JPH11506586A - Apparatus and method for controlling transmission power and transmission rate of wireless communication system - Google Patents

Abstract

SUMMARY A wireless communication system (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). The wireless communication system (1) operates in one of three operation modes. In the acquisition mode during the establishment of the downlink communication path, the downlink signal (212) is transmitted at a high power level and a low transmission rate by a receiver (202) operating at a low transmission rate. In the standby mode after the establishment of the downlink communication path, the downlink signal (212) is transmitted at a low power level and a low transmission rate by the receiver (202) operating at the low transmission rate. In a traffic mode when there is a request for wireless communication transmission, the downlink signal (212) is transmitted at a high power level and a high transmission rate by a receiver (202) that adjusts to operate at a high transmission rate. Upon completion of the wireless communication transmission, the wireless communication system (1) returns to the standby mode and the receiver (202) adjusts to operate at a low transmission rate.

Description

DETAILED DESCRIPTION OF THE INVENTION Device for controlling transmission power and transmission speed of wireless communication system               And method TECHNICAL FIELD OF THE INVENTION   The present invention relates generally to communication systems, and more particularly to communication in wireless communication systems. An apparatus and method for establishing and maintaining a communication path. Background of the Invention   Wireless communication systems send information in radio frequency signals in a network deployment Or you need a transmitter and receiver to receive. These transmitters and receivers It may be subject to interference from other transmitters and receivers inside and outside the network arrangement. Such interference is caused by each transmitter operating at a different transmit power level. Sometimes. Transmitter power control is performed only by each transmitter. It was not something that was done from a centralized place. In addition, wireless communication systems The transmitter power of one transmitter is the transmitter power of the other transmitters in the system. , It was difficult to control. Therefore, each transmitter of the wireless communication system It is desirable to be able to better control the transmit power of the.   Also, to perform wireless communication transmissions, the wireless communication system must A wireless link must be created between the receivers. Link by each radio Interference and delay occur in establishing and establishing Wireless link every time you start a call Making and establishing is inefficient. Whether or not there is a call Maintaining a wireless link requires power to maintain that wireless link. Therefore, another problem of interference arises. Therefore, establish a wireless link for each call And maintain the wireless link while maintaining It is desirable to avoid interference.   In addition, a typical transmitter transmits a signal of one phase and a typical receiver is different Receive the phase signal. The difference between the phases used by the transmitter and receiver in the system is that Cause problems in recognizing information coming from multiple pairs of transmitters and receivers There is. Further, if a receiver operating in one phase is operating in a different phase, Huge amount of circuitry and software needed to identify information from transmitters And In addition, the phase difference between the receiver and the transmitter is Is affected by changes in the delay of the Therefore, signals at radio frequencies To improve transmission, the phase of the transmitter and receiver in a wireless communication system can be controlled. Is desirable.   The source and destination transmitters send information in a certain phase, and the destination and source receivers You may receive information out of phase. In such cases, what part of the data sequence The receiver does not know whether the receiving process has started from. Information divided into frames In order to process that information accurately, the start of each frame must be known. I have to. Traditional techniques for arranging information in frames are cumbersome, Identifying the system is slow and you may lose frames of information. Therefore, appropriate processing It is desirable to be able to identify the beginning of each information frame quickly and easily to perform New Summary of the Invention   According to one aspect of the present invention, the transmission power at a subscriber terminal of a wireless communication system is reduced. A method of controlling is proposed. It has the disadvantages and disadvantages associated with traditional wireless systems. And to substantially eliminate or reduce problems.   According to an embodiment of the present invention, the transmission power at a subscriber terminal of a wireless communication system is reduced. Is a method of controlling, which downloads from the central terminal transmitter to the subscriber terminal receiver. Link communication path is established. The downlink signal is the transmitter of the central terminal And received by the receiver of the subscriber terminal. The downlink signal is output Power control signal, which adjusts the transmitter power of the transmitter at the subscriber terminal Communication between the transmitter at the subscriber terminal and the receiver at the central terminal. Establish the uplink communication path.   One technical advantage of this feature of the present invention is that the transmitter of the transmitter at the subscriber terminal That the power can be controlled externally. Another technical advantage is subscribing from a central terminal Transmission power through the overhead channel of the signal downlinked to the user terminal. You can control it. Yet another technical advantage is the transmission of the transmitter at the subscriber terminal. It can be adjusted by increasing or decreasing the transmission power. Still other technical Benefits match the transmit power of other subscriber terminals served by the central terminal That is, the transmission power can be adjusted in such a manner.   According to another feature of the present invention, a transmitter located at a subscriber terminal of a wireless communication system is identified. The present invention provides an apparatus and a method for establishing It is a disadvantage associated with traditional wireless communication technology. It substantially eliminates or reduces the benefits and problems.   According to an embodiment of the present invention, the transmitter at the subscriber terminal of the wireless communication system The method is to establish a downlink communication path from the central terminal to the subscriber terminal. And The downlink signal is transmitted from a transmitter at the central terminal, It is received by the receiver at the subscriber terminal. The receiver of the subscriber terminal transmits the downlink signal. Extract the code of the synchronization signal from the signal. The code of the synchronization signal is Used to adjust the phase of the uplink signal transmitted from the transmitter at. The receiver of the central terminal monitors the phase of the uplink signal and copies the synchronization signal. The phase of the uplink signal to the phase at the receiver of the central terminal. Match.   One technical advantage of this feature of the present invention is that the transmitter position at the subscriber terminal is The ability to adjust the phase from a distance. Another technical advantage is that the The transmission phase of the transceiver can be matched to the receiver of the central terminal. Further Another technical advantage is that the transmitter phase at the subscriber terminal is adjusted by increasing the transmission phase. The synchronization signal code in the downlink signal transmitted from the central terminal. It is to be embedded. Yet another technical advantage is that the phase of the receiver at the central terminal is Continuous monitoring of the transmitter phase of the transmitter at the subscriber terminal to maintain the match What you can do.   According to another feature of the present invention, transmitting and receiving information in a wireless communication system Apparatus and / or method. It is associated with traditional wireless communication technology It substantially eliminates or reduces the disadvantages and problems.   According to an embodiment of the present invention, a method for transmitting information in a wireless communication system comprises: In the acquisition mode, the downlink signal is transmitted at the first transmission power at the first transmission speed. Including, in transmitting, establishing a downlink communication path by transmitting . After the downlink communication path is established, in standby mode, the downlink signal The signal is transmitted at a second transmission power and at a first transmission rate. When you call a wireless phone The downlink signal is transmitted at the first transmission power and at the second transmission rate .   One technical advantage of this feature of the invention is that different transmission powers and different transmission rates Is to have many operation modes. Another technical advantage is the system In the idle state, it has a small transmission power and a small transmission speed. Further Another technical advantage is that it effectively switches between different transmission powers and different transmission rates. That is what you can do.   According to another feature of the present invention, a downlink communication path in a wireless communication system An apparatus and / or method for establishing It is based on traditional wireless communication technology It substantially eliminates or reduces the associated disadvantages and problems.   According to an embodiment of the present invention, a downlink communication path in a wireless communication system The method for establishing the master code sequence is to have the master code sequence from the transmitter at the central terminal. Transmitting downlink signals. The downlink signal is It is received at a receiver at the subscriber terminal having a slave code sequence. Subscriber The receiver at the terminal converts the slave code sequence into the downlink signal See the code and phase match compared to the target code sequence. Its receiver Adjusts the phase of its slave code sequence to match the phase of the master code. The delay of the path from the transmitter at the central terminal to the receiver at the subscriber terminal Decide.   One technical advantage of this feature of the invention is that the receiver slave code sequence To the master code sequence of the downlink signal. other The technical advantage is to adjust the phase of the receiver's slave code sequence to This is to match the phase of the master code sequence of the link signal. Still others The technical advantage of this is that the phase of the slave code sequence at the receiver is fine or coarse. Is to make additional adjustments. Yet another technical advantage is the slave code sequence. Code sequence corresponding to the combined output level of the To match the sequence.   According to another feature of the invention, information is framed in a wireless communication system. An apparatus and / or method for aligning is provided. It is a technique to line up with the conventional frame Substantially eliminates or reduces the disadvantages and problems associated with surgery .   According to an embodiment of the present invention, information is framed in a wireless communication system. The method of arranging is the downlink signal carrying information transmitted by the transmitter at the central terminal. Receiving at the receiver of the subscriber terminal. As a frame of information , The beginning of the frame position is identified from the downlink signal. Fret Frame position of consecutive information frames to ensure the accuracy of the alignment Is specified at the beginning. Two consecutive first frames at the frame position When the handset is successfully identified, the download from the central terminal transmitter to the subscriber terminal receiver is performed. Downlink communication path is established.   One technical advantage of this feature of the present invention is that the frame for information frame Being able to pinpoint the exact beginning of the position. Another technical advantage is the Dow The bit position of the link signal from one to the next, and It is to identify the place. Yet another technical advantage is that downlink signal Frame indicating the beginning of the frame position in the Decoding the words that line up Yet another technical advantage is that ordered information Continuous monitoring of the beginning of a frame position for a frame You. BRIEF DESCRIPTION OF THE FIGURES   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. This is just This is an example. Here, like reference numerals are used for like parts. FIG. 1 is an overall view of a case of a wireless communication system including a case of the present invention. FIG. 2 is an explanatory diagram of an example of a subscriber terminal of the communication system of FIG. FIG. 3 is an explanatory diagram of an example of a central terminal of the communication system of FIG. FIG. 3A is an explanatory diagram of a modem shelf of a central terminal of the communication system of FIG. FIG. 4 is an explanation of an example of a frequency plan used for the communication system of FIG. 5A and 5B show possible arrangements of cells for use in the communication system of FIG. FIG. FIG. 6 shows the characteristics of the code division multiplexing system used in the communication system of FIG. FIG. FIG. 7 is a diagram showing a signal transmission processing stage used in the communication system of FIG. . FIG. 8 is a diagram showing a signal reception processing stage used in the communication system of FIG. . FIG. 9 shows downlink and uplink communication paths used for a wireless communication system. FIG. FIG. 10 is a diagram illustrating a structure of a downlink signal transmitted from the central terminal. You. FIG. 11 shows the phase adjustment for the slave code sequence of the subscriber terminal. FIG. FIG. 12 shows an overview of signal quality performed at the receiver in the subscriber terminal. FIG. FIG. 13 is a diagram showing the contents of the information frame signal in the downlink signal. You. FIG. 14 is a chart of overhead insertion into a data stream of a downlink signal. FIG. 15 is a chart of an output control signal of an overhead channel of a downlink signal. You. FIG. 16 shows a code synchronization signal in an overhead channel of a downlink signal. FIG. FIG. 17 shows transmission power and transmission speed for each operation mode of the wireless communication system. FIG. FIG. 18 is a diagram showing operations of the receiver and the transmitter in the subscriber terminal. Detailed description of the invention   FIG. 1 is an overall view of an example of a wireless communication system. This communication system is one Or more service areas 12, 14 and 16, each of which has The region has a wireless link with the subscriber terminal (ST) 20 in the region concerned. The service of each central terminal (CT) 10 is received. Center edge The area covered by end 10 can be changed. For example, low subscriber density In rural areas, the service area 12 covers an area with a radius of 15-20 km I can do it. Service area in urban environment with high density of subscriber terminals 20 14 may only cover an area on the order of a 100 meter radius. Subscriber end In a suburban area with a medium density, the service area 16 has a radius of 1 km. Might cover the area of the leader. Land covered by a specific central terminal 10 Regions are subject to local conditions such as future and actual subscriber densities and local geographical conditions. Is not limited to the case shown in Fig. 1. You will understand. Furthermore, the area to be covered does not need to be a circle, and the Antenna design that may affect It is no longer a circle.   The central terminal 10 of each service area 12, 14, 16 has links 13, 15, and 1 7 can be tied together. The link is, for example, a public telephone exchange Network (PSTN). The links are copper, fiber optic, It can be a conventional telephone communication technology using satellite, microwave and the like.   The wireless communication system of FIG. 1 is located within a service area (eg, 12, 14, 16). A fixed matrix between the subscriber terminal 20 at the fixed location and the central terminal 10 in the area. It is based on providing a microwave link. In a preferred embodiment Each subscriber terminal 20 has a permanent fixed access link with its central terminal 10. have. But another alternative is to have access on demand. The number of subscribers who can Link may be exceeded.   FIG. 2 shows an example of the arrangement of subscriber terminals 20 for the communication system of FIG. I have. FIG. 2 shows a customer building 22. Customer Radio Unit (CRU) 24 Is located in the customer's building. Customer wireless unit 24 is a flat panel antenna Or it has a similar one 23. The customer radio unit is located on the customer building Is located on the mast, where the customer radio unit 24 is located. In the direction 26 of the central terminal 10 to the service area The flat panel antenna 23 is placed so as to face.   The customer radio unit 24 is connected to the power in the customer building via a drop line 28. It is connected to a supply unit (PSU) 30. The power supply unit 30 has no customer To power the line unit 24 and the network terminal unit (NTU) 32. Connected to its local power source. The customer wireless unit 24 is a power supply unit. It is also connected to the network terminal unit 32 via the In the customer premises, for example, one or more telephones 34, facsimile 36 and a computer 38 such as a telephone communication device. The telephone communication equipment It is shown as being in one customer's building. But it is like that No need. The subscriber terminal 20 preferably supports only one or two lines. And the two subscriber lines are supported by only one subscriber terminal 20 Can be done. The subscriber terminal 20 also supports analog and digital telephone communications. Can be ported. For example, 16, 32 or 64k bits / S analog communication and digital communication based on the ISDN BRA standard.   FIG. 3 is a diagram illustrating an example of a central terminal of the communication system of FIG. Common equipment 40 has a number of equipment shelves 42, 44, 46, which are RF couplers and Power amplifier shelf (RFC) 42, power supply shelf (PS) 44 and many (4 in this example) Modem shelves (MS) 46. The RF coupler shelf 42 has four modems. The shelves 46 can work in parallel. It is the output of four transmission signals, Are from each one of the four modem shelves, but combine and amplify You. Also, the received signal is amplified and divided into four signals. The split signal is Informed to each modem shelf. The power supply shelf 44 is a seed in the common equipment rack 40. Each device connects to its local power source and becomes a fuse. RF coupler The shelf 42 and the main antenna 5 of the central terminal attached to the mast 50 of the central terminal 2, it is typically an omnidirectional antenna, but with a two-way coupling You.   This example of the central terminal 10 is via a location-to-location microwave link, The connection with the location relayed to the public telephone exchange network 18 shown in FIG. Have been broken. As mentioned above, the central terminal 10 is connected to the public telephone exchange network 18. Other types of coupling (eg, copper wire or optical fiber) to link to Can be used. In this example, the modem shelf is connected to the microphone via line 47 Low-frequency terminal (MT) 48. To public telephone exchange network 18 As the main connection between the location attached to the mast 50 from the microwave terminal 48 A microwave link 49 extends to the microwave antenna 54 at the place. ing.   A personal controller as a site controller (SC) 56 supporting the central terminal 10 Computers and workstations are used. Site controller 56 Are connected to each modem shelf of the central terminal 10 via, for example, an RS232 connection 55. Have been broken. This site controller 56 is responsible for the failure, warning and status of central terminal 10. Can perform support functions, such as locating and indicating locations . A typical site controller 56 supports only one central terminal 10 However, a plurality of site controllers 56 are networked to form a plurality of central terminals. It is also possible to support terminal 10.   As an alternative to RS232 extending to site controller 56, 2 The data link (shown by the dotted line in FIG. To the switching node 60 of the element manager (EM) 58 Can be. Element managers 58 are each coupled to a switching node 60 Many distributed central terminals 10 can be supported. Elemen The manager 58 can potentially be many (eg, up to 1000 or more). Central terminal 10 can be integrated into the management network You. Element manager 58 is located around the powerful workstation 62 Many computer terminals 64 have been used for network engineers and control personnel. Can be installed in   FIG. 3A shows various portions of the modem shelf 46. Transmission / reception RF module Knit (RFU-attached, for example, to a card on the modem shelf) 66 Generates a transmit RF signal modulated at a moderate power level and transmits Recover and amplify the subband RF signal. This RF unit 66 is an analog car (AN) 68, which is connected to a modem card (MC) 70 AD / DA conversion, baseband filtering and vector sum Do what you take. This analog unit 68 has many (typically one to eight) It is connected to the modem card 70. The modem card is sent to the subscriber terminal 20 and And performs baseband signal processing of the transmission and reception signals from. This is The convolutional code of 1/2 rate is added and the CDMA code is used. 16x expansion and reduction of the synchronization recovery and expansion of the received signal And correct errors. In this example, each modem card 70 has two modems Each modem has one subscriber link (or two Line) support. In this way, two modems per card Up to 16 modem shelves with 8 modems per modem shelf Subscriber links can be supported. However, when a failure occurs Up to 15 subscribers because they will be duplicated so that the modem can be replaced by a third party link Link is preferably supported by one modem shelf 46. Then 1 The sixth modem is used as a spare, and one of the other 15 modems Be able to switch when it breaks down. The modem card 70 is Knit (TU) 74, which is the main network 18 of the public telephone exchange (Eg, via one of the lines 47) For example via up to 15 subscriber terminals (via each one of 15 out of 16 modems) Deal with signal processing of telephone information.   Wireless telephone communication between the central terminal 10 and the subscriber terminals 20 may be performed at various frequencies. Can be. FIG. 4 shows one example of frequencies that can be used. In this example The wireless communication system is intended to work in the 1.5-2.5 GHz band. I have. In particular, in this example, the ITU-R (CCIR) Recommendation F. Determined by 701 Working in the bandwidth (2025-2110MHz, 2200-2290MHz) Is intended. FIG. 4 shows an uplink from the subscriber terminal 20 to the central terminal 10. And the frequency used for the uplink from the central terminal 10 to the subscriber terminal 20. Is shown. 12 uplinks and 12 downlinks 3.5M each Hz radio channel is provided around 2155 MHz Will be. Transmit and receive channel gap is 70 MHz, the minimum required gap Is over.   In this example, as described above, each modem shelf has one frequency channel ( That is, one uplink frequency plus the corresponding downlink frequency) is supported. Port. As will be explained later, up to 15 subscriber links can Can be supported on several channels. Thus, in this embodiment, Each central terminal 10 supports 60 links or 120 lines can do.   Typically, radio communication from a particular central terminal 10 is It can get into the barred area. The problem of interference in neighboring areas In order to avoid or at least reduce Only a limited number are used at a given central terminal 10.   FIG. 5A illustrates the frequency to reduce the problem of interference between adjacent central terminals 10. The numbers are shown as cell type arrangements. In the arrangement shown in FIG. 5A, , The shaded line to the cell 76 indicates the frequency set (FS) for that cell. Three Frequency set (for example, FS1 = F1, F4, F7, F10, FS2 = F2, Select F5, F8, F11 and FS3 = F3, F6, F9, F12) Can avoid interference between neighboring cells, and A row of defined omnidirectional cells can be created. The transmitter of each central terminal 10 has the same Prevent transmission from reaching the nearest cell using the wavenumber set . Thus, each central terminal 10 has four pairs of frequencies (each uplink) within its cell. For each modem shell of the central terminal 10. A channel is associated with each RF channel (channel frequency pair).   Each modem shelf uses one channel frequency (15 subscriptions per channel frequency) Link) and has 4 modem shelves So, each central terminal 10 has 60 subscriber links (ie 120 lines) Can support. The 10 cell arrangement in FIG. 5A is therefore, for example, up to 600 cells. Support ISDN links, ie up to 1200 analog lines Can be. FIG. 5B shows a fan-shaped configuration to reduce the problem between nearby central terminals 10. This shows the cell arrangement type using the cell. Similar to FIG. 5A, FIG. Different types of diagonal lines indicate different frequency sets. As in FIG. 5A, FIG. B has three frequency sets (eg, FS1 = F1, F4, F7, F10, and F S2 = F2, F5, F8, F11 and FS3 = F3, F6, F9, F12 ). However, in FIG. 5B, the cell is a split central terminal (SCT ) 13 which is divided into sectors S1, S2 and Having three central terminals 10, one for S3, S1, S2 and S3 To transmit from each of the three central terminals 10 for the appropriate sector of It has become. This maintains fixed access to each subscriber terminal 20 As it is, the number of subscribers per cell can be tripled.   A repeating pattern of seven cells can be used. There is a certain section Unit works at a given frequency, and all six nearby cells work at the same frequency. PN code. This allows nearby cells to store data Can be prevented from being inadvertently decoded.   As mentioned above, the frequency of each channel can support 15 subscriber links Wear. In this example, this is using code division multiplexed access (CDMA) technology. This can be done by multiplexing the signals. Figure 6 shows the complete CDMA coding and decoding Give body figure.   To encode the CDMA signal, a baseband signal, such as each subscriber link, is used. The user signal to the user at 80-80N is 160 k symbols / sec. Coded to baseband signal. Here, each symbol is two data bits (See, for example, the signal shown at 81). This signal is Uses Walsh pseudo-random noise (PN) code extensions 82-82N The effective chip rate is 2.56M symbols / 3.5MHz at 3.5MHz. Generate a second signal. The signals for each subscriber link are then combined into a radio frequency ( RF) and a number of user channels for transmission from transmit antenna 86. (For example, 85).   During transmission, the transmitted signal may have external interference 89 or interference from other channels 90. And the influence of the interference source 88. Therefore, the CDMA signal is transmitted to the receiving antenna 91. By the time it is received at its many user channel signals as shown at 93 May be distorted.   Decrypt signals received from a number of user channels to a given subscriber link In addition, the Walsh correlators 94-94N need to encode each subscriber link. Each received using the same pseudo random noise (PN) code used Baseband signals 96-96N (eg, as shown at 95) Is extracted. There may be some noise left in the received signal You will understand. However, unnecessary noise is reduced using a low-pass filter and signal processing. Can be removed.   What is important for CDMA is to apply orthogonal codes. It Allows many user signals to be transmitted and received at the same frequency at the same time . When the bit sequence is orthogonally separated using Walsh codes, each subscriber resource The link signal does not interfere with others. A Walsh code is a set of mathematical sequences that serve as an "orthogonalization". You. In other words, multiply one Walsh code with another Walsh code The result is zero.   FIG. 7 is a signal transmission process performed by the subscriber terminal 20 in the communication system of FIG. It is a figure showing a stage. The central terminal also performs a similar signal transmission process. ing. In FIG. 7, an analog signal from one of a pair of telephones is Via the interface 102 to the hybrid audio processing circuit 104. , And a digital signal via the codec 106. It contains control information Is inserted at 108. The completed signal is expanded Before being passed to the stretcher 116, it is processed by the convolutional encoder 110. You. An extender, which is provided by each of the RW code generator 112 and the PN code generator 114. Rademacher-Walsh and PN codes are applied. The resulting signal is transmitted via a digital / analog converter 118. Digital The analog / digital converter 118 converts a digital sample into an analog waveform and This is a stage of band output control. The signal is then low-pass filtered The signal is transmitted to 120 and modulated by the modulator 122. Modulated signal from modulator 122 Is mixed with the signal generated by the voltage controlled oscillator 126, which is the synthesizer 160. Are combined. The output of mixer 128 then passes through bandpass filter 132 Before being amplified by the low noise amplifier 130. Output of bandpass filter 132 The power is further increased by another low noise amplifier 134 before passing through the power control circuit 136. It is width. The output of the power control circuit passes through another bandpass filter 140 Before being further amplified by another low noise amplifier 138 and transmitted from the transmitting antenna 142. Is done.   FIG. 8 is as formed at the subscriber terminal 20 in the communication system of FIG. FIG. 5 is an explanatory diagram showing a reception processing stage of an equivalent signal. The central terminal also has It is formed to execute a signal receiving process. 8, the receiving antenna 150 Are bandpassed before being amplified in the low noise amplifier 154. Filter 152 is passed. The output of amplifier 154 is then connected to another low noise amplifier. Passed through another bandpass filter 156 before being further amplified by 158 . The output of the amplifier 158 is then passed to a mixer 164, where the synthesizer 160 is mixed with the signal generated by voltage controlled oscillator 162 responsive to 160. The output of mixer 164 is then passed to analog-to-digital converter 170 , A demodulator 166 and a low-pass filter 168. A / D converter 170 The digital output is then passed to a collector 178. The collector 178 , The same Rademasher Walsh code and PN code used during transmission Are respectively the RW code generator 172 (corresponding to the RW code generator 112) and Provided by PN code generator 174 (corresponding to PN code generator 114). It is. The output of the collector is supplied to the Viterbi decoder 180. Viterbi decoder The output of 180 is then overheaded to extract overhead channel information. Through the pad extractor 182. The output of overhead extractor 182 is then Through the deck 184 and the hybrid circuit 188. The log signal is passed through a two-wire interface 190 through which the selected telephone 192 is passed. It is.   In the subscriber terminal 20, the automatic gain adjustment stage is inserted into the IF stage. You. The control signal is a digital signal of a CDMA receiver using the output of a signal quality evaluator described later. Obtained from the barrel part.   FIG. 9 shows the downlink and uplink between the central terminal 10 and the subscriber terminal 20. It is a block diagram of a communication path. The downlink communication path is the transmitter in the central terminal 10. 200 to the receiver 202 in the subscriber terminal 20. Uplink The communication path extends from the transmitter 204 in the subscriber terminal 20 to the receiver 206 in the central terminal 10. Established for Downlink and up once in the wireless communication system 1 When the link communication path is established, the first user 208 or the second user User 210, a downlink signal 212 and an uplink signal 214 Telephone communication is performed with a user who is served via the central terminal 10. Dow The link signal 212 is transmitted by the transmitter 200 of the central terminal 10 and transmitted to the subscriber terminal. Received by the receiver 202 at the terminal 20. Uplink signal 214 is at subscriber end Transmitted by the transmitter 204 of the terminal 20 and by the receiver 206 of the central terminal 10. Received. Downlink signal 212 and uplink signal 214 are CDMA Transmitted as a spread spectrum signal.   Receiver 206 and transmitter 200 in central terminal 10 are phase- Synchronized with each other and aligned with respect to information boundaries. Downlink To establish a communication path, the receiver 202 in the subscriber terminal 20 Must be synchronized with the transmitter 200. Synchronization uses the acquisition mode function and By performing the tracking mode function on the downlink signal 212. Done. First, the transmitter 200 in the central terminal 10 transmits the downlink signal 212 Send. FIG. 10 shows the contents of the downlink signal 212. Downlink signal 2 12 is a code sheet for the central terminal 10 coupled to the frame information signal 218. Including the cans signal 216. The code sequence signal 216 is a pseudo random noise code. Code signal 220 and the Rademasher Walsh code signal. Figure 10 is particularly related to the configuration of the downlink signal, but the uplink has a similar configuration. Have.   A respective receiver 2 for each subscriber terminal 20 served by a single central terminal 10 0 operates the same pseudo-random noise code signal as the central terminal 10. Center edge Each modem shelf 46 in terminal 10 has one radio frequency channel and 15 Supporting subscriber terminals 20, each subscriber terminal 20 includes a first user 208 and a second user User 210. Each modem shelf 46 has 16 Raid One of the Lusch code signals 222 is selected. Each Raid Masher Walsh Code signal 222 corresponds to only one subscriber terminal 20. Thus, a particular subscription The subscriber terminal 20 is transmitted by the central terminal 10 and is reserved for a specific subscriber terminal 20. Having the same code sequence signal 216 as the downlink signal 212 There will be.   Downlink signal 212 is received at receiver 202 of subscriber terminal 20. Receiving The device 202 converts the phase and code into the code sequence of the downlink signal 212. Compared with the phase and code in the source signal 216. Central terminal 10 has master code And the subscriber terminal 20 has a slave code sequence. It is thought that. Receiver 202 masters the phase of the slave code sequence. Make incremental adjustments until it is determined that the code sequence matches. The receiver 202 of the entry terminal 20 has the same phase as the transmitter 200 of the central terminal 10. The slave code sequence of the receiver 202 initially includes the central terminal 10 and the subscriber terminal. The master of the transmitter 200 and the central terminal 10 due to the path delay between the Not synchronized with code sequence. This path delay is between the subscriber terminal 20 and The ground between the central terminal 10 and other surrounding technical factors that affect wireless communication. Caused by physical separation.   FIG. 11 shows how the receiver 202 of the subscriber terminal 20 has its slave The phase of the code sequence is determined by the master code sequence of the transmitter 200 of the central terminal 10. Indicates whether to adjust to match the The receiver 202 transmits the downlink signal 21 Slave code sequence through the entire length of the master code sequence in 2 Increments the phase of the slave code sequence. Slave code sequence and master code sequence for each of the major changes Signal quality assessment by performing power measurements on the combined power of decide. The length of the master code sequence is 2.56 MHz chip It is approximately 100 microseconds based on odds. The phase of the slave code sequence is チ ッ プ of the chip period for each incremental period during the acquisition phase Adjusted by the The receiver 202 is at the point where the combined power reaches the maximum When the correlation peak is identified, the first acquisition state is completed. Receiving The transceiver 202 confirms the identification of the maximum value of the coupling power at the peak of the correlation. To complete the second acquisition state through the entire length of the code sequence. The approximate path delay between the subscriber terminal 20 and the central terminal 10 depends on the acquisition mode. Is determined when the position of the correlation peak is identified.   Once the acquisition of the downlink signal 212 is achieved at the receiver 202, the Fine adjustment of the phase of the rave code sequence is To keep the slave code sequence in phase with the slave code sequence. Done in Fine tuning is one chip for the phase of the slave code sequence This is done over a period of one-sixteenth of the period's incremental changes. Definition Adjustment is performed in response to a measurement of the combined power made by receiver 202, In either the positive (positive) or backward (negative) direction. Will be. The receiver 202 is connected to the subscriber terminal 20 for the downlink communication path. Master code sequence to ensure that Monitor continuously.   FIG. 12 shows the receiver 202 during the acquisition mode and the tracking mode. 2 shows a graph of a curve of the coupling power measured. The maximum value of the coupling power is It occurs at peak 219 of the correlation of the power curve. Peak 219 is shown in FIG. Not flattened at the vertices, and more plateau Note that it will be shaped. This is the receiver 202 The code sequence is in phase with the master code sequence of the transmitter 200. It is a coincident point. Measurement of the value of coupling power generated at peak 219 of correlation The result is the incremental code to be made for the slave code sequence. Request adjustment. The window for fine adjustment is fast correlator point 221 and slow It is established between the collector points 223. Measurement of average power is fast Data point 221 and slow correlator point 223. Early Colle Data point 221 and slow correlator point 223 one chip period apart Error signal provides fine adjustment to the phase of the slave code sequence. Fast correlator point 221 and slow correlator used to control It is generated based on the calculation of the difference of the average power of the point 223.   The master code sequence of the code sequence signal 216 in the downlink signal 212 After requesting and initiating tracking at the central terminal 10 for cans, receiving Unit 202 establishes a downlink communication path to establish a frame alignment mode. Enter The receiver 202 recognizes the start of the frame position of the downlink signal 212. To distinguish, the frame in the frame information signal 218 of the downlink signal 212 Analyze information. Receiver 202 converts the data stream of downlink signal 212 Since it does not know at what point it received the information, the receiver 202 In order to process information received from the transmitter 200 of the terminal 10, the frame position You have to look for a start. Once the receiver 202 has opened one other frame position When the start is identified, the transmitter 200 of the central terminal 10 transmits the signal to the receiver 20 of the subscriber terminal 20. 2 is established on the downlink communication path.   FIG. 13 shows the schematic contents of the frame information signal 218. Frame information signal 2 18 is for each frame of information transported via downlink signal 212. For example, the overhead channel 224, the first user channel 226, the second user channel A channel 228 and a signal output channel 230. Overhead channel 224 Carries control information to establish and maintain downlink and uplink communication paths. Send. The first user channel 226 carries traffic information to the first user 208. Used to send. The second user channel 228 is transmitted to the second user 210. Used to transmit physical information. Signal output channel 230 is telephone type Output for supervisory operation of the subscriber terminal 20 for the function of Give information. Overhead channel 224 is the 16 kilobits of information frame / Second, and the first user channel 226 is 64 kilobits / second of a frame of information. And the second user channel 228 occupies 64 kbit / s of the frame of information. Thus, the signal output channel 230 occupies 16 kilobits / second of a frame of information.   FIG. 14 shows how the overhead channel 224 shows how the downlink signal 21 2 is inserted into the second data stream. Downlink signal 212 data The stream is divided into 20-bit subframes. 20-bit subframe Each of the frames has two 10-bit sections. First 10-bit section The options include overhead bits, signal output bits and eight first user bits. No. The second 10-bit section contains overhead bits, signal output bits and It includes eight second user bits. Format of this 20-bit subframe Is repeated throughout the 4 millisecond frame of information. Thus, over The head bits correspond to frames in the data stream of the downlink signal 212. Occupies each tenth bit position of the information.   Overhead channel 224 includes an 8-byte field. That is, the frame Alignment word 232, code synchronization signal 234, power control signal 236, The operation maintenance channel signal 238 is a spare byte field of 4 bytes. H The frame alignment word 232 is a frame for the frame of information to which it corresponds. Identifies the start of a frame position. The code synchronization signal 234 is transmitted from the subscriber terminal 20. Information for controlling the synchronization of the transmitter 204 with the receiver 206 of the central terminal 10 is provided. give. The power control signal 236 controls the transmission power of the transmitter 204 of the subscriber terminal 20. Give information to control. The operation maintenance channel signal 238 indicates the downlink and And the uplink communication path and the path from the central terminal to the subscriber terminal. Operating on the modem shelf between the controller and the modem card. Provides status information related to the path to which the communication protocol is extended.   The reception of the subscriber terminal 20 to identify the start of two consecutive frame positions Unit 202 includes an overhead channel 224 and a frame alignment signal 232 10 possible streams in the data stream of the downlink signal 212 for Search through the slot position. Receiver 202 first transmits to overhead channel 224 The 10-bit section of frame information is used to determine if Extract the first bit position for each option. If the extraction from the first bit position After a predetermined period, the frame alignment signal 232 is identified and If not, receiver 202 determines the second bit position of each 10-bit section. , And for subsequent bit positions, the frame alignment signal 2 This procedure is repeated until 32 is identified. The receiver 202 will look for it An example of the frame alignment signal 232 is a binary number 00001111. Once the correct bit position produces the frame alignment signal 232, the receiver 2 02 seeks to identify the start of two consecutive frame positions. Downlink The communication path is a continuous frame in the data stream of the downlink signal 212. In response to recognition of the frame alignment signal 232, two consecutive frame positions Established based on successful identification of the start.   Receiver 202 may provide a subsequence frame for a subsequence frame of information. Continue monitoring the correct bit position to recognize the frame alignment word 232 I can. If the receiver 202 performs frame alignment on three consecutive frames, If the receiver signal 232 fails to be recognized, then the receiver 202 Frame alignment signal 232 and frame alignment 10 bits before identifying the start of two consecutive frame positions through recognition Return to the search process and cycle through each of the section bit positions. U. Failure to recognize three consecutive frame alignment signals 232 may It will cause a change in the path delay between 10 and the subscriber terminal 20. Receiving The transmitter 202 also transmits from the transmitter 200 of the central terminal 10 to the receiver 2 of the subscriber terminal 20. Returning to the search process based on the interruption in the downlink communication path to There will be.   Acquisition of the downlink communication path also requires the subscriber terminal 20 to use an appropriate modem card. It could be checked to ensure that it was locked in the proper position at 70. The modem card 70 assigned to a particular subscriber terminal 20 can be one of many reasons. Any will cause a situation that will be taken out of service. specific Subscriber terminal 20 will continue to seek signals, and such acquisition will be It may occur in connection with a signal from one of the other modem cards 70 in the central terminal 10. U. A particular subscriber terminal 20 cannot read signals from other modem cards 70 Although it should be eliminated, the specific subscriber terminal 20 is still connected to the other modem card 70. Locked and locked to the appropriate modem card 70 even if it returns to service Will not. Therefore, the acquisition confirmation technique requires a specific subscriber terminal at the central terminal 10. To ensure that terminal 20 is not locked to modem card 70 unrelated to it Used for   Acquisition acknowledgment techniques use a spare byte field 2 in overhead channel 224. 42 is used. The channel identifier field is one of the spare byte fields 242. Occupy one. The channel identification field contains 8 bits. That is, one inverted bit And a 3-bit pseudo-random noise code identifier and a 4-bit raid masker. It is a Walsh code identifier and is in the form of INVPPPRRRR. Huh. The 3-bit pseudo-random noise code identifier is associated with the central terminal 10 Sequence and its associated subscriber terminal 20. 4-bit raid masher -Walsh code identifier is a characteristic associated with one of the fifteen subscriber terminals 20. Corresponds to a fixed code. The channel identifier field indicates that the subscriber terminal 20 is Not establish a communication with the central terminal 10 and the subscriber terminal 20 is not Prevents establishing communication with the incorrect modem card 70 in the central terminal 10.   Downlink through identification of two consecutive frame alignment signals 232 The receiver 202 that has established the communication path also has a channel in the overhead channel 224. Monitor the channel identifier field. Frame alignment occurs, but The downlink communication path unless there is a proper match for the Will not be established. Pseudo random noise code identifier and raid masher Since the Walsh code identifier is constant for each subscriber terminal 20, the Unit 202 has a confusion between the channel identifier field and the frame alignment word. Would avoid. The inverted bit is the channel, as shown in italics above. 1st and 3rd bits of the pseudo-random noise code identifier in the file identifier field Information according to the first and third bits of the Raid Masha-Walsh code identifier. The state changes in each of the information frames. This is because the channel identifier field is To prevent it from being recognized as a word alignment word.   Through phase synchronization and frame alignment of the correct code sequence Based on the establishment of a downlink communication path from the central terminal 10 to the subscriber terminal 20 The wireless communication system 1 receives the central terminal 10 from the transmitter 204 of the subscriber terminal 20. Execute a procedure to establish an uplink communication path to the transceiver 206. First, the transmitter 204 transmits to and from other subscriber terminals in the communication of the central terminal 10. Power to avoid downlink interference until a downlink communication path is established. Has been turned off. After the downlink communication path has been established, The transmission power is transmitted via the power control channel 236 of the overhead channel 224. Is set to the minimum value on the basis of the command from the central terminal CT. Power control Signal 236 controls the amount of transmit power generated by transmitter 204, Terminal 10 is served by central terminal 10 with approximately the same level of transmit power. To be received from each of the subscriber terminals 20.   The power control signal 236 is a frame information signal transmitted via the downlink signal 212. In overhead channel 224 of signal 218, transmitter 200 of central terminal 10 Sent by The receiver 202 of the subscriber terminal 20 receives the downlink signal 212 And extract the power control signal 236 therefrom. The power control signal 236 is The transmission power of the transmitter 204 is supplied to the transmitter 204 of the subscriber terminal 20 and the transmission power of the transmitter 204 is increased. Adjustment is mentorable. The central terminal 10 determines the desired The transmission power of the transmitter 204 is incremented until it falls within the range of a new threshold. Continue to adjust. Adjustments to the transmit power are initially based on the transmit power at the desired threshold. Until within the value range, enter the coarse adjustment mode with 1 dB increment. It is done in. Based on the tuning of the transmitter 204, communication with other subscriber terminals To avoid interference in the communication of the central terminal, the transmit power is adjusted incrementally. Through the adjustment, increase the strength so as to gradually incline.   FIG. 15 shows an example of a decoding scheme for the power control signal 236 . The transmission power of the transmitter 204 of the subscriber terminal 20 has reached a desired threshold range. Later, receiver 206 of central terminal 10 transmits due to changes resulting from power fluctuations. The monitoring of the total transmission power from the transceiver 204 is continued, and the central terminal 10 and the subscriber terminal 2 are monitored. The monitoring of the change of the path delay between 0 and the like is continued. If the transmission power is If the value falls below or exceeds the desired threshold range, the central terminal 10 transmits to the transmitter 20. 4 to increase or decrease the required transmission power as required. A power control signal 236. In this regard, the transmit power should be within the desired threshold range. The adjustment to return to the enclosure is performed in the fine adjustment mode with an increment of 0.1 dB. Will take place in the United States. In the downlink or uplink communication path Based on the interruption, the central terminal 10 may facilitate the re-establishment of an appropriate communication path. First, through the recovery of the parameters stored in the memory of the subscriber terminal 20, It will instruct the transmitter 204 to return to the power level.   Completely establish an uplink communication path from subscriber terminal 20 to central terminal 10 For this reason, the transmitter 204 of the subscriber terminal 20 is synchronized with the receiver 206 of the central terminal 10. Must be done. The central terminal 10 controls the overhead of the frame information signal 218. Synchronization of transmitter 204 via code synchronization signal 234 on channel 224 Control. The code synchronization signal 234 is the master code sequence of the receiver 206. Phase of the slave code sequence of the transmitter 204 to match the phase of the Is adjusted incrementally. Synchronization of transmitter 204 is synchronization of receiver 202 Is executed in a substantially similar manner.   The code synchronization signal 234 is the frame information via the downlink signal 212 In the overhead channel 224 of the signal 218, the transmitter 20 of the central terminal 10 Sent by 0. The receiver 202 of the subscriber terminal 20 transmits the downlink signal 21 2 from which the code synchronization signal 234 is extracted. Code synchronization signal 234 is an incremental value of the phase of the slave code sequence of the transmitter 204. It is supplied to the transmitter 204 for proper adjustment. The central terminal 10 has the receiver 206 Slave code sequence of transmitter 204 and master code sequence of central terminal 10 Until it recognizes a code and phase match with the Continue adjusting the phase of the rave code sequence incrementally.   Receiver 206 determines code and phase match for transmitter 204 synchronization The same power measurement that is performed for the synchronization of the receiver 202. Implement fixed technology. Adjustment of phase of slave code sequence of transmitter 204 First, the receiver 206 communicates with the master code sequence of the transmitter 204 and the slave. Until the position of the maximum power of the combined power with the This is performed in the coarse adjustment mode having an increment of 1/2 of the step speed.   FIG. 16 shows an example of a decoding scheme for the code synchronization signal 234. You. Phase and code for the slave code sequence relative to the master code sequence After the identification and confirmation of the match of the codes, the receiver 206 Slave code of transmitter 204 resulting from variations in path delay between Continue monitoring uplink signal 214 for variations in the phase of the sequence . If further adjustment to the slave 204's slave code sequence is required, If so, the central terminal 10 changes the phase of the slave code sequence of the transmitter 204. Send the appropriate code synchronization signal 2234 to increase or decrease as needed Will. At this point, with respect to the phase of the slave code sequence of the transmitter 204, The adjustment made is a fine adjustment mode with an increment of 1/16 of the chip speed. Will be executed in Interruption in downlink or uplink communication path Based on the central terminal 10, to facilitate the re-establishment of an appropriate communication path, Through the recovery of the parameters stored in the memory of the subscriber terminal 20, the previous slave It will instruct the transmitter 204 to return to the value of the phase of the code sequence.   After synchronization of the transmitter 204 has been achieved, the receiver 206 Frame alignment performed by receiver 202 during path establishment Performs frame alignment on uplink signal 214 in the same manner as I do. Once the receiver 206 recognizes two consecutive frame alignment words Once frame alignment is obtained, an uplink communication path is established. Downlin Transmission of information based on the establishment of both uplink and uplink communication paths, The user connected to the first user 208 or the second user 210 of the terminal 20 and the central terminal 10. Will be initiated with the user.   The wireless communication system 1 has three different system operating modes. Adjust the transmission power level and transmission speed to one of two settings for It is possible to The system operating modes are acquisition, standby and Fick. Adjustment of transmission power and transmission speed may cause interference with other subscriber terminals. It allows compression and minimization. Improvements in link establishment time, and Is achieved. The transmission power level is decoded into a power control signal 236 and transmitted. The transmission speed is decoded into a code synchronization signal 234.   Transmission power for both uplink signal 214 and downlink signal 214 -Normal 0 dB high output level or Reduced -12 dB low output Can be set to any of the levels. Uplink signal 214 and downlink The transmission rate for both signals 214 is as low as 10 kbit / s or 160 It can be set as fast as low bits / sec. High-speed switch of 160 kbit / s User traffic and overhead information, a single information symbol Are spread to result in the transmission of 16 chips. Correlation is 16 Of chips, resulting in a processing gain of 12 dB. 10 kilobits When switched to a low speed of The symbols of the bits are spread so as to result in the transmission of 256 chips. Korele Is performed on 256 chips, resulting in a processing gain of 24 dB. You.   FIG. 17 shows the transmission power for each of the three system operating modes. And transmission speed. Power up or uplink or downlink traffic Whenever the communication path is lost, the wireless communication system 1 enters an acquisition mode. Acquisition mode During transmission, the transmit power of the uplink and downlink transmitters is Is also maximized. This is the noise ratio at the output of the correlator. Signal for both identification and minimum risk of unsuccessful acquisition. Increase the amplification of relation peak 219. In acquisition mode, Since only the buffer information is needed, the transmission speed is as low as 10 kbit / s. is there.   When the downlink and uplink communication paths are obtained, the radio communication system 1 Enters standby mode. In standby mode, downlink and uplink transmissions The transmission power of the transceiver is reduced to 12 dB. This transmission power compression is Minimize interference with other subscriber terminals that maintain synchronization. The transmission speed is Between the central terminal 10 and the subscriber terminal 20 via the The low level is left to allow for changes in control information.   If either an incoming or outgoing call is detected, the user traffic information Message indicating that downlink and uplink communication paths are required for A message is sent from the source terminal to the destination terminal. At this point, the wireless communication system System 1 enters traffic mode. During traffic mode, the Downlink and uplink to facilitate information transmission to and from the trusted terminal The transmission power of the communication path is increased to a high power level and the transmission speed is 160 kilobits. Up to a high speed level of octets / second. Downlink based on call termination detection Message indicating that the uplink and uplink communication paths are no longer needed. Sent from the terminating terminal to another terminal. At this point, the wireless communication system 1 waits again. Enter mode. Code synchronization and frame alignment tracking wait It is executed in both the traffic mode and the traffic mode.   FIG. 18 is a detailed block diagram of the receiver 202 and the transmitter 204 of the subscriber terminal 20. It is. The receiver 202 transmits the downlink signal 21 via the RF reception interface 250. 2 is received. The RF receiving interface 250 converts the spread spectrum signal into I and Q signals. Separate into signal parts. The RF receiving interface 250 is connected to the receiver 202. By removing approximately half of the 5 MHz bandwidth, a portion of the I and Q signals Each of the minutes is passed through a bandpass filter. RF reception interface 250 To reject the image frequency and avoid aliasing, Each of the minutes is passed through a low pass filter. I and Q signal parts are analog digital It is converted into a digital form by the tall converter 252. Analog-to-digital converter 25 The sampling frequency of 2 is four times the chip period, that is, 1 at an 8-bit resolution. 0.24 MHz.   The digital I and Q signal portions are 5.12 Descent to gigahertz speed. Code generator and despreader 256 receive Of the Rademasher Walsh and pseudo-random noise code sequences of machine 202 To synchronize the phase with that of the downlink signal 212, Perform the tracking function described. Digital signal processor 258 Slave code seed via slave tracker 260 and carrier tracker 262. Controls cans sulfur. The automatic gain adjustment unit 264 has an RF reception interface. To control the gain of the source 250, an automatic gain adjustment signal is generated. Code generation And despreader 256 are connected to nodes under control of node synchronization logic unit 268. For further synchronization by the synchronization interface 266, 16 Generate 0 kilobits / second I and Q. The node synchronization interface 266 Through the node synchronization logic unit 268, the I and Q channels are received in four different ways. And decide if the I and Q channels should be exchanged.   The Viterbi decoder 270 performs a forward error correction for the I and Q channels. 160 km with error correction after 71 symbol delays Generate a data signal at bits / second. The error corrected signal is sent to the frame aligner. The extractor 272 determines the frame alignment and power control Extract signal 236, code synchronization signal 234 and operation maintenance channel signal 238 You. The frame aligner and extractor 272 also includes a first user 208 and a second user. User channel 226 for transmission of traffic to The second user channel 228 is extracted and the high-level data link controller 27 is extracted. 4 and signal output channel 2 for processing by microcontroller 276 Extract 30. The frame aligner and extractor 272 may also include a frame aligner. Provide an alarm and an error indication based on the detection of the loss of the comment. Non-volatile Random access memory 278 may be used to facilitate ring re-establishment. For insertion of subsequence via arbitrator 280 in case of loss The system parameter information is stored. The arbitrator 280 also has a digital Interface between the signal processor 258 and the microcontroller 276. Give the source.   In the transmission direction, the frame inserter 282 includes the first user 208 and the second Receiving first user traffic and second user traffic from user 210 Receives signal output channel information from high level data link controller 274 And receives information on the operation maintenance channel 238 from the microcontroller 276. . The frame inserter 282 is processed by the spiral encoder 284. For this purpose, a frame information signal 218 for the uplink signal 214 is generated. Swirl Wound encoder 284 provides a forward error correction to provide forward error correction. The data rate of the frame information signal 218 is doubled. Spreader 286 is a spiral The 320 kbit / s signal of the encoder 284 into two 160 kbits And I / Q signals of these signals and the code synchronization signal 234. Generated by the clock generator 290 adjusted according to With the spreading sequence generated by the code generator 288 in response to the The other is ORed. Code generator 288 is a 2.56 MHz chip Pseudorandom sequence having 256 pattern lengths in late and exclusive OR Generate one of the 16 Rademasher Walsh functions taken. The pseudo-random sequence should match that of the central terminal 10, but the other Software to provide reliable rejection of signals from Regulated under control.   Spreader 286 provides I and Q signals to analog transmitter 290. Anna Log transmitter 290 provides pulsed I and And a Q signal. The transmit power is extracted from overhead channel 224 Control voltage from the analog-to-digital converter in response to the power control signal 236 Generated by first establishing. This control voltage is applied to the analog transmitter 290 And a power control input of the RF transmission interface 292. 35 dB Power control of the analog transmitter 290 and the RF transmit interface 292 Obtained in one. RF transmission interface 292 has a range of 30 dB Includes a step attenuator that provides 2 dB attenuation. This attenuator has a high output level. Used to switch between the power level and the low output level. In increasing power, The large attenuation is selected to minimize the transmitter 204 transmit power.   As described above, a wireless communication system provides a wireless communication to a user who is away from a public switched telephone network. Give spoken communication. The radio communication system uses CDMA spread spectrum radio frequency Central terminal communicating with multiple users served by the subscriber terminal through transmission including.   As mentioned above, although a detailed example was described, the present invention is not limited to this. And many modifications and additions thereto are within the spirit and scope of the present invention. You will see what is done.

────────────────────────────────────────────────── ─── Continuation of front page    (31) Priority claim number 9513166.0 (32) Priority date June 28, 1995 (33) Priority claim country United Kingdom (GB) (31) Priority claim number 9513168.6 (32) Priority date June 28, 1995 (33) Priority claim country United Kingdom (GB) (31) Priority claim number 9513170.2 (32) Priority date June 28, 1995 (33) Priority claim country United Kingdom (GB) (31) Priority claim number 95131722.8 (32) Priority date June 28, 1995 (33) Priority claim country United Kingdom (GB) (81) Designated countries EP (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, L U, MC, NL, PT, SE), OA (BF, BJ, CF) , CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG), AP (KE, LS, MW, SD, S Z, UG), UA (AM, AZ, BY, KG, KZ, MD , RU, TJ, TM), AL, AM, AT, AU, AZ , BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, I L, IS, JP, KE, KG, KP, KR, KZ, LK , LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, R U, SD, SE, SG, SI, SK, TJ, TM, TR , TT, UA, UG, US, UZ, VN (72) Inventors Cooper, Ian, Leslie             Basing Stroke Urge, England             -24.8 Weier, Oold Basin             , Hire Mead 20 (72) Inventor Riseiko, Martin             Sari gu, UK 19.5 Avi             ー, Bug Shot, Ceida Crows 61             Turn

Claims (1)

[Claims]   1. Operable to receive user traffic and control information; Operable to generate a first signal representing control information in a traffic mode. Operate in mode to generate a second signal representing control information and user traffic Possible spreaders;   Coupled to a spreader for communicating one of the first signal and the second signal to a central terminal. A converter operable to convert to a transmit signal for   Subscriber terminal located at a fixed distance from the central terminal consisting of   2. The spreader generates a first signal at a first speed and more than a first speed. 2. The subscriber terminal according to claim 1, wherein the second terminal generates the second signal at a large second rate.   3. An amplifier coupled to the converter and operable to amplify a transmitted signal Vessels,   An antenna coupled to the amplifier and operable to amplify the transmitted signal;   The subscriber terminal according to claim 1, further comprising:   4. Coupled to the converter and having a first power and a first power Operable to amplify transmitted signal while selected of small second power 2. The subscriber terminal according to claim 1, further comprising an amplifier.   5. Coupled to the converter and having a first power and a first power Operable to amplify transmitted signal while selected of small second power Further comprising an amplifier, wherein the first power is the acquisition mode of the subscriber terminal. The subscriber terminal according to claim 1, which corresponds to a password.   6. Coupled to the converter and having a first power and a first power Operable to amplify the transmitted signal at least one of the small second powers And the second power is in standby mode of the subscriber terminal. A corresponding subscriber terminal according to claim 1.   7. Claims further comprising a telephone operable to generate user traffic Item 2. The subscriber terminal according to item 1.   8. Send control information at the first speed,   Detect requests for user traffic,   A second speed greater than the first speed in response to a request for user traffic Sending control information and user traffic at a time,   Wireless telephone communication between fixed locations.   9. Before transmitting the control information,   Receiving control information at a first rate, and establishing a receiving communication path;   The method of claim 8, further comprising:   10. Before transmitting the control information,   Receiving control information at a first speed and a first power,   Establish a receiving communication path, and   Receives control information at first speed and second power when receiving communication path is established And wherein the second power is less than the first power,   The method of claim 8, further comprising:   11. Transmitting the control information,   Transmit control information at first speed and first power to establish transmission communication path And   Transmission of control information at first speed and second power when transmission communication path is established And the second power is less than the first power;   The method of claim 8, comprising:   12. Transmitting the control information comprises combining the control information with a code sequence. 9. The method of claim 8, comprising combining.   13. Transmitting the control information comprises combining the control information with a code sequence. And the code sequence comprises a pseudo-random noise code. 9. The method of claim 8, comprising a combination of a code and an orthogonal code.   14． Detecting the request indicates a request for user traffic. The method of claim 8, comprising receiving a message from a remote device. .   15. The step of transmitting the control information and the user traffic comprises: And combining user traffic with a code sequence. 9. The method according to 8.   16. The step of transmitting the control information and the user traffic comprises: And combining user traffic with code sequences, and Thus, the code sequence is a combination of a pseudo random noise code and an orthogonal code. 9. The method of claim 8, wherein the method comprises:   17． After transmitting the control information and user traffic,   Receiving a call termination instruction, and   Transmitting control information at the first rate in response to the call termination instruction,   The method of claim 8, further comprising:   18. After transmitting the control information and user traffic,   Send a call termination instruction, and   Transmitting control information at the first speed,   The method of claim 8, further comprising:   19. Multiple modem cards, each modem card is a fixed distance from the central terminal User traffic associated with at least one of a plurality of subscriber terminals located in And the modem card is operable to receive control information. Each modem card is operable to generate a first signal representing control information, Emits a second signal representing control information and user traffic in traffic mode Operable to produce   An analog card coupled to the modem card, wherein the analog card is An addition representing one of the first signal and the second signal generated by each of the dem card Operable to generate a signal;   Central terminal consisting of:   20. A slave unit coupled to the modem card; Communicates user traffic between the modem card and the public switched telephone network 20. The central terminal of claim 19 operable to:   21. Each modem card sends a first signal at a first speed and a second signal at the first speed. 20. The central terminal of claim 19, wherein the central terminal generates the second signal at a second rate greater than the second signal.   22. Operative to amplify the sum signal coupled to the analog card Possible amplifiers,   An amplifier coupled to the amplifier and operable to transmit a sum signal to the subscriber terminal. Tena,   20. The central terminal of claim 19, further comprising:   23. The analog card may generate the first power and power before generating the sum signal. Generated by each of the modem cards while the selected one of the second power 20. The apparatus of claim 19, wherein the apparatus is operable to amplify one of the first signal and the second signal. Central terminal.   24. The analog card has a first power and less than the first power Generated by each of the modem cards while selected of the second power Operable to amplify one of the first signal and the second signal; and 20. The central terminal according to claim 19, wherein the power of the central terminal corresponds to the acquisition mode of the subscriber terminal.   25. The analog card has a first power and less than the first power Generated by each of the modem cards while selected of the second power Operable to amplify one of the first signal and the second signal; and 20. The center of claim 19, wherein the second power corresponds to a standby mode of the subscriber terminal. Terminal.   26. A central terminal and a plurality of subscriber terminals located at a fixed distance from the central terminal; The wireless telephone communication method between   Steps performed at the central terminal,   Receiving a plurality of signals associated with the subscriber terminal;   Spreading each signal to generate a plurality of spreading signals;   Combining the spread signal into a combined signal;   Transmitting the combination signal to a subscriber terminal;   A wireless telephone communication method comprising:   27. 27. The system of claim 26, wherein each signal comprises user traffic and control information. the method of.   28. Receiving the plurality of signals reduces the number of signals from the public switched telephone network. 27. The method of claim 26, further comprising receiving a portion.   29. Spreading each signal,   If this signal represents control information, spread each signal at a first rate, and   If this signal represents control information and user traffic, it is the first rate. Spread each signal at a second rate   27. The method of claim 26, comprising:   30. The first speed corresponds to the acquisition mode, and the second speed corresponds to the traffic mode. 30. The method according to claim 29, which corresponds to a code.   31. One of a first power and a second power smaller than the first power 30. The method of claim 29, further comprising amplifying the spread signal.   32. One of a first power and a second power smaller than the first power Further comprising amplifying the spread signal, and wherein the first power is in an acquisition mode. 30. The method according to claim 29, wherein the second power corresponds to a standby mode and the second power corresponds to a standby mode. .   33. Spreading each signal comprises combining the signal with a code sequence 30. The method of claim 29, comprising:   34. Spreading each signal comprises combining the signal with a code sequence And the code sequence is directly equivalent to the pseudo-random noise code. 30. The method of claim 29, comprising a combination of alternation codes.   35. Downlink signal from a remote device located at a certain distance from the wireless receiver An antenna operable to receive the signal;   Coupled to the antenna and for converting a downlink signal to digital form An operable converter, and   A downlink signal coupled to the converter and in an acquisition mode and at a first rate; Operable to despread control information within the Control information and user traffic in the downlink signal at the second rate. A despreader operable to despread the   Wireless receiver consisting of.   36. Whether the downlink signal received by the despreader is in-phase component and quadrature component 36. The wireless receiver according to claim 35, further comprising:   37. The control information comprises a code synchronization signal and a power control signal. Item 36. The wireless receiver according to Item 35.   38. Whether the downlink signal received by the despreader is in-phase component and quadrature component And further comprising a convolutional decoder coupled to the despreader, The convolutional decoder converts the in-phase and quadrature components of the downlink signal into a single bit stream. The wireless receiver of claim 35 operable to decode into a stream.   39. A frame extractor coupled to the convolutional decoder; A power control signal and a code synchronization signal from the single bit stream. 39. The wireless receiver of claim 38, operable to extract a signal.   40. A frame extractor coupled to the convolutional decoder; The system extractor extracts a first user channel and a second user channel from a single bit stream. 39. The wireless receiver of claim 38, operable to extract the channel.   41. System parameters coupled to the despreader and for link re-establishment A digital signal processor operable to generate meter information;   Coupled to the digital signal processor and storing system parameter information Memory operable to   The wireless receiver according to claim 35, further comprising:   42. Radio between the central terminal and the subscriber terminal located at a certain distance from the central terminal In the communication method,   Receive downlink signal with antenna,   Converting the downlink signal to digital form,   In the acquisition mode and at the first speed, the downlink signal is used to recover the control information. Despread the issue,   Control information and user traffic in traffic mode and at a second rate Despread the downlink signal to recover   Wireless communication method comprising:   43. 43. The downlink signal according to claim 42, wherein the downlink signal comprises an in-phase component and a quadrature component. the method of.   44. The control information comprises a code synchronization signal and a power control signal. Item 43. The method according to Item 42.   45. The downlink signal comprises in-phase and quadrature components; and In-phase and quadrature components of the downlink signal to generate a single bit stream 43. The method of claim 42, further comprising the step of decoding.   46. In addition, power control signals and code synchronization from the single bit stream 46. The method of claim 45, further comprising extracting a normalized signal.   47. Further, the first user channel and the 47. The method of claim 45, comprising extracting two user channels.   48. Furthermore, the power control signal and the Extract the code synchronization signal, and   From the user traffic in the downlink signal to the first user channel and Extracting a second user channel and   43. The method of claim 42, comprising:   49. In addition, generating system parameter information for link re-establishment 43. The method of claim 42, comprising:   50. A subscriber terminal for communicating with a central terminal located at a certain distance from the subscriber terminal At the end,   A spreader operable to receive the information signal, the spreader comprising: Combine code sequence signal and information signal to generate scattered signal Operable,   Operable to receive a code synchronization signal from a central terminal using a wireless link Equipped with a receiver, and   A code generator coupled to the spreader, the code generator including a code synchronization Operable to generate a code sequence signal in response to the digitized signal, and The code synchronization signal defines a phase adjustment to the code sequence signal,   Subscriber terminal comprising:   51. The receiver,   Operable to receive downlink signals from the central terminal, so ,   A code synchronization signal coupled to the despreader and extracted from the downlink signal. A frame extractor operable to emit   51. The subscriber terminal according to claim 50, comprising:   52. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase adjustment, and   Fine phase adjustment,   51. The subscriber terminal according to claim 50, comprising:   53. There are several possible phase adjustments defined by the code synchronization signal,   Phase advance, and   Phase lag,   51. The subscriber terminal according to claim 50, comprising:   54. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase advance,   Fine phase advance,   Coarse phase lag, and   Fine phase lag,   51. The subscriber terminal according to claim 50, comprising:   55. The phase adjustment is based on a previous phase adjustment stored in the memory of the subscriber terminal. 51. The subscriber terminal according to claim 50, comprising:   56. Radio between the subscriber terminal and the central terminal located at a certain distance from the subscriber terminal In the communication method,   Steps performed at the subscriber terminal,   Receiving an information signal associated with the user channel of the subscriber terminal;   Receiving a code synchronization signal from a central terminal using a wireless link,   Generating a code sequence signal in response to the code synchronization signal; The synchronization signal defines a phase adjustment to the code sequence signal, and   Combining the information signal with the code sequence signal to generate a spread signal,   A wireless communication method comprising each step.   57. Receiving the code synchronization signal from the central terminal comprises:   Receiving a downlink signal from the central terminal,   Despread the downlink signal to generate a despread signal, and hand,   Extract the code synchronization signal from the despread signal,   57. The method of claim 56, comprising:   58. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase adjustment, and   Fine phase adjustment,   57. The method of claim 56, comprising:   59. There are several possible phase adjustments defined by the code synchronization signal,   Phase advance, and   Phase lag,   57. The method of claim 56, comprising:   60. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase advance,   Fine phase advance,   Coarse phase lag,   Fine phase lag,   57. The method of claim 56, comprising:   61. Further, the information stored in the memory of the subscriber terminal is stored in response to the code synchronization signal. 57. The method of claim 56, comprising reading a previous phase adjustment.   62. A subscriber terminal for communicating with a central terminal located at a certain distance from the subscriber terminal At the end,   Operable to receive an information signal and further generate a spread signal. A spray operable to combine the information signal with the code sequence signal for And   Operable to receive power control signals from a central terminal using a wireless link. Receiver   Operatively coupled to the spreader and receiving the spread signal; And operable to amplify the spread signal in response to the power control signal. A transmitter whose control signal regulates the power adjustment to the spread signal;   Subscriber terminal consisting of:   63. The receiver receives a code synchronization signal from a central terminal using a wireless link. Code generation operable to communicate and further coupled to the spreader A code sequence signal generator responsive to a code synchronization signal. Operable to generate a code sequence signal. 63. The subscriber terminal of claim 62, wherein the subscriber terminal defines a phase adjustment to the signal.   64. The receiver,   A despreader operable to receive a downlink signal from a central terminal;   Extract power control signal from downlink signal coupled to despreader A frame extractor operable to   63. The subscriber terminal according to claim 62, comprising:   65. There are several possible power adjustments defined by the power control signal,   Coarse power adjustment, and   Fine power adjustment,   63. The subscriber terminal according to claim 62, comprising:   66. There are several possible power adjustments defined by the power control signal,   Power increment, and   Power decrement   63. The subscriber terminal according to claim 62, comprising:   67. There are several possible power adjustments defined by the power control signal,   Coarse power increment,   Fine power increment,   Coarse power decrement, and   Fine power decrement   63. The subscriber terminal according to claim 62, comprising:   68. 63. The method of claim 62, wherein the power adjustment comprises resetting to a minimum power output. Subscriber terminal as described.   69. 63. The method of claim 62, wherein the power adjustment comprises setting to a nominal power mode. Subscriber terminal listed.   70. Between the subscriber terminal and a central terminal located at a certain distance from the subscriber terminal In the wireless communication method,   Receiving an information signal associated with the user channel of the subscriber terminal;   Combining the information signal with the code sequence signal to generate a spread signal,   Receiving a power control signal from a central terminal using a wireless link, and   Amplifying the spread signal in response to the power control signal, wherein the power control signal is Stipulate power adjustment to the   Wireless communication method comprising:   71. In addition, receive a code synchronization signal from a central terminal using a wireless link Step, wherein the code synchronization signal performs phase adjustment to a code sequence signal. 71. The method of claim 70, as defined.   72. Receiving a downlink signal from the central terminal,   Despread the downlink signal to generate a despread signal, and hand,   Extracting the power control signal from the despread signal,   71. The method of claim 70, further comprising:   73. There are several possible power adjustments defined by the power control signal,   Coarse power adjustment, and   Fine power adjustment,   71. The method of claim 70, comprising:   74. There are several possible power adjustments defined by the power control signal,   Power increment, and   Power decrement,   71. The method of claim 70, comprising:   75. There are several possible power adjustments defined by the power control signal,   Coarse power increment,   Fine power increment,   Coarse power decrement, and   Fine power decrement,   71. The method of claim 70, comprising:   76. Operable to receive a downlink signal from the central terminal, De-spread control information in downlink signals at speed and at first rate Operating in traffic mode and at a second speed, Acts to despread control information and user traffic in the uplink signal Possible despreader and   Code coupled to the despreader and from the spread signal A frame extractor operable to extract a reset signal;   The code sequence signal is generated in response to the phase adjustment specified in the code synchronization signal. A code generator operable to generate;   Information coupled to the code generator and associated with the user channel of the subscriber terminal Operable to receive a signal and up for transmission to a central terminal. Combine the code sequence signal and the information signal to generate the link signal. Operable spreader,   Subscriber terminal for communicating with a central terminal consisting of:   77. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase adjustment, and   Fine phase adjustment,   77. The subscriber terminal according to claim 76, comprising:   78. There are several possible phase adjustments defined by the code synchronization signal,   Phase advance, and   Phase lag,   77. The subscriber terminal according to claim 76, comprising:   79. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase advance,   Fine phase advance,   Coarse phase lag, and   Fine phase lag,   77. The subscriber terminal according to claim 76, comprising:   80. The phase adjustment comprises a previous phase adjustment stored in a memory. 76. The subscriber terminal according to 76.   81. The downlink signal consists of in-phase and quadrature components, and Single bitstream coupled to the predder and fed to the frame extractor Convolution operable to decode the in-phase and quadrature components of the downlink signal into the system 77. The subscriber terminal according to claim 76, comprising a single decoder.   82. The frame extractor converts a first user channel from the downlink signal. 77. The subscriber terminal according to claim 76, wherein the subscriber terminal extracts a second user channel.   83. System parameters for link re-establishment A digital signal processor operable to generate data information;   Coupled to a digital signal processor and for storing system parameter information Operable memory and   77. The subscriber terminal according to claim 76, further comprising:   84. Between the subscriber terminal and a central terminal located at a certain distance from the subscriber terminal In the communication method,   Each step performed at the subscriber terminal,   Receiving a downlink signal from the central terminal,   In the acquisition mode and at the first speed, the downlink signal representing the control information is Red and   Control information and user traffic in traffic mode and at a second rate Despread the downlink signal representing   Extract the code synchronization signal from the despread downlink signal,   Receiving an information signal from a user channel associated with the subscriber terminal;   The code sequence signal is generated in response to the phase adjustment specified in the code synchronization signal. Occurs, and   An information signal is encoded to generate an uplink signal for transmission to a central terminal. Combined with the sequence signal,   Communication method consisting of each step.   85. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase adjustment, and   Fine phase adjustment,   85. The method of claim 84, comprising:   86. There are several possible phase adjustments defined by the code synchronization signal,   Phase advance, and   Phase lag,   85. The method of claim 84, comprising:   87. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase advance,   Fine phase advance,   Coarse phase lag, and   Fine phase lag,   85. The method of claim 84, comprising:   88. The downlink signal comprises in-phase and quadrature components, and further comprises The in-phase and quadrature components of the downlink signal before the 85. The method of claim 84, comprising the step of decoding into a frame.   89. The first user channel and the second user channel from the despread downlink signal The method of claim 84, further comprising extracting a user channel. .   90. Generating system parameter information for link re-establishment, and   Storing system parameter information in memory;   85. The method of claim 84, further comprising:   91. Receive antenna operable to receive a downlink signal from a central terminal When,   It is coupled to the receiving antenna and converts the downlink signal to digital form. A receiving converter operable to   Downlink coupled to receive converter, in acquisition mode and at first speed Operable to despread control information in the signal, and Control mode and user traffic in the downlink signal in A despreader operable to despread the fick,   Coupled to the despreader to control the power control signal from the despread downlink signal. A frame extractor operable to extract signal and code synchronization signals;   The code sequence signal is generated in response to the phase adjustment specified in the code synchronization signal. A code generator operable to generate;   An information signal coupled to the code generator and associated with the user channel of the subscriber terminal And further operable to generate an uplink signal. Spreader operable to combine code sequence signals and information signals for When,   Coupled to the spreader and operable to receive an uplink signal; And an uplink signal in response to a power adjustment defined in the power control signal. A transmitter operable to amplify the   Transmitting an amplified uplink signal coupled to the transmitter and to a central terminal Operable transmitting antenna;   Subscriber terminal for communicating with a central terminal consisting of:   92. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase adjustment, and   Fine phase adjustment,   92. The subscriber terminal according to claim 91, comprising:   93. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase advance,   Fine phase advance,   Coarse phase lag, and   Fine phase lag,   92. The subscriber terminal according to claim 91, comprising:   94. There are several possible power adjustments defined by the power control signal,   Coarse power adjustment, and   Fine power adjustment,   92. The subscriber terminal according to claim 91, comprising:   95. There are several possible power adjustments defined by the power control signal,   Coarse power increment,   Fine power increment,   Coarse power decrement, and   Fine power decrement,   92. The subscriber terminal according to claim 91, comprising:   96. A number of possible phase adjustments defined by the code synchronization signal Adjustment and fine phase adjustment, and   A number of possible power adjustments defined by the power control signal 92. The subscriber terminal according to claim 91, comprising a fine power adjustment.   97. A number of possible phase adjustments defined by the code synchronization signal The fine phase lag, the coarse phase lag, and the fine phase lag, and   A number of possible power adjustments defined by the power control signal Increment, fine power increment, coarse power decrement, and fine power 92. The subscriber terminal according to claim 91, comprising a decrement.   98. And a step attenuator coupled to the transmitter. Provides low and high transmit power levels for subscriber terminals. 92. The subscriber terminal of claim 91, wherein the subscriber terminal is operable.   99. In a method for communicating between a subscriber terminal and a central terminal,   Each step performed at the subscriber terminal,   Receiving a downlink signal from the central terminal,   Converting the downlink signal to digital form,   Display control information in the downlink signal in acquisition mode and at the first rate. And   In traffic mode and at a second speed, control information and information in the downlink signal And user traffic,   A power control signal and a code synchronization signal from the despread downlink signal; Extract,   Receiving an information signal associated with the user channel of the subscriber terminal;   The code sequence signal is generated in response to the phase adjustment specified in the code synchronization signal. Occurs   Combine information signal with code sequence signal to generate uplink signal ,   Amplify uplink signal in response to power adjustment specified in power control signal And   Transmitting the amplified uplink signal to a central terminal;   Communication method consisting of each step.   100. Providing low and high transmit power levels for subscriber terminals Attenuating the amplified uplink signal to provide 100. The method according to claim 99.   101. Providing low and high transmit power levels for subscriber terminals Attenuating the amplified uplink signal to provide The low transmission power level corresponds to a standby mode, and the high transmission power level 100. The method of claim 99, wherein corresponds to a traffic mode.   102. There are several possible phase adjustments defined by the code synchronization signal,   Coarse phase advance,   Fine phase advance,   Coarse phase lag, and   Fine phase lag,   100. The method of claim 99, comprising:   103. There are several possible power adjustments defined by the power control signal,   Coarse power increment,   Fine power increment,   Coarse power decrement, and   Fine power decrement,   100. The method of claim 99, comprising:   104. Several possible phase adjustments defined by the code synchronization signal Adjustment and fine phase adjustment; and   A number of possible power adjustments defined by the power control signal And fine power adjustment,   A subscriber terminal according to claim 99.   105. Several possible phase adjustments defined by the code synchronization signal Advanced, fine phase advance, coarse phase lag, and fine phase lag, and   Multiple possible power adjustments defined by the power control signal Increment, fine power increment, coarse power decrement, and fine power 100. The subscriber terminal according to claim 99, comprising decrementing.   106. The downlink signal is composed of in-phase and quadrature components, and For decoding the in-phase and quadrature components of the uplink signal into a single bit stream. 100. The method of claim 99, further comprising a loop.   107. The first user channel and the second user channel from the despread downlink signal 100. The method of claim 99, further comprising the step of extracting the user channels. .   108. Generate system parameter information for link re-establishment, and   Storing system parameter information in the memory of the subscriber terminal;   100. The method of claim 99, further comprising: