Orthogonal frequency division modulated stationary wireless regional network employing user's room equipment provided with indoor antenna
FIELD: communications engineering.
SUBSTANCE: stationary wireless access system has, as a rule, user's room equipment unit connected through Ethernet interface to personal computer or to local network and base station unit connected through Ethernet interface to network. User's room equipment unit as such is easily installed by user while base station unit is usually mounted on mast at distance of 1 to 5 miles (1/6 to 8 km) from user's room equipment unit. Both the latter and base station unit usually incorporate integrated transceiver/data switch that provides for radio-frequency communications in the range of 2.5 to 2.686 GHz. Multiplexing with orthogonal frequency division of signals is used during transmission between user's room equipment units and base station ones over ascending and descending lines.
EFFECT: provision for using outwardly accessible antenna affording transmission within line-of-sight range.
70 cl, 19 dwg
The CLAIM TO PRIORITY
This application requires priority simultaneously considered provisional patent application U.S. "Fixed Wireless Access System" number 60/161107, filed October 22, 1999. In this regard, the specified preliminary application is entirely incorporated here by reference.
The technical FIELD TO WHICH the INVENTION RELATES.
The present invention relates in General to systems for wireless data transmission. In particular, the present invention relates to stationary wireless regional network (PC), which uses a modulation carrier-based multiplexing orthogonal frequency division (MOCP), and network configuration allows for the equipment installed at the customer premises (CPE, OPP), the antenna that is deployed inside the premises of the user, instead of using available outside antenna, located on the line-of-sight for transmission to the base station.
The LEVEL of TECHNOLOGY
Well-known wireless data transmission systems, which send and receive data uses radio frequency (RF) signals. Usually, the wireless data transmission technology is currently used in high performance communication systems such as satellite communication or microwave mast connection, or in systems which LIGNA connection based on a local area network (LAN), such as wireless LAN for home or office equipment. In the case of long-distance communication systems necessary point-to-point antenna system, and to generate a transmission path, the receiver and transmitter must be on the line-of-sight. In the case of near field communication based on a wireless LAN, you can use Omni-directional antenna system, and there is no requirement of direct line-of-sight for transmission, since the distance in this case is usually less than one mile. These two cases are distinguished by the fact that RF signals quickly decay at large distances or when passing through obstacles, such as buildings or walls.
Regional network (PC) is a network that can provide connectivity to medium distances from 1 to 40 miles (1.6 to 65 km), which is usually necessary to provide coverage of the entire region. A good example of a wired system PC, where as the medium for transmission used telephone wire is the digital subscriber loops (CAC). Another example of a wired PC system is a cable modem system, where the environment is used for connection of the coaxial cable. One of the main advantages of the PC system is that it provides a higher data rate compared with the known telephone modems. The main problem of these wired item PC is the cost of installation and maintenance environment for high-quality connection-based telephone network or coaxial cables. Stationary wireless PC has the obvious advantage consisting in the absence of costs associated with installation and maintenance of wired network connection.
Another advantage of the fixed wireless system PC is that the medium for wireless communication may be selected so as to provide higher speed data transmission than in the known wired PC systems. This advantage is explained by the fact that stationary wireless PC systems that are deployed today, designed for relatively expensive networks with dedicated channels, with very high performance. The interest in these stationary wireless PC systems is currently a small number of users who need high speed data transfer that can justify an expensive and complicated installation of such systems on an individual basis. Because of the limited user base and needs for the highest quality development the design of existing fixed wireless PC was primarily on creation of high-quality long-range wireless connection.
Although the development of systems RF communications takes into account many factors, a number of the most important factors that should be taken into account when designing fixed up the ne PC are assigned to frequency, type of modulation signal and the modulation of the access carrier. Assigned frequency refers to the frequency or oscillation signal available for use by the system. An example is the designated range for AM (amplitude modulation) radio signals in the range from 500 to 1600 kHz. The modulation signal relates to a method for encoding information or data in the RF signal. An example is the difference between radio signals with amplitude modulation (AM) and radio frequency signal with frequency modulation (FM). Modulation of carrier access relates to a method of use of the assigned carrier frequency for the RF signal. An example is the difference between using a single wide channel or multiple narrow channels in the same assigned frequency band.
For the purposes of this invention in the construction of fixed wireless system PC use frequency bands below 10 GHz. Developed other wireless communication systems at medium distances, such as local multipoint distribution system (LMSR), which operates at a much higher frequency ranges, for example, from 28 to 31 GHz. The use of such high frequencies is associated with a number of technical problems and requires a large external antenna systems that provide transmission line-see the STI from the roof of one building to the roof of another.
Because of the desire for higher data rates on all existing stationary wireless PC systems used a complicated scheme to modulate the signal. To support high-speed transmission in the direction of traffic in these systems typically use 16-bit quadrature amplitude modulation (QAM) or 64-bit QAM for transmission in the direction of traffic from the base station to the OPP-rate data component of at least 10 Mbit/s
Unlike many stationary wireless LAN, which have been developed for near field communication, and where a variation of the modulation access carrier spread spectrum, when one signal extend to a designated frequency band, in a relatively small number of stationary wireless PC systems that have been developed to date, as a modulation method of access to the carrier selected multi-carrier modulation. When the modulation multi-carrier signal is divided into several parallel data streams, and these parallel data streams are simultaneously sent through channels with different, lower rate, and then are reassembled at the receiver, resulting in a higher effective rate. The modulation scheme for multi-carrier, which was developed by the Committee a standard of the IEEE, for use as an extension of the 802.11 standard for wireless LAN with the goal of providing high-speed wireless data transfer, known as multiplexing orthogonal frequency division (MOCR). The modulation scheme MOCR provides a more efficient use of the assigned frequency band and increases the possibility of receiving high-speed transmission.
For all these complicated modulation schemes used in existing fixed wireless PC usually requires more expensive equipment and a large transmit power at each base station. To benefit from the increased investment associated with the unfolding of each base station, developed existing fixed wireless systems PC, which minimizes the number of base stations required to cover a given region. The radius of the normal coverage for existing wireless systems PC is from 10 to 30 miles (16 to 50 km).
Also use the coverage area of a larger size, to minimize the need for repeated use of the same frequency channels in adjacent coverage areas. As for data transmission with higher speeds on all existing stationary wireless PC systems use higher power PE is Adachi, signals of higher power does not allow you to re-use the same frequency channels in adjacent coverage areas and can even prevent reuse of the same frequency channels at distances of three to five times the radius of the coverage area. Thus, the use of coverage increased size reduces the impact of problems caused by the impossibility of re-use of frequencies in adjacent coverage areas.
The most significant disadvantage of using for each base station's coverage area is large in size is increasing the likelihood of loss or signal attenuation between the base station and the RPF. To combat possible signal loss over long distances and improve reception with a higher capacity and higher transmission speeds on all existing stationary wireless PC systems use point-to-point antenna system, which requires transmission over line-of-sight between the base station and accessible from the outside antenna is connected to the RPF. Figure 1 as the example shows a known configuration of fixed wireless system PC, in which the RPF in a single-user environment, for example in the house connected to the antenna, which is located outside the environment the user is in an environment where multiple users for example, in a small office, each KPI is connected to its own antenna located outside the environment of these multiple users.
Given the relatively limited number of users and demand for high quality performance, dictated by the development of existing fixed wireless PC systems, using available external antenna that provides transmission over line-of-sight, is a necessary and obvious. However, it is desirable to create a fixed wireless system PC, which does not require accessible from the outside antenna and which could be deployed over a larger area to provide higher data rates with higher efficiency and reach more users.
The above needs are largely satisfied stationary wireless system PC using MOCR of the present invention. Fixed wireless access system typically contains the power equipment installed at the customer premises (OPP), through which the Ethernet interface connected to the computer small office/home computer or local network, and block the base station through the Ethernet interface connected to the network. Block OPP is at home or indoors n is a large office and has the antenna, which is deployed within the premises and is easily installed by the user. Preferably, the block of the base station was mounted on the mast within 1-5 miles (1.6 to 8 km) from block OPP. Block OPP preferably includes internal integrated transceiver/switch data, which allows you to take a digital signal from a computer or network, to convert the signal to analog format and to transmit the analog signal based on radio frequency technology in the operating range, preferably of 2.5-2,686 GHz, to the base station. The unit of the base station preferably includes an integrated transceiver/switch data. After signal reception unit of the base station converts the analog signal back into a digital signal and delivers this signal through an Ethernet connection to a PC, LAN, and/or network. When the transmission of ascending and descending lines between blocks OPP and blocks of base stations uses the multiplexing frequency division.
Fixed wireless access system broadcasts using MOCR signals that include characters MOCR. Characters MOCR presented without adjustment of character and are determined on a per-symbol basis.
In a fixed wireless access system used transmission with RA is bucoy frames on the downlink and transmitting without breaking it down into frames for uplink communication.
BRIEF DESCRIPTION of DRAWINGS
Figure 1 - General view of the known fixed wireless system RA that uses an external antenna.
Figure 2 - General view of the stationary wireless system PC with MOCR according to the present invention, which uses an internal antenna.
Figure 3 - General view of the ICT structure in a cell of a fixed wireless access system according to the present invention.
4 - cell system according to the present invention.
5 is a known standard cell scheme with reuse of channels.
6 is a well-known cell diagram with reuse of channels using multiple access with time division multiplexing (MDR).
Fig.7 - preferred cell diagram with reuse of channels according to the present invention.
Fig - location time intervals for ascending and descending gear used by the system of the present invention, as well as the location of message packets contained in the time intervals.
Fig.9 is a block diagram of the processing of the bit stream of the data packet that is transmitted or received on the radio frequency in a fixed wireless access system according to the present invention.
DETAILED description of the INVENTION
Figure 2 presents a General view of the stationary wireless regional network (PC) to newterm equipment, installed in the premises (RPF), use the internal antenna according to the present invention. As shown in figure 2, fixed wireless system 10 access according to the present invention can be configured for option environment for a single user or for environments with many subscribers, for example, in a local network. The system 10 is designed to transfer data from users and to users of the system 10 through the use of technology is highly reliable radio. The system 10 may be particularly good demand for domestic use and small/home offices (SOHO).
Figure 3 is a summary of the ICT structure of the honeycomb fixed wireless access system 10. As shown in figure 3, the system 10 generally includes one or more host computers, such as one or more host computers 12 and/or one or more servers 13 a LAN that is connected to one or more blocks 14 of the equipment installed at the customer premises (OPP)through an Ethernet connection 16. Each block 14 OPP supports communication with one or more blocks 18 of base stations in the system 10 via RF signals. Each block 18 of the base station is connected via the Ethernet interface 19 to one or more networks 19 different types or patch p is churam, for example, using asynchronous transfer mode (ATM ARP).
I. SYSTEM COMPONENTS, COMPONENT DISTRIBUTION AND RECOGNITION COMPONENTS
Each block 14 OPP includes the hardware required to implement communication via Ethernet with the personal computer 12 of the user or server ABC and radio communications with the blocks 18 of the base station. These hardware preferably implemented (at least partially) through the use of technology programmable matrix of logic elements (PLA) or technology-specific integrated circuit (SIS) and is preferably designed for a maximum power of about 10 watts. In particular, each block 14 OPP preferably includes an integrated transceiver/switch data and one or more Ethernet connectors, such as connector 10s-T RG45 (10Base-T is the transmission medium defined by IEEE 802.3, in which information is transferred at speeds up to 10 Mbps in unmodulated form using twisted pairs of wires, which are also called unshielded twisted pair (UTP)). With regard to the integrated transceiver/switch, it should be noted that it can be used discrete components that are not beyond being or volume this is the first invention.
To facilitate mounting block 14 OPP integrated transceiver/switch preferably comprises a directional antenna, which allows the user to set the unit 14 OPP close to the corresponding host computer 12 at the customer premises. The use of standard Ethernet connector 22 is further facilitated by the setting unit 14 OPP and allows the user to easily set the unit 14 OPP for communication with the host computer 12 and the server 13 of the local network. Preferably, the size and shape of the block OPP 14, it was possible to locate and/or to mount it on the desktop, again additionally facilitates the installation of the equipment.
Block 18 of the base station includes the hardware necessary to implement Ethernet communication networks 19 one or more different types or switching structures, for example, using asynchronous transfer mode (ARP), as well as an RF link with the blocks 14 OPP. These hardware preferably implemented (at least partially) through the use of technology PLA or technology SYSTEM and preferably designed for a maximum power of about 100 watts. In particular, each block 18 of the base station, and each block 14 OPP, preferably assortment of the company includes an integrated transceiver/switch data and one or more Ethernet connectors, for example, the connector 10Base-T RG45. With regard to the integrated transceiver/switch data, it should be noted that it is possible to use discrete components that are not beyond being or scope of the present invention. Preferably, the block 18 of the base station was also equipped with a receiver of global positioning system (MUH, GPS) to provide a temporal reference, to ensure appropriate resolution and accuracy of the system. The system 10 preferably uses pulse-time SGP to ensure synchronization of geographically distributed units 18 of base stations to avoid interference between the blocks 18 of base stations. With regard to the integrated transceiver/switch, it should be noted that it can be used discrete components that are not beyond being or scope of the present invention.
According to figure 3 the block 18 of the base station preferably is mounted on the mast for increasing the distance beyond that which is provided by line-of-sight. High gain system, provide appropriate levels of transmission, the gain of the antennas and the receiver sensitivity, helps to ensure the functioning of the unit base station 18, no limit is as the line of sight. If the block 18 of the base station is mounted in the lower part of the mast, between the block 18 of the base station and its antenna will require a longer coaxial cable. The elongation of the coaxial cable reduces the gain of the system and reduces the working distance for a given degree of coverage, not limited by line of sight.
Each block 18 of the base station, as shown in figure 4, is located in a distributed mobile system 30, where each cell 32 preferably includes one or more of the sectors 34, and each sector 34 preferably includes a block 18 of the base station. Figure 4 as an example, presents the scheme of the distributed cell system 30, in which each cell 32 has six sectors 34. The communication radius of each cell 32 is preferably about 1 to 5 miles (1.6 to 8 km) with a standard radius of 3 miles (5 km). However, deploying units 18 of base stations by sector does not restrict the use of a single Omni-directional unit 18 of the base station. In particular, for operation in one cell do not need to have a cell with multiple sectors. In the case of a small geographical area, for example, with a radius of less than three miles (less than 5 km), where the potential number of users is small and one block 18 of the base station is able to provide the required bandwidth for the transfer of the y data, can be installed one base station with an Omni directional antenna and high gain.
Once properly installed, each block 14 OPP and each block 18 of the base station, any of them will be able to send and receive communication signals from each other. Essentially the combined action of the RF link between the block 14 of the RPF and the block 18 of the base station is a standard Ethernet switch with some additional improvements. For example, between blocks 14 and 18 is facilitated by the wireless communication due to the fact that each block 14 OPP and each block 18 of the base station is assigned a unique address just as it is done in switching the Ethernet system. In addition, the wireless communication between the blocks 14 and 18 preferably is in the form of data packets, where the packet includes a source address and/or recipient that indicates what unit 14 OPP or from any unit 18 of the base station came the communication signal and/or on which of these blocks is transmitted communication signal, respectively, which again is analogous to the Ethernet switching system. Broadcast traffic, such as traffic sent to all units in the system 10, may also be transmitted between the blocks 18 of base stations and blocks 14 OPP just as it occurs in the switching system thernet.
Thus, as the Ethernet switch improves system performance Ethernet switching configuration provided by block 14 of the RPF and the block 18 of the base station increases the efficiency of the system 10, allowing for distribution only significant traffic between the blocks 14 of the RPF and the blocks 18 of base stations; data packets are filtered and routed based on address their sources and/or recipients without interference from the intermediate block 18 of base stations, that is distributed switching. In addition, as in the Ethernet system, the block 14 of the RPF and the block 18 of the base station implement dynamic management Protocol the main computer (DPPC), which is monitored by a block 14 of the RPF and the block 18 of the base station to dynamically determine the hardware address of the physical network of the lower level, which corresponds to the address of Internet Protocol (IP) high level of host computers 12 connected to the block 14 OPP.
In particular, when the block OPP first comes online, it starts to monitor the signals of block 18 of the base station, using your transceiver. When the unit 14 OPP detects a sufficient quality of the signal unit 18 of the base station, unit 14 OPP is assigned to the block of the base station 18. Unit 18 the base station uses an authentication server in the network 20 to determine whether allowing the Yong Lee block 14 OPP, and determine how many host computers 12 may be connected to the unit 14 OPP. Then the block 18 of the base station either rejects or confirms power unit 14 OPP with the permitted number of host computers 12. After fixing one of the blocks 18 of the base station unit 14 OPP enters into a phase of recognition (address), when the block 14 OPP, tracking traffic, learns layer-3 address and the address of the Ethernet physical layer. Monitoring traffic is that one of the main computer 12 requests the address of the level 3 from the server on the data network, i.e. the LAN 13, and receives the response from the server preferably according to the Protocol DPPC.
By monitoring traffic, block 14 OPP creates a table of level 3 for the excluded host computer (PCs), consisting of the IP address and the corresponding hardware address of the physical network of the low level Ethernet. When creating this table block 14 OPP able to ensure the absence of a message transmission on the radio link on the block 18 of the base stations that have the destination address of the layer 3 corresponding to the host computer 12 is connected to the block 14 OPP through the LAN interface 13. Like the block 14 OPP block 18 of the base station monitors the traffic and creates a table of level 3 of the host computer (computers), consisting of the IP addresses corresponding to the physical hardware address of the CE is low level Ethernet and the relevant "essential" hardware address block 14 OPP. When creating this table unit 18 of the base station is able to ensure the absence of a message transmission on the radio link, when the message includes the destination address of the layer 3, which is not in the address table block 18 of the base station.
In addition, like the Ethernet system unit 14 of the RPF and the block 18 of the base station preferably implement the Protocol recognition addresses (ARP, PRA), which is used by end devices, mainframe computers and other computers connected to the network for dynamic detection hardware address of the physical network of the low level Ethernet connected to the host computer 12, which corresponds to the corresponding IP address of the specified host computer 12.
However, unlike standard Ethernet systems fixed wireless system 10 provides access for the PROTO block proxy, when one of the blocks 18 of base stations can respond to requests PRA intended for the host computer 12 connected to the block 14 OPP. Acting on behalf of block 14 of the RPF intercepts his powers unit 18 of the base station assumes responsibility for directional data packet and may respond, for example, block 18 of the base station may send back a valid Ethernet address control medium access unit 14 OPP. Of course, you can use other and/or complement the global protocols as intermediaries, not beyond being or scope of the invention. Using PRA and block proxy PRA, you can save bandwidth and improve the efficiency of the system 10, that is to reduce the schedule of broadcasting. In addition, the block 14 KPI monitors the data traffic of the main computer (12), which is connected to the block 14 OPP. If the traffic that is destined for another host computer 12, which is also connected to the block 14 OPP, then in block 14 of the RPF does not pass this traffic in block 18 of the base station, and therefore able to be saved bandwidth and the efficiency of system 10.
Unit 14 OPP preferably implements a function of roaming, allowing you to move the block 14 OPP from the premises within a radius of one unit 18 of the base station, in the premises which are in range of another unit of the base station, or to switch to other base stations 18, if you want to get out of the ether. Unit 14 OPP continuously monitors the quality of the signals of all blocks 18 of base stations and fixed for another block 18 of the base station, when the signal level of the current block 18 of the base station becomes lower than the signal level of another block 18 of the base station. As in the case with the original unit 18 of the base station, when there is such a change, block 14 OPP is logged in but the th unit 18 of the base station, and in addition, reports on a new block 18 of the base station table of address layer 3 addresses and the Ethernet physical layer the main computer 12, which is connected to the block 14 of the RPF to ensure correct synchronization of the tables between the RPF and the new block 18 of the base station. Then a new base station 18 independently performs GREAT, to update the table of the former unit 18 of the base station with the aim of accelerating the necessary switching of traffic blocks 18 of base stations on the block 14 OPP for the respective host computers 12.
In addition, the host computer 12 can be detached from a single block 14 OPP and connected to another unit 14 OPP. Then a new block 14 OPP will be able to see the traffic that the other host computer 12 is enabled on the LAN interface 13. Then a new block 14 OPP is logged in-added the host computer 12, adding to his table layer-3 address and the address of the Ethernet physical layer. Then the block 18 of the base station associated with the new block 14 OPP determines that a new main computer 12, and creates a new entry in the address table block of the base station for the new host computer 12. Block 18 of the base station optionally independently performs the RIGHT to update other blocks 18 of base stations.
II. SYSTEM DATA TRANSFER
Fixed wireless si is the subject 10 access preferably operates in the frequency range of special services educational television/multipoint distribution service (ITFS/MDS) from 2.5 to 2,686 GHz. The Federal communications Commission (FCC FCC) licenses these frequencies in the form of channel 31, each of which has a width of 6 MHz for duplex digital communication. In a recent ruling, the FCC has determined that the license for the channels will be issued as an unconditional license, thereby eliminating the need for each user to register their unit 14 OPP and eliminating the need for individual registration for each block 18 of the base station.
As mentioned above, the system 10 preferably is a cellular system 30, in which each cell 32 in the system has one or more sectors 34. One 6 MHz channel can be used to maintain the entire system by using a combination repeatedly (re -) used cell frequency and method of multiplexing time division. In an alternative embodiment, can be used multiple 6 MHz channels, with the addition of channels increases the throughput of the system 10 in relation to radio frequency communications and performance.
In the preferred system 10, as shown in figure 4, uses cellular system 30, in which each cell 32 is divided into six sectors 34 and provided with six channels, so that one sector 34 may use the channel constantly. With such a preferred configuration, the system 10 provides a schematic repeat the CSOs use 1:1, the transmission speed of 9 Mbps per sector (54 Mbit/s per cell) and speed data to 3 Mbps per sector (18 Mbit/s per cell). The preferred system 10 is able to support approximately 300 active users per sector (1800 per cell) and approximately 1000-1500 subscribers per sector (6000-9000 per cell). The system 10 is designed, at least for the simultaneous support of at least 250 active users per sector.
For multiple (repeated) use of frequencies in known wireless systems typically require at least one ring of dividing cells. Refer for example to 5, where in the known system, there are three frequencies used in the comb, as shown in three different hatches. In the configuration of figure 5 cellular system separates each cell that shares the same channel set of at least one hundredth 32, in order to minimize interference, when it is allowed to use the same frequency in another part of the system. In another known wireless system to reduce the frequency interference between cells is used multiple access with time division multiplexing (mdvr, TDMA). Refer for example to 6, where each cell 32 is divided into sectors 34, each sector 34 has its own frequency channel, and the channels are repeated in the following with Sedna cell 32. To ensure the reusability frequency technology is used mdvr that gives each user a unique time interval in the channel. So, at the bottom sauté 32, sector 1, the user transmits in accordance with the specified signal is a discrete time, in the adjacent right cell 32, the user transmits in accordance with the specified signal is a discrete time, that is, after the lower honeycomb 32 completed the transfer, and in the next upper cell 32, the user transmits in accordance with the specified signal discrete time, i.e. after the adjacent right cell 32 has completed the transfer, and so forth, so that each sector in each cell performs transmission at different times. However, according to the present invention due to the use of quadrature phase shift keying (Kfmn) and the reduced diameter of each cell, as described in more detail below, do not require any separation hundred 32, no use mdvr between the frames, see Fig.7.
In alternative embodiments of the present invention in each cell 32 may be provided three sectors 34, resulting used in such sauté method of multiplexing time division channels will be based on duhadaway configuration (six sectors). When duhadaway configuration given to the Ren one 6 MHz channel, the transmission is one-sixth of the time in each sector; when duhadaway configuration there are two 6 MHz channel, the transmission is carried out one third of the time in each sector, and when duhadaway configuration there are three 6 MHz channel, the transmission goes for half of this time. Of course, changing the configuration hundred and sectors affects the transmission speed, the speed data and the number of users the system can support 10. However, the possibility of joint use of time, for example, in the relationship 1:1, 1:2, 1:3, 1:4, 1:6 etc. allows you to expand the system 10 with a reduced number of frequencies to cover this area. It should be noted that it is possible to use other configurations SOT, sectors and channels in the system 10, without going beyond being or scope of the invention. However, it should also be noted that increasing the number of sectors increases the overall cost of the unit 18 of the base station due to the increase in the number of individual antennas that will be needed in this case, for each block 18 of the base station.
Regardless of the exact location of the cell and the business cycle multiplexing time division channels within the cell in each sector 34 preferably provided for the channel to transmit data packets to increase the time interval for the fishing, called frames. In the system 10 to support bidirectional communication in each sector it is preferable to use full-duplex communication with time division (TDD, DSWR). Each frame is divided into two main parts: the transfer time down the line and the transmission time in the ascending line. The transfer time down the line preferably allows the unit 18 of the base station to transmit on one of the many timeslots 100 downlink, see Fig. Similarly, the transmission time in the ascending line connection preferably allows the blocks 14 OPP broadcast on one of the many timeslots 102 upward. It is preferable to have a variable number of channel intervals 100 descending line to the number of channel intervals 102 upward, to be able to adapt the speed of passage of the data in the system for the traffic connection of this type. This ratio should preferably be a configurable parameter, but it can be changed during operation if it is not beyond being or scope of the invention.
On each channel interval of the downlink and uplink communication is the transmission of one signal MOCR that the package contains data (modulation MOCR preferable digital spread spectrum, as a digital extension of the military spectrum does not provide enough power for each symbol, which is transmitted on a common frequency; increase capacity to support transmission over long distances leads to expansion (output) signal power outside the assigned frequency band). It is preferable to have the ability to adjust the duration in time of the total length of the frame on the preferred standard length. However, the duration of each frame may vary from one frame to the next and may be different for different cells and sectors. Note that for security alarm and time/frequency reference for uplink communication transmission downstream of the sector 34 preferably extends over the time limit for transmission on the downlink, even if for a given frame or side frame of data for transmission down the line.
Contact Fig, where each pass down the line preferably contains the package 104 messages descending line, which includes a continuous stream of bytes generated by the host computer 12 or the network 19. Each byte stream begins and ends with a flag 106 length, for example, 1 or 2 bytes that mark the beginning and end of the batch of messages. Between the flags 106 each byte stream preferably includes a 4-byte address of the recipient 108, a 2-byte length field type 110 up to 2K bytes, the data is 112 and a 4-byte cyclic redundancy code (CRC, CEC) 114, which covers the address field 108, the field length/type 110 and the data 112.
In addition, part of the transmission down the line is broken into frames using a Protocol radio link Control media access (MAC) and preferably contains a header field of the frame (LC) 116 and the many fields of channels uplink (SCVL) 118, and field SCVL 118 appear in the transfer down the line at intervals equal to one interval of the descending line. In addition, each character moir descending line starts with the flag of the eight-bit character sequence (FSE) 119, which indicates whether the symbol of the descending line of the header field of the frame 116. Essentially, each character MOCR the package contains data and auxiliary information necessary for demodulation of the symbol; and individual characters MOCR containing a known fixed information to adjust, i.e. the data contained in the symbol, which allow the receiver to receive and capture the frequency at which there is a transfer, not used.
Field 116 of the frame header contains radiates unit 18 of the base station and other information specific to this unit 18 of the base station and for all operations unit of the base station and block (block) 14 OPP that use the block 18 to the base station. The preferred configuration of the field 16 of the frame header provides a total of eight bytes, including: (1) several flags (each size 1 bit) to start superquadra, the end of superquadra and empty symbol; (2) the system identifier 4 bits; (3) the level of transmission power, 4 bits; (4) the address of a block of base station sector/cell, 4 bytes; (5) offset value indicating the number of characters MOCR in part of the frame for downward line, 4 bits; (6) ratio (ratio) multiple use in multiplexing time division channels (e.g., 1:1, 1:2, 1:3 etc), 4 bits, and (7) cyclic redundant code (CEC), 1 bytes.
Box 118 status channel uplink (SCVL) contains information indicating whether the channel interval 102 upward. Box 118 SCVL included in each of the first "n" characters MOCR descending line, where "n" is the number of intervals in the frame upward. If the interval 102 is used, then SCVL 118 contains: (1) radiates unit 14 of the RPF, which uses a specific channel interval 102 ascending line 102; (2) is reserved whether the channel interval 102 upward and to what block 14 OPP he is reserved and (3) other pertinent information to control data channel interval 102 upward. The preferred configuration of the field 118 SCVL provides a total of six bytes, including: (1) the address of the mobile station, 4 bytes; (2) used an interval of 1 bit; (3) confirmed the, 1 bit; (4) interrupt 1 bit; (5) reserve 2 bits; (6) quality of service (QoS), 3 bits, and (7) cyclic redundant code (CEC), 1 bytes.
The address of the mobile station field 118 SCVL usually refers to a block 14 of the RPF, who used this interval 102 in the previous frame. However, he can refer to the block 14 of the RPF, which will use the interval 102 in current/next frame transmission in the ascending line, but may not have previously used the interval 102. Used "interval" refers to the information about whether this interval 102 is available for random access in parts of the current frame transmission unit 14 OPP. "Confirmation" refers to the transfer results in the ascending line in the interval 102 of the preceding frame. Unit 14 OPP need to retransmit any incorrect data block before sending a new data block. "Termination" means that the interval 102 is reserved for the "new" unit 14 OPP in part of the next frame for transmission to the block OPP. "Reserved" bits are not used. "Quality of service" (QoS) refers to the priority interval 102 in the current frame to the transmission unit of the RPF, that is, to transfer the packet random access point in the interval 102 in the current frame transmission upward only users with the specified or higher priority. The CEC before the hat is the same polynomial, used in field 116 of the header frame and covers all other fields 118 in the field SKUL.
A descending line provides control according to the Protocol control access to the transmission medium (UDS) block (or blocks) 14 OPP for transmission on the uplink through the field 118 OPP. OVC provided descending line, preferably uses the UDS Protocol for radio. Specified by the DCP preferably provides a segmented scheme Aloha access, providing users with on-demand access to the radio link between the block 14 of the RPF and the block 18 of the base station, and such access implies an additional reservation intervals for extended messages from block 14 OPP. In the fields 118 SCVL it is preferable to provide data on the quality of service (QoS) management services are allowed access.
A stream of bytes supported for transfer unit 14 OPP or block 18 of the base station on the lower level block diagram figure 9. As shown in the figure, the byte stream is first encoded with direct error correction, which is provided by a block encoder 40 reed/Solomon and convolutional encoder 42. Block encoder 40 reed/Solomon adds the byte parity reed/Solomon, for example 10 byte parity, byte stream, which can be fixed a certain number of byte errors, the example of five byte errors. After the processing in block encoder 40 reed/Solomon byte stream is served in the form of a serial bit stream in the convolutional encoder 42. Convolutional encoder 42 preferably is a convolutional encoder with rate 1/2, which introduces redundancy in the bitstream. Note that the code word reed/Solomon preferably introduced into the convolutional encoder 42 with a length limit of 7, depth 35 and the encoding speed of 0.5. Of course, you can use other values of length restrictions and encoding speed is not beyond being or scope of the invention.
In a preferred embodiment, the byte stream is encoded block by the encoder 40 reed/Solomon and convolutional encoder 42 with rate 1/2 using 672 bearing. In particular, these 672 carriers, which carry the information to be modulated by two bits, providing 1344 bits of data transmitted per symbol. These 1344 bits of data are subjected to convolutional coding with rate 1/2, in order to leave 672 bits of data with random errors when receiving and convolutional decoding by the receiver. 672 bits include 84 bytes of data, which is divided into 74 bytes of data payload to be transmitted, and 10 bytes of error correction with the use of coding reed/Solomon. When receiving 84 bytes of data is error correction based on the coding reed/Solomon (as described below) to correct up to five bytes of data, in which there may be errors that corrects packet error obtained at the reception.
After convolutional encoder 42, the bit stream supplied to the inverter 44 of the signal, which preferably includes a block 46 of the interleaver and block 48 conversion bits into symbols Cfmn" 48. The Converter 44 signals punctuates output bits received from the convolutional encoder with the specified time interval and depth, such as 32 and 42, respectively. Then the values of the bits coded 1/0-1/1, and then demodulated dual bits, such as three unmodulated double bits (0,0), inserted into the center of a bit sequence for forming the General sequence of 675 information dibetou, each of which modulates podengo using quadrature phase manipulation (Kfmn). Zeroing, or pmodulebase" three Central bearing, eliminates the need to save the content to a constant and low-frequency components in the modulated signal, which weakens the structural constraints and facilitates the implementation of the transmitter and receiver.
Use Cfmn - modulation information bearing enables you to optimize cellular system. In particular, the use of Cfmn - modulation carrier provides optimum ratio carrier to noise ratio for a given speed of passing data. Optima is lnoe the ratio of carrier/interference allows you to deploy version of honeycomb structure, where the scheme is applied 1:1 reuse frequency. This allows each cell to use the same six frequencies in satisactory cell. When modulation of higher order requires a larger value of the ratio of carrier to noise ratio, resulting in the need to have more (namely three times or more) frequencies than in the system with Cfmn modulation.
For further clarification please refer to the chart in figure 10, which shows the mutual interference scheme for multiple use with a magnification of 1:1 for honeycomb, which has six sectors of 60° offset 30°where the distance R is equal to 1, measured from the top of the sector. In this scheme, a node X is the main transmitting site. Subscribers who are experiencing the effects of interference are a, b and C. Nodes that may interfere with, are the nodes of T and U. the Cell below and to the right of T and U, also add noise, but to a much lesser extent than T and U. the Levels of interference are as follows (the loss factor on the distribution of A 1/R4used for subsequent analysis):
1. For "And" interferes with T and U. the noise Level is approximately 14,84 dB.
2. For "In" interferes with T and U. the noise Level is approximately 14,84 dB.
3. For "C" interferes with T and U. the noise Level is about a 13.9 dB.
Taking into account diagrams of the radiation pattern is directional antennas Pets additional 2 to 4 dB of protection.
To ensure the value of the frequency error bit (hospital has no facilities)equal to 10-6to exchange signals MOCR using Cfmn required signal-to-noise of only 5dB (SNR) for protection. Satisactory honeycomb provides at least 8 additional dB for interference protection. When using modulation of a higher order, a higher signal-to-noise compared to Cfmn for the same frequency of symbol errors. The following table shows the level of modulation and additional protection is required for modulation of a higher level compared to Cfmn-modulation.
|Modulation||Bit/s/Hz||The transfer rate||Required additional|
|BPSK (binary phase shift keying)||1||2.5 Mbps||0.0 dB||1:1||0,50|
|QPSK quadrature phase shift keying||2||5 Mbit/s||0.0 dB||1:1||1,00|
|16QFM frequency modulated quantization||4||10 Mbit/s||7,0 dB||3:1||0,66|
|64 QAM||6||15 Mbit/s||13,2 dB||5:1||0,60|
|256 QAM||8||20 Mbit/s||to 19.3 dB||7:1||0,57|
The baud rate is given as an example for comparison of different modulation methods. Additional protection is an additional increment SNR required for modulation of a higher order to achieve the same frequency of symbol errors, as in the case Chmn. This additional protection is subject to interference from base stations using the same channels. Levels necessary additional protection is close to or exceeds the limit, available in satisactory cell diagram with multiplicity 1:1, as described earlier. The coefficient of multiple use is the number of channel sets that are necessary to create the schema reusable, capable of providing the desired protection. An approximate calculation shows that with each doubling of order modulation level necessary additional protection increases by three dB. This increase power by 3 dB is converted into a distance signal propagation, which leads to the impossibility of achieving a coefficient of expansion of use of frequency equal to one-to-one, between adjacent cells.
Then can be calculated coefficient of efficiency as the ratio of bit/s/Hz/area in relation to Cfmn. The present invention allows for maximum efficiency, to create a highly efficient cell system for stationary wireless sheep, with MOCR. Of the present invention, it follows that the higher order modulation, the lower the efficiency ratio, when considering the entire cellular network as a whole. Therefore, Cfmn is the optimal modulation method for a system, divided into cells, where it is used the minimum amount of spectrum for a given area in a cellular system. It should also be noted that modulation of higher order will be required signal levels for higher limits of fading due to multipath propagation of the signals.
Continuing to discuss the conditions for maintaining signals and re referring to Fig.9, we can see that the modulation 50, preferably orthogonal frequency division (MOCR), is performed on podenglish Cfmn out of the signal Converter 44. As shown in Fig.9, MOCR 50 preferably includes the following steps. First information between double bits evenly inserted positvely the pilot signal, modulating dobitnie value equal to (1,1); at the top and bottom of a 6 MHz channel is inserted unmodulated protective parsimony and added out-of-band positvely to provide the required total of the lengths of the sequences podskokov, for example 1024 podskokov on the symbol MOCR, see block 52. Further parsimony are randomizing bit sign, see block 54. More specifically, the sequence of podskokov preferably multiplied by a pseudorandom (PRN) sequence to eliminate amplitude peaks due to the nonrandom nature of podskokov data, a pilot signal, protection and out-of-band characters.
The next step when performing MOCR preferably includes performing inverse fast Fourier transform for a new randomized sequence podskokov, see block 56. After this conversion at the beginning of the symbol of the downlink is inserted cyclic prefix/Postfix, see block 58. At the completion of the modulated digital sequence preferably is supplied to the lowpass filter and, if necessary, interpolated to a higher frequency before entering into the d / a Converter, see block 60. Finally, this sequence is sent to d / a Converter 62 and is passed from block 14 OPP or block 18 of the base station via an analog electronic circuit.
MOCR at least partially opposes such influences, both constructive and destructive interference, and phase shift of the signal with multipath propagation. Mnogotochie the second spread - this phenomenon, resulting in radio signals reaching the receiving antenna by two or more paths.
Again refer to Fig, where each pass is in the ascending line of the package contains 120 messages ascending line, which includes a continuous byte stream created by the computer 12, or 19. Each byte stream preferably includes a 4-byte address of the recipient 122, 4-byte address 124 source, a 2-byte field 126 length/type, 60 of 128 bytes of data and 32-bit cyclic redundant code (CEC) 130, which covers both address fields 122 and 124, as well as field 126 length/type, and data 128. Note that for transmission on uplink packet 120 no message is broken into frames, as in the case of transfer down the line, however, assumes a fixed number, for example six, of channel intervals 102 for uplink. The system 10 may be configured to allow any given block 14 OPP to transmit only in one channel interval 102 of the frame for uplink. However, in an alternative embodiment, the system 10 can be configured to have the ability to simultaneously handle multiple messages in the ascending line from a single block 14 OPP until the number of intervals 102 upward on the frame. Thus, under the control of the level In The separate unit 14 OPP can increase its throughput in the ascending line, using two or more intervals 102 ascending line in each frame, if required, up to the number of intervals equal to the total number of all intervals 102 ascending line in the frame.
The byte stream is supported for reception unit 14 OPP or block 18 of the base station at the top level block diagram figure 9. As shown in the diagram, the block 14 OPP or block 18 of the base station receive the analog signal through an analog electronic circuit. Then the analog signal in the analog-to-digital Converter 70. The output signal of the analog-to-digital Converter is sampled and fed into the feedback loop automatic gain control so that the operation mode analog-to-digital Converter is maintained in the linear operating range, see block 72. The output signal of the analog-to-digital Converter also served in the block 74 digital low pass filter (LPF) and decimation, resulting in a digital output signal is subjected to digital processing (DSP) preferably using a matrix of programmable logic elements (PLA) or technology-based specific integrated circuits (SIS), and then filtered in low pass filter. After all these transformations, the signal will be presented in the form of a symbol MOOR.
The next step is treatment of the character MOCR at the completion of the reception of the symbol MOCR removes the cyclic prefix and Postfix, see block 76. Then the received symbol MOCR is subjected to fast Fourier transform, see block 78. Then randomization bits of the sign, see block 80. Coarse synchronization/coarse frequency and precise synchronization/the exact frequency of the symbol MOCR are provided by blocks 82 and 84, respectively.
Coarse synchronization is preferably achieved by comparing the cyclic prefix of the symbol MOCR with the contents of the symbol. In particular, cyclic prefix, which is a repetition of part of the symbol, allows the receiver to implement the autocorrelation function to determine whether the beginning of a symbol in a time interval within a few samples. The receiver can detect character by character, as was made coarse synchronization, by viewing a few of the characters (not you want these characters to have a specific content, this test characters). Coarse frequency preferably is determined using the correlation of the pilot signal. In particular, the receiver performs autocorrelation in the frequency domain on the basis of the pilot signals to determine the carrier frequency of the receiver.
Accurate synchronization of the symbol MOCR preferably is achieved by evaluating the phase of the pilot signals. The pilot signals are transmitted with a known phase, which allows the receiver to use this in advance and the known information to determine the exact location of the start symbol with error less than a small part of the sample. The exact frequency of the symbol MOCR preferably detected from the cyclic prefix. A cyclic prefix is used to set the carrier frequency exactly on the carrier of the transmitter. Once the receiver has performed a coarse synchronization and got the exact frequency you customize each character MOCR for accurate synchronization and coarse frequency that allows the receiver to improve the quality of the definition of a symbol, to increase the reception sensitivity and increase the efficiency of bug fixes.
Then the symbol MOCR is subjected to demodulation, which includes channel alignment by processing the pilot signal, see block 86. After demodulation MOCR are positvely the pilot signal, protection and out-of-band parsimony, then there is a General sequence of information bits dual, each of which is modulated podsinwowa quadrature phase-shift keying (Cfmn), see block 88. Then the characters Cfmn preferably served in the reverse signal Converter 90, which includes a block 92, where the characters Cfmn return bit values 1/0, and block 94, where the bits are subjected to reverse alternation. The reverse signal Converter 90 effectively places the bits in the same order in which they were in the original transmitted signal. The output signal of the inverse conversions the user 90 signal is a serial bit data stream, which is preferably fed into the decoder 96 Viterbi, where the speed of the serial data stream is reduced by half for error correction. Then the output signal from the decoder 96 Viterbi preferably served in the block decoder 98 reed/Solomon, which corrects the remaining errors in the received data stream.
Then the data flow upward arrives at the check based on a cyclic redundancy code (CEC) in block 18 of the base station. Check the CEC is a way of detecting errors during data transfer, which is used to ensure accurate forwarding of the data packet. The CEC is the result of a calculation on a set of transmitted bits that the transmitter, for example the block 14 of the RPF added to the data packet, as described earlier in relation to the transfer upward. In the receiver, for example in block 18 of the base station, this calculation is repeated and the results are compared with the encoded value. The calculations are performed in such a way as to optimize the detection of errors. If you check the CEC gives a positive result, then the data packet is processed. If you check the CEC gives a negative result, then the data packet is not allowed to further processing, as if he wasn't adopted by the unit 18 to the base station.
In light of the above, it is obvious that staz is opened wireless system 10 access according to the present invention is able to provide maximum operator performance multi-channel multilateral communication system (MMCs) and user's bandwidth on the spectrum, and maximizing the network does not present great difficulties from both the base station and the user. More specifically, the system 10 can support a higher throughput than other existing wireless systems that is determined by the speed of data per user. As for the user, he can perform a full installation unit 14 OPP using a simple Ethernet connector, it does not need to register with the FCC. In addition, subdivided into cells and sectors in the block structure 18 of the base station allows full reuse of frequencies for the selected set of channels that facilitates network planning and gives you the ability to resize hundred, coordinated with customer density; namely, when a high density of users is preferable to use many small adjacent honeycomb 32, instead of one large cell.
With regard to private implementation of fixed wireless system 10 to access, it is preferable to consider the following: (1) potential end user of the system 10 comes in the store selling electronics at retail to buy the block 14 of the RPF; (2) the retailer provides the end user contract with the service provider in the area that caters to the stationary besprovodnoy the system 10; (3) the end-user communicates with the service provider and provides the service provider with the information necessary to ensure that he was able to connect a specific block 14 OPP end user; and (4) the end-user sets the block 14 OPP, using, as described earlier, the internal antenna, which provides communication with the system 10. The service provider there is no need to send staff to the premises of the end user to install the unit 14 OPP. Of course, you can also use other options for retail sale, if it is not beyond being or scope of the present invention.
Use fixed wireless system 10 access include, but are not limited to the above: (1) high-speed data transmission, such as Internet access (speed digital subscriber line (DSL)services, hosting Web sites (hosting) with remote access, email, extension, local/global (WAN/LAN) network, remote support services management information systems (MIS); (2) communications, such as Internet telephony, voice telephony over Internet Protocol (VoIP) and (3) video technologies such as video conferencing, streaming video (streaming), remote view camera, distance learning, telematici the U.
The present invention may be embodied in other specific forms within being its main characteristics; therefore, the illustrated options should be considered in all respects only as examples and not as limitations, and scope of the invention defined by the attached claims and not the previous description.
1. Fixed wireless regional area network (PC)operating in the frequency range below 10 GHz, containing the set of base stations, each base station provides wireless communication on the basis of the multiplexed orthogonal frequency separation (MOCR) on the set of channels defined in the frequency range for coverage that is unique to the base station and having a radius greater than 1 mile (1.5 km) and less than 10 miles (16 km); and multiple sets of equipment installed at the customer premises (OPP)assigned to each base station and located in the premises in the corresponding area of coverage base station, and each set OPP has the antenna deployed indoors, where the RPF.
2. Stationary wireless PC according to claim 1, in which the base station and sets the RPF used modulation scheme of the signal, which requires protection, providing the value of the signal-to-noise ratio (SNR)less than 10 is B, to achieve frequency error rate (hospital has no facilities)equal to 10-6.
3. Stationary wireless PC according to claim 2, in which the modulation scheme of the signal is a modulation Cpmn (quadrature phase shift keying).
4. Stationary wireless PC according to claim 1, in which the set of channels to the first base station is used multiple times a second base station having a coverage area, adjacent to the coverage area of the first base station.
5. Stationary wireless PC according to claim 1, in which the base station and sets the OPP use scheme ALOHA medium access, which plays the role of facilitator for the many requests on the communication channel set.
6. Stationary wireless PC according to claim 1, in which each base station includes less than 10 oriented sector antennas, each focused on a sector antenna provides wireless communication with a pre-established sector of the coverage area of a base station and in which each focused on a sector antenna uses a different set of channels.
7. Stationary wireless PC according to claim 1, in which the coefficient of efficiency of the wireless communication is at least 0.75 in.
8. Stationary wireless PC according to claim 1, in which the ratio of the radius of coverage multiplied by the speed of the wireless exchange of data and divided by the sweat and the attenuation in the wireless communication, is at least 5.
9. Fixed wireless access system, the containing block of the base station, and the unit of the base station includes a network interface connected to the network, the first wireless interface, allowing radio frequency transmission and reception, and the first switch, where the first switch is capable of switching the information packet from said network unit of the base station and from the block of the base station to the first wireless interface to transmit the information service unit of the base station in the radio frequency and is capable of switching the information packet received in the first radio interface unit of the base station and from the block of the base station in the network; and a unit of equipment in the room user (OPP), and block the RFP includes the interface of the host computer connected to the host computer, the second wireless interface to provide a radio frequency transmission outside the line-of-sight to the unit base station and the wireless reception outside the line of sight from the unit base station and the second switch and the second switch capable of switching the information packet from the host computer at block OPP and from block OPP on the wireless interface to transmit the information packet block OPP on the radio is e, and able to commutate the information packet received in the radio frequency interface unit OPP and from block OPP to the host computer, where the first and second RF interfaces for sending and receiving data packets using multiplexing orthogonal frequency division (MOCR).
10. The system according to claim 9, in which the host computer selected from the group consisting of one main computer and network from multiple host computers.
11. The system according to claim 9, in which the wireless interface is in the range of 2.5-2,686 GHz.
12. The system according to claim 9, in which the network interface and the host computer contain Ethernet interface.
13. The system according to claim 9, further comprising multiple base stations, in which blocks of base stations arranged in accordance with a honeycomb structure in which each of the blocks in the base station emits a signal and the block OPP registered in at least one set of blocks of base stations through radio communication and block OPP determines which set of blocks of base stations it is registered, on the basis of signal quality from a variety of blocks of base stations.
14. The system of item 13, in which after the registration unit of the RPF in one of the many blocks of base stations and after the block of the base station, which was zaregistrirovan block OPP, loses signal quality, block OPP looking for a new block of the multiple blocks of base stations based on the signal quality and is logged in.
15. System 14, in which after the registration unit of the RPF in the new unit set of blocks of base stations block OPP sends the address of the host computer connected to the unit OPP, specified in one unit of the base station.
16. System 14, in which after the registration unit of the RPF in the new unit set of blocks of base stations specified new unit set of blocks of base stations causes the update unit of the base station, which has been previously registered with the specified block OPP, resulting in the previous block of the base station is notified of the new registration of the specified block OPP.
17. Wireless access system including multiple base stations, where the blocks of base stations are arranged in accordance with a cellular structure, and where each block of the multiple blocks of base stations can be connected to the network; the unit of the equipment installed at the customer premises (OPP), where the block OPP maintains contact with at least one set of blocks of base stations in the radio frequency and can be connected to the host computer, and after connecting block OPP to the main computer block OPP recognizes the address of the Internet Protocol high level of the level and the physical address low level, related to the specified host computer, by tracking the communication traffic of the specified host computer.
18. System 17, in which the address of the Internet Protocol high level contains the address of the level 3 and in which the physical address low level contains the address of the Ethernet physical layer.
19. System 17, in which the communication graph contains a request address from the host computer connected to a network server and a response from the connected network server.
20. The system according to claim 19, in which the request and response are implemented by Protocol dynamic control of the main computer (DUGC).
21. System 17, in which the block OPP creates and uses a table of addresses of Internet Protocol high-level and physical addresses low level.
22. System 17, in which after connecting block OPP to the main computer unit of the base station learns the address of the Internet Protocol high-level and physical address low-level block OPP and the host computer by tracking traffic connection.
23. System p in which the unit of the base station creates and uses a table of addresses of Internet Protocol high-level and physical addresses low level for a specified block of the RPF and the specified host computer.
24. The system according to item 21, in which the block OPP passes the message on the unit's base camp, the AI just in case, if the specified message is sent to the main computer that is not listed in the table of block OPP.
25. The system according to item 23, in which the unit base station transmits the message in block OPP only if the specified block OPP contained in the block table of the base station.
26. The system according to item 23, in which the unit is a base station capable of performing the function of a mediator Protocol recognition addresses (AKP, PRA) on behalf of the host computer associated with the block OPP.
27. System p, in which the function of a mediator on the RIGHTS of the block of the base station is performed in order to reduce radio traffic.
28. System 17, in which the wireless communication is performed in the range of 2.5-2,686 GHz.
29. Wireless communication system including a transmitter and a receiver in which the transmitter is still transmitting to the receiver the radio frequency and in which the transmitter transmits the multiplexed orthogonal signal with frequency separation (MOCR), with many characters MOOR, where the receiver detects the signal MOCR character by character, and in which many characters MOCR does not contain the test symbol.
30. The system of clause 29, in which the signal MOCR encoded by the encoder reed/Solomon and convolutional encoder with rate 1/2.
31. The system according to item 30, in which the coding reed/Solomon decoded by the receiver and used the SJ receiver for correcting packet errors.
32. The system of clause 29, in which many characters MOCR includes data and information that helps to detect, which is used by the receiver for demodulation MOOR.
33. The system of clause 29, in which the signal MOCR includes a cyclic prefix and the cyclic prefix is used by the receiver to determine the coarse synchronization signal MOOR.
34. System p, in which a cyclic prefix is used by the receiver to determine the exact frequency of the signal MOOR.
35. The system of clause 29, in which many characters MOCR includes parsimony pilot signal, and in which the symbols of the pilot signal used by the receiver to determine the exact synchronization signal MOOR.
36. System p in which parsimony the pilot signal used by the receiver to determine the coarse frequency signal MOOR.
37. The system of clause 29, in which the signal MOCR is performed by the transmitter modulation with orthogonal frequency division multiple podskokov quadrature phase-shift keying (Kfmn).
38. The system of clause 37, in which parsimony Cfmn are the result of the operation of the transmitter, performing Cfmn modulation on the encoded bit stream.
39. The system of clause 37, in which Cfmn modulation cell deployment receiver and transmitter, which uses scheme mnogokrat the CSOs use frequency 1:1.
40. System § 38, in which the encoded bit stream includes many zero Central bit.
41. The system of clause 29, in which the transmitter is chosen from the group consisting of a block of a base station and a block of computer equipment installed in the premises (OPP), and the receiver is chosen from the group consisting of a block of a base station and block OPP.
42. Wireless communication system, containing the first transceiver and the second transceiver, in which the first and second transceivers communicate via RF terrestrial line, allowing you to perform both transmission and upward communication, and transfer down the line, use the modulation based on the multiplexing frequency division (MOCR) between the first and second transceivers, and in which transfer down the line is split into frames, and when passing upward splitting into frames is not performed.
43. System § 42, in which the essential line is set via the control Protocol media access (UDS).
44. The system according to item 43, in which the Protocol UDS provides the medium access scheme ALOHA using intervals with intervals implicit reservation message with the transfer of more than one interval information with useful data.
45. System § 42, the cat is Roy frame transfer down the line includes box, selected from the group consisting of the address field of the destination field of the frame header and status fields of the channel upward.
46. System § 42, in which the transfer in the ascending line presents a fixed number of intervals ascending line.
47. System § 45, in which the status field of the channel ascending line includes quality of service (QoS).
48. System § 42, in which the transmission in the ascending line and transfer down the line are duplex time division.
49. System p in which transmission on uplink transmitted on multiple intervals ascending line, and transfer down the line is transmitted to the set interval of the descending line is AC the ratio of the intervals of the descending line to the intervals ascending line.
50. Communication between computer equipment installed in the premises (OPP), and many blocks of base stations, comprising stages: installation, user block, OPP to connect to the host computer located in the room, and the block OPP is entirely indoors; automatic registration in one of the blocks of the base stations through radio communications after the block OPP installed by the user.
51. The method according to item 50, in which the registration is based on the signal quality, emitted by the unit of the base station.
52. The method according to item 50, further comprising determining the specified block of the base station whether it is appropriate registration unit of the RPF in the specified block of the base station.
53. The method according to paragraph 52, further including the denial or confirmation unit of the base station registration in it block OPP.
54. The method according to item 50, in which the block OPP connected to multiple host computers and in which after the registration unit of the RPF in one of the many blocks of base stations block OPP sends the addresses of the host computers connected to the block of the RPF to the specified base station.
55. The method according to item 54, in which the host computer selected from the group consisting of one main computer and network from multiple host computers.
56. The method according to § 55, in which the block OPP connected to multiple host computers through the Ethernet connection.
57. The method according to item 50, in which the wireless communication is performed at a frequency below 10 GHz.
58. Wireless cellular system containing a block of computer equipment installed in the premises (OPP), and multiple base stations, in which the block OPP maintains contact with at least one set of blocks of base stations via a modulated radio frequency signal, where the blocks of base stations located in a cell configurations is and where the ratio of the maximum radius of a cell in a cellular configuration to order modulation is at least two.
59. Fixed wireless system that contains many units of computer equipment installed in the premises (OPP), and multiple base stations, each set of blocks OPP supports communication with at least one set of blocks of base stations in the radio frequency and where many blocks OPP and multiple base stations are located in the configuration, divided into sectors, where each sector has up to 250 units of the RPF and where each sector has a radius of at least 10 miles (16 km).
60. System p, in which the cell is broken into sectors configuration.
61. System p in which cell configuration includes six sectors per cell.
62. System p where in the cell configuration scheme is applied multiple-use 1:1.
FIELD: communications engineering.
SUBSTANCE: proposed band selection method for mobile orthogonal frequency division multiple access communication system includes following steps to classify procedures of band selection between sending end and receiving ends with respect to original band selection process, passband width selection process, and periodic band selection process: determination of source band selection code (SC)number for source band selection process; SC number to request passband width for passband width request selection process and periodic SC number for periodic band selection process; determination of periodic SC deferment value in compliance with periodic SC number, and transmission of source SCs, passband width request SC, periodic SCs, and periodic SC deferment values on receiving ends.
EFFECT: minimized time for band selection access.
22 cl, 3 dwg, 4 tbl
FIELD: data package transmission in mobile communication lines.
SUBSTANCE: device for controlling data package transmission in mobile communication line, which has base receiving-transmitting system (RTS) provided with buffer for storing data packages to be transmitted to mobile station, has base station controller (BSC) for comparing size of RTS buffer with number of non-transmitted data packages after data packages are received from common use data transmission commutated circuit (CUDTCC). Non-transmitted packages have to be packages which have been transmitted from BSC to RTS but still haven't been transmitted from BSC to RTS. Transmission of data packages is performed if size of buffer exceeds number of non-transmitted data packages.
EFFECT: prevention of overflow of internal buffer of base receiving-transmitting system; prevention of efficiency decrease caused by next cycle of data package transmission.
19 cl, 15 dwg
FIELD: mobile communications industry.
SUBSTANCE: in asynchronous CDMA mobile communication system, supporting high-speed packet access along descending radio communication line, to provide power for high-speed shared-use physical descending communication line channel (HS-PDSCH) power displacement is determined, which is sent to node B and client equipment, for which purpose power displacement for HS-PDSCH is determined at main controller of radio network and assembly B, after that it is sent to client equipment and assembly B.
EFFECT: higher productiveness.
SUBSTANCE: method can be used in cellular communication systems for finding location of mobile station. Maximal precision of location is achieved at minimal total energy of signals transmitted during location procedure. Correction of errors is provided which errors relate to absence of signal propagation direct beam. Decision of location completeness is made upon forming estimation of coordinates of mobile station. For the purpose the data is used which are available at any base station immediately after reception of location signal as well as estimations of coordinates formed later. Moreover, step of correction of measured times of arrival of location signal is introduced to correct errors. Correction is based upon detecting of absence of propagation direct beam and on subtracting value of compensation being proportional to average radius r of area of objects of dissipation close to mobile station.
EFFECT: increased precision.
5 cl, 8 dwg
FIELD: radio communications.
SUBSTANCE: in each cell radio-signals of transmitters of base station system thereof cover at least two zones, one of which is inner zone, placed inside contour of radio-covering of cell and one into another, with zone contours, quasi-similar to contour of cell radio-covering, without any mutual intersections, while each zone is covered by radio-signals of radio-frequencies, selected for this zone, and also priority access for subscribers being in inner zone is provided, especially to radio-frequencies, assigned for servicing inner zone. Transceivers receive and transmit radio-signals, providing for radio-covering of inner zone, close to circular, at least one assigned radio-frequency and sector-wise radio-covering of outer zone at other radio-frequencies, assigned for servicing each sector.
EFFECT: higher capacity of mobile communications, frequency resource savings, decreased system interferences, guaranteed electromagnetic compliance with radio-electronic means of other communication systems.
3 cl, 4 dwg, 1 tbl
FIELD: radio communications technologies.
SUBSTANCE: base stations with given effective distances are positioned at vertices of conventional nodes, densely covering maintained territory. Radio-signal, received from moveable object, at base stations, which are considered first, is transmitted from these base stations to second base stations and further relay-wise to next base stations located within effective distances of previous base stations. Transmissions of radio signals are provided for within given frequencies spectrum, while previous and following base stations implement radio signals relay in non-overlapping given frequencies bands.
EFFECT: simplified implementation of said method.
2 cl, 12 dwg, 1 tbl
FIELD: radio communications technologies.
SUBSTANCE: base stations are positioned with given mathematical expectation and dispersion of distance between closest base stations in vertices of conventional nodes, densely covering maintained territory. Radio-signal, received from moveable object at base stations, which are considered first, is transmitted from these base stations to second base stations and further relay-wise to following base stations, being within effective distances of previous base stations. Transmissions of radio-signals is provided for within given frequencies spectrum, while following and previous base stations perform radio signals transmissions in non-overlapping frequency bands.
EFFECT: simplified implementation of method.
2 cl, 12 dwg, 1 tbl, 2 ex
FIELD: mobile communications.
SUBSTANCE: control block generates data in frames during data transfer, and adjustment module adjusts size of frames prior to detection of the fact that second cell of multiple cells is a candidate for new choice selection.
EFFECT: higher efficiency.
3 cl, 7 dwg
FIELD: mobile communications.
SUBSTANCE: method includes stages: (A) identification of at least one portion of time frame in direct communication line, while this identified frame portion has available data capacity fro transfer of at least portion of at least one non-planned before traffic flow in addition to any traffic flows, previously planned for transfer along direct communications line and (B) concurrent transfer of previously planned traffic flows and portion of previously not planned traffic flow during identification portion of frame, while total power, assigned for planned and not planned traffic flows does not exceed maximal limit of power.
EFFECT: maximized use of accessible power.
7 cl, 9 dwg
FIELD: radio communications.
SUBSTANCE: method includes registering spectrum grams Fi of radio signals in i-numbered points of flight trajectory in frequencies band, including frequency signals with several transmitters in each one, with onboard computer and position measuring means. Spectrum gram of total power of transmitter signal of each j-numbered frequency channel is separated from Fi and powers Mij of these total signals are determined.
EFFECT: higher safety.
3 cl, 3 dwg, 1 tbl
FIELD: mobile communications.
SUBSTANCE: power controller, placed between filters, generating common-mode and quadratic channels pulses, and frequency transformer, during each selection period calculates compensation signals for pulses of signals, which increase relation of top power to average power; by means of said pulse generating filters among compensation signals it filters out compensation signals having higher level and combines compensation signals having passed filtering stage with source signals. In such a way, spectrum expansion beyond limits of signals frequencies band is suppressed. In case of a system, supporting numerous assigned frequencies, adjustment of relation of top power to average power is performed for each assigned frequency according to its maintenance category.
EFFECT: higher efficiency.
4 cl, 19 dwg
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