KR100258550B1 - Wll group terminal - Google Patents

Abstract

PURPOSE: A WLL(Wireless Local Loop)-type collective terminal is provided to offer bidirectional communication to a plurality of generic subscribers by providing a concentrating function to a given WLL radio channel in a suitable method using a collective terminal, located at the middle of a base station and a generic subscriber terminal in a WLL system and configured of multiple WLL baseband signal processing units. CONSTITUTION: A WLL signal processing unit is divided into a timing generation part, a transcoder part(37), a WLL-CDMA modem part(42), an ACU(Analog Common Unit) part(35), and a control part. The timing generation part receives a main clock of 32.768MHz and generates various clocks and timing associated information necessary for CDMA signal processing. The transcoder part(37) converts voice data processed in a voice compression method, such as 32Kbps ADPCM, 16Kbps LD-CELP or 8Kbps CS-ACELP, into 64Kbps PCM data. The WLL-CDMA modem part(42) executes a PN code band spreading/despreading function, a quaternary band spreading function, a channel coding/decoding function, a channel interleaving/deinterleaving function, a data scrambling function, and a power control function. The ACU part(35) digitally combines digital signals outputted from the WLL-CDMA modem part(42) and converts the combined digital signal into an analog signal. The control part, connected with the WLL-CDMA modem part(42), controls the whole of the WLL signal processing unit. The control part executes a function to control a plurality of CDMA modems using a processor.

Description

WLL type collective terminal device

The present invention is a method of configuring a collective type WLL terminal device which performs two-way wireless communication through a multi-line connection with a general subscriber station device such as a telephone, a fax, a modem, a cordless phone, a PC, and the like by interoperating with a wireless subscriber network system. The present invention relates to a telephone communication capable of voice and non-voice communication, data communication using a data terminal apparatus such as a PC, an ISDN service, and the like. In addition, it can be used as a group type communication such as apartments, offices, and large buildings, as well as its own communication network in a small area. It can also be used for remote meter reading, distance learning, video conferencing, unattended security or security.

Existing terminal devices such as telephones, faxes, modems, etc. are interfaced to wireline telephone networks through subscriber network lines to provide services to users, so the service provider pays a lot of construction costs to the telephone company and subscriber's premises. It has provided a service to subscribers by establishing a loop). In addition, since the subscriber terminal device provided in the existing wireless environment is provided with a single line by the subscriber having the terminal device, the wireless network construction cost problem, the individual terminal maintenance / maintenance problem, and the user's electric bill burden in the wireless environment Problems such as antenna installation due to propagation attenuation in the 2.3GHz band and whether or not to provide a level of communication service quality equivalent to that of a wired wire are needed to solve this problem, and it is necessary to solve this problem. It is necessary to transmit the I and Q signals to the RF stage by synthesizing signals between the same signal components of the band I and Q signal components, and a performance analysis device for collecting and analyzing the performance of the CDMA radio link between the base station and the terminal equipment (DM: Diagnostic channel) and various wireless channel or system related parameters provided by CDMA ASIC in WLL signal processing section. It is necessary to connect with a device that collects the data, and it is necessary to increase the radio channel capacity of the base station by preventing waste of the radio channel by an overhead channel such as a PPCS channel. In case of this call state (Busy), it is necessary to provide Reorder Tone to general subscriber terminal device (telephone) to retry call by providing Reorder Tone that call access restriction status is released, and provide WLL service. There is a need for a method of inputting a WLL Access Secret Key (WASK) and a WLL (WLL Subscription Identity) value to the terminal in order to join the terminal.

Accordingly, the present invention utilizes a collective terminal device having multiple WLL baseband signal processing units located in the middle of a base station of a wireless subscriber network (WLL) system and a general subscriber station device to provide a convergence function in a given manner with a given WLL wireless channel. It provides two-way communication to multiple general subscribers. A base station and a WLL group terminal device of a wireless subscriber network (WLL) system provide wireless access using code division multiple access (CDMA), and voice and voice band data provided by a conventional wired subscriber telephone network. It can provide services such as service quality equivalent to that of existing wired subscriber telephone network. In this case, it can be provided to existing general telephones and various terminal devices without adding additional devices or functions, and WLL baseband signal The RF signal processing unit is commonly used by multiple subscribers by configuring multiple processing units (including modems), and one of a plurality of modem ASICs performs a function such as power control in CDMA using a master / slave control method. Modems can be controlled in a way that only the modem can control the RF output. A method of constructing a WLL group terminal device that performs a converging function to provide a circuit port and a plurality of baseband I and Q signal components output from a plurality of CDMA modem ASICs by synthesizing signals between the same signal components I, Q Method to configure the signal to be transmitted to the RF stage, and connected to the performance analysis device (DM; Diagnostic Monitor) for collecting and analyzing the performance of the CDMA radio link between the base station and the terminal equipment provided by the CDMA ASIC in the WLL signal processing unit A method of connecting with a device that collects various radio channels or system related parameters, a method of increasing the radio channel capacity of a base station by preventing waste of radio channels by overhead channels such as a PPCS channel, all available When the wireless channel is busy (Busy), a method to notify the general subscriber that call access restriction has been released. In order to join the end to provide a WASK, configuration method, etc. that can input a value to the terminal WSI.

1 is an overall configuration diagram of a wireless subscriber network system (Wireless local loop) to which the present invention is applied, including a WLL terminal capable of processing a wireless subscriber network (WLL) signal.

2 is a block diagram of a collective terminal device including the contents of the present invention.

FIG. 3 is a detailed block diagram of the WLL signal processing unit in the modem unit among the blocks of FIG.

4 is a detailed block diagram of the connection and configuration of the ACU unit and the modem unit in the WLL signal processor module of FIG.

FIG. 5 is a detailed block diagram of a subscriber interface unit interfaced with a general analog subscriber in the collective terminal apparatus of FIG.

* Explanation of symbols for main parts of the drawings

11: charging center 12: exchanger

13: operation maintenance center 14: base station operation apparatus

15: base station controller 16: IWF (data network interworking device)

17: base station 18: terminal device

19: general analog telephone 20: main control

21: RF unit 22, 34: WLL RF processing unit

23: BWLL RF processing unit 24: Cable RF processing unit

25: modem portion 26: WLL signal processing portion

27: BWLL signal processor 28: cable signal processor

29: mux / demux (MUX / DEMUX)

30, 52: control unit 31: switch unit

32: subscriber interface unit 33: power unit

34: WLL RF processing unit 35: ACU unit (Analog Common Unit)

36: timing generator 37: transcoder

38, 39, 40, 41: CDMA MODEM Chip Set

42: modem unit 43: WLL signal processing unit

44: processor 45: watchdog

46: SIO section 47: MMI section

48: RAM 49: ROM

50: flash memory 51: control unit

52: control unit 53: switch unit

54: subscriber interface unit 55: A / D conversion unit

56: RX buffer 57: D / A converter

58: Digital Combiner

59: modem unit 60: ACU unit

61: PCM codec

62: SLIC (Subscriber Line Interface Circuit) part

63: tone generator 64: ring generator

In order to solve the above problems, the present invention provides an antenna for transmitting and receiving a signal to and from a base station of a wireless subscriber network system operating in the 2.3 GHz band, a transceiver for providing a separate path during transmission and reception between a base station and a WLL group terminal device, and a WLL group. Transmitting the baseband signal from the transmitter and the transceiver for processing and transmitting the signal of the terminal device to the antenna through the transmission and reception splitter, and the signal from the antenna through the transmission and reception splitter Local oscillator to generate frequency for up-conversion and RF signal to baseband signal, and A / D converter and digital synthesizer to convert analog signal to digital signal and output to WLL baseband signal processor. Base station and WLL consist of D / A converter that converts digital output signal into analog signal. RF signal processor for transmitting / receiving actual signals between short-terminal devices, RF signal processor by receiving N I signal components and N Q signal components from N CDMA ASIC chips and combining the same signal components with each other Digital synthesizer that functions to separate N I and Q signal components from RF signal processing section and output them to CDMA modem chip, and generates various timing information necessary for system clock and control to all WLL signal processing section. Timing generator, which supplies 64Kbps PCM data from voice call to 32kbps ADPCM or 16kbps LD-CELP, 8kbps CS-ACELP data, and converts 32kbps ADPCM or 16kbps LD-CELP, 8kbps CS-ACELP data to 64kbps PCM data Transcoder section that performs functions, initial synchronization acquisition of PN codes, modulation and demodulation of bidirectional signals, quadrature spreading / despreading, interleaving / deinterleaving, channel coding And a baseband processor for CDMA digital signal processing such as decoding and power control, a processor 44 in charge of controlling the entire system, a memory for storing system software and various WLL system related parameter data, and an input / output signal from a transcoder unit. The subscriber interface unit converts the digital voice signal into an analog signal and provides a ring signal or a tone signal to the subscriber terminal device, and routes N incoming and outgoing signals to M subscribers through a call. It consists of a switch part.

EXAMPLE

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an entire wireless subscriber network system including a WLL group subscriber terminal device including the contents of the present invention, and includes a base station 17, a base station controller 15, a base station operating device 14, and a data network interworking. The device 16, the exchange 12, the charging center 11, the operation maintenance center 13, the WLL group terminal device is largely divided into six major parts.

The general subscriber station device is wired to the WLL group terminal device, and is wirelessly connected to the base station 17 through the wideband code division multiple access (W-CDMA) in the frequency band of 2.3 GHz. Voice and non-voice communication services are provided through the base station controller 15, the switch 12, and other network elements.

In FIG. 1, the base station 17 has a radio resource management function such as allocation and release of a radio channel, a wired resource management function such as setting and clearing a wired link channel connected to the base station controller 15, and a wireless connection with a terminal device. Function, digital demodulation function, power control function, etc., matched with the base station controller 15, and matched with the WLL group type terminal device in a wireless channel using a wideband code division multiple access (W-CDMA) technique. Performs a function of forming a subscriber data path from the base station controller (15).

In FIG. 1, the base station controller 15 includes an on / off signal processing function, a base station matching and management function, and compression of voice signals (64k A-law PCM 32k ADPCM, 16k LD-CELP, 8k) performs subscriber traffic processing functions such as function and voice band data processing function, and downloads software and database from base station operating device 14 to download to base station, operation processing function such as test function, data service And a matching function with the data network interworking device 16 and the base station operating device 14, and a matching function with the switch 12.

In FIG. 1, the base station operating device 14 performs a configuration management function and a failure management function of the entire wireless subscriber network system, subscriber management functions such as performance management and security management functions, operator matching function with a system operator, and a base station 17 And the base station controller 15 and the software downloading function to the terminal equipment, and are responsible for the operation and maintenance of the base station 17, the base station controller 15, and the WLL collective terminal equipment. Performs service and subscriber management functions.

In FIG. 1, the switch 12 is a base station controller 15 and a network element that performs all functions necessary for processing wired / wireless start / reception signal processing, subscriber movement processing, network management, operation management, maintenance, and OMC related function processing. The matching function with the charging center 11 and the other network interworking function.

In FIG. 1, an IWF means a subscriber having a PC to search database information stored in a data communication network or to directly connect to a high-speed network or the Internet. Say a device to perform such.

In FIG. 1, the WLL group type terminal device is located in the middle of the base station 17 and the general subscriber terminal device to terminate the wireless connection of the subscriber side, and the bearer channel is changed for transmission of voice band data such as a fax and a modem. It performs Bearer Channel Modification) function and provides subscriber line interface that provides voice and voice band data service by connecting with general subscriber terminal device.

In Figure 1, the operation maintenance center 13 is responsible for the operation and maintenance of the entire access network (Access Network) including the wireless subscriber network.

In FIG. 1, the charging center 11 collects charging related data from the exchange 12 or the data network interworking device 16 to perform a charging processing function. The eight main parts make up the entire wireless subscriber network system.

2 is a block diagram of a collective terminal device 18 including the contents of the present invention. The collective terminal device 18 is a wireless subscriber network signal (WLL) and a broadband wireless subscriber network signal (B-WLL). It is a group type device that can be used regardless of the transmission media such as Local Loop) and cable subscriber network signal. It is a communication terminal device that can be connected to WLL network, BWLL network and cable subscriber network. A communication terminal device capable of providing a communication service by separately receiving each transmission medium such as a WLL, a BWLL, a cable network, and the like, and using a limited radio channel or wired channel resource in a group terminal device 18. These limited wired / wireless channel resources are concentrated at a 1: N ratio to provide a function of accommodating a plurality of general subscriber lines. When one of the three transmission media is to be used to provide a service, the service may be provided by replacing only the corresponding signal processor and the RF signal processor. When providing a service by accessing a 2.3 GHz wireless subscriber network, the service can be replaced by using only the WLL RF processor 22 module and the WLL signal processor 26 module of FIG. 2.

In FIG. 2, the collective terminal device 18 includes the main controller 20, the RF unit 21, the modem unit 25, the mux / demux unit 29, the switch unit 31, and the subscriber interface unit 32. ), The control unit 30, and the power supply unit 33 are largely divided into 10 main parts, and the main control unit 20 manages a database of users connected to the subscriber interface unit 32 in a nonvolatile memory to transmit and receive traffic. It also sets the path and transfers the subscriber database to each card from the memory stored at the time of system shutdown due to abnormal termination such as power off. The RF unit 21 of FIG. 2 is responsible for processing and transmitting and receiving RF signals such as a wireless subscriber network, a broadband wireless subscriber network, a cable subscriber network, and the modem unit 25 includes a WLL signal processor 26 and a BWLL signal. It may be configured as three, such as the processing unit 27, the cable signal processing unit, or may be configured to mount only one signal processing unit suitable for the characteristics of the transmission medium. The mux / demux unit 29 performs a function of receiving a signal of a service user as an input via a switch unit, generating a frame of a suitable size, and rearranging the unit in a time slot unit. The control unit 30 is responsible for the transmission and reception for control of each card and control with the main controller 20 when each module of the collective terminal device 18 is mounted in units of cards. The switch unit 31 provides an aggregation function of N: M for efficient use of wired / wireless resources to connect the signal from the mux / demux unit 29 to the subscriber interface unit, and the signal from the subscriber interface unit to the MUX / Performs the function of properly connecting to the DEMUX (29). The power supply unit 33 provides a function of supplying power to the collective terminal device 18 and also performs an auxiliary power switching function.

In FIG. 2, the WLL RF processor 22 is an antenna for transmitting and receiving a signal to and from a base station 17 of a wireless subscriber network system operating in the 2.3 GHz band, and a separate path for transmitting and receiving a WLL signal between the base station and the collective terminal device 18. A transceiver for processing a WLL signal and transmitting the signal to the antenna via the transceiver and a baseband signal formed by the receiver and the transceiver receiving and processing a signal from the antenna through the transceiver; It consists of a local oscillator that generates a frequency for up-conversion to convert the RF signal, and a down-conversion to convert the RF signal to the baseband signal. In FIG. 2, the WLL RF processing unit 22 is an RF of 2.370 ~ 2.400GHz band from the antenna. Band-noise for receiving only the optimal signal by suppressing the low noise amplifier (LNA) and the out-of-band noise and spurious radiation components. After converting the signal that passed through the filter and the signal generated by the frequency synthesizer in the frequency mixer and performing down-conversion to convert to the intermediate frequency (IF), the intermediate frequency IF signal is extracted from the signal output from the frequency mixer using the SAW filter. do. After receiving and bandpassing the W-CDMA baseband signal generated by the WLL signal processor, the baseband signal is converted into an RF signal of 2.3 GHz by combining with a signal generated by a frequency synthesizer using a frequency mixer. It amplifies the transmission power enough to talk with the base station using the power amplifier and transmits it through the antenna through the duplexer.

2, the WLL signal processing section A / D conversion section 55, CDMA modem section 42, timing generation section, transcoder section 37, ACU section 35, processor 44, memory section (ROM) , RAM, flash memory), which converts the I-channel signal and the Q-channel signal, which are intermediate frequency IF analog signals generated by the WLL RF processor 22, into digital signals by the A / D converter 55. And Q-channel signals are generated and input to a plurality of CDMA modem units which process WLL baseband CDMA signals, and are separated into respective corresponding channels through correlation with signals received from each modem ASIC. In the case of the reception path, the demodulation unit of each CDMA modem 38 uses an I and Q channel PN sequence generated by a PN 32 generator block of a finger to spread a signal spread by a 32-bit PN sequence. PN despreading is performed by performing correlation with and adding the energy, and separate channels by using different PN codes for quaternary spreading for distinguishing I and Q channels on the forward channel. Each code channel on the forward channel (Pilot channel, Sync channel, Paging channel, traffic channel, PCS (Power Control & Signaling) channel to distinguish the (Wash (Hadamard)) code Walsh Demodulation is used to separate I and Q channels, separate code channels such as traffic channels, deinterleaving for each channel, and Viterbi decoding. ) The demodulation of the signal is ended. Here, the voice data transmitted by various voice compression methods such as 32 kbps ADPCM or 16 kbps LD-CELP is outputted from the transcoder section 37 back to the 64 kbps PCM signal during demodulation in the Viterbi decoder block. It performs the function. In addition, the radio resource control function required for setting and allocating a radio channel necessary for providing a service to a general subscriber terminal device (telephone, fax, modem, etc.), radio resource management, access control for call connection, and outgoing call processing function And so on.

The BWLL RF processor 23 of FIG. 2 converts a 26 GHz RF signal received from an antenna into a baseband IF signal and outputs the BWLL signal processor, which is a baseband signal processor, to output a baseband signal generated by the baseband BWLL signal processor. It converts the RF signal into 26GHz band using the mixer and outputs it to the antenna.

The BWLL signal processor of FIG. 2 performs essential functions of the BWLL system, such as radio signal modulation and demodulation necessary for wireless connection with the base station 17, MAC protocol control for managing and allocating radio resources, and origination and call processing.

The cable RF processor 24 of FIG. 2 is a block for processing RF signals of uplink and downlink channels of a terminal device of a cable subscriber network system using a CATV network.

The cable signal processor 28 of FIG. 2 is connected to a head-end of a cable subscriber network system to control and demodulate cable signals, to manage and allocate channel resources, to control MAC protocols for channel release, and to make and receive calls. Perform processing functions.

The control unit 30 of FIG. 2 maintains the data of the general subscriber in the control unit and performs a control processing function of connecting the CDMA modem and the subscriber interface unit 1: 1 in the case of an incoming call, and performs RF processing unit, WLL signal processing unit, and switching unit of the terminal device. It controls the back.

The switch unit of FIG. 2 provides a switching function for establishing a communication path with the N terminating subscriber stations connected to the subscriber interface unit for data generated by the WLL signal processor. In the case of a general subscriber originating call, a call path for selecting one of the N CDMA modems of the WLL signal processor 26 is set.

The power supply unit 33 of FIG. 2 functions to supply power to each of the WLL signal processing unit 26 and the WLL RF signal processing unit, and has an auxiliary power source provided therein to provide continuous communication service in case of a commercial power failure. Perform a power transfer function.

3 is a detailed block diagram of the WLL signal processing unit 26 and other blocks of the collective terminal device 18 connected to the WLL signal processing unit 26 in the configuration diagram of the collective terminal device 18 of FIG. 2. To send.

In FIG. 3, the WLL signal processor 26 is largely divided into five main parts: a timing generator, a transcoder 37, a WLL-CDMA modem 42, an ACU 35, and a controller.

The timing generator of FIG. 3 has a CDMA chip rate of 8.19Mps when one RF channel operates in a 10MHz bandwidth, so sampling this signal 4 times and receiving 32.768MHz main clock to process the CDMA signal. It generates various types of clock and timing related information required for the operation, and generates and provides clock and timing information of the entire WLL signal processor 26.

The transcoder unit 37 of FIG. 3 can implement a voice encoder in various forms of voice compression such as 32 kbps ADPCM, 16 kbps LD-CELP, 8 kbps CS-ACELP, 8 kbps EVRC, and can accommodate such various functions without changing hardware. The function of the transcoder unit 37 is implemented by DSP (Digital Signal Processing) technology, so as to accommodate all the functions if only the program is changed as necessary. The function of the transcoder section 37 converts the voice data processed by the voice compression method such as 32 kbps ADPCM, 16 kbps LD-CELP, or 8 kbps CS-ACELP transmitted through the wireless channel into 64 kbps PCM data, and converts the general analog subscriber. To 64kbps PCM data passing through the PCM codec 61 to a voice compression method such as 32kbps ADPCM, 16kbps LD-CELP or 8kbps CS-ACELP.

The function of the analog common unit of FIG. 3 converts the analog signal from the RF processing unit into a digital signal and operates in the multi-subscriber signal mode, thereby digitally outputting the digital signals output from the N CDMA modem units 42. It combines the combined digital signal into an analog signal. The detailed operation principle of this ACU unit 35 is as follows.

In the case of a receiver (digital synthesizer link), the I (In-phase) signal and the Q (in-phase) signal, which is an analog baseband signal generated by mixing the intermediate frequency (IF) and the baseband I and Q signals set in the system design by the RF processor of FIG. The A / D converter 55 converts quadratue phase signals into 4 bits of digital signals at a sampling rate of 32.768 MHz, which is four times the chip rate, and distributes the digital signals to each CDMA modem. .

In the case of the sender (forward link), digital synthesis synthesized here is performed by synthesizing signals using the digital synthesizer 58 of FIG. 4, in which N I channel information and Q channel information generated in each CDMA modem chip are the same. A signal is converted into an analog output signal using the D / A converter 57 of FIG.

The CDMA modem unit 42 of FIG. 3 has a searcher function in the modem ASIC, so that accurate synchronization is very important in the process of finding the original data signal from the spread signal. The receiving section of the terminal apparatus generates the same code as the spreading code PN sequence used for spreading by the transmitting section of the base station 17. Synchronization is to match the timing of the locally generated spreading of the terminal equipment and the code in the received signal, and the synchronization of the received signal and the locally generated spreading code within a difference of less than 1/2 chip is the acquisition of the synchronization, In order to reduce the timing difference, tracking is performed. The modem unit performs the PN code initial synchronization acquisition and tracking functions, and the quadrature spreading function for distinguishing I and Q channels on the forward CDMA channel, and the same forward direction. Walsh demodulation is performed by using Wash (Hadamard) code to distinguish pilot channel, sync channel, paging channel, traffic channel and PCS (Power Control & Signaling) channel. Separate I and Q channels, separate each code channel such as traffic channel, deinterleaving for each channel, and Performing a non-decoding the demodulation of the signal is ended. As such, the modem unit performs PN code spreading and despreading, quaternary spreading, channel encoding and decoding, channel interleaving and deinterleaving, data mixing, and power control, which are CDMA core signal processing functions. Interface to perform CDMA-related signal processing functions under processor control.

The control unit of the WLL signal processing unit 26 of FIG. 3 is connected to the control unit of the CDMA modem unit 42 and the collective terminal apparatus 18 of FIG. 2 to control the entire WLL signal processing unit 26. The processor performs a function of controlling a plurality of CDMA modems, and is composed of a processor, a watchdog 45, an SIO, a RAM, a ROM, a flash memory, and the like. The processor (CPU) controls the entire WLL signal processing section 26 and the RF signal processing section, using a single CPU to control the N modems to simplify the signal processing procedure, minimize the cost of the device in the implementation, SRAM is the system operation ROM stores the basic functions of the system and the booting program, and application programs to support program downloading use flash memory, and the SIO (Serial Input / Output) port is the WLL signal processor 26. It is connected to bus of and is used for asynchronous serial communication with outside of device by using RS-232C method. In the present invention, the WLL signal processor 26 is configured with an SIO unit 46 and connected to a performance analyzer (DM: Diagnostic Monitor) for collecting and analyzing the performance of the CDMA radio link between the base station and the terminal equipment. It is used to collect various radio channel or system related parameters provided by CDMA ASIC in 26). The connection standard between DM and terminal is defined as follows. Physical connection uses RS-232C standard, connector meets 9-pin D-Sub, signal standard meets EIA RS-232C standard, signal level is DC 12V, protocol is asynchronous HDLC (Modified HDLC) data format. Use The function of the watchdog 45 of FIG. 3 performs a function of generating a reset signal.

In FIG. 3, the method of configuring the WLL signal processors 43 and 26 configures up to N CDMA modems on one board so that the number of simultaneously allocated radio channels can be up to N when the number of modems is N. However, the number of simultaneous call channels can be as many as the number of modems used. As shown in FIG. 3, each modem and the transcoder unit 37 may be configured to correspond to one-to-one (1: 1) or may be connected to a plurality of modems using one transcoder unit 37. In addition, although the conventional terminal device has a one-to-one configuration between the modem and the RF processing unit, in the present invention, the NLL modem unit which processes the N baseband signals in one RF processing unit is commonly used. This method uses the WLL signal processing unit 26. The baseband I-channel signal component and the Q-channel signal component are digitally synthesized by the digital synthesizer 58 and the respective I and Q channel signals outputted from the N modem units are converted into analog signals by converting the digital signals into analog signals. It is possible by providing to a processing part.

In addition, the method of controlling the RF processor is an AGC (auto gain) for controlling the RF processor in the CDMA modem chip when the N CDMA modem chip 38 is implemented in a board unit or a device unit to simultaneously provide N CDMA wireless channels. Control) function, power control function, etc., set one of the N CDMA modem chips mounted as a master and the other act as a slave so that only one CDMA modem designated as the master controls the RF unit to It performs automatic gain control and power control functions.

In addition, in the present invention, one WLL signal processing device composed of the ACU unit 35, the timing generating unit 36, the transcoder unit 37, the modem unit 42, the control unit 43, and the like is one of the group terminals. The RF processor 34 is configured to adopt a method in which several users commonly use one RF processor.

In FIG. 3, the configuration of the uplink and forward channels for the WLL signal processing units 43 and 26 to communicate with the base station includes an access channel and a reverse traffic channel in the type of the reverse link channel set in the direction of the base station from the terminal equipment. The base station is composed of a reverse pilot channel for obtaining the code synchronization and carrier phase information of the access channel and an access information channel for transmitting information of the access channel to the base station. The reverse traffic channel includes a reverse PPCS channel and a reverse traffic information channel. The reverse PPCS channel is divided into a reverse pilot subchannel, a reverse power control subchannel, a reverse signal subchannel, and a reverse reserved information channel to transmit signal information, power control information, and pilot information on the reverse link. The reverse traffic information channel is wireless After the set is a channel for transmitting the actual available traffic data. The type of the forward link channel transmitted from the base station 17 to the terminal device is largely composed of five channels such as a pilot channel, a sync channel, a paging channel, a traffic channel, and a PCS channel, and the PCS channel transmits signal information again. A forward signal subchannel, a forward power control information, and a forward power control < RTI ID = 0.0 > (PR < / RTI > reserved information) channel for transmitting DTX (Discontinuous Transmission) indication information to the terminal.

In FIG. 3, the processor of the controller in the terminal device has control functions such as management, allocation, and setting of radio channels such as a PPCS channel and a traffic channel for N modems. The reverse channel is classified into a single signal mode and a multiple signal mode according to a method of allocating a traffic channel and a PPCS channel to a terminal device. In the single signal mode, one terminal receives one PPCS channel and one traffic channel. In other words, a PPCS channel and a traffic channel are allocated one-to-one to communicate with the base station 17 by using these two channels, and multiple users are connected to one terminal device, and one reverse PPCS channel is allocated and shared by N users. In other words, the PPCS channel is assigned by using 1: N, and the reverse traffic information channel is assigned by each user and used one by one. In the present invention, when the WLL signal processing unit 26 of FIG. The N modems 38 have a convergence function that can be connected to M general telephone subscribers at an appropriate ratio. In the case of providing communication service to M general users, the maximum number of simultaneous call channels is composed of N channels, the number of modems, and whether N modems occupy the wireless channel and are busy. Otherwise, the processor of the WLL signal processing unit 26 detects whether the call is in an idle state and is always in a waiting state while the general terminal subscriber hooks off and the processor operates in a multiple signal mode. N modems are controlled to access N users, and each modem receives only one PPCS channel and uses a shared signaling channel. The traffic channel is assigned to N users. Adopt.

Another method is to implement the WLL signal processing unit 26 as one device or board in FIG. 3, in the case where the number of modems in the device is two or less, assign each user one PPCS channel and one traffic channel. It is also possible to do this.

In FIG. 3, the call control procedure between the base station 17 and the WLL signal processor 26 proceeds as follows.

In the case of an outgoing signal, first, when power is supplied to a collective terminal device having a built-in WLL signal processing device, the modem of the WLL signal processing unit 26 and the spreading code PN sequence used for spreading the spectrum transmitted to the pilot channel of the base station 17 are used. Generate the same code to match the timing between the locally generated PN spreading code of the terminal equipment and the code in the signal received from the terminal equipment to obtain initial synchronization with the base station 17 to obtain the received signal and the locally generated spreading code 1/2. Approaching the difference within the chip to keep the synchronization with the base station 17, and the system identification and time to the WLL signal processing unit 26 from the base station 17 to the synchronization channel (Sync channel) transmitted from the second base station 17 In order to provide the information, the base station seed, protocol version, and timing boundary parameters are received. With the information from the base station seed value, protocol version received from the modem to access the base station 17 can employ a method using the stored in the memory before then to reduce the load on the terminal device processor. In this way, initial synchronization and system identification information are obtained from the base station 17.

Third, information necessary for the terminal device to access the base station 17 through the paging channel, location area identification number of the base station 17, list of neighboring base stations, paging channel information, call type requested by the subscriber The system information of the base station 17, such as radio resource information such as data rate, voice coding method, and the like, is provided.

Fourth, when the subscriber of the general telephone of FIG. 3 hooks off, the processor detects the hookoff state and transmits a channel request message from the base station through the access channel to respond to whether the channel is allocated through the paging channel of the base station. When the fifth base station issues a channel allocation command, it receives the traffic channel. Sixth, after setting the wireless channel in this way, if the terminal device transmits a connect request message for call setup to the base station, after establishing a wired link between the base station, the base station controller 15 and the switch 12, Sends a message (Connect response) that the link is established to the terminal. Seventh, in this way, after the communication channel is established between the terminal apparatus and the switch 12, the network provides a dial tone and the subscriber presses a digit to start a call after listening to the dial tone.

In the present invention, when there is no radio channel to be used between the base station and the terminal device (the wireless channel is busy) by using the tone signal generation unit of FIG. 5 or because the collective type terminal device is provided with the aggregation function, due to the limitation of the number of modems, If there is no subscriber line between the mobile terminal device and the multiple subscriber station devices, i.e., when all the wireless channels that can be provided by the WLL signal processing device in the collective terminal device are busy, the general subscriber hooks off and makes a call. Even if it attempts, the subscriber can't establish the call channel. In this case, priority is set in the order of subscribers who have attempted the call, and if the call access restriction situation described above is released and an idle channel occurs, the reordering service is applied to the general subscriber terminal device as an indication to retry the call by priority. To the phone so that you can try again.

4 is a detailed block diagram of the portion including the ACU unit 35 of FIG. 3, and the ACU unit 60 and 35 are the A / D conversion unit 55, the RX buffer, the digital synthesizer 58, and the D / A conversion unit. Digital outputs from the N CDMA modems 38 because they are connected to the modem section, which is a baseband CDMA signal processing section, convert analog signals from the RF processing section into digital signals, and operate in a multi-subscriber signal mode. Digitally synthesizes a signal to convert a combined digital signal into an analog signal.

In the present invention, when the A / D converter 55, the D / A converter 57, and the digital synthesizer 58 are configured in one device (board) in the WLL signal processing apparatus, In the RF signal processor of FIG. 3, the I (In-phase) and Q (Quadratue phase) signals, which are analog baseband signals generated by mixing the intermediate frequency (IF) and the baseband I and Q signals set during system design, are A / The D conversion section 55 converts the analog baseband signals I and Q into four bits of digital signals at a sampling rate of 32.768 MHz, which is four times the chip rate, and stores the digital signals in the RX buffer of FIG. Distributes to the CDMA modem.

In the case of the sender (forward link), digital synthesis synthesized here is performed by synthesizing a signal using the digital synthesizer 58 of FIG. 4, in which the same I / O information and Q channel information generated in each CDMA modem chip are performed. A signal is converted into an analog output signal using the D / A converter 57 of FIG.

FIG. 5 is a detailed block diagram of the subscriber interface unit of the collective terminal device, and includes four blocks: a PCM codec 61, a subscriber line interface circuit (SLIC) 62, a tone generator 63, and a ring generator 64. The PCM codec 61 of FIG. 5 converts 64 kbps PCM digital data output from the transcoder 37 to the WLL signal processing unit 26 of FIG. 3 into an analog audio signal, and converts the analog audio signal output from the SLIC unit. The tone generating unit 63 in the present invention is used to provide the subscriber with a reorder tone for displaying the retry call to notify the subscriber that the outgoing call connection restriction situation has been released to the general subscriber. do.

The ring generator 64 of FIG. 5 generates an AC 40-90 Vrms call voltage and provides an incoming call signal of the subscriber. The interruption cycle of the call signal is composed of 1 second and 2 seconds.

The SLIC 62 of FIG. 5 has a switch hook detection function to interface with a general analog subscriber such as a general telephone 19, a fax machine and a modem to supply a constant talk current to the subscriber line, and at this time, impedance It monitors the state of the phone by monitoring the value, and also detects the off-hook state while the ring is occurring, and the tip or ring is suddenly shorted to ground, in which case the current Limiting circuitry also senses overvoltage protection to reduce current.

In the present invention, in order to receive the WLL service, the WLL service provider must subscribe to a network or a system provided by the WLL service provider. For example, a method of allocating an International WLL Equipment Identity parameter to a group terminal device having the WLL signal processing unit 26 is as follows.

In case that the WLL signal processing unit 26 of the collective terminal device implements 8 modem chips capable of processing CDMA signals satisfying the domestic WLL radio access standard on one board, the unique identification number of the device at this time IWEI allocates one IWEI per board consisting of eight modems. If you implement a WLL-type device that can provide N CDMA wireless channels simultaneously, one IWEI is representative of the WLL-type device. Will be assigned. In the present invention, a method for allocating an International WLL User Identity (IWUI), which is a WLL user identification number, is assigned to an existing wireline telephone to one board or a WLL group terminal device that can accommodate multiple N CDMA wireless channels. General subscriber's telephone number is recognized as IWUI, and IWUI is assigned as many WLL user identification numbers as the number of subscribers connected to subscriber interface of FIG.

In the present invention, a third terminal is a means for inputting a WLL subscription identity (WSI), which is a WLL subscription identification time identifier, and a WLL access secret key (WASK) parameter, which is a WLL access secret key, to a terminal device. 32-bit WASK and 32-bit WSI can be inputted by connecting the SIO port of the figure to an external terminal device (DM, PC, etc.) via RS-232C. Another method is an RJ-11 terminal to the SLIC 62 of FIG. You can enter the WASK and WSI values using the dial digits of a standard telephone.

First, the apparatus of the present invention as described above, wirelessly limited to a place such as an apartment, a group residential area or an office by wirelessly connecting a base station using a radio wave of several tens of GHz to a broadband code division method (W-CDMA) By configuring the resources in multiple channels, a number of general subscriber terminal devices are connected to the wireless communication terminal device using a wired interface method to perform two-way telephone or non-voice communication without adding additional devices or functions to the existing general phone or various terminal devices. By using a wireless network instead of a wired network, voice and voice band data services provided by a conventional wired subscriber telephone network can be implemented to provide a level of service quality equivalent to that of a wired subscriber telephone network. Secondly, WLL service can be provided to a large number of subscribers by using a group terminal device by providing a converging function of 2: 1 or more by configuring a WLL wireless channel in multiple lines, thereby improving frequency usage efficiency. Third, in terms of network construction, there is no need to configure one WLL terminal device per household in the house, and thus, wireless network construction costs are reduced. Fourth, there is no burden of electric bills because subscribers do not need to have a terminal device.

Fifth, since several users share one RF processor in common, the device RF processor can be implemented at low cost.

Sixth, by using a digital synthesizer 58 that can combine a plurality of baseband I, Q signal components output from a plurality of CDMA modem ASICs with the same signal components to synthesize a signal, effectively synthesizes I, Q signals and RF stages. It can be implemented to be transmitted.

Seventh, the SLL unit 46 is configured in the WLL signal processing unit 26 to asynchronously use a performance monitor (DM) and RS-232C to collect and analyze the performance of the CDMA radio link between the base station and the terminal device. It can be used to collect or analyze the quality of a radio link by using a serial communication method and collecting the radio link or system related parameters provided by the CDMA ASIC in the WLL signal processor 26.

Eighth, multiple users are connected to one terminal device, and one reverse PPCS channel is allocated and shared by N users, and the reverse traffic information channel is allocated to each user one by one, so as not to use the PPCS channel. It has the effect of reducing the interference on the radio signal of the radio signal, and because it prevents the waste of the radio channel by the overhead (overhead) channel, such as the PPCS channel, has the effect of increasing the available radio channel capacity of the base station. Ninth, the implementation cost of the device can be minimized by one processor controlling one modem chip in one WLL signal processor 26.

Tenth, when there is no radio channel to be used between the base station and the terminal equipment by using the tone signal generator (the radio channel is busy) or the collective terminal equipment has the aggregation function, the collective terminal equipment due to the limitation of the number of modem If there is no subscriber line between the multiple subscriber stations and the general subscriber station devices, i.e., all the wireless channels that can be provided by the WLL signal processing device in the collective terminal device are busy, the general subscriber hooks off and attempts the call. In addition, a call access restriction situation occurs in which a subscriber cannot establish a communication channel. In this case, prioritize the call in order of subscribers first, and if the call access restriction situation described above is released and an idle channel occurs, Reorder Tone is a general subscriber terminal device. It can be used to provide a function to allow (call) to retry a call. In addition, in order to provide the WLL service with an asynchronous serial communication port in the SIO unit 46 and an RJ-11 connection port in the SLIC 62, the terminal device must undergo a procedure called subscription. WASK value and WSI value should be input. In the present invention, it is possible to use the WLL service such as voice and voice band data service by providing access port for inputting these two parameter values. have.

Claims (17)

WLL RF processor for converting WLL RF signal of 2.3GHz into baseband signal and converting baseband signal output from WLL signal processor into RF signal, and timing generator for providing various clock and timing information for WLL signal processing And an ACU unit for synthesizing the digital signal transmitted by analog-to-digital conversion of the received signal and digital-analog conversion, and converting 64kbps PCM data into 32kbps ADPCM, 16kbps LD-CELP, 8kbps CS-ACELP, etc., and 32kbps ADPCM, 16kbps. A transcoder unit converts voice compressed data such as LD-CELP, 8kbps CS-ACELP into 64kbps PCM data, and performs many functions of the physical layer of the WLL wireless access standard of W-CDMA. A WLL signal processing section comprising a modem section consisting of a CDMA modem chipset, a control section comprised of a processor, a memory, a watchdog, and controlling the WLL signal processing section; Provides a control unit of the collective terminal device that establishes the connection of the data input and output from the LAN coder to the switch unit, a mux / demux for muxing / demuxing a signal, and an N: M aggregation function. The switch unit 31 which connects the signal from the mux / demux to the subscriber interface unit, and connects the signal from the subscriber interface unit to the mux / demux, and detects the subscriber's hook on / off and sends it to the subscriber. WLL type terminal device, characterized in that consisting of the subscriber interface unit for supplying the call current. The clock generation unit of claim 1, wherein the timing generator is configured to four times sample a CDMA chip rate signal of 8.192 Mbps when one RF channel operates in a 10 MHz bandwidth, receive a main clock of 32.768 MHz, and various clocks required for CDMA signal processing. WLL type terminal device, characterized in that for generating and providing timing-related information. The method of claim 1, wherein the ACU unit, an analog-to-digital conversion of the received signal A / D conversion unit, an RX buffer for storing the converted signal for transmission to the modem unit, I, output from the modem unit, And a digital synthesizer for synthesizing a Q signal, and a D / A converter for digitally-analog converting the synthesized signal and transmitting the digital signal to an RF processor. 4. The ACU of claim 1 or 3, wherein the ACU converts I and Q signals, which are received analog baseband signals, into 4-bit digital signals, respectively, at a sampling rate of 32.768 Mbps, which is four times the chip rate. WLL type terminal device. The apparatus of claim 1, wherein the modem unit interfaces with a control unit to perform PN code spreading and despreading, quaternary spreading, channel encoding and decoding, channel interleaving and deinterleaving, data mixing, and power control. WLL type terminal device, characterized in that consisting of a plurality of modem chipset. The processor of claim 1, wherein the controller controls the WLL signal processor 26 and the RF signal processor and controls a plurality of modems using a single CPU, a RAM for storing necessary data, basic functions, and a boot program. The ROM is stored, the flash memory for storing application programs to support program downloading, the SIO connected to the bus of the WLL signal processing unit to perform asynchronous serial communication with external devices using the RS-232C method, failure, power supply It consists of an MMI unit that displays the status light by LED, a watchdog that generates various necessary timer signals and reset signals, and is connected to the control unit of the modem unit and the collective terminal device to perform call processing, control, and management of the WLL signal. WLL type terminal device characterized in that for controlling the entire WLL signal processing unit. The WLL RF processor of claim 1, wherein the WLL RF processing unit comprises: an antenna for transmitting and receiving a signal to and from a base station of a wireless subscriber network system operating in a 2.3 GHz band; Transmitter for processing discarding and WLL signals and transmitting them to the antenna through the transceiver splitter, a receiver for receiving and processing signals from the antenna through the transceiver and converting the baseband signal from the transceiver to an RF signal It consists of a local oscillator that generates a frequency for downconversion, which converts an RF signal into a baseband signal, and converts an RF signal of 2.3GHz into a baseband signal and converts the baseband signal output from the WLL signal processor into 2.3GHz. The WLL RF processing unit and the ACU unit process the WLL signal multiplely and convert it into multiple RF signals. WLL type terminal device, characterized in that the common use of my WLL RF processing unit. The PCM codec of claim 1, wherein the subscriber interface unit converts the 64 kbps PCM digital data output from the transcoder unit into an analog voice signal and converts the analog voice signal output from the SLIC into a PCM signal; A tone generator that provides the subscriber with a reorder tone for re-call indication, a ring generator that generates an AC 40 ~ 90Vrms call voltage, and provides the call signal of the subscriber, and a general telephone As a part that interfaces with general analog subscribers such as, fax and modem, it has switch hook detection function to supply constant call current to subscriber line, monitor the status of the phone, and protect internal circuits. It is composed of SLIC part which performs overvoltage protection function and so on. WLL-type group-type terminal apparatus, characterized in that. The WLL type terminal device according to claim 6, wherein the external device is a performance analysis device for collecting and analyzing performance data of a link between the base station and the terminal device. 10. The WLL type terminal device according to claim 9, wherein a WLL subscriber identifier or a WLL connection secret key is input to the terminal device through an external device. The WLL type terminal device according to claim 1, wherein a WLL subscriber identifier or a WLL connection secret key is input to a terminal device through a general telephone connected to the subscriber interface via an RJ-11 terminal. The WLL type terminal device according to claim 1, wherein the controller further comprises an MMI unit for indicating a fault, a power supply state, and the like. The WLL type terminal device according to claim 1, wherein the ACU unit, the timing generating unit, the transcdoer unit, the modem unit, and the control unit are configured in one board in hardware to process the WLL signal in multiple lines. 7. The WLL RF processor of claim 1 or 5 or 6, wherein one of the plurality of CDMA modem chips is operated to function as a master and the other is operated as a slave so that only one CDMA modem chip designated as a master controls the WLL RF processor. WLL collective terminal device characterized in that for performing the functions such as automatic gain control, power control. The WLL group type terminal apparatus according to claim 1, wherein only one international WLL equipment identity (IWEI) is assigned. The WLL collective terminal apparatus according to claim 1, wherein a general subscriber telephone number assigned to an existing landline telephone is used as a WLL user identification number (IWUI). The reverse radio link channel configured by the WLL signal processing unit to communicate with the base station includes an access channel for code synchronization and a carrier synchronization with the base station and a reverse traffic channel for transmitting traffic data. The reverse traffic channel includes a reverse pilot, power control and signaling channel (PPCS) channel for processing power control, pilot signals and signaling information, and a reverse traffic information channel for processing actual valid information. The WLL signal processing unit, which consists of N modems, allocates only one PPCS channel, and multiple subscribers share and use the PPCS channel, and the reverse traffic channel has one channel for each N users. Allocate and use the frequency efficiency of radio channel resources The WLL-type group-type terminal apparatus, characterized in that to reduce the effect.