Method and system to change the power distribution of the direct channel traffic during the soft transfer service

 

System and method for regulating the power distribution of the direct channel traffic in a communication system in which the quality of the signal channels, the pilot signal is accordingly transmitted by multiple base stations contained in the active set of the mobile station measured by the mobile station is compared with the standard signal and the comparison results are communicated to the system controller, so as to show which of the pilot signal in the mobile station exceeds the standard. The system controller then adjusts the power distribution of the direct channel based on the comparison results. The technical result consists in creating a new way to reduce the total power of the forward link traffic transmitted to the mobile station during the soft transmission maintenance and system for its implementation 3 C. and 39 C.p. f-crystals, 14 ill.

The invention relates to cellular communication systems, and more particularly to methods and apparatus for changing the power distribution of the direct channel traffic in the cellular system multiple access code division multiplexing mdcr.

The level of technology In the cellular system mdcr total bandwidth h is the one typically used for transmission to the mobile station from a group of base stations. In other cases, a common set of frequency bands may be used for ties. The main advantage of the transmission of multiple messages in a shared frequency band is to increase the throughput of the cellular telephone system. The standard IS-95, adopted by the Association industry Communication (TIA), is an example of the most efficient radio interface mdcr, which can be used to make system cellular telephone.

Group of messages held in the same band of frequencies in the cellular systems mdcr, separated and distinguished from one another by means of modulation and demodulation of transmitted data using codes pseudo-random noise (PN), known as the receiving and transmitting systems. Other messages are presented in the form of background noise during the processing of any particular message. Because other messages are presented as background noise, protocols mdcr, such as IS-95, is often used deep regulation of power transmission for more efficient use of available bandwidth. Controlling transmit power supports the transmit power of each message near the minimum needed in order to successfully OSM reduce background noise, created other messages.

Another advantage of the transmission from base stations to mobile in the same frequency band and transmission of the mobile stations to the base station in the second frequency band is that it can be used "soft transfer" to switch the mobile station from the service area of the first base station in the service area of the second base station. Soft transfer is a process of simultaneous connection of a mobile station with two or more base stations. Soft transfer service can be contrasted with the hard transfer service, during which the connection with the first base station is interrupted before the connection is established with the second base station.

As you might expect, soft transfer service in General more reliable than a hard transfer service, because at least one connection is maintained at all times. Methods and systems for carrying out soft transfer service in the system of the cellular telephone mdcr described in the patent US 5101101, entitled "Method and system for providing a soft transmission service and communication in the cellular telephone system the Meme cellular mdcr.

In accordance with the procedure padded transfer service described in the aforementioned patents, each base station transmits the corresponding channel pilot signal that is used by mobile stations to obtain initial system synchronization and sustainable pairing time, frequency and phase tracking signals transmitted from cell to cell. The pilot channel signal transmitted from each base station uses a common code extends (i.e., pseudotumour sequence), but uses a different offset phase code, the mobile station can distinguish the channels of the pilot signal transmitted by the relevant base stations.

During the soft transfer of two or more base stations transmit the same data downlink channel to the mobile station. The mobile station receives these signals from a group of base stations and combines them. Method and device for performing this integration is described in the patent US 5109390, entitled "Receiver with diversity in the cellular telephone system mdcr", he describes a way of combining, when you explode for use in the system of the cellular telephone mdcr.

Although soft transfer of obespechivayuschie on the overall system throughput cellular telephone mdcr. This is because many of the direct transmission channel, generated during the soft transfer service, can increase the total transmit power used for making the relevant links. This increased the transmit power increases the overall background noise created by the system that, in turn, may reduce the overall throughput of the system.

Improving soft transfer of system throughput, or reduce, usually depends on the conditions in which the mobile station during the soft transfer service. If the mobile station is in terms of fading, increased diversity, provide a soft transfer service in General is beneficial for system performance, because the signals in General fade independently. However, if the mobile station is in the absence of fading, the diversity of data source is usually redundant. Therefore, the absence of fading advantage of the increased diversity of the source signal, usually does not justify the total increase of transmission power caused by a soft transfer.

Thus, the present invention is directed to at the th transmission service with multiple carrier frequencies, and depending on the context in which communication occurs.

Summary of the invention Accordingly, one objective of this invention is to develop a new method to reduce the total power of the forward link traffic transmitted to the mobile station during the soft transfer service.

Another objective of this invention is to develop a system that carries out the aforementioned method.

Another objective of this invention is to determine the conditions in which the mobile station during the soft transmission maintenance, and optimization configuration soft transmission service in response to this definition.

The invention is equally applicable to a straight line with multiple carrier frequencies.

Accordingly, one objective of this invention is to develop a new way to reduce the total power of the forward link traffic transmitted to mobile station direct communication line with multiple carrier frequencies.

Another objective of this invention is to develop a system that carries out the aforementioned method.

Another objective of this invention is to determine the conditions in which the mobile station operates and optimization conie applicable to systems which is used as a soft transfer and direct line of communication with multiple carrier frequencies.

The present invention provides a new method and system in which the mobile station is often sends the message bit-vector to the system controller, showing quantitatively measured quality of the signal (e.g., signal-to-noise ratio) of the pilot signal from each base station in the active set of channels, the pilot signal being tracked by the mobile station. The mobile station generates a message bit-vector by monitoring the quality of the respective pilot signals, compare the quality of the respective channels, the pilot signal with the standard, and send the message bit-vector to the corresponding base stations in the active set of the mobile station, which then sends the information contained in the message bit-vector to the system controller. In response, the system controller issues a command to the base stations in the active set of the mobile station, adjusting the selected capacity of the respective capacities of the code channels of the base stations in accordance with the qualities of the respective channels, the pilot signal reported in the message bit-vector generating system is new stations, located in the active set of the mobile station, reducing the transmission power of the respective code channels reduces the transmission power of forward link traffic. Accordingly, the total bandwidth of communication systems mdcr increases in the minimum power required for forward link traffic needed for reliable reception in the mobile station. By a quick transfer to the system controller quality of the observed channels, pilot signal system mdcr able to quickly re-optimize system resources in response to changes in external conditions in order to maximize the throughput of the communication system.

In an alternative example embodiment of the invention, which uses a communication line with multiple carrier frequencies, the mobile station sends bits for each carrier frequency, or bit for each antenna. Additionally, the base station adjusts the power of each carrier frequency independently.

A brief description of the drawings a More complete appreciation of this invention and its many attendant advantages will be readily obtained, when it will be better understood with reference to the subsequent detailed description considered in conjunction with the accompanying drawings, Eniem; Fig.2 is a graph of the quality of the pilot channel signal in a time-dependent, and the graph shows the area of soft transfer service; Fig.3 is a block diagram of the mobile station; Fig.4 is a graph showing the typical probability of error rate in frames depending on Eb/No for different number of transmission base stations, which are received by the receiver with diversity with N directions; Fig. 5A is a graph showing the EU/O depending on the time in the soft transfer service for three typical pilot signals; Fig. 5B is a graph similar to the graph shown in Fig.5A, with the addition of a threshold signalr, which is formed below the highest level of the pilot signal;
Fig. 6A is a diagram of the first data structure for a message bit-vector indicating the quality of the pilot channel signal;
Fig. 6B is a diagram of a second data structure for the message bit-vector indicating the quality of the pilot channel signal;
Fig. 6C is a diagram of a third data structure for a message bit-vector indicating the quality of the pilot channel signal;
Fig. 7 is a block diagram of a sequence of messages to reduce the total power of the forward link traffic transmitted from base stations that are the spine of messages to reduce the total power of the forward link traffic transmitted from base stations in the active set when transmitted excess capacity;
Fig.9 is a diagram of a direct communication line with multiple carrier frequencies;
Fig. 10 is a block diagram of the transmitter direct lines of communication with the set of carrier frequencies; and
Fig. 11 is a block diagram of a receiver of a direct communication line with multiple carrier frequencies.

Description of the preferred embodiments
Referring now to the drawings, in which identical reference numbers designate identical or corresponding parts in the several views, and more specifically, to Fig.1, there is shown a communication system 2, which preferably is a cellular telephone system, although it is equally applicable in telephone exchange for common use (ATSAP), personal communication services (JCSS), satellite communication system, the internal radio or the external radio communication. System 2 uses the methods of modulation and demodulation multiple access code division multiplexing (mdcr) when communication between system resources. The system controller (selector) 10, commonly called switching center mobile phones (CKPT), includes UI design and processing to ensure the system group management basic soy telephone public network (PSTN) to the appropriate base stations 12, 14, 16, 17, and 19 for transmission to the appropriate destination stations. The connection to the PSTN or it may be by radio, optical fiber, or "wired" connection (for example, twisted pair or coaxial cable). The system controller 10 communicates with private networks and public networks, which include network data, multimedia, network, and other private network or public network. In addition, the system controller 10 communicates with other base stations, which are not shown in Fig.1, or from them.

The system controller 10 communicates with the base stations 12, 14, 16, 17, and 19 through various means such as dedicated telephone lines, fiber optic, coaxial line, or radio frequency (RF) link. The base station 12, 14 and 16 communicate with other systems, such as mobile station ("mobile") 18, through radio mdcr with one carrier frequency. The base station 17 and 19 communicate with other systems, such as mobile station 21 through the communication line with multiple carrier frequencies, consisting of three signals mdcr, shown by arrows 26a-C. the Mobile station 21 communicates with the base stations 17 and 19 through the reverse which may consist of more than three carrier frequencies, or it may consist of less than three carrier frequencies. Fig.1 also shows a direct system with transmission of signals over a wide range with many carrier frequencies and a more conventional system with a single carrier frequency, coexisting in the same system. It should be noted that, although it is possible, it is preferable that the system used only one type of direct communication lines.

The arrows 20A and 20b show the corresponding inverse and direct lines of communication between the base station 12 and mobile station 18. Arrows 22A and 22b show the reverse and direct lines of communication between the base station 14 and the mobile station 18. Similarly, the arrows 24A and 24b show a possible inverse and direct lines of communication between the base station 16 and mobile station 18. Although cross-connection lines between the respective base stations 12, 14, 16 are not shown in Fig.1, or straight, or radio frequency connection from the controller 10 to the mobile station 18, such features are included in aspects of the present invention.

The base station 12, 14 and 16, each transmits data traffic through the code channel Walsh to the mobile station 18 in a straight line 20b, 22b and 24b, when the system controller 10 assigns the base stations 12, 14 and 16 in the active abstentia 18. Code channel assigned for communication with the mobile station 18, also referred to as channel traffic. Each of the code channels transmitted from different base stations to the mobile station, contains redundant information, and accessible mobile station 18 for combining the respective code channels, using the mechanism of Association explode (explain here in more detail). To increase the transfer rate of a direct line of communication to the mobile station, can be used multiple code channels from the same base station. In this case the group of code channels is called channel traffic. The direct signal communication line includes a group of code channels, including the set of channels of traffic, and additional control channels, such as channels, pilot signal, the synchronization channel and paging (search call). The present invention reduces the transmit power of a direct line of communication by reducing the time when the traffic channels active during the soft transfer service.

The base station 12, 14 and 16 respectively transmit the pilot channel signal to the mobile station 18 in straight lines 20b, 22b and 24b. The TV pilot signal different from the traffic channels transmitted from the same database which I am apart of the displacements of the PN code of the pilot signal. In the absence of a lock or fading channel pilot signal received in the mobile station 18 from the base station 16, is expected to be a large power of a received signal, than those from base stations 12 and 14, because the base station 18 is closest to the base station 16.

Or, instead of a separate code channel (Walsh code for the pilot signal, the pilot signal can be enabled or multiplexed streams channel traffic that is sent to individual mobile stations. Incorporation can be accomplished by using special characters the pilot signal or the additional signal. When used, the inserted pilot signal typically has a common pilot signal, which is used for the initial capture system and to determine when to perform the transmission service, or a separate pilot signals may be transmitted on each channel traffic or for each group of traffic channels.

When mobile station 18 is in the area of soft transfer service (for example, when moving from the service area, at least one base station to at least one other base station), the system controller 10 sends a message to the transmission direction of the in the direction of the transfer service may also include additional information, such as thresholds transfer service (for example, the threshold for adding and threshold exceptions), which will be useful to the mobile station after the transfer service. As described in the aforementioned applications, and the standard IS-95, the active set contains the pilot signals from base stations with which the interface is installed in the mobile station. The set of candidates contains channels, pilot signal, which have been recently discovered by the mobile station with sufficient level, and the set of neighbors contains the channels of the pilot signal from base stations known that they are in the same geographic area.

Knowing which channels the pilot signal is likely to have a sufficient level (i.e., knowing which stations are assigned to the sets of neighbors and candidates of the mobile station), the processing required in the mobile station, is reduced in that the mobile station can more often to search for channels, pilot signal corresponding to the base stations in sets of neighbors and candidates of the mobile station, as well as in the active set.

Fig. 2 is a graph showing the relative channel quality of the pilot signal, which may be a mobile station 18 from the cell 12, 14 and 16, as shown in Fig.1. G is IGNOU station 18 depending on time for three typical channels, the pilot signal from the base stations 12, 14 and 16. As shown in Fig.2, the pilot signal from the base station 16 is deteriorating in quality over time, showing that mobile station 18 is removed from the base station 16. On the contrary, the pilot signal from the base station 12 is improved in quality over time, which means that mobile station 18 moves in the direction of the base station 12. The pilot signal from the base station 14 remains relatively constant in quality, showing that mobile station 18 moves along the perimeter of the service area of the base station 14.

The area of interest in Fig.2 - this is the soft transfer service. In the field of soft transmission maintenance mobile station 18 and the system controller 10 communicate with each other to determine which base station should be in the active set of the mobile station, based on the relative channel quality of the pilot signal cell 12, 14 and 16. In the illustrated example, the pilot channel signal from the base station 16 is initially in the active set of the mobile station, because the level of the pilot channel signal of the base station 16 is above a threshold level add. However, at the end of the soft transfer of the pilot signal from the base station 16 falls mobile station to delete the base station 16 from the active set, through message level measurement pilot signal transmitted by the mobile station to the system controller 10. Because the pilot signal from the base station 14 never surpasses a threshold level is added, the base station 14 is not added to the active set. On the contrary, the base station 12 passes the threshold level add in the required period of time and, thus, is added to the active set, which is defined by the controller station 10 in response to the message level measurement pilot signal generated by the mobile station 18. At the end of the soft transfer of only the signal of the base station 12 remains in the active set of the mobile station 18.

Often, taken with a poor quality of the pilot channel signal is detected above the threshold removal often enough to save the corresponding base station in the active set, even though the corresponding channel traffic makes a small contribution to the reception quality in the mobile station. This is particularly true in terms of slow fading. In the case of slow fading levels received from the base station signals change slowly relative to each other. Usually, for some time one base station prinimaet the creation explode. Thus, it would be preferable to transfer from a stronger base station, and not from a weaker base station.

The present invention aims to reduce the transmission time code channel from some base stations under fading to reduce overall energy transmission generated for the related transmission. Reduction of total energy transmission of specific transmission increases the overall throughput of the system. It should be noted that it is possible to use the transmission service that were removed would the base station from the active set, thereby reducing the transmit power. However, this approach requires considerable alarm in the infrastructure, and therefore, relatively slow. This makes it hard fast switch transfer from another base station, when the signal becomes stronger signal.

Another case in which this invention provides the advantage that, when one base station is adopted in the mobile station with a lower signal level than the other base station, but still above the threshold exceptions. In conditions with low sinking preferable to transmit only from the base station, the signal which prinimaetsya procedures transfer service to restore its active set, adds a significant delay in the case where the pilot signal becomes stronger. This delay reduces the quality of communication line and may cause reset calls.

Fig. 3 is a block diagram of the mobile station 18. The antenna 30 is connected through a diplexer 32 to an analog receiver 34 and the power amplifier of the transmission 36. The diplexer 32 communicates with the antenna 30 so that through the antenna 30 is simultaneously transmitting and receiving.

Taking RF energy from the respective base stations 12, 14 and 16 (Fig. 1), the antenna 30 at the same time, transmits the pilot signal and the code channel signals that are routed through a diplexer 32 to an analog receiver 34. Analog receiver 34 receives the RF energy from the diplexer 32 performs the function of power control open loop to control the transmission power of the mobile station for transmission on the return line (i.e., from the mobile station to the base station). More specifically, the receiver 34 generates an analog control signal power, which is supplied to the control circuit of the power transmission 38, as described in patent US 5056109, entitled "Method and apparatus for controlling transmit power in the system of cellular mobile telephony mdcr". REM the bit stream power control the reverse link, which was passed in a straight line and demodulated by the digital data receivers 40, 42 and 45. Analog receiver 34 converts the adopted RF energy in the baseband signal and converts it into digital form.

Digitized output signal from the analog receiver 34 is fed to the receiver search 44 and digital data receivers 40, 42 and 45, which are under the control of control processor 46, take the code channels from the respective base stations and serves the appropriate output signals to the combiner explode/decoder 48. Unifier explode/decoder 48 combines the corresponding output signals from the receivers 40, 42 and 45 on the basis of the scheme of the Association, described later in more detail.

Although in Fig.3 shows three digital data receiver 40, 42 and 45, the unifier explode/decoder 48 are usually equipped to communicate with multiple receivers of digital data. Preferably, the number of receivers of digital data included in the mobile station 18, is equivalent to the maximum number of code channels (counting for a direct signal and multipath signals of the spread received from each code channel), kotoroe possible with the inclusion of additional data receivers, and the present invention is applicable to any number of receivers of digital data (or multi-channel receiver digital signal data).

The digital data receivers 40, 42 and 45 communicate with the unifier explode/decoder 48 to form the structure of the "gathering" of the receiver (rake receiver). Unifier explode/decoder 48 communicates with each of the respective receivers 40, 42 and 45, which serve as three "directions" (branches) in the Assembly. More specifically, the receivers 40, 42 and 45 can be installed in the control processor 46 for receiving the code channels from different base stations or signal multipath propagation from a common base station. Thus, all three receivers 40, 42 and 45 can be used to accept a code channels from three different base stations, or code channel signal from the base station, which comes in three different signal paths (i.e., three signal multipath propagation). It should be clear that the receivers 40, 42 and 45 can be used for receiving any combination of signal multipath and code channels from different base stations. The collective structure of the receiver can be made in the form of many d is Ratnikov (so that is , having at least one channel) and combiners explode. In addition, the unifier of the explode may be included in the control processor 46 or one of the receivers 40, 42, 44 and 45.

In the preferred embodiment, the output signal of the combiner explode/decoder 48 is passed to the device is turned alternation and the decoder. The output signal of the decoder is generally passed through the control unit, which splits the received data stream to end-user data and control data. End-user data are served to the device data, for example, the speech coder.

Data issued from the device data, for example, the speech coder must be transferred through a return line to the base stations in the active set of the mobile station. The output signal of the digital circuit of the modulating signal of the user 50 is the modulating signal, which is formatted, encoded, paremesan and skipped to the modulator transfer 52, where it is modulated. The output signal of the modulator transmission 52 is passed through the control device, power transmission 38 under control of the control processor 46. The control circuit transmit power 38 adjusts the output 34, a bit in the power control loop, and the output RF signal is passed to the power amplifier of the transmission 38 which amplifies the output signal and transmits the amplified output signal via the diplexer 32 and passes through the antenna 30.

Converted into digital form, the if signal from the analog receiver 34 contains the code channel signals and the pilot signals transmitted by base stations in the active set pilot signal with other signals mdcr that act as interference to the mobile station 18. The function of the receivers 40, 42 and 45 is a correlate of the sample if a specific PN sequence. This correlation process provides increased processing", which increases the signal-to-noise ratio of the signal destined for the mobile station, by aligning PN sequence used in the respective code channels to encode messages sent to the mobile station. Not intended signals that have not been encoded coherent PN sequence, "expand" the process of correlation, thereby lowering the signal-to-noise ratio for inappropriate signals. The output signal of the correlation coherently detected is ocess detection is the sequence of encoded data characters.

Receiver search 44 under control of the control processor 46 scans the accepted channels of the pilot signal and the channel pilot signal multipath propagation from the base station via the direct rays and the reflected rays (for example, multipath propagation). Scanner receiver 44 uses the ratio of the energy of the received pilot signal at the elementary parcel (EC) to total adopted spectral density, noise and signals, denoted as Ec/Io, as a measure of the quality of the received pilot signal. The receiver 44 sends a signal level measurement signal to the control processor 46, showing the respective channels of the pilot signal and their levels.

Schema consolidator explode decoder 48 adjusts the synchronization introduced the received signals and adds them together. This addition process may be preceded by a multiplication of the match signals on a weighting factor corresponding to the relative signal levels of the channels of the pilot signal corresponding to the corresponding input signals. The weighting factor based on the level of the pilot signal, because it is assumed that the quality appropriate for each pilot signal corresponds to a signal transmitted on a code channel matched the ing explode with maximum respect. The resulting stream of the combined signal is then decoded using a decoder with error detection live stream, which is also found in the schema consolidator explode/decoder 48. The method of weighting on the basis of the pilot signal operates well when the base station in the active set transmit signals coded channels to the mobile station in an equal proportion with the pilot signal. That is, the ratio of the power of the code channel power pilot signal is the same in all members of the active set. If this attitude is not the same, then may be preferred other ways of weighing. For example, the base station may send to the mobile station, the signaling message, or any other means, the ratio of the channel power of the traffic channel power pilot signal used by all base stations contained in the active set. Then, if the relative share for base station j is equal toj, the mobile station may combine the code channels using weightwhereja relative received power of the pilot signal to the base station j in the mobile station. And src="https://img.russianpatents.com/chr/947.gif">jfrom a received signal from the base station j.

Diagram of the baseband signal 50 includes data interfaces code speech (vocoder) and other processing functions of the modulating signal. In addition, the diagram of digital modulating signal of the user 50 provides an interface to the circuits of input/output (I/O), such as handset, which introduces the speech signal into digital Converter and a vocoder (coder speech) contained in it. The output signal of the digital circuit of the modulating signal of the user 50 is fed to the modulator transfer 52, which modulates the coded signal on the carrier signal PSH, PSH sequence which corresponds to the assigned address for the outgoing call. This PN sequence is determined by the control processor 46 of the data call, which is transmitted by the base station (12, 14 or 16) and decoded by the receiver (40, 42 or 45).

The output signal of the modulator transmission 52 is supplied to the control circuit of the power transmission 38, in which the power transmission signal is adjusted analog signal to control power supplied from receiver 34. In addition, the control bits are transmitted to the base station in the form of regulation Monet modulated control signal power to the amplifier circuit power transmission 36, which amplifies and converts the modulated signal into an RF frequency. The power amplifier of the transmission 36 includes an amplifier that amplifies the power of the modulated signal to the final output level. Amplified output signal is then passed to the diplexer 32, which connects the signal to the antenna 30 for transmission to the base stations 12, 14 and 16. Signals intended for the system controller, are base stations 12, 14 and 16 and respectively passed through to the system controller 10, in which they are combined.

Fig. 4 represents a graph of the characteristics of the receiver with diversity, measured in probability of frequency of receipt of the errors in frames depending on Eb/No, where the receiver with diversity merges with the maximum respect. Shows four typical curves representing the probability of frequency of receipt of the errors in frames, respectively representing the receiver of the mobile station with one direction (M=1), two directions (M=2), three directions (M=3) or four areas (M=4), configured to receive signals from the respective base stations. Comparing the curves for M=1 and M=2, it is seen that the characteristic of the receiver having two napravleniya through observation, for a given error rate in frames (i.e., dashed line), the distance between the corresponding curves of the probability of errors in frames. In the illustrated graph, the improvement of the characteristics shown by the distance M1-2. Similarly, if the mobile station uses a receiver with diversity, with three areas, achieves the improvement of the characteristics of M2-3where, in General, M2-3less than the improvement of the characteristics of M1-2. Similarly, adding a fourth direction to the receiver explode provides improved characteristics, as shown M3-4. It should be noted that M3-4less than M2-3and M1-2. Thus, if the mobile station was the only mobile station in the system mdcr, receivers with diversity with increasing number of destinations, receiving a corresponding number of transmissions from base stations, would provide a continuously improving performance, although this improvement will be minimal for large M. in Addition, the above ratio characteristics suggests that in the process of merging are not involved areas containing only noise (or almost only noise). The absolute value of lucchio base station, and so on).

During the soft transfer service on system throughput is different impacts through the use of integration processes explode in a straight line and the return line. For example, on the return line connection, the mobile station transmits to the base stations 12, 14 and 16 through the paths 20A, 22A and 24A (Fig.1), respectively. Each of the base stations receives the transmission from the mobile station 18 and directs it to the system controller (selector) 10, which combines the respective signals of the base stations 12, 14 and 16, using the merge process explode. Because the transmission has only one mobile station 18, the system throughput is not harmful by use Association explode.

However, in a direct line of communication mobile station 18 comprises a number of signals (all have the same coded information) transmitted from the base stations 12, 14 and 16. The level technique known different ways of Association, including Association with the maximum respect, the Association with the same gain, and a simple choice by which selects one signal processing, and other signals are discarded. Provide Adelino will improve the characteristic, observed in the mobile station, but may actually reduce the overall throughput of the system mdcr, because the additional transmission from the base station, transmitting to the first mobile station, the background will be a hindrance to the second mobile station. Return a specific code channel depends on various factors, including its level relative to the code channels from other base stations.

The total power emitted in the communication system mdcr, usually less if you have enough gain in diversity. However, as it turned out, according to the present invention, the total power radiated, usually more than is needed for adequate performance, even if additional spacing is required. Does increasing or decreasing the amount of radiated power from each of the base stations depends on the characteristics of the transmission paths between the base stations and the mobile station. In accordance with one embodiment of this invention, the total transmit power from the system mdcr is set to a more optimal operating point by strengthening coordination between the mobile station 18 and the system controller (selector) 10. Followed openpussy ability.

Fig. 5A is a graph of the EU/O depending on time for the soft transfer service, in which three of the pilot signal a, b and C from the respective base stations included in the active set of the mobile station. During the passage of the soft transfer service, as shown in Fig. 5A, the changes in the respective communication channels for the pilot signal A (shown dotted line), b (shown In dashed line), and C (shown by the solid line) cause changes in signal level, and thus, the signal-to-noise ratio, resulting in oscillations of the respective pilot signals a, b and C. these changes offer significant potential to improve the gain explode, and the present invention shows how to use the gain explode to maximize system throughput by rapid change in the power distribution of the direct channel traffic.

The relative quality levels of the pilot signal (pilot signal) pilot signals a, b and C vary from frame to frame, and, as can be seen from Fig.5A, any of the signals a, b and C is changed according to the signal-to-noise ratio (SNR) relative to other signals. For example, in the first frame of the pilot signal And provides the bol is ignal-noise ratio of pilot signals b and C intersect (as shown in Fig.5A), and at the end of the frame 2, the SNR of the pilot signal In more SNR of the pilot signal C.

Fig.5B is identical to Fig.5A, but includes a level ofr(shown as the line crosses x), computed by the control processor 46 (Fig.3) the mobile station 18, whereris a fixed levelbelow the strongest signal-to-noise ratio of pilot signals a, b and C in the active set of the mobile station. Preferably,rthere is one number that received the control processor 46, although alternative can be usedr(i.e. many) to use grades to provide finer resolution quality of pilot signals. Control processor 46 calculates a threshold signalrpreferably continuously, although alternative can be obtained fragmentary or discreter.
As shown in Fig.5B, during the first frame, only the pilot signal And is at the threshold signalror above it, which, in this example, set by the pilot signal A (..src="https://img.russianpatents.com/chr/916.gif">dB below the SNR installed pilot signal). It should also be noted that the signals b and C are not on the signal levelror above it. Respectively, Fig.5B shows the frame 1, the pilot signal (as indicated by the symbol "A" written on the top axis "TIME" in the first frame) is the signalror above and has the highest average SNR in the previous frame interval. In frame 2, the highest SNR is the SNR of the signal And the pilot signal, and at least the pilot signal, and they are all aboverat the end of the frame. In frames 3 and 4 only the pilot signals a and b abover. In frame 5, the pilot signal has the highest SNR (and thusris calculated on the basis of the pilot signal). The pilot signal And then is the next level signal, and it is larger than the SNR of the pilot signal In, and they are all abover.
By calculatingrcomparisonrwith each of the corresponding signals from base stations in the active set, the mobile station can efficiently collect a large quantity is to be used by the mobile station by configuring the receiver with the passing of the mobile station and the unifier for optimal detection of signals, transmitted from the respective base stations. Additionally, in accordance with one embodiment of this invention, the characteristic of the communication system mdcr also optimized frequent transmission of the pilot signal with the best quality in the active set to the system controller so that the system controller can perform a corresponding regulation of the power distribution of the direct channel traffic between base stations in the active set. Information is rapidly transferred to the controller system 10 (Fig. 1), because the optimal number and selection of the transmitting base stations are not constant as the relative SNR of the signals from each base station to quickly change from frame to frame, as shown in Fig.5.

It should also be noted that the value ofthat is used to calculatercan be pre-recorded in the mobile station, or it can be sent to the mobile station through a signaling message or any other method of control. It should also be noted that the figures 5A and 5B described in the context of frames that can match the frames used for personnel synchrotone it is not necessary and the frames shown in Fig. 5A and 5B, may not correspond to any particular processing interval can be shorter or longer than the typical duration of 20 MS. In addition, different transmission, described above, are generated by different base stations. However, the invention also applies to any element that emits a signal straight line. In particular, the invention applies to different antennas on the same base station emitting the same signal. For example, the signals a, b and C in Fig. 5A and 5B can be from different antennas of the same base station, as could be the case where there are three antennas on a single base station.

It should also be understood that the set of signals a, b and C, shown in figures 5A and 5B, may come from any combination of base stations and antennas at the base station. For example, the signals a and b can come from two different transmitting antennas of the base station 17, and the signal can be transmitted from the base station 19. The signals a, b and C can be
signals direct lines of communication with multiple carrier frequencies, all transmitted from the same base station, or may be signals from different antennas radiating signals direct lines of communication with many bearing cast two carrier frequencies, and the signal In - one carrier frequency. The signal may consist of two different individual signals of the carrier frequency, but in this case, both of these carrier frequencies are radiated from the same antenna and will be taken by the mobile station essentially the same level, provided that they are transmitted with the same level. It should be also clear that in the real system can be much more than three signals (shown in Fig. 5A and 5B), which tracked the mobile station.

To quickly provide the controller system 10 (Fig.1) this information, the present invention provides a new communication Protocol between the mobile station and the controller system 10 described herein with reference to Fig.6A-6C. Figures 6A-6C show alternate forms of signaling or control messages in a message bit vector is transmitted to the controller (selector) system 10 through the signal return line communication transmitted from the mobile station 18 to the selector 10 via one or more base stations (12 and 14). The message vector bit is preferably transmitted on a frame basis, although more frequent service, as well as less frequent service, are alternatives.

In one example implementation of this sabres set of channels orthogonal codes, defined by the set of Walsh codes in a manner similar to a straight line. In the execution of multi-channel return line connection, the message bit vector preferably is passed through a channel orthogonal code in the return line so as to minimize the time delay before the system controller may use the information contained in the message bit-vector. System and method for data transmission using such a signal return line connection is described in concurrently pending application for patent US 08/654443, entitled "communication System mdcr with high speed data transfer".

In an alternative example implementation of this invention uses the signal return line with a single code channel, such as is used in the system, consistent with IS-95. The message bit-vector preferably is transmitted together with other user data in one code channel by time division multiplexing or puncturing bits of the data vector in PN code reverse link.

Fig. 6A shows the structure of the message data bit-vector quality of the pilot signal generated by the mobile station and transmitted to the controller 10 of the system through the base of one hundred is the system controller 10, which of the pilot signals in the active set of the mobile station has a signal quality that is equal to or above this standard (for example, the threshold signalrin Fig.5B). The message bit-vector need not necessarily be limited to 10 bits and can have different formats, different from the bit-vector, although it is desirable to have a short message. In order to reduce the number of transmitted bits, the message bit-vector assumes the location of the corresponding channel pilot signal on the basis of the initial order of the pilot signals identified to the mobile station from the controller system message transmission route service.

Standard mdcr IS-95 allows up to six items (pilot signals in the active set, all of which can be included in the message bit-vector quality of the pilot signal. In Fig.6A pilot signal having the best quality (i.e., the highest signal-to-noise), as determined using the process described with reference to Fig.5B, identified by a three-bit index data fields that uniquely identifies its position, as it was originally specified mobile station message transmission route service. the Ala from the second base station, communicated to the mobile station in the last message transmission route service, adopted with the highest SNR, a three-bit index is set to two (binary 010), or alternative 1, if the index varies from 0 to 8.

Bit fields U1U2U3U4U5and U6each refers to the respective pilot signals, as they are initially recorded in the message transmission route service and show accepted if the corresponding channel pilot signal is above signal thresholdr. For example, bits in the data fields U1-6set to 1 (or alternatively 0), showing the system controller 10, the pilot channel signal corresponding to that bit position, adopted equal to or higher than the signal thresholdr. In particular, if U1is set to 1, the system controller 10 recognizes that the first pilot signal, identified in the last message of the direction of the transfer service, has a signal-to-noise ratio at the mobile station is equal to or aboverwhich is computed by the governing process 46. U2-6also set the CPU 46 preferably on a frame-by-frame basis and is transmitted to the control which is the ordinal number of a message transmission route service. The data field of Nmis used to provide the system controller 10 identification of the active set to which the mobile station refers. Nmmay be a length of several bits; or it may be one bit. For the case of one bit of the Nmmay be the last bit of the sequence number. So, if the base station sends a message transmission route service with a serial binary numbers equal to "100" followed by "101", then the mobile station will return "1" in the Nmif it referred to a message transmission route service with sequence number "101" and will return "0"mif she was referring to a message transmission route service with sequence number "100". The inclusion of a sequence number of the base station can positively determine which pilot signal is referenced by the mobile station in a three-bit data field I1, I2and I3and set U1U2U3U4U5and U6.

In the example implementation of this invention, which includes a direct communication line with multiple carrier frequencies, the bit vector U1U2U3U4U5and U6can be extended to NM is. the same M may correspond to the number of possible direct communication lines with multiple carrier frequencies to the base station. In this embodiment, the mobile station informs the strongest of NM direct lines of communication with multiple carrier frequencies vector of I1, I2and I3(which may take longer to consider the need to identify the largest element NM), and reports what other channels with multiple carrier frequencies are aboverusing vector Ui. In an alternative embodiment, the mobile station informs the strongest base station, not the strongest carrier frequency, using a vector of I1, a then reports what other channels with multiple carrier frequencies are aboverusing vector Ui.

It should be noted thatrcan be attributed either to the strongest base station, or to the strongest carrier frequency from all base stations in the active set of the mobile station. Additionally it should be noted that the strongest base station can be set the carrier frequency, as was done with the components of multipath propagation from the same carrier, as is typically used in IS-95. Thus, the General level of the base station is given by summing the EC/Io of all the carrier frequencies of a straight line and all components of multipath propagation on a separate carrier frequency.

In response to the message bit field, the system controller 10 receives a message to the measured power and, as will be described herein, determines which of the signals contained in the active set should be removed from direct channels of traffic and which base station should continue the transfer. That is, the system controller 10 determines which base stations transmit signals which are below the threshold signalrusing the message bit field. The system controller 10 then instructs the identified base station to stop transmission of the channel traffic directed to the respective mobile station, which, in turn, reduces the transmit power of the straight line generated by these base stations. In an alternative embodiment, the base station instead of the system controller can take with the ku, although it may be less reliable when the mobile station is in the process of soft transfer service, when all the base stations (or base station that needs to transmit in a straight line), may not accept the transfer on the backward channel.

The base station did not meet the transmission channel traffic during the next data frame addressed to the corresponding mobile station. Because the signals from the identified base stations are accepted by the mobile station 18 with a significantly lower SNR than at least the signal from the other straight line, increasing the error rate of the mobile station will be little as compared with the decrease in the transmission power for the entire system. Although the identified base station stops the transmission channel traffic, the resources of the signal processing in these base stations will remain distributed and ready to start the transmission channel traffic at the request of the system controller 10. Also these base stations preferably continue to process the feedback signal lines of communication transmitted from the mobile station 18.

As the relationship continues, the mobile station 18 continues to monitor the relative level of drinking the measures when the pilot signal is above the thresholdr, mobile station 18 generates another message bit field indicating the change in condition. Mobile station 18 also generates a message bit field when you change the channel the pilot signal with the highest SNR. The system controller 10 receives a message bit field and gives some indication of the base station in the active set, the status of which has changed, or you can start sending traffic channels to the mobile station, or stop the transmission channel traffic, depending on the circumstances. Each base station responds by transmitting the next frame of data through the channel traffic, if there was a command to initiate the transfer or not transfer of the next data frame, if there was a command to stop the transmission channel traffic.

In alternative examples of the invention, the mobile station 18 generates a message bit field periodically, such as once per frame. By saving resources assigned to each base station for transmitting channel traffic channel traffic can be quickly turned on and off in response to rapidly changing conditions.

In another example embodiment of the invention controguerra gain shows the gain of the transmission power, which frame should be transmitted from the base station. When the system controller 10 accepts a vector showing that the pilot channel signal from a particular base station is received with a level that is less than the threshold valuerbelow the strongest pilot channel signal, a gain control in the next frame sent to this subscriber, decreases. Following frames may be further reduced, as additional vectors show that the channel pilot signal of the base station remains on the thresholdrbelow the strongest pilot signal.

The system controller 10 may perform a more complete analysis of the received bit vectors to better determine the stability of the environment in which the mobile station operates. In particular, the system controller 10 can control the speed with which a single channel pilot signal is changed from a state above to the state below thresholdr. If the rate of change exceeds a preset threshold, the system controller 10 determines that the mobile station is in terms of fading or other unstable environment and that, therefore, the signal is the definition of done the system controller 10 instructs all base stations of the active set to continue the transmission channel traffic straight line, even if some channels, the pilot signal is detected on the thresholdrbelow the best of the received pilot channel signal.

Fig. 6B shows an alternative data structure for a message bit vector quality of the pilot signal transmitted from the mobile station to the system controller 10 via the base station. This alternative embodiment are similar in structure to the data structure defined in Fig.6A, although only includes five bits to identify the six elements of the active set. Used only five bits, because the identification of the sixth (i.e., base station, providing the greatest signal-to-noise ratio) is defined by the first three bits of the message vector bit the quality of the pilot signal (i.e., I1-3). By uniquely identify the strongest signal in the first three bits of the message vector bit the quality of the pilot signal, each of the other elements of the active set of sequentially identified by a sequential bits in the message vector bit the quality of the pilot signal, this implies understanding togeny alternative message format vector bit the quality of the pilot signal, in which the first three bits of I1-3used to uniquely identify the strongest pilot signal of the base stations of the active set, the next three bits of the J1-3identify the second level signal, and the third set of three bits K1-3identifies the third level of the pilot signal elements from the active set. Thus, each of the three strongest pilot signals of the elements of the active set is uniquely identified. An extension of this embodiment, it would be adding an additional three bits for each of the fourth or fifth or sixth strongest pilot signal from the items in the active set, thereby uniquely identifying them. An additional example would be adding additional bits to the message to indicate the relative level of the pilot signals in a more accurate quantization levels, not just above or below the thresholdr. Still an additional embodiment would be to include all values of the EU/O for each pilot signal. Thus, for a system with six possible pilot signals in the active set EC/O would have been included for each possible pilot signal in the active set. To the values of the EU/O relative to that of the strongest pilot signal, is another possible example. Although each of the embodiments from 6A to 6C defines an alternative way to indicate the relative measured capacities mainly on frame-by-frame basis, a combination of these alternative methods are also possible. For example, the first six bits of the message to the measured power can be used to uniquely identify the first two of the strongest pilot signals of base stations, while the following three bits are used to identify the relative provisions of the following level three pilot signals (i.e., for a set of five elements).

A further alternative approach would be to have only one base station, transmitting to the mobile station. In this case you need to send only the message vector of three bits (i.e., I1-3) from the mobile station to the base station. An alternative device is a transmission from the base station with multiple carrier frequencies through only one antenna at a time. In this case, we need one bit to determine which antenna may be used. It is clear that it can be used in combination with the methods described above.

When communicating over isocline thresholdrto more effectively overcome the effect of fading. In contrast to the preferred embodiment, in whichrbased on the pilot signal with the highest average SNR per frame, in this example implementation uses minimum value: maximum pilot signal to determiner. Thus, if at least the strongest pilot signals are subject to fading, the threshold settingrat least the strongest pilot signal in the frame will allow more pilot signals above the thresholdr. Respectively, can be achieved a large amount of gain explode by combining signals from a larger number of base stations, thus adding another independent or at least semi-independent paths. More specifically, in the rapidly fading above a minimum magnitude for the strongest frame of a pilot signal, as expected well enough to act for a scenario of rapid fading, in which the duration of the fading are expected to be relatively small compared to the frame length.

the eh is great as in the case of conditions with fast sinking, primarily because the interleaver used in the admission process, does not provide this benefit, what he usually would when fading would have a duration less than the interval length alternations. However, in slow fading, in which the duration of the fade margin is larger than the interval of the interleaver requires a higher Eb/No to provide acceptable communication quality in the mobile station. In addition, the duration of one frame is too short to obtain the average value of levels of the respective pilot signals to determine are whether or not the corresponding channels are slow fading.

Accordingly, in this alternative embodiment, each of the respective base stations are equipped with a filter, which integrates and normalizes each of the bits Uk(Fig.6A and 6B) in the message vector bits. If the individual bits of the bits Ukswitch, i.e., at least one change state, then this switch indicates that the channel between each base station and the mobile station slowly sinking. Accordingly, the characteristic of the system mdcr will usovershenstvovannaya switch can also be used as an indicator in the system controller, to show whether the mobile station to be placed in the region of the soft transfer service. For example, if the bit field that represents the level of the pilot signal to the base station, almost always 0 or always 0, the corresponding base station must show that the pilot signal is actually much weaker than the strongest pilot signal, and the base station, giving a weaker pilot signal should not be included in the active set, because it adds no practical value to the characteristic of the mobile station. It should be also clear that the mobile station can effectively control the action of the switch and undertaking to send a message to the base station only when it wants to change the base station, transmitting to this mobile station.

Another alternative allows the processes of signaling and switching was faster. In this case, the mobile station signals the base station during fading, when the signal of the base station becomes stronger or weaker than the signals from other one or more base stations. The base station responds by transmitting or not re the answer faster than the controller of the base station, allowing that the first frame has been sent from one base station, and the next sequential frame was sent from another base station. It operates at a relatively medium speed fading. When the alarm system and switch faster switching can occur within a frame. In this case, the base station must accept data for transmission during a frame. In one example implementation, base station code, alternating and additionally process the data for transmission. The output stream is allowed or blocked based on feedback from the mobile station.

Alternatively, the threshold method to determine which pilot signals to identify the bit vector quality of the pilot signal, it describes the second way to assign directions. In the mobile station, the mobile station makes the assessment of the EU/O a received pilot signal from each base station from the active set. If the mobile station has no direction of its receiver with the division assigned to the base station EU/O for this pilot signal is set to 0. If the mobile station has the direction of the receiver explode, distributed although this alternative, can be used longer or shorter intervals averaging) and report this value. Period 20 MS corresponds to the frame length mdcr. The mobile station then identifies the highest pilot signal having the highest value of Ec/Io, and assigns the index Andm. For all other pilot signals in the active set of the mobile station sets the corresponding bit values in the message bit-vector is 1 if the value of Ec/Io for this pilot signal is within arthe value of Ec/Io for the maximum pilot signal. If the receiver has only N lines, where N is less than 6, then no more than N pilot signals are communicated in the message bit-vector.

Since the direction of the receiver can be appointed as the rays of the direct signal and the reflected rays (i.e., the reflection multipath propagation), the mode of appointment of direction prevents the message "too many base stations as having signals that can be used by the mobile station. For example, if receiver with diversity has three lines and only two base stations generate three signals with higher quality (i.e., the direct rays from each base station and the reflected signal), then there is not is a rule of the directions for its reception. On the other hand, if the pilot signal from a third base station periodically exceeds one of the other three signals, the mobile station may nevertheless report all three stations, as being above the desired threshold, because there are many cases in which a receiver with diversity is to combine the signal from a third base station. Thus, in one example embodiment of the invention, the SNR of the pilot signal to the base station is reported based on the direction with the highest SNR received from this base station.

Fig. 7 is a block diagram showing a preferred method for regulating the power distribution of the direct channel. The process begins with operation S1, in which the mobile station measures the levels of the pilot signals (signal quality) of all the pilot signals in the active set of the mobile station. The process then proceeds to operation S3, where the mobile station based on the measured levels of the pilot signals received at operation S1, generates a threshold signalr. Signalris generated based on the pilot signal with the highest SNR, based on measurements at operation S1. The process then proceeds to operation S5, in which ka is>to determine whether more appropriate (pilot signal)i thanror equal to him. This comparison operation is performed, preferably, over a period frame duration of 20 milliseconds and stops at the end of the period of the frame, although other sampling intervals taken at other points in the frame or many frames that are consistent with this example implementation. If appropriate (pilot signal)i is greater than or equal torbit in the message bit-vector is changed (see Fig.6A-6C) showing that the corresponding (pilot signal)i is greater than the thresholdr. However, if at operation S5 it is determined that (a pilot signal)i is not greater than or equal torbit in the message bit-vector is set to show that the corresponding (pilot signal)i is less than or equal tor(preferably by setting the bit to "0").

After the bit vector quality of pilot signals generated during operation S7 or S9, the process proceeds to operation S11, at which the mobile station sends a message bit-vector to the base stations in the active set of the mobile station. At this time, the mobile station ustanavlivat, to determine when the mobile station shall adjust its direction on the basis of pre-emption in the mobile station control system controller 10 of the power in the forward trafc channel in response to a previously sent by the mobile station, the message bit-vector. Install synchronization cycle (which is easily done by counting consecutive frames of 20 MS in the mobile station the mobile station determines when there is a change in the direct transmission channel traffic. After the operation S11, the process proceeds to operation S13, at which base station to accept and relay the bit vector quality of the pilot signals to the system controller. After the operation S13, the process proceeds to operation S15, in which the selector in the system controller processes the message bit-vector and generates a control message sent to each of the respective base stations of the active set of the mobile station, driving to the fact that of the base stations of the active set of the mobile station should transmit a corresponding code channel to the mobile station. By controlling transmission from each of the base stations of the active set of the mobile station, the total power emitted from base stations, náchod the th after as the timer reaches the time limit, the mobile station adjusts the direction in your receiver with the division in accordance with the base stations identified as having a signal equal to or greater thanras defined in the operations S7 and S9. Regulation directions of the mobile station combines the received energy only from those base stations of the active set of the mobile station, which actually transmit on their respective code channels. After the operation S17, the process is repeated, thus the mobile station continues to monitor the levels of the respective pilot signals for each of the base stations in the active set of the mobile station.

As generated by the mobile station a single message bit-vector and the response of the base station to the message bit-vector based on a given algorithm, the time when the base station changes the distribution of the direct line of communication known to the mobile station. Thus, the mobile station can reliably combine the signals from only those base stations that transmit at the present time. This has the advantage, because combining signals from base stations that are not bereitstellen affecting the result. This would lead to deterioration of the characteristics, the greater the required value of Eb/No and a decrease in throughput. Similarly, if the mobile station is not combined signals, which were transmitted to the mobile station, and which were taken with a sufficient level, would have been a decrease in throughput.

In one embodiment of this invention, the mobile station compensate for transmission errors in the reception bit-vector adopted by each base station, so that the first attempts to demodulate taken straight frame, assuming that the message was correctly received and processed by the base station. In most cases, the mobile station correctly demodulates the frame. However, if the erroneous frame, the mobile station may attempt to use a group of base stations that transmit to the mobile station, before she sent the last message bit-vector. Thus, if the base station has not received the last message bit-vector, then the mobile station will attempt to demodulate the frame, using a group of base stations that were used previously. This requires that the mobile station supported signal from another group basic a hundred with error correction shown optional operations S19 and S21 in Fig.7, as shown by the dashed line to operation S19.

Fig.8 is a block diagram of an alternative method to change the power distribution of the direct channel traffic for the base stations in the active set of the mobile station. The process begins at operation S32, at which the mobile station measures the level of the respective pilot signals of each of the base stations of the active set of the mobile station. Then, at operation S34 mobile station generates a threshold signalrbased on the measured levels of the pilot signals. Then at operation S36 mobile station compares the direct signals (direct i), and the signals of multipath propagation for each of the respective base stations, and compares the direct signals and/or signals of multipath propagation to determine whether more any direct signal or a signal multipath propagation thanror equal to him. If the direct signal or reflected signal multipath propagation more thanror equal, the process proceeds to operation S38, in which the receiver with the division assigns a direction or directions etc is ub> as determined at operation S36. Accordingly, the process then proceeds to operation S42. However, if at operation S36 it is determined that any of the direct signal and multipath signals of the spread of the respective base stations are not more than and not equal torthe process proceeds to operation S40, in which none of the areas of collecting receiver and no scheme of UNITER not assigned to that particular base station. The process then proceeds to operation S42. It should be noted thatrin Fig. 8 differs from those with Fig.7. In Fig.7rused to determine whether to report the pilot signal of Fig.8 it is used to determine to assign the direction of the collecting demodulator. If that is true, thenrin Fig.8 will typically be less than that in Fig.7.

In operation S42 mobile station sends a message bit-vector to the base station from the active set, showing the appointment should be made in the mobile station for the direct signal and multipath signals of the spread. If any of the direct signal or signals multipath propagation more thanror equal to it. The process then proceeds to operation S44, at which the base station relays the message bit-vector to the selector in the controller, so that the system controller has been informed of the purpose of the directions used in the mobile station, and thus could adjust the power distribution of the direct channel traffic base stations that are transmitting to the mobile station, for each of the base stations of the active set of the mobile station. The process then proceeds to operation S46, in which the selector sends a control message to the base stations in the active set of the mobile station, indicating which of the base stations must transmit on their respective code channels corresponding to the destination areas established by the mobile station. Base station to relay the control message to the mobile station so that the mobile station is notified that the base station were informed about the distribution system controller power forward channel traffic. The process then proceeds to operation S48, when to everyoane the system controller.

It should be noted that any control message sent from the mobile station to the base station or from the base station to the mobile station, may contain errors. Can be used technology similar to that which was described in connection with Fig.7. In this case, if the mobile station has not received a control message from the base station or if she took the frame with the error that it can demodulate the previous group of base stations that transmit to the mobile station.

Alternative way to change the power distribution of the direct channel traffic operations from S1 to S15 are the same as the operations shown in the preferred method, with Fig.7, while the base station transmits to the mobile station an indication of which of the base stations actually transmit on their respective direct channels of traffic. Thus, in this alternative embodiment, system controller, not the mobile station controls which of the base stations are transmitting to the mobile station.

This invention has been described with regard to a threshold relative to strongest pilot signal, as described in the text and Fig.5A and 5B. Can be used many alternate is, when the pilot signal significantly increases the total EU/O. This procedure is described in concurrently pending application for patent US 08/790497, entitled "Method and apparatus for performing soft transfer service in communication system".

This invention has been described from the point of view of transmission of full direct line of communication from a group of base stations to the mobile station. System and method for carrying out communication lines with high speed data transmission using the primary and secondary channel are described in the concurrently pending application for patent US 08/798949, entitled "Reducing power transmission for high-speed communication line mdcr soft transfer", and at the same time this patent application US 08/784281 entitled "Additional channel high speed data transmission for the communication system mdcr". In this system, the lines of communication with high data rate direct line of communication is divided into primary and secondary channels. The main channel is continuously transmits from all base stations in the active set. Additional channel transmits from the same base stations as the main channel, or from their subgroups. This invention primenenii communications with multiple carrier frequencies, with signal transmission in a wide range, and direct lines of communication with one carrier frequency, signal transmission in a wide range. Although it is not fully shown on the scale, for the case with multiple carrier frequencies wide frequency band for each carrier frequency shown in the 1.25 MHz, and for the case of a broad band of frequencies with a single carrier frequency wide band of frequencies equal 3,6864 MHz. The case of multiple carrier frequencies has several advantages, including the fact that each carrier frequency can be transmitted from an antenna configured otherwise, that, in turn, provides a unique structure of the fading for each carrier frequency, reducing the probability that all three carrier frequencies are sinking at the same time, and that, therefore, the connection can be interrupted.

Fig.10 is a block diagram of a transmission system with multiple carrier frequencies, configured in accordance with one embodiment of the present invention. Input surtace coded and punched using a conventional encoder 100, and the encrypted symbols repeated by the repeater 102 characters to add additional redundancy. Block interleaver block 104 punctuates repeated characters in the intervals presentationname long code generator 108 and decimation 110 in response to the long code mask of the user. Scrambled characters demultiplexer the demultiplexer 112 on three streams of symbols, each of which is transmitted to the signal corresponding to the carrier frequency.

For each carrier signal of a frequency corresponding streams of symbols are converted FMC (quadrature phase shift keying) using converters FMC 114. Each character CPM modulated by the same channel Walsh code using modulators Walsh code 116, and received an elementary parcel Walsh additionally modulated in-phase expanding code PSHIand quadrature extend code PSHQusing expansion devices 118. PSHIand PSHQpreferably the same for each carrier. Then each resulting wide character is converted with increasing frequency in a unique carrier frequency, preferably, as shown in Fig.9, and is transmitted. Fig.10 shows the modulation of the same channel Walsh code for each carrier frequency; however, channel Walsh code may be different.

Fig.11 is a block diagram of part of a receiver system used a mobile device to process the signal with multiple carrier frequencies, when it is configured in accordance with the bandpass filter 200 to 5 MHz and is converted by the a/d Converter 202 at a speed of 81,2288 MHz. In the filter block 204, two sections of 1.25 MHz sampling optionally converted with decreasing frequency in digital form in the modulating signal generator with digital control (MCC) to 1.2 MHz or optional MCC of 1.25 MHz, and MCC 2.5 MHz, and three sets of samples are filtered by a low pass filter to the frequency band of 1.25 MHz. This lowpass filter can be agreed upon by the receiver filter, or a part of it. The resulting sets filtered by lowpass filter data are passed to the collecting receiver 210, which demodulates and integrates various components of multipath propagation of the transmitted signal. The resulting merged data soft selection are passed to the device is turned alternation to restore the original sequence and subsequent decoding.

Obviously, in light of the above description there are many possible modifications and variations of the present invention. Therefore, it should be clear that within the scope of the attached claims, this invention may be practically performed differently than here specifically described.


Claims

1. The method of regulation u is the quality of the respective pilot signals, accordingly transmitted by multiple base stations in the active set of the mobile station, comparing the quality of the respective pilot signals with the standard, and the standard is determined depending on the quality of at least one pilot signal in said active set and the magnitude of changes in the quality of the signal representing the fixed signal level below the level of the strongest pilot signal from said pilot signal, transmitting a message to the system controller indicating which of the pilot signal in the mobile station is equal to the standard or exceed it, and adjust the power distribution of the direct channel traffic based on the aforementioned message.

2. The method according to p. 1, wherein the comparison generates a threshold signal as the standard on the basis of at least one of the pilot signals having the best measured quality within a given time interval, and compare each one of the respective pilot signals with a threshold signal.

3. The method according to p. 2, characterized in that during the transmission of the message to generate a vector of bits, making up the list in the given order of the variables representing the quality soo the lot-signals has a higher measured quality.

4. The method according to p. 3, characterized in that during the transmission of the message is passed a vector of bits to the system controller at least once in each frame Protocol mdcr IS-95.

5. The method according to p. 3, characterized in that during the transmission of the message is passed a vector of bits to the system controller at least one of the multiple frames and parts mentioned Protocol frame mdcr IS-95.

6. The method according to p. 3, characterized in that the communication system is a communication system mdcr IS-95, and when mentioned transfer operation to transmit the bit vector, either periodically or not periodically.

7. The method according to p. 2, characterized in that when measuring measure the corresponding signal-to-noise ratio for the pilot signals, and generate when generating a threshold signal based on at least one of the most relevant signal to noise ratio for the pilot signals.

8. The method according to p. 7, wherein when the generation is subtracted from the greater of the corresponding signal-to-noise predetermined level to generate a threshold signal.

9. The method according to p. 8, characterized in that the greatest of the respective signal to noise ratio is low, but in these comparison operations compare each one of the respective PI notable when compiling the list, additionally take a message transmission route service, which identifies the base station in the active set of the mobile station, in the given order, have the appropriate data fields of the vector bit so that they fit the mentioned order, and placed in the appropriate data fields to appropriate values, showing superior to whether the corresponding pilot signals of the threshold signal.

11. The method according to p. 10, characterized in that when receiving accept a set of received direct signals of multipath propagation, the respective pilot signals, and set the received direct signal and multipath signals of the spread contains a subset of the N received direct signals multipath propagation, each of which has a signal-to-noise ratio that is greater than each of the subset of signals that are not included in the subset of the N received direct signal and multipath signals of the spread, and if location are placed in the appropriate values, showing the excess of the respective pilot signals of the threshold signal, in the above-mentioned respective data fields only in the case if the signal and multipath propagation.

12. The method according to p. 10, characterized in that add to the mentioned message the data field of the active set, which identify at least one of the current active set, the last active set or the future of active set.

13. The method according to p. 1, characterized in that when measuring measure the quality of pilot signals transmitted by at least one relevant sector of the base station from the multiple base stations in the active set.

14. The method according to p. 1, characterized in that the regulation form the management team the power distribution of the direct channel traffic, showing which of the base stations must transmit the signals of the respective code channels to the mobile station, and which should not transmit signals of the respective code channels to the mobile station, and transmit the control command of the power distribution of the direct channel traffic to the set of base stations from the active set.

15. The method according to p. 1, characterized in that the trigger device synchronization in the mobile station, if the message is initially transmitted from the mobile station, and see when they have reached the delay time, the delay time from the second station, and when the power of the forward link traffic was regulated.

16. The method according to p. 15, characterized in that the measured distribution of branches of at least one branch of the receiver with diversity in a mobile station, and the distribution of branches corresponds to the pilot signals that have been mentioned in the message transfer operation is referred to as equal standard or exceed it.

17. The method according to p. 14, characterized in that during the operation of forming form the management team the power distribution of the direct channel traffic, to show that no more than N base stations must transmit the signals of the respective code channels to the mobile station, where N corresponds to the number of branches in the receiver with diversity in a mobile station.

18. The method according to p. 1, wherein the comparison determines whether distributed at least one branch of the receiver with the passing of the code channel signal from the base station, and when the transmission report which of the base stations provides a signal corresponding code channel, which was distributed mentioned at least one branch.

19. The method according to p. 18, characterized in that when transmitting generate the vector b is C.

20. The method according to p. 19, characterized in that when the transfer is included in the bit vector index that identifies one of the multiple base stations having at least two branches assigned to it.

21. The method according to p. 19, characterized in that when transmitting inform the bit vector to the system controller at least once in each frame Protocol mdcr IS-95.

22. The method according to p. 19, characterized in that when transmitting inform the bit vector to the system controller at least one frame from the set mentioned frames and parts mentioned Protocol frame mdcr IS-95.

23. The method according to p. 19, wherein said communication system is a communication system mdcr IS-95, and when the transfer is passed a vector of bits, either periodically or not periodically.

24. The method according to p. 8, wherein when generating additionally take a message transmission route service, which identifies the set of base stations in the active set of the mobile station, in the given order, have the appropriate data fields in said message to each of the multiple base stations so that they match referred to the specified order, and place mentioned in the appropriate data fields of sopotnica with the division of the set of base stations.

25. The method according to p. 24, characterized in that it further adds to the mentioned message the data field of the active set, which identify at least one of the current active set, the last active set or the future of active set.

26. The method according to p. 1, characterized in that the pilot signal transmit many signals of carrier frequencies.

27. The method according to p. 26, characterized in that the set of signals of carrier frequencies being passed from the corresponding set of differently configured antenna.

28. Communication system containing the set of base stations that transmit the corresponding pilot signals and the corresponding signals coded channels, the components of the direct channel traffic controller system for communication that is associated with many base stations, a mobile station, which contains in its active set is the set of base stations containing the receiver with diversity, which measures the quality of the respective pilot signals, a processor that generates a standard signal quality and prepares a message that indicates which of the qualities of the pilot signals is equal to said standard or exceed it, moreover, the standard is defined depending on the quality mdlalose a fixed signal level below the level of the strongest pilot signal from said pilot signal, the transmitter of the mobile station, which transmits the above-mentioned message to the system controller directly or through multiple base stations, and the system controller adjusts the power level of transmission of forward link traffic in response to receiving the above message.

29. The communication system under item 28, wherein the processor of the mobile station contains a device generating a threshold that generates a threshold signal as the standard on the basis of at least one of the pilot signals having the best measured quality within a given time interval, and a comparator, which compares the quality of the respective pilot signals with a threshold signal.

30. The communication system according to p. 29, wherein the processor of the mobile station device message formatting, which generates in the above message bit vector containing a list of values representing an indication of whether the quality of the respective pilot signals of the threshold signal or exceed them, and an index that indicates whether the pilot signal has a higher measured quality.

31. The communication system according to p. 29, characterized in that the transmitter podviznogo p. 30, characterized in that the transmitter of the mobile station transmits a vector of bits in at least one of the multiple frames and subframes Protocol mdcr IS-95.

33. The communication system under item 28, wherein the receiver with diversity includes receiver, pilot signal, which measures the quality of the respective pilot signals, and N branches, each of which receives signals from at least one of the mentioned code channel through at least one of the paths: the direct path and the path of multipath propagation from the base station.

34. The communication system under item 33, wherein the processor includes a distribution device that assigns mentioned N branches of the subset of the N signals to at least one of the code channels that have a signal-to-noise greater than all other signals corresponding code channels, and the device message formatting, which provides the list and the index in the above message, and the list contains values representing whether the corresponding pilot signals from said subset of the N signals to at least one of the code channels, and the index indicates which of the pilot signals is the best ismaren notesto sectors, which transmit respective pilot signals and the corresponding code channels in the selected geographically separate area.

36. The communication system under item 28, wherein the system controller comprises a control processor that determines which of the qualities of the pilot signals identified in the message as equal to said standard signal quality or surpassing it, correspond to the subset of the multiple base stations, and the device format control signal, which generates a control signal to the set of base stations to control the power distribution of the direct channel traffic by controlling the power levels of the code channels of the mentioned subset of the multiple base stations, which is defined by the control processor.

37. The communication system according to p. 30, characterized in that the said device formatting the message contains a receiving device that receives a message transmission route service, which identifies an orderly set of base stations in the active set, and the device host that has the appropriate data fields for each of the multiple base stations t the data, corresponding to the mentioned order, and the above-mentioned values indicate whether the quality of the pilot signal threshold signal or surpass it.

38. Device to change the power distribution of the direct channel traffic containing a movable unit comprising a means for measuring the qualities of the respective signals transmitted by multiple base stations, means for generating a standard signal quality on the basis of the qualities mentioned signals measured by the means for measuring, and the magnitude of changes in the quality of the signal, and the signals are pilot signals, and the change value is a fixed signal level below the level of the strongest pilot signal from said pilot signal, means for generating a bit vector, giving a list of base stations with measured quality of the signal is less than said standard, each of the base stations is in the active set of the rolling unit, transmitter, which transmits the above-mentioned vector of bits, and means for regulating the power distribution of the direct channel of the multiple base stations on the basis of multiple base stations identified in the bit vector.

39. The device according to the signal as the standard signal quality, on the basis of at least one of the pilot signals having higher measured quality within a given time interval, and a comparator that compares the corresponding quality of the pilot signal with the threshold signal.

40. The device according to p. 38, characterized in that the said means for measuring comprises a receiver with diversity, having N branches, the device includes a determination device that determines whether at least one branch receiver diversity is distributed to the code channel signal from the base station, and means for generating a bit vector gives a list of base stations that provide the appropriate signals coded channels, which were distributed mentioned at least one branch.

41. The device according to p. 38, characterized in that said signals are composed of many signals of different carrier frequencies.

42. The device according to p. 41, characterized in that the set of signals of different carrier frequencies transmitted from a corresponding set of differently configured antennas.

 

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FIELD: radio communications.

SUBSTANCE: proposed method intended for single-ended radio communications between mobile objects whose routes have common initial center involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from mobile object, these intermediate transceiving drop stations being produced in advance on mentioned mobile objects and destroyed upon completion of radio communications. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

1 cl, 7 dwg, 1 tbl

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