 426 of the measuring channel measures the conditions of the channel floor is tea information 442 measurement channel 1, information 446 measurement channel N. the Module 426 of the measuring channel also processes information 442, 446 measurement channel and receives information 444, 448 channel estimation, respectively. Module 426 of the measuring channel also provides feedback information about the amplitude and/or phase subroutine 422 communication. Module 428 channel selection compares the information of the measurement channel, for example, information 442 measurement channel 1, information 446 dimension of the channel N, choosing which channels are better stores the selection information 450 of the selected channel and provides information about 450 selected channel subroutine 422 communication. Subroutine 422 connection, then sends the information 442, 446 measurement channel information 450 of the selected channel and/or information about the amplitude/phase on the BS 300 by means of the transmitter 404.

Figure 5 presents cited as an example of a variant of implementation of the construction of parallel lines, for example, downlink between the BS 300 and BT 400. In the method of separation of time 5 time divided by the parallel line, each of which can be used for simultaneously transmitting signals in different time interval, but using the same bandwidth. Figure 5 shows a graph 500 of the dependence of the frequency on the vertical axis 502 of time on the horizontal axis 504. Resource essential lines of the ligature, represented by a rectangle 506, divided in time in here as an example, four parallel lines 508, 510, 512, 514. In the method of the separation time, each parallel highways 508, 510, 512, 514 is a full-page 516 bandwidth, but within different time intervals 518, 520, 522, 524.

Figure 6 presents another cited as an example of a variant of implementation of the construction of parallel lines, for example, downlink between the BS 300 and BT 400. In the method of frequency-breaker 6, the bandwidth is divided into parallel line, each of which can be used simultaneously for parallel transmission of signals. Figure 6 shows a graph 600 of the dependence of the frequency on the vertical axis 602 of time on the horizontal axis 604. Resource essential lines of communication, represented by the rectangle 606, is divided in frequency cited as an example of five parallel highways 608, 610, 612, 614, 616. In the method, frequency separation, each parallel line 608, 610, 612, 614, 616 occupies a different frequency band 618, 620, 622, 624, 626, but it takes the entire time interval 628.

Figure 7 presents another variant of implementation of the construction of parallel lines, for example, downlink between the BS 300 and BT 400. In the embodiment, in Fig.7. the above options for the implementation of the management method of the frequency separation (6) and the method of time-division (Figure 5) combined to create parallel lines. Figure 7 shows a graph 700 of the dependence of the frequency on the vertical axis 702 of time on the horizontal axis 704. Resource essential lines of communication, represented by the rectangle 706, divided into 12 parallel highways 708, 710, 712, 714, 716, 718, 720, 722, 724, 726, 728, 730.

On Fig and 9 are presented here as an example of ways to use parallel routes in the example systems, CDMA and OFDM. On Fig presents a parallel line in the example systems using frequency division. On Fig, drawing 850 shows frequency along the horizontal axis 802, corresponding cited as an example of the CDMA system having a strip 804 bandwidth 5 MHz only, which is divided into three bearing 806, 808, 810, each representing a 1.25 MHz line 810, 812, 814. Thus, in the 5 MHz CDMA system has three parallel highway, highway 1 810, line 2 812 and highway 3 814. Drawing 850 is on the horizontal axis 852 frequency corresponding cited as an example of the OFDM system, also has a scroll 854 bandwidth 5 MHz only, which is divided into N colors 853. In this figure, these colours N are grouped into four subsets highway 1 856, line 2 858, line 3 860, line 4 862. Thus, in this 5 MHz OFDM system has four parallel line 856, 858, 860, 862.

Figure 9 shows a graph 900 of the dependence of the frequency on the vertical axis 902 of time on the horizontal axis 904. Cited as an example of MC-CDMA or OFDM presented on Fig.9, has a band 906 bandwidth 1.25 MHz only, which is shared by the two parallel lines 908, 910 method of time-division. In the first time interval 912 (t=t0up to t=t1) use highway 1 908; in the second time interval 914 (t=t1up to t=t2) use highway 2 910; in the third time interval 916 (t=t2up to t=t3) use highway 1 908; in the fourth time interval 918 (t=t3up to t=t4) use highway 2 910.

In various embodiments, implementation of the present invention can change the bandwidth, the number of lines, number of bearing, the number of tones and/or number of subsets. In various embodiments, implementation of the present invention may change the allocation of divisions for each line.

In accordance with the invention BT 400 running module 426 measurement conditions of the channel controls the receiver 402 for measuring the received signals to obtain a quality of each channel of the parallel roads. Measurement information (442, 446) channel (1, N) is obtained from the received signal. Measurements of individual channels multiple parallel master of the lei allow BT 400 to perform the selection line. Information dimension (442, 446) channel (1, N) may include a signal-to-interference (BSA) and the characteristics of the fading. Each parallel line may have its own pilot signal (pilot signal) to facilitate quality measurement channel, and the density of the used pilot signals may depend on the division of resource essential lines of communication.

Then BT 400 reports the measurement results back to the source transmission, the BS 300. In some embodiments, implementation, communication is frequent and/or periodic. In one embodiment, the message about the quality of the channel includes the list of the measurement qualities of the channel in a separate parallel lines, for example, measurement information (442, 446) channel (1, N). In another embodiment, the message about the quality of the channel includes the index of one of the parallel lines, that has the best quality of the channel and the corresponding dimension of the channel quality, for example, information about the selected channel 450.

In accordance with the invention, wireless system, such as system 100, is equipped with multiple antennas 318, 322 of the transmitter at the base station 300, the antenna 318, 322 are used to create different situation-due to the rays for different parallel lines. For purposes of this description, consider the case of two antennas. This is the t same principle can be easily extended to the case of many antennas. Let K denotes the number of parallel lines.

Denote the signal to be transmitted at time t according To the parallel lines, as

(Note: In some places the vectors marked with lines above the symbol, in other places the vectors are indicated by underline and/or bold. These callouts can be used in these materials are interchangeable).

In the example generalized description of the invention, two signals derived from this base signal and transmit it through the two transmitting antennas, respectively. Two of the received signal can be described as

where Ck(t) and dk(t) are, generally speaking, complex time-varying coefficients imposed on the signal by the k-th parallel roads on the first and second transmitting antennas, respectively. In accordance with the invention, the coefficients {C1(t), C2(t),..., ck(t)} and {d1(t), d2(t),..., dk(t)} is independent of the transmitted signal.

Figure 10 shows a diagram 1000 cited as an example of a variant embodiment of the invention using multiple transmitting antennas (1002, 1004), transmitting parallel master of the NML. Figure 10 shows the k parallel lines and two antennas. Component 1006 highway 1, component 1008 highway 2,..., and highway k 1010 correspond to the antenna 1 1002. Component 1012 highway 1, component 1014 highway 2,..., and highway 1016 k correspond to the antenna 2 1004.

The input signal S1(t) 1018 multiplied by multiplier 1020 on complex time-varying coefficient C1(t) 1022, generating component 1006 highway 1; component 1006 highway 1 serves for the input device 1024 Association. The input signal S2(t) 1026 is multiplied by multiplier 1028 on complex time-varying coefficient C2(t) 1030 generating component 1008 highway 2; component 1008 highway 2 served on the input device 1024 Association. The input signal Sk(t) 1032 is multiplied by multiplier 1034 on complex time-varying coefficient Ck(t) 1034 generating component 1010 highway k; component 1010 highway serves 4 to the input device 1024 Association. The input signal S1(t) 1018 multiplied by multiplier 1038 on complex time-varying coefficient d1(t) 1040, generating component 1012 highway 1; component 1012 highway 1 serves for the input device 1042 Association. The input signal S2(t) 1026 is multiplied by multiplier 1044 on complex time-varying adjusted ient d 2(t) 1046 generating component 1014 highway 2; component 1014 highway 2 served on the input device 1042 Association. The input signal Sk(t) 1032 is multiplied by multiplier 1048 on complex time-varying coefficient dk(t) 1050 generating component 1016 highway k; component 1016 highway serves 4 to the input device 1042 Association.

The scheme shown in Figure 10 may be, for example, a part of the transmitter 304 in the base station 300. In the example in Figure 10 device (1024, 1042) combination is used to combine signals from different routes for transmission using the antenna. Each of the devices Association takes signals on parallel highways and processes them to generate the signal to be transmitted over a single physical antenna. The device 1024 Association takes component 1006 highway 1, component 1008 highway 2,..., component 1010 highway k and combines them into a signal S1(t) 1052 passed through the antenna 1 1002. The device 1042 Association takes component 1012 highway 1, component 1014 highway 2,..., component 1016 highway k and combines them into a signal S2(t) 1054, which passes through the antenna 2 1004. In the case of highways, created in the time domain, device, 1024, 1042 associations may be implemented as multiplexers. For m is gastrula frequency domain, device 1024, 1042 Association can be performed as "adders"), as they combine the signals that belong to different frequency ranges.

The invention leads to a gain in spaced transmission implemented in the receiver 402 BT 400. Denote the channel responses from the two antennas to the receiver, as hc(t) and hd(t), respectively. In order to simplify the description, assume that the response of the channel from any antenna 318, 322 (BS 300) to the receiver 402 (BT 400) is constant in frequency. However, this assumption does not restrict the invention. Therefore, the signal received by the receiver 402 (BT 400) is

where the k-th element in the vectoris the received signal at the k-th parallel highway. Therefore, when the invention is applied to a system with two transmitting antennas and multiple parallel lines, complex response of the channel in the k-th parallel line from the transmitter to the receiver is now set to Ck(t)hc(t)+dk(t)hd(t). With a suitable choice of the values of the coefficients {Ck(t)} {dk(t)} in the transmitter 304 (BS 300), at least one line must have a high probability of suitable quality complex channel, while the responses of complex channel other highways may and the et is of poor quality. In any case, the delay experienced by the receiver 402 (BT 400) in anticipation of the time when he experiences the high quality of the channel is significantly reduced, as it can choose between appropriate moments planning on multiple lines.

The idea of situational-driven paradigm of beam forming is that the transmitter 304 (SU 300) chooses the correct values of the coefficients, the receiver 402 (BT 400) independently measures the channel quality of the parallel roads. BT 400 informs the BS 300 (with transmitter 304) measurements, and BS 300 controls the transmitter 304 to send the graph to the receiver 402 to those highways that have a good quality channel. To use the invention, the receiver 402 do not need to explicitly evaluate hc(t) and hd(t).

In one of the embodiments of the present invention, each of the parallel roads has its own situational-driven beam. Figure 11 shows a graph 1100 illustrating the case due to the formation of a pattern for a single beam. Figure 11 shows the dependence of the received SNR on the vertical axis 1102 from the time intervals on the horizontal axis 1104; shows feature only situationally-induced beam 1106 sootvetstvujushej the only parallel to the highway. On Fig shows a graph 1200 illustrating the case due to the formation of the pattern for the two cited as an example of the rays. On Fig presents the dependence of the received SNR, on the vertical axis 1202, from the time intervals on the horizontal axis 1204; situational characteristics-due to beam 1 1206 corresponds to the first parallel line, whereas the situational characteristics-due to beam 2 1208 corresponds to the second parallel line. Complex time-varying weights adjusted so that the rays were effectively shifted from each other. The receiver 402 sees that the quality of the channel varies in time on any particular line. Usually, the receiver 402 perceives high quality channel on one of the highways (and the corresponding rays), while the other line (and the corresponding ray) offers a low quality channel, as shown in Fig. It is easy to see that the use of two beams effectively reduce the delay of the receiver 402 in anticipation of the time when the quality of the channel is high and the receiver 402 may make a choice between beams depending on the quality of their channel. The receiver 402 has the opportunity to choose the strongest of these rotating rays and report on the trunk associated with the selected beam (and the corresponding qualities of the channel) on the transmitter 304), so that the transmitter 304 can send the graph to the receiver 402 highway from the best quality channel.

In the present invention, with lots of rotating beams transmitted on parallel lines, the receiver 402 can see the quality of spaced channel in a short period of time, and therefore the delay in obtaining the good quality of the channel is significantly reduced.

Selection of coefficients {Ck(t), dk(t)} is very flexible. In one embodiment, {Ck(t)} set constant, {dk(t)} set representing a complex number constant amplitude with the phase rotating in time and phase components {dk(t)}, which is uniform in time:

Ck(t)=l

dk(t)=exp(j2πft+Uk), where the phase shifts {Uk} uniformly distributed in [0,2l].

For example, for K=3, U1=0and for K=4, U1=0. This particular implementation has led to numerous situational-driven beams, each of which rotates with a frequency f.

As a special case of option exercise f may be zero, that is situational-rays due to not rotating. In this case, the coefficients can be selected or random way, or with uniformly distributed phases, and can be considered permanent, at least, is for some period of time. This special case is particularly attractive when implemented by a large number of parallel routes (To>2). If you have a large number of parallel lines, it is very likely that at any given time, the receiver 402 can find at least one line that has "quite a formed pattern".

As a generalization of a variant implementation, the coefficients may use different and time-varying amplitude

where {αk(t)} are real numbers.

Generally speaking, the number of formed roads should not be the same as the number of case due to rays that are implemented using multiple antennas. Multiple rays (up to the number of transmitting antennas) can be implemented in the same line, receivers, monitors the signal quality for each of these rays on each of these routes. In fact, different users can then be planned according to different rays in the line. For example, in the case of two beams in the main-line one user can have zero on the first beam and is planned for the second beam. Another user may be in the reverse situation, with zero on the second beam and will be planned on the first beam.

When highway SFD the commands by separating bandwidth full bandwidth of the system is greater than the coherent bandwidth, describes how to select the beam can use the gains from diversity as explode from the transmitting antenna and frequency diversity available in the system without any delay planning.

In a cellular environment, the quality of the channel is determined not only of signal component but also a component of interference. To optimize the quality of the channel, can be used multiple transmitting antennas and a parallel line to the receiver 402 has had quite formed a pattern in their desired cell, such as cell 1104 (situation-due to the formation of the pattern) and at the same time was very zeroed in their neighboring cells, for example, the cell M 116 (situation-due to zero). In one embodiment of the invention, each cell can be independently apply the invention disclosed in the above description, except that the frequency of rotation of the beams f, used in adjacent cells may be different.

On Fig presents the use of two parallel lines, marked as 1 and 2, is formed by means of frequency division system division multiplexed frequency, for example, the OFDM system. Graph 1300 is zavisimost the frequency downlink, on the vertical axis 1302, from time to time on the horizontal axis 1304. The frequency of the downlink sub-divided into highway 1 1306 and highway 2 1308. Each rectangle on the graph 1300 represents a segment of highway downward graph. Drawing 1350 is signaling uplink communication, for example, messages about the quality of the descending channel from the three cited as an example of the BT 400 (BT And BT, BT) on the BS 300, in accordance with the invention.

BT 400 (a, b, C), including their respective receivers 402 (a, b, C), measure and evaluate the quality of each channel of the parallel lines, using pilot signals transmitted by the BS 300 in signaling downlink in these arteries. BT 400 (a, b, C) then report back on the best value quality of the channel and the corresponding index parallel to the highway, in their respective messages, 1352, 1354, 1356 about the quality of the channel. In this example case is due to the formation of the pattern is such that the quality of the channel (BSA)measured by the receiver And for the two routes is 0 dB and 10 dB, BSA measured by the receiver for the two routes is 5 dB and -3 dB, and BSA measured by the receiver for the two routes is 0 dB and -2 dB. Therefore, BT And reports that the line with index 2 has the best quality channel and GSP is 10 dB, BT In reports, h is on the line with index 1 has the best quality channel and GSP is 5 dB, and BT With reports that the line with index 1 has the best quality channel and GSP is 0 dB. Then, the BS 300, which includes a transmitter 304, decides to transmit the segment graph 1312 BT using highway 2 and in parallel to transfer to another segment of the graph 1314 receiver In using highway 1. BS 300 then determines the speed of the coding/modulation and transmit power to be used in these two segments based on the reports of the CPEs from BT a and B. Some time later, BT 400 (a, b and C) again send their messages 1358, 1360, 1362 about the quality of the channel, respectively. This time, BT And reports that the line with index 1 has the best quality channel and GSP is 3 dB, BT In reports that the line with index 1 has the best quality channel and GSP is 10 dB, and BT With reports that the line with index 2 has the best quality channel and GSP is 6 dB. Then the base station 300 decides to transmit the segment graph 1316 on BT In using highway 1, and in parallel to transfer to another segment of the graph 1318 on BT With using line 2.

Line discussed in the present invention, are channels that can be used to transmit information. Various highways, for example, different channels will have a deliberate change the channel. These changes in the channels can is be measured by the wireless terminal 400. Caused channel changes will be reflected in the feedback channel. In a different implementation, the speed with which bring measurable changes of the channel is the same or less than the velocity direction on feedback messages on the channel. Thus, the BS 300 must have accurate information channel that may not be possible if the period of change of the channel is shorter than the period of the feedback messages.

Next will be revealed various features and embodiments of the present invention. On Fig and 15 are presented here as an example base station that can be used to implement the methods disclosed hereinafter. On Fig presents part cited as an example system 1400 communication, comprising cited as an example of a base station (BS) 1402 and two cited as an example of a wireless terminal, BT 1404 and BT 1406. BS 1402 includes cited as an example of the input signal Sm1409, the coefficients 1407, module 1408 management factors, the module 1412 transmitter, multiple antennas (A11416, A21418,..., Ak1420). Module 1408 management factors includes 1410 sets of coefficients for a variety of routes (e.g., for highways 1 to n). Module 1412 transmitter includes k processing is a separate estimate, (1422, 1424,..., 1426), corresponding to k antennas(1416, 1418,..., 1420), respectively. Shows the set of coefficients cited as an example of a line t, where. In the base station 1402, use different sets of coefficients 1410 transmission to generate various routes, for example, in alternating points in time (See. Fig.). For example, at a time when it is desirable to pass on the highway 1, Sm=S1and; at the time when it is desirable to pass on highway 2, Sm=S2and. One cited as an example the line 1403 is shown from the BS 1402 to BT 1404; the second cited as an example the line 1405 is shown from the BS 1402 to BT 1406. Processing elements (1422, 1424, 1426) control coefficients can be, for example, schemes settings of gain and/or phase. An implementation option for Pig well suited for cases in which different channels are constructed using multiplexing separation time, such as CDMA applications.

On Fig part shown here as an example system 1500 communication, comprising cited as an example of a base station (BS) 1502 and two cited as an example of a wireless terminal, BT 1504 and BT 1506. BS 1502 includes input 1508, the coefficients 1510, the module 1512 management factors, the module 1514 transmitter and multiple antennas (e.g., k antennas, A11516, A21518,...,Ak1520). Module 1512 management factors includes sets 1522 coefficients for a variety of routes (e.g., for highways 1 to n). In Fig. 15 presents cited as an example of an implementation option with two highways;

other quantities of highways is also possible, in accordance with the invention. Module 1514 transmitter includes a control line for each line, for example, the module 1524 control highway 1, module 1526 control line 2. Module 1514 transmitter also includes k summing elements(1528, 1530,..., 1532), corresponding to k antennas(1516, 1518,..., 1520), respectively. Each module (1524, 1526) control line includes k processing elements ((1534, 1536,..., 1538 highway 1), (1534', 1536',..., 1538' for line 2)), corresponding to k antennas(1516, 1518,..., 1520), respectively. The set of coefficients for line 1 is. The set of coefficients for line 2 is. Input1508 includes a component 1540 S1and component 1521 S2. Component 1540 input signal S1 is the input signal to the module 1524 control highway 1; component 1524 input signal S2is the input signal to the module 1526 control line 2.

BS 1502, as shown in Fig suitable for transmission with parallel use of multiple routes with different line may correspond to different sets of tones, for example, frequencies. Example Fig particularly well suited for the case when the channel design using multiplexing frequency division, for example, OFDM applications.

On Fig see drawing 1600, representing alternating line a and b (1602, 1604), generated through the use of intermittent sets of coefficients of transmission control, for example, using the transmitter shown in Fig, and changes in the sets of coefficients in time 1606. The difference between the characteristics of the channel, for example, the gain is typically different channels a and B in any two adjacent time intervals is greater than the change in the gain is entered in the channel between successive time intervals used by the particular channel. For example, between channels a and B at any given time to support a large difference, then as a separate channel And varies in time slowly, and separate the first channel varies in time slowly.

On Fig the drawing 1700 representing parallel to line a and b (1702, 1704) in time. Parallel line a and b (1702, 1704) generated by using the first and second sets of coefficients, for example, using the transmitter shown in Fig. In the sets of coefficients changes in time in order to cause changes to the channel. The difference between the characteristics of the channel, for example, the gain is typically different channels a and b, any two parallel channels is greater than the change in the gain is entered in the channel between successive time intervals used by the particular channel. For example, between channels a and B at any given time to support a large difference, then as a separate channel And varies in time slowly, and a separate channel varies in time slowly.

On Fig the drawing of 1800 illustrating four parallel highway (highway And 1802, highway To strip 1804, line 1806, line 1808 D) with different transmission characteristics that change over time, for example, which change through the modification of the coefficients of transmission control at the end of each period of transmission time (ti). Accordingly, shows four periods t11812, t21814, t3 1816 and t41818 transmission and their corresponding endpoints 1813, 1815, 1817 and 1819.

On Fig, 20, 21 and 22 shows the changes in the antenna patterns in time, in accordance with the present invention, which cause through the use of different time ratios of the transmission control for the various routes, for example, parallel or intermittent channels. Although shown only the fixed antenna pattern for each of the presented period of time, it is obvious that the chart can be changed gradually over a period of time, which leads to the chart, changing from the one shown on the same figure it is shown in the following figure at the end of a specific period of time.

On Fig presented here as an example, the base station 1902 and cited as an example of the BT 1904, carried out in accordance with the present invention. On Fig presents the combined antenna pattern includes charts, 1906, 1908, 1910, 1912 antenna corresponding to the channels a, b, C, D, respectively. It should be noted that each petal 1906, 1908, 1910, 1912 corresponds to the radiation pattern of a single channel within the presented period T1 1901 time.

On Fig presented here in is the quality of the example base station 1902 and cited as an example of the BT 1904, carried out in accordance with the present invention. On Fig presents the combined antenna pattern includes charts 2006, 2008, 2010, 2012 antenna corresponding to the channels a, b, C, D, respectively. It should be noted that each petal 2006, 2008, 2010, 2012 corresponds to the radiation pattern of a single channel within the presented period T2 2001 time.

On Fig presented here as an example, the base station 1902 and cited as an example of the BT 1904, carried out in accordance with the present invention. On Fig presents the combined antenna pattern includes charts, 2106, 2108, 2110, 2112 antenna corresponding to the channels a, b, C, D, respectively. It should be noted that each petal 2106, 2108, 2110, 2112 corresponds to the radiation pattern of a single channel within the presented period TK 2101 time.

On Fig presented here as an example, the base station 1902 and cited as an example of the BT 1904, carried out in accordance with the present invention. On Fig presents the combined antenna pattern includes charts 2206, 2208, 2210, 2212 antenna corresponding to the channels a, b, C, D, respectively. It should be noted that each petal 2206, 2208 2210, 2212 corresponds to the radiation pattern of a single channel within the presented period T4 2201 time.

It should be noted that the distinction between directional diagrams are organized to minimize the time that the wireless terminal 1904, for example, a mobile terminal located anywhere in a 360-degree field of transmission, will have to wait before meeting with the channel with optimal or nearly optimal directivity of transmission, that is obvious, will provide good transmission characteristics of the channel from a position of the wireless terminal, for example, a mobile node. As was previously disclosed, BS 1902, in accordance with the invention, includes a scheduler/arbitration transmission (see, for example, a module 332 in Figure 3) and uses the feedback channel for scheduling transmissions to individual wireless terminals.

On Fig, which includes a combination of Fig. 23A, 23C and 23C, presents the block diagram to illustrate in an example method 2300 enable wireless communication system, in accordance with the present invention. The method starts at the initial node 2302 and the process proceeds to step 2304. At step 2304 initialize the first and second base stations and wireless terminals, for example, the moving parts. For cited as an example the devil is Romagnolo node, the process continues with step 2304 to step 2310. For cited as an example, the first base station, the process proceeds to step 2304 via connecting node In 2306 at step 2326. For cited as an example of the second base station, the process proceeds to step 2304 via connecting node 2308 at step 2340.

At step 2310, the first wireless terminal in the first cell is controlled to measure the quality of each of the many different communication channels. The process continues with step 2310 to step 2312. At step 2312, the first wireless terminal control for periodic messages on the measured quality of the channel based on one or more of the various communication channels to the first base station. The process continues at step 2314. At step 2314, the first wireless terminal is controlled to maintain parallel sets of channel estimates and/or assessments of the quality of the channel for use in processing information signals received from the first base station. Channel estimation is typically based on multiple measurements of the channel, which corresponds to a specific assessment. At step 2316, the first wireless terminal control. to select, based on the dimensions of the channel quality, the best of the various communication channels that are perceived by the first wireless terminal. The process continues with step 2316 at step 2318. The stage is 2318, the first wireless terminal is controlled to periodically transmit the feedback signal to the first base station indicating the selected channel to use to transmit information to the first wireless terminal and information about the quality of the selected channel, for example, SNR and/or CPEs selected channel, speed alarm feedback, which is the same as for example 2, the rate at which the first base station changes the transmission characteristics of the signal, or greater speed. At step 2320, the first wireless terminal is controlled to obtain information about the selected channel after the first base station switches from the first channel to the selected channel when transmitting information to the first wireless terminal in response to feedback. The process continues with step 2320 to step 2322. At step 2322, the first wireless terminal is controlled to switch between the first channel and the estimated channel corresponding to the selected channel in response to receiving information about the selected channel. At step 2324, the first wireless terminal control for demodulating the information received on the selected channel through the conversion operation bandwidth in the frequency band of the modulating signal.

At step 2326, the first base station the first cell control for transmitting signals in a variety of communication channels, each separate channel from many different communication channels has a physical characteristic which is detectable first wireless terminal, the pilot signal transmitted on a periodic basis for each channel, information to individual wireless terminals, for example, corresponding to the communication session transmitted in accordance with the plan. Step 2326 includes step 2328. On podate 2328, the first base station is controlled to periodically changes at least one characteristic of a transmission signal of each of the said multiple communication channels, by modifying one or more coefficients used for control signals transmitted using multiple antennas, with the mentioned change occurs at a rate equal to or less than the rate at which feedback information about the channel conditions receive from the wireless terminal. The process proceeds to step 2330. In step 2330, the first base station control for receiving feedback information from a variety of wireless terminals, which referred to the first base station transmits signals, said feedback includes feedback information from the first wireless terminal, said feedback first up the underwater terminal includes information pointing as mentioned in the first wireless terminal of one or more channels and, in some embodiments, the implementation, the channel selected first-mentioned wireless terminal to transmit information on said first wireless terminal; said feedback additionally includes information from the second wireless terminal, the feedback of the second wireless terminal includes information indicating the quality mentioned in the second wireless terminal of one or more channels, and, in some embodiments, the implementation, the channel referred to the second wireless terminal to transmit information on said second wireless terminal. The process continues with step 2330 at step 2332. At step 2332, the first base station is controlled to select between multiple communication channels for use for data transmission to the first and second wireless terminals, referred to the first base station selects the channel for transmission to the first wireless terminal, the channel specified in the received feedback information, as selected first wireless terminal or the channel specified in the feedback information from the first wireless terminal as having the best transmission characteristics mentioned the choice leads to switching between channels, if the selected channel is different from the channel that is currently used for transmission of information to a wireless terminal. Operation proceeds from step 2332 at step 2334. At step 2334, the first base station control for scheduling information transmission on a separate wireless terminal as a function of the channel selected for transmission to individual wireless terminals mentioned scheduling includes assigning priority wireless terminal using the channel, which reported better channel conditions compared to other wireless terminals selected using the same channel. The operation process moves to step 2336; at step 2336 first base station control information for transmission to wireless terminals in a planned time points using the selected channels. From step 2336 process proceeds via connecting node D 2338 at step 2330.

At step 2340, the second base station managing the second cell that is physically adjacent to the first mentioned cell, for transmitting signals according to a variety of different communication channels in the second cell, each individual from a variety of different communication channels in the second cell has a physical characteristic which is detectable first wireless terminal in the second cell, a pilot signal, peredav the text on a periodic basis for each channel, information for individual wireless terminals, for example, corresponding to the communication session transmitted according to plan. Step 2340 includes a step 2342. On podate 2342, the second base station is controlled to periodically changes at least one characteristic of a transmission signal of each of the said multiple communication channels in the second cell, by modifying one or more coefficients used for control signals transmitted using multiple antennas, the mentioned change occurs at a rate equal to or less than the rate at which feedback information about the channel conditions receive from the wireless terminal, the mentioned change, occurs at a rate that differs from the speed with which referred to the first base station periodically changes at least one the characteristic of the signal transmission. The process continues at step 2344. At step 2344, the second base station is controlled to obtain feedback information about the channel conditions from the wireless terminal in the second cell, the choice of channels for transmitting information on said wireless terminal and the scheduling of data transmission. The process continues with step 2344 on stage 2346. On stage, 2346, the second base station control information for transmission on the wire is adnie the terminal in the second cell using the selected channels in the planned time. The process continues with step 2346 on stage 2344.

Various features of the present invention implemented using modules. Such modules may be implemented using software, hardware or combination of software and hardware. Many of the above methods or steps of the methods may be implemented using machine-executable commands, such as software contained in the computer-readable medium such as a memory device, e.g., RAM, floppy disk, etc. for the machine control, for example, the mainframe with optional equipment or without it, to implement all the methods mentioned above or their parts. Accordingly, among other objects, the present invention is directed to providing a computer readable medium containing machine-executable commands to control the machine, e.g., processor and associated hardware, to perform one or more steps of the method described above (methods).

Numerous additional variations of the above described methods and devices of the present invention are obvious to a person skilled in this technical field given the above description of the invention. Such variants are included in the scope of izopet the deposits. The methods and devices of the present invention can be, in various embodiments, implementation and are, used with CDMA, multiplexing orthogonal frequency division (OFDM) and/or various other types of communication technologies that can be used to provide lines for wireless communication between access points and wireless terminals. Accordingly, in some embodiments, the base station establishes communication links with mobile nodes using OFDM and/or CDMA. In various embodiments, the implementation of wireless terminals can be implemented as portable computers, personal data assistants (PDA) or other portable device that includes a receiving/transmitting circuits and logic and/or routines, for implementing the methods of the present invention.

1. A communication method for use in a communication system that includes a first cell including the first base station and at least the first wireless terminal, namely, that uses the first base station for transmitting signals on a wide variety of communication channels, each separate from a variety of different communication channels has a physical characteristic which is detectable first-mentioned wireless those who minal, transmit signals on multiple channels of communication, including periodically changing at least one characteristic of the transmission signal of the first communication channel in said set of communication channels for the introduction of a deliberate change in the above-mentioned first communication channel, which leads to a change in said physical characteristic corresponding to the first communication channel; and

choose one communication channel of the mentioned variety of different communications channels for purposes of transmitting signals mentioned first wireless terminal in response to feedback information received from the first wireless terminal indicating that the communication channel of these many different channels of communication, as it provides the best conditions of the transmission channel to perform transmission to the first wireless terminal at a particular point in time.

2. The communication method according to claim 1, in which the aforementioned various communication channels consist of various parts of a resource essential lines of communication, which is divided into at least one of time and frequency dimension.

3. The communication method according to claim 1, further comprising enabling the first base station to periodically transmit the pilot signal in each of these various communication channels, and transmitting the pilot signal is independent the th from the information signals, transferred to any wireless terminal using various communication channels.

4. The communication method according to claim 1, in which the mentioned physical characteristics of one of these various communication channels, distinct physical characteristics different from the above-mentioned various communication channels.

5. The communication method according to claim 1 in which the said periodic phase changes at least one characteristic of a transmission signal for introducing a deliberate change includes the introduction of at least one of the periodic phase and periodic amplitude changes in said at least one of the different communication channels, with a frequency of at least one change is longer than the interval between feedback about the conditions of the channel received from the first wireless terminal.

6. The communication method according to claim 1, in which said feedback received from the first channel of the wireless terminal includes at least one message about the quality of the channel.

7. The method according to claim 1, further comprising

repeat the above step, and repeating the above step of selecting comprises switching from the pre-selected from the above-mentioned m is Oresta various communication channels to another of these many different communication channels, which has the best channel for the said wireless terminal than said pre-selected from the above-mentioned various communication channels.

8. The communication method according to claim 1, in which the mentioned at least one message about the quality of the channel indicates at least one of the signal-to-noise ratio and the signal-to-interference measured in the above-mentioned first wireless terminal to one of these many different communication channels.

9. The communication method according to claim 6, in which the first wireless terminal transmits messages about the quality of the channel on the base station for a wide variety of communication channels, and the method further includes

enabling the base station to receive the above message about the quality of the channel, the transmitted first-mentioned wireless terminal; and

enabling the base station to select between communication channels for transmission of information on said first wireless terminal as a function of messages about the quality of the channel corresponding to the many different communication channels, and the base station selects the channel that is specified as having the best channel for transmission to the first wireless terminal.

10. The communication method according to claim 6, further comprising

the involvement of b the gas station for scheduling information transmission on multiple wireless terminals for each of the many different communication channels, referred to the planning includes the selection of times of data transmission to different wireless terminals, which must use the same of different communication channels.

11. The communication method according to claim 6, in which said feedback is a signal indicating which of the many different communication channels the first wireless terminal is selected for use to transmit information on said first wireless terminal, the method further includes

enabling the base station to receive a feedback signal from the second wireless terminal indicating which of the many different communication channels chose the second wireless terminal for use to transmit information on said second wireless terminal; and

enabling the base station to control transmission planning at the above-mentioned first and second wireless terminals on the same of these many different communication channels, when the said received feedback signals indicate that the first and second wireless terminals have selected the same communication channel for transmitting information from the base station.

12. The method according to claim 11, in which the base station schedules transmission on the first and second wireless terminals UE is mentioned the same communication channel, as a function of quality information channel provided by the first-mentioned and second wireless terminals.

13. The method according to claim 1, further comprising

enabling the first wireless terminal to perform measurements of the multiple communication channels included in the above-mentioned various communication channels.

14. The method according to item 13, further comprising

enabling the first wireless terminal to select from mentioned multiple communication channels based on the aforementioned measurements and messages mentioned selection of the base station.

15. The method according to 14, further comprising

the involvement of the wireless terminal for transmission of said information feedback, and mentioned feedback indicates the above-mentioned selection of the base station.

16. The method according to clause 15, which referred to the transmitted information feedback includes at least one channel identifier corresponding to the aforementioned selected channel or channels, and information about the quality of the channel, some of the signal received on the said selected channel or channels.

17. The method according to claim 1 in which the said variety of communication channels includes at least three different channel tie is, the three different communication channel includes the aforementioned first communication channel, the second channel and the third communication channel; and

moreover, the above-mentioned step of engaging the first base station for transmitting signals to many different feeds additionally includes

change on a periodic basis, at least one characteristic of a signal of each of the mentioned second and third communication channels.

18. The method according to 17, in which at least one characteristic of a signal of each of the mentioned second and third communication channels includes changing at least one transmission parameter used to control the antenna pattern.

19. The method according to p in which the change in signal characteristics are mentioned first, second and third communication channels perform a synchronized manner to maintain the physical differences between each of the first, second and third communication channels.

20. The method according to p in which the change in signal characteristics are mentioned first, second and third communication channels to perform statistical maximization maximum the signal-to-noise ratio of the first, second and third communication channels of the signal.

21. The method according to claim 1, wherein said communication system additionally includes a second mesh is, includes the second base station and at least a second wireless terminal, and the method includes

engaging the second base station for transmitting signals according to the second variety of communication channels, each separate from the second variety of communication channels has a physical characteristic which is detectable referred to the second wireless terminal, transmitting the second number of different communication channels with periodically changing at least one characteristic of a transmission signal of the second communication channel in said second set of communication channels for the introduction of a deliberate change in the above-mentioned second communication channel, which leads to a change in said physical characteristic corresponding to the second communication channel, modifying at least one characteristic of a transmission signal of the second channel communication performed with the second speed which is different from the first speed at which the first cell change at least one characteristic of the transmission signal of the first communication channel; and

choose one communication channel of the said second set of different communications channels for purposes of transmitting signals on said second wireless terminal in response to feedback information received from the WTO the wow wireless terminal, specifies the communication channel of the above-mentioned second many different channels of communication, as it provides the best conditions of the transmission channel to perform transmission to the second wireless terminal at a particular point in time.

22. The method according to claim 1 in which the said choice in the above-mentioned variety of communication channels includes a switch, and the above-mentioned switching occurs many times during a communication session Internet Protocol conducted by the first-mentioned wireless terminal with another terminal through the first mentioned base station without interrupting the communication session Internet Protocol and without changing the first wireless terminal of its location in the first cell.

23. The method according to claim 1 in which the said choice of these various communication channels includes a switch, and these switches perform many times during the stay of the first wireless terminal in a fixed location in said first cell; and

and use the same carrier frequency for transmitting signals on the many different communication channels, the transmission signal includes mixing the baseband signal with the signal bandwidth, having referred to the carrier frequency to transmit the above-mentioned signals mentioned the mu variety of communication channels.

24. The method according to claim 1, in which the mentioned first communication channel includes the first amplifier and the first antenna; and

and changing at least one characteristic of a signal of the first communication channel includes a gain modification, provide first-mentioned amplifier signal, transmitted through the first mentioned channel.

25. The method according to paragraph 24, in which the said variety of communication channels includes a second channel, the second channel includes a second amplifier and the second antenna; and the method further includes

periodically changing at least one characteristic of a signal of the second communication channel by periodically changing the gain provided by the mentioned second amplifier signal, transmitted through the mentioned second communication channel.

26. The method according to paragraph 24, in which the amplification provided by the first and second amplifiers change by changing the ratio control is used to control the gain provided by the mentioned first and second amplifiers.

27. The method according to claim 1, in which the mentioned first communication channel includes a first control module phase and the first antenna;

and changing at least one characteristic of a signal of the first communication channel includes ass is istovaya first module phase control for phase change signal, passed on the said first communication channel;

moreover, the aforementioned variety of communication channels includes a second channel, the second channel includes a second control phase and the second antenna; and the method further includes

periodically changing at least one characteristic of a signal of the second communication channel through periodic activation of the second control module phase to phase change of the signal transmitted on the said second communication channel;

and moreover first-mentioned and second management modules phase control by means of the coefficients, which periodically change to induce the first and second control phase to perform the above-mentioned phase change.

28. The method according to claim 1, wherein the base station includes multiple antennas, in which the base station transmits the above-mentioned signals on many different channels of communication, and mentioned many of the channels includes a second communication channel in addition to the above-mentioned first communication channel, the first channel has a gain in the first direction, the second channel has a second gain factor in said first direction, and the method further includes

maintenance is Alicia in gain in the first direction between the first and second channels when changing values in the set of coefficients control, corresponding to the aforementioned first communication channel, and the set of coefficients of the control corresponding to the aforementioned second channel, change the values in the set of coefficients of the control leads to a change in gain of the first and second channels in said first direction.

29. The base station includes means for transmitting signals in a variety of communication channels, each separate from a variety of different communication channels has a physical characteristic which is detectable mentioned first wireless terminal;

the control module for periodically changing at least one characteristic of a transmission signal of the first communication channel in said set of communication channels for the introduction of a deliberate change in the above-mentioned first communication channel, which leads to a change in said physical characteristic corresponding to the first communication channel; and

means for selecting one communication channel of the mentioned variety of different communications channels for purposes of transmitting signals on said first wireless terminal in response to feedback information received from the first wireless terminal indicating that the communication channel of these many different channels of communication, as it provides the best usloviiye to perform transmission to the first wireless terminal at a particular point in time.

30. The base station according to clause 29, further comprising

means for scheduling information transmission on multiple wireless terminals for each of the many different communication channels referred to the planning includes the selection of the time of information transmission on different wireless terminals, which must use the same of different communication channels.

31. The base station according to item 30, additionally comprising multiple antennas, each of these many different communication channels includes at least two antennas;

moreover, the above-mentioned control module for periodically changing at least one characteristic of a transmission signal that includes the generator coefficients to generate sets of coefficients used to control the transmission characteristics of various communication channels in said multiple communication channels mentioned factors manage the processing of signals which are transmitted over different communication channels.

32. A communication method for use in a communication system that includes a first cell including the first base station and at least the first wireless terminal, the method includes

engaging the first base station DL the transmission of signals via a variety of communication channels, moreover, the aforementioned variety of communication channels includes at least three different communication channel, referred to three different channels include a first channel, second channel and third channel, each separate from a variety of different communication channels has a physical characteristic which is detectable mentioned first wireless terminal; and

choice one communications channel of the mentioned variety of different communications channels for purposes of transmitting signals on said first wireless terminal in response to feedback information received from the first wireless terminal indicating that the communication channel of these many different channels of communication, as it provides the best conditions of the transmission channel to perform transmission to the first wireless terminal at a particular point in time; and

change on a periodic basis, at least one characteristic of a signal of each of the said second and third communication channels.

33. The method according to p in which changes at least one characteristic of a signal of each of the said second and third communication channels includes changing at least one transmission parameter used to control the antenna pattern.

34. The way is about p, which signal characteristics are mentioned first, second and third communication channels perform a synchronized manner to maintain the physical differences between each of the first, second and third communication channels.

35. The method according to p, in which the transmission signals for each of the many different channels of communication involves the transfer of various information signals for each of the first, second and third communication channels on different wireless terminals, and various information signals transmit at the same time using different tones of the signal, but the same carrier frequency.

36. The method of activating a wireless terminal in a communication system in which a base station transmits information using a variety of communication channels, each communication channel has at least one different physical characteristic and at least one different physical characteristic of one of the communication channels, deliberately changing the base station in time, the method of activating a wireless terminal includes measurements of the channel quality of each of the communication channels;

maintaining the quality of the channel for at least two of these communication channels at the same time; and

the message is information feedback about the quality of the channel on said base station, indicates which of these many different communication channels has the best quality for use in transmitting signals on said wireless terminal.

37. The method according to p additionally includes

enabling a wireless terminal to select which of these many channels of communication must be used to transmit information on said wireless terminal, as a function of measurements of the quality of the channel; and

moreover, such information feedback about the quality of the channel includes a channel identifier identifying the selected communication channel.

38. The method according to clause 37, in which the mentioned feedback about the quality of the channel additionally includes at least some indication of the quality of the selected communication channel.

39. The method according to 38, in which is mentioned in at least some indication of the quality of the selected communication channel includes at least one of information of the relationship of signal to noise and information of the relationship of signal to noise.

40. The method according to 39, in which maintaining quality assessment of the channel for at least two of these communication channels at the same time includes

maintaining quality assessment of the first channel for the first communication channel, which cited UTY wireless terminal reports that has a good quality channel in said feedback information about the quality of the channel; and

maintaining quality assessment of the second channel for the second communication channel that the wireless terminal does not report that has good quality channel, in the above-mentioned feedback information about the quality of the channel.

41. The method according to p, in which maintaining quality assessment of the channel for at least two of these communication channels at the same time includes

maintaining a first channel for the first communication channel;

maintaining evaluation of the second channel for the second communication channel that is different from the aforementioned first communication channel, the method further includes

switching between using the estimates of the first and second channels in response to the first switch of the base station between the first-mentioned and second channels in response to feedback indicating a change in said first and second channels, the said change corresponds to the change, deliberately introduced in the above-mentioned first and second channels of the base station.

42. The method according to paragraph 41, in which the information received from the mentioned first and second channels modulate using the same carrier frequency, and the method further includes ina

the operation demodulation on signals received in said first and second communication channels, without changing the carrier frequency used in the above-mentioned process of demodulation of the signal format of the bandwidth in the format of the modulating signal.

43. Wireless terminal for use in a communication system in which a base station transmits information using a variety of communication channels, each communication channel has at least one different physical characteristic of at least one different physical characteristic of one of the communication channels, deliberately changing the base station in time, the wireless terminal includes

means for measuring the channel quality of each of the communication channels;

the memory containing the assessment of the quality of the channel for at least two of these communication channels at the same time; and

means for communication of feedback information about the quality of the channel on said base station indicating which of the mentioned variety of communication channels has the best quality for use in transmitting signals on said wireless terminal.

44. Wireless terminal according to item 43, additionally comprising

means for selecting which of the mentioned m is Oresta communication channels should be used to transmit information on said wireless terminal, as a function of measurements of the quality of the channel; and

moreover, such information feedback about the quality of the channel, to inform the said means for message includes a channel identifier identifying the selected communication channel.

45. Wireless terminal according to item 44, further comprising

means for maintaining the first channel for the first communication channel;

means for maintaining the estimation of the second channel for the second communication channel that is different from the aforementioned first communication channel; and

means for switching between using the estimated first and second channel in response to the first switch of the base station between the first-mentioned and second channels in response to feedback indicating a change in said first and second channels, the said change corresponds to the change, deliberately introduced in the above-mentioned first and second channels of the base station.

46. A transfer method for use in a device containing multiple antennas, including

processing the first signal as a function of at least one coefficient in the first set of coefficients of the transmission control corresponding to the first channel, to generate the first processed signal with the first piticescu the characteristic signal;

transmitting the first processed signal from at least one of the said multiple antennas;

transmitting at least one signal corresponding to the first signal, simultaneously with the transmission referred to the first processed signal from the other of the said multiple antennas;

processing the second signal as a function of at least one coefficient in the second set of coefficients of the transmission control corresponding to the second channel to generate a second processed signal, referred to the second processed signal has a second physical characteristic of the signal introduced to the mentioned processing, which is different from the first mentioned physical characteristics of the signal;

transmitting the second processed signal from at least one of the said multiple antennas;

transmitting at least one signal corresponding to the second signal simultaneously with the transmission referred to the second processed signal from the other of the said multiple antennas;

receiving feedback information about the channel conditions of the wireless terminal from the first speed; and

scheduling transmission of signals on said first wireless terminal as a function of said information reverse the th communication about the conditions of the channel.

47. The method according to item 46, further comprising

modifying at least one coefficient in said first set of coefficients of the transmission control amount, sufficient to invoke changes in the above-mentioned feedback information, at a speed less than said first speed, or equal to it.

48. The method according to p additionally includes

modifying at least one coefficient in said second set of coefficient transmission control amount, sufficient to invoke changes in said feedback information.

49. The method according to p, in which the said modifying at least one coefficient in said first set of coefficients of the transmission control performed at a speed lower than said first speed, or its equivalent; and

moreover, the above-mentioned modifying at least one coefficient in said second set of coefficients of the transmission control performed at a speed lower than said first speed, or equal to it.

50. The method according to item 46, in which the modifying at least one coefficient in said first set of transmission ratios causes at least one of changing the phase and gain of the signals transmitted using the receiving of the first channel, moreover, the gain change causes a change in amplitude in the transmitted signal.

51. The method according to item 50, in which the gain change introduced in the first channel in the first period of time corresponding to the time between receiving feedback information about the channel conditions of said wireless terminal is less than the difference of the gain between the first and second channels during the first time interval.

52. The method according to item 46, in which the aforementioned first and second processed signals transmit at the same time.

53. The method according to item 46, in which the aforementioned first and second processed signals passed into non-overlapping periods of time, which is repeated on a periodic basis.

54. A transfer method for use with a base station with multiple antennas, which are used for transmitting signals to multiple wireless terminals, the method comprising

maintaining multiple channels between the base station and at least one of these wireless terminals, the said channels have different transmission characteristics;

maintaining for each channel set of the coefficients of transmission control, comprising at least one coefficient transmission control, use isoamyl for management at least one of the above-mentioned various characteristics of the transmission;

receiving feedback information about the channel conditions from at least one wireless terminal at a first speed;

change in time to the second speed, the contents of each set of coefficients of transmission control for a call to change the transmission signals transmitted using each of the supported channels, and

scheduling transmissions to individual wireless terminals using the mentioned channels, as a function of the received information about the state of the channel.

55. The method according to item 54, in which the above-mentioned second speed is less than the first speed, or equal to it.

56. The method according to item 54, wherein each channel has a different transfer function of the channel, and the difference in the transfer function of the channel leads to measurable on said wireless terminal to a different channel.

57. The method according to item 54, in which each channel includes multiple transmit antennas, each transmit antenna transmits a signal having the same information as the signals transmitted from the other mentioned multiple transmitting antennas corresponding to the same channel, but which was subjected to various processing transmission to transmission, as a function of, hence, is her least one of these factors transmission control.

58. The method according to item 54, which referred to different transmission characteristics include at least one of the characteristics of the gain and phase characteristics, these different forms, which are different in size, which can be measured mentioned wireless terminal of another of the said transmission channels.

59. The method according to 58, in which the transmission planning involves choosing for a wireless terminal, which should be directed transmission, the best of these multiple channels on which to transmit a signal intended for transmission.

60. The method according to item 54, in which the said multiple channels includes a first channel and a second channel, the first channel has a gain in the first direction, the second channel has a second gain factor in said first direction, and the method further includes

maintaining differences in gain in the first direction between the first and second channels when changing sets of coefficients of the control corresponding to the aforementioned first and second channels.

61. The method according to p, in which the values of the coefficients of the control corresponding to the first and second channels, selected to maximize directional RA is the availability of gain between the said first and second channels.

62. The method according to item 46, in which the coefficients in the first set of coefficients of the transmission control change intervals greater than 35 MS.

63. The method according to item 46, in which the coefficients in the first set of coefficients of the transmission control change at a speed that is at least half the first speed, thus allowing you to get two messages about the quality of the channel of said wireless terminal for each time change the first set of coefficients.

64. The method according to item 46, in which at least one of the coefficients of the transmission control is a complex value.

65. The method according to item 46, in which at least one of the coefficients of the transmission control is a value used to control the gain of the signal amplifier.

66. The base station includes

multiple antennas;

means for processing the first signal as a function of at least one coefficient in the first set of coefficients of the transmission control corresponding to the first channel to generate a first processed signal having a first characteristic signal;

means for transmitting the first processed signal using at least one of the mentioned set is different antennas;

means for transmitting at least one signal corresponding to the first signal, simultaneously with the transmission referred to the first processed signal from the other of the said multiple antennas;

means for processing the second signal as a function of at least one coefficient in the second set of coefficients of the transmission control corresponding to the second channel to generate a second processed signal and the second processed signal has the characteristic of the signal introduced by the aforementioned processing, which is different from the aforementioned first signal;

means for transmitting the second processed signal from at least one of the said multiple antennas;

means for transmitting at least one signal corresponding to the second signal simultaneously with the transmission referred to the first processed signal from the other of the said multiple antennas;

a receiver for receiving feedback information about the channel conditions of the wireless terminal at a first speed;

the means of transmission control to change at least one coefficient in said first set of coefficients of the transmission control, by an amount sufficient to invoke changes in providing what Uta feedback information, at speeds less than said first speed, or equal to it; and a scheduler for scheduling the transmission of signals to wireless terminals as a function of said feedback information about the channel conditions.



 

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