JPH09322232A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a radio terminal equipment to recognize a position and a state of other radio terminal equipment by sending number and attribute information of other radio terminal equipment belonging to the same radio zone as the radio terminal equipment requesting position registration while adding them to a position registration reception signal. SOLUTION: The radio communication system is made up of a public line 102 and a network controller 101. The network controller 101 acts like a central control station and a radio zone managed by each central control station is shown in an ellipse. Then a radio telephone set 103 and radio data terminal equipments 104-109 conducting data communication and communication of control data with other terminal equipment stations or the central control station are resident in the management zone. In the case that the central control station 101 receives a position registration request from the radio terminal equipment, the number and attribute of other radio terminal equipment belonging to the same radio zone as the concerned radio terminal equipment are extracted from a memory and they are added to a position registration reception signal and the resulting signal is sent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a location registration acceptance method for a wireless communication system.

[0002]

2. Description of the Related Art In recent years, with regard to digital radio communication systems, "Radio System Development Center (RCR)" has issued "Second Generation Cordless Telephone Number System Standard".
The standard is defined as (hereinafter, referred to as RCR STD-28). This RCR STD-28 defines the following service attributes with the wireless section interface between the wireless terminal (mobile station) and the centralized control station (base station) of the digital wireless communication system as the defining point. 3 as a delivery service used through the channel
2 kbps voice communication is shown.

Information transfer capability Voice transfer mode Circuit switching Information transfer rate 32 kbit / s Communication mode Point / Point Further, the communication protocol is divided into a call connection phase and a communication phase, and the call connection phase is further established to establish a link in a wireless section. And a service channel establishment phase for setting up a radio link for telephone services such as voice transmission and non-telephone services such as ISDN. The location registration in the service channel establishment phase related to the present invention will be described.

Location registration in the service channel establishment phase is performed by mobility management, which is a layer 3 function. The mobility management supports functions related to mobility support of wireless terminals, and performs location registration and authentication functions. The following messages are defined for the location registration function of mobility management.

(1) Location registration request message (2) Location registration acceptance message FIG. 17 is a sequence diagram showing control at the time of location registration.

A link channel establishment request message is transmitted from the wireless terminal on the control channel, and the central control station transmits a link channel assignment message to the mobile station. At this time, switch the synthesizer to change the carrier frequency,
Prepare for signal transmission to the specified communication physical slot.

In the same manner as receiving the link channel assignment message, the wireless terminal prepares for signal transmission, then transmits a synchronization burst signal to synchronize the physical slots for communication. When the link channel is established, the wireless terminal sends a location registration request message to the central control station.

FIG. 18 is an explanatory diagram showing the message format of the location registration request message. The PS number in the figure identifies the wireless terminal (mobile station PS) that has made the location registration request.

The centralized control station transmits an authentication message using an authentication random number, and the wireless terminal which receives the encrypted message encrypts it using an authentication key possessed by itself, and the authentication response message indicates the result of the authentication calculation to the centralized control station. To notify. In the centralized control station, if the authentication calculation results match and the other location registration conditions are satisfied, a location registration acceptance message is transmitted to the wireless terminal.

FIG. 19 is an explanatory diagram showing the message format of the location registration acceptance message. The location registration area report in the figure is used by the wireless terminal to register the paging area, and transmits the identification code and the reception level of the central control station which is not in communication. The incoming call group designation is used to designate the incoming call group from the centralized control station to the wireless terminal, and designates the incoming call group number.

As a publicly known document describing the prior art relating to the present invention, "Radio Equipment for Radio Stations of Low Power Data Communication Systems" (RCR STD-33A) from Radio System Development Center (RCR) is also available. However, in this, conditions up to the protocol are not described, and location registration is not mentioned.

Further, according to Japanese Patent Laid-Open No. 63-175535, a wireless line control device for controlling wireless line control of a wireless connection area consisting of one or more wireless zones, and a wireless line control device connected by a wired line, In a system including a wireless connection device provided in each of the above wireless zones and a wireless telephone connected to these wireless connection devices by a wireless line, the position registration request signal transmitted by the wireless telephone is received. If there is a plurality of wireless connection devices that interrupted the location registration request, the wireless network control device describes the method of notifying the wireless telephone by including the identification codes of the plurality of wireless connection devices in the location registration completion signal. There is.

[0013]

As described above, in the prior art, in response to a position registration request from a wireless terminal, the central control station accepts the position registration, and the wireless terminal numbers other than the wireless terminal that has issued the position registration request. Since there is no means for returning the wireless terminal attribute, the wireless terminal cannot know the position and status of other wireless terminals.For example, when transferring or when making a direct call between handset devices, There is a drawback in that it is not possible to judge whether the terminal is in its own wireless zone, whether the partner wireless terminal is within the range of radio waves, and what data type the partner wireless terminal can receive.

Further, in JP-A-63-175535,
It has been proposed to include the identification codes of a plurality of wireless connection devices in the position registration completion signal, but this information is effective for wireless communication via the wireless connection device, but not through the wireless connection device. This information cannot be used because it is information that is not related to direct calls between handset units.

An object of the present invention is to provide a wireless communication system in which a wireless terminal can know the position and attribute of another wireless terminal.

[0016]

According to the present invention, another wireless terminal number and a wireless terminal attribute belonging to the same wireless zone as the wireless terminal which has transmitted the position registration request are added to the position registration reception and transmitted. The problem is solved by the following means.

First, in claim 1 of the present invention, the centralized control station comprises a first storage means for storing a wireless terminal number belonging to each wireless zone managed by the central control station, and a second storage means for storing a wireless terminal attribute. Since the centralized control station has means for receiving a location registration request from the wireless terminal and means for returning a location registration acceptance to the wireless terminal, the centralized control station is able to communicate with the wireless terminal when the location registration request is received from the wireless terminal. The wireless terminal numbers and the wireless terminal attributes of other wireless terminals belonging to the same wireless zone are derived from the two storage means, and are added to the position registration reception and transmitted.

Further, in claim 2, the terminal type of the wireless terminal is added. Further, in claim 3, the data type that can be handled by the wireless terminal is added. Further, in claim 4, the wireless terminal stores the wireless terminal number and the wireless terminal attribute additionally transmitted to the location registration reception. Further, in claim 5, the wireless terminal displays the wireless terminal number and the wireless terminal attribute additionally transmitted to the location registration reception.

According to a sixth aspect, the wireless terminal is:
First storage means for storing its own wireless terminal number, second storage means for storing wireless terminal attributes, transmission means for transmitting a location registration request, and reception means for receiving a location registration acceptance from the central control station. With the above, the wireless terminal, when transmitting the location registration request, derives the wireless terminal number of itself from the first storage means and the wireless terminal attribute from the second storage means to perform location registration. I added it to the request and sent it.

Further, in order to achieve the above-mentioned object, the seventh aspect of the present invention effectively uses the flow of wireless digitization in the communication field.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In recent years, spread-spectrum communication has attracted particular attention among digital wireless communication systems. Spread spectrum communication is known as having high interference removal capability and excellent confidentiality by spreading information to be transmitted over a wide band. 2.4 around the world
Frequencies in the GHz band have been allocated for spread spectrum communications, and are becoming popular all over the world.

The spread spectrum communication system is roughly classified into a frequency hopping (FH) system and a direct spread (DH) system.
S) method is available. The former is to perform transmission using a wide band by changing the modulation frequency within a fixed time, and the latter is to spread-modulate the information to be transmitted with a pseudo-noise code at a speed that is ten to several hundred times that speed. It uses a wider band.

Therefore, an embodiment of the present invention provides a wireless communication system using frequency hopping spread spectrum communication for wireless communication between a centralized control station and the wireless terminal.

(System Configuration) FIG. 1 is an explanatory diagram showing the configuration of the wireless communication system of this embodiment.

From the perspective of wireless management, this wireless communication system has a central control station for managing and controlling communication between wireless terminals accommodated in the system, and a wireless terminal station wirelessly managed by this central control station. Based on the control data designated by the centralized control station using a wireless frame described later, the terminal stations that perform communication perform wireless communication with each other.

The centralized control station can be any one (or two or more) of the terminal stations in the system. Further, in this embodiment, the network control device is a central control station.

The individual terminals constituting the system will be described below.

This wireless communication system is a public line 102.
And a network control device 101 (extension number: 101, terminal type: network control, data type: voice) for accommodating and providing a public network communication service to a terminal station in the system, and this central control station or another terminal station. Wireless telephones 103 (extension number: 103, terminal type: telephone, exchanging control data or voice data between the two terminals, performing voice communication via the public line 102, and performing so-called extension communication between a plurality of terminal stations. (Data type: voice) and wireless data terminals 104 to 109 that perform control data communication and data communication with the centralized control station or other terminal stations.

In the following description, the wireless telephone,
Terminal stations such as wireless data terminals are collectively referred to as wireless terminals 110.
(General number of 104 to 109). Further, in FIG. 1, two network control devices 101 are shown, each of which functions as a central control station, and a wireless zone managed by each central control station is surrounded by an ellipse.

In the present embodiment, the wireless data terminal is a terminal device (data terminal) or a data input / output device having a function of transmitting data in bursts, and a wireless adapter that controls wireless communication. Alternatively, it refers to a terminal device that integrates them, and for example, a computer 104 (extension number: 104, terminal type:
Computer, data type: data), multimedia terminal 105 (extension number: 105, terminal type: multimedia, data type: voice, data, image), printer 1
06 (extension number: 106, terminal type: printer, data type: data), facsimile 107 (extension number: 10)
7, terminal type: facsimile, data type: fax, copying machine 108 (extension number: 108, terminal type: copy, data type: data), LAN gateway 10
9 (extension number: 109, terminal type: LAN gateway, data type: data, image), electronic camera,
Devices such as video cameras and scanners are applicable.

A major feature of this system is that these wireless telephones 110 can freely communicate with each other and can access the public network 102 at the same time. The detailed configuration and operation will be described below.

(1) Radio Telephone FIG. 2 is a block diagram showing the configuration of the radio telephone 103.

The main control unit 201 controls the entire radio telephone 103, and the memory 202 includes the main control unit 2
01, a call code (system ID) of the wireless communication system, an EEPROM for storing a sub ID of the wireless telephone, and a main control unit 20.
1 is provided with a RAM or the like that provides a work area for control.

The communication path unit 203 includes the input / output blocks of the handset 208, the microphone 209, the speaker 210, and the ADPC.
The interface of the M codec 204 is provided.

The ADPCM codec 204 converts the analog voice signal from the communication path unit 203 into an ADPCM code and the ADPCM coded information into an analog voice signal.

The channel codec section 205 uses the ADPC.
In addition to performing processing such as scrambling on the M-coded information, the information is time-division multiplexed into a predetermined frame.
The data assembled by the channel codec unit 205 into a later-described wireless frame is transmitted to the main apparatus and the target terminal station via the wireless unit.

The radio control unit 206 transmits / receives data to / from the radio unit 207, switches frequencies, detects carriers, detects levels,
It has a function to perform bit synchronization.

The radio section 207 is a channel codec section 2
In addition to modulating the digital information from 05 and converting it to a format that can be transmitted wirelessly and sending it to the antenna, it also demodulates information received wirelessly from the antenna and converts it into digital information.

The handset 208 is for inputting / outputting a voice signal for talking, and the microphone 209 is for collecting and inputting a voice signal. The speaker 210 loudspeaker-outputs the audio signal, and the display unit 212 displays the dial number input from the key matrix 211, the usage status of the public line, and the like. The key matrix 211 includes dial keys for inputting dial numbers and the like, and function keys such as an outside line key, a hold key, and a speaker key.

(2) Wireless Adapter FIG. 3 is a block diagram showing the internal structure of a wireless adapter connected to or built in the wireless data terminal devices 104 to 109.

In the figure, 301 is a wireless adapter 3.
02 and a peripheral device such as a printer and a facsimile, which are connected via a communication cable or an internal bus.

The wireless unit 303 of the wireless adapter 302 exchanges wireless signals with the wireless units of other wireless adapters, and the details will be described later.

The main control section 304 is a CP which is the center of control.
U, a peripheral device for performing interrupt control, DMA control, and the like, an oscillator for a system clock, and the like, and controls each block in the wireless adapter.

The memory 305 is composed of a ROM for storing a program used by the main control unit 304, a RAM used as a buffer area for various processes, and the like.

The communication i / f unit 306 is a communication i / f that is standardly equipped with the above-mentioned data terminal or peripheral device 301, for example, communication i such as RS232C, Centronics, LAN, etc.
/ F, an internal bus of a personal computer or a workstation, for example, an ISA bus, PCMCIAi / f
And the like to control the wireless adapter 302 to perform communication.

The timer unit 307 provides timing information used by each block inside the wireless adapter. The channel codec unit 308 not only performs assembling and disassembly of a radio frame as shown in FIG. 7, but also performs a simple error detection process represented by a CRC, a scramble process, a control of the radio unit 303, and the like.

The radio control unit 309 has a function of controlling transmission / reception switching of the radio unit 303, frequency switching, and the like, and also has a function of performing carrier detection, level detection, and bit synchronization.

The error correction processing unit 310 detects or corrects a bit or byte error that occurs in communication data due to various wireless environments. At the time of transmission, an error correction code is inserted into the communication data to convert the data into data. In addition to providing redundancy, an error position and an error pattern are calculated by a calculation process at the time of reception to correct a bit error generated in received data.

(3) Network Control Device FIG. 4 is a block diagram showing the internal configuration of the network control device 101.

The main control unit 401 is responsible for overall control of the network control device 101, and the memory 402 is a ROM for storing a program, a calling code (system ID) of the present wireless communication system, and the main control unit 401. It is a memory configured from a RAM or the like that stores various data for control and provides a work area for various calculations.

The line i / f unit 403 is a public network line 102.
This is an interface unit that performs public network line control such as power supply for accommodating a communication, selection command transmission, DC loop connection, PCM conversion, selection command reception, and call command transmission.

The ADPCM codec section 404 converts the analog voice signal received by the line i / f section 403 via the public network 102 into an ADPCM code, transfers the ADPCM code to the channel codec section 405, and at the same time the ADPCM from the channel codec section 405. The coded audio signal is converted into an analog audio signal.

The channel codec section 405 uses the ADPC.
The M-encoded information is subjected to processing such as scrambling, and is also time-division multiplexed into a predetermined frame. In this channel codec section 405, data assembled into a wireless frame described later is transmitted via the wireless section. This is transmitted to the control station and the target wireless terminal 110.

The radio control section 406 controls the transmission / reception switching of the radio section 407, frequency switching, etc., and also has the functions of carrier detection, level detection, and bit synchronization.

The radio section 407 includes a channel codec section 4
The framed information from 05 is modulated and converted into a format capable of wireless transmission and sent to the antenna, and the information wirelessly received from the antenna is demodulated and processed into digital information. The detection unit 408 detects various tones such as incoming call detection, loop detection, PB signal, dial tone, and ring tone.

(4) Radio Section FIG. 5 is a block diagram showing a radio section having a common configuration in the radio terminal 110 of the present system.

The transmitting / receiving antennas 501a and 501b are
The switch 502 is for efficiently transmitting and receiving radio signals, and the changeover switch 502 is for changing over the antennas 501a and 501b. A band pass filter (hereinafter referred to as BPF) 503 is for removing a signal in an unnecessary band, and a changeover switch 504 is for switching between transmission and reception.

The amplifier 505 is a receiving system amplifier,
The amplifier 506 is a transmission system amplifier with power control. The converter 507 is a 1st. The IF is a down converter, and the converter 508 is an up converter.

The changeover switch 509 is for switching between transmission and reception, and the BPF 510 is for removing a signal in an unnecessary band from the signal converted by the down converter 507. The converter 511 is
2nd. This is a down converter for IF, and the two down converters 507 and 511 constitute a double-conversion reception mode.

The BPF 512 is 2nd. For IF,
The 90-degree phase shifter 513 sets the output phase of the BPF 512 to 90 degrees.
It is a phase shift. The quadrature detector 514
A signal received by the BPF 512 and the 90-degree phase shifter 513 is detected and demodulated. Further, the comparator 515 is for shaping the output of the quadrature detector 514.

Further, a voltage-controlled oscillator (hereinafter referred to as VCO) 516 and a low pass filter (hereinafter referred to as LPF)
517, and a PLL 518 including a programmable counter, a prescaler, a phase comparator, and the like.
And form a frequency synthesizer for the receiving system.

Further, a VCO 519 for generating a carrier signal
A PLL 52 including an LPF 520, a programmable counter, a prescaler, a phase comparator, and the like.
1 and 1 constitute a frequency synthesizer for hopping.

Further, the VCO 5 of the transmission system having the modulation function
22, a LPF 523, a PLL including a programmable counter, a prescaler, a phase comparator, and the like.
A transmission system frequency synthesizer having a frequency modulation function is constituted by 524.

The reference clock oscillator 525 includes various PLLs.
The reference clocks for 518, 521 and 524 are supplied, and the baseband filter 526 is a band limiting filter for transmission data (baseband signal).

(Operation of Radio Frame) FIG. 7 is an explanatory diagram showing a channel configuration inside the frame used in this embodiment, and FIG. 8 is an explanatory diagram showing an internal configuration example of each channel.

First, in FIG. 7, CNT indicates a system control channel, LCCH indicates a logical control channel, and voice data is bidirectionally exchanged using two voice voice channels, and END indicates a frequency in the next frame. The guard time for changing the frequency for hopping is shown. As shown in FIG. 8, the frame used in this embodiment is composed of six channels of CNT, LCCH, two voice channels, a data channel, and END inside the frame.

In FIG. 8, CS is a carrier sense time of 12.8 usec, PR is a 56-bit preamble for bit synchronization acquisition, and SYN is 1 dummy bit +
A 31-bit frame synchronization signal defined by RCR, ID is a 63-bit calling signal defined by RCR + 1 dummy bit, UW is a 24-bit unique word (for capturing byte synchronization), and BF is 8-bit basic frame number information ( 1 to 20), WA is a field for writing the system address of a terminal station to be activated among the terminals in the sleep mode, NF is frequency information used in the next frame, and Rev is an area for discrimination from adjacent cells. Number, G
T is a guard time, CS0, CS1, and CS2 are carrier sense times, DA is a field for writing a system address, and the CRC of the system control channel is BF to Rev.
CRC information of the logical control channel is CRC information for data, CRC of the voice channel is CRC information for T / R, Data in the logical control channel is a field for writing control information, and Data in the data channel is Data.
a is a field for writing data to be transmitted, C
F is guard time for frequency switching, T / R is 32k
Indicates B-channel information in bps. The numbers in the figure represent the number of bits, and show an example of the length of each part.

The central control station transmits the CNT channel at the start of each frame, and stations other than the central control station receive the CNT channel in order to establish bit synchronization and frame synchronization. The LCCH channel is used for line connection and line disconnection,
It is used when exchanging a hopping pattern assignment request with the central control station prior to the line connection, or exchanging the hopping pattern assignment with the central control station when the line is disconnected. For connection or disconnection of the line, the system address of the partner who desires communication is written in the DA field provided in the LCCH channel, and the line is directly exchanged with the partner.

One of two voice channels is used for transmission, and the other is used for reception to realize a voice call. Which of the two is used for transmission
It is determined by making a meeting with the other party on the LCCH channel exchanged at the time of line connection. The data channel determines how to perform data transmission by meeting with the other party on the LCCH channel exchanged at the time of line connection.

(Frequency Hopping) FIG. 10 is an explanatory diagram showing an example of frequency hopping. In this figure, a system having eight base frames (hereinafter referred to as BF) and eight frequencies from F1 to F8 is used as an example. In each base frame, the frequencies used by the first HP, the second HP, and the third HP are shown. As shown in FIG. 10, each hopping pattern (hereinafter referred to as HP) does not use the same frequency in the same base frame, but always uses different frequencies. In addition, one frame includes one frame shown in FIG.
There is one, and each HP changes the frequency in a predetermined order every frame, that is, each time the base frame ends.

How to perform frequency hopping in the system will be described with reference to the drawings.

The hopping pattern in which the centralized control station transmits the system control channel is the first HP in FIG.
That is, F1 for BF1, F2 for BF2, BF
When it is 3, the frequency is changed for each BF, such as F3.

As shown in FIG. 11, all wireless terminals 110 other than the central control station first set the frequency to be set in the wireless section in BF1 in order to receive the system control channel transmitted by the central control station. HP of 1 sets to the frequency F1 used by BF1. All wireless terminals 110 other than the central control station establish frame synchronization with the system control channel received here.

The logical control channel for exchanging connection request and disconnection request for communication is exchanged at the same frequency as the system control channel. A terminal having control data such as communication line connection or communication line disconnection to be transmitted on the logical control channel transmits control data to the other party directly on the logical control channel when the terminal is on the logical control channel. In addition, a terminal that does not have data to be transmitted on the logical control channel always receives control data transmitted by another terminal on the logical control channel. If the received data is not control data addressed to the terminal itself, the received control data is discarded.

Radio terminal 11 for voice or data communication
0 performs communication on the voice channel and the data channel by changing to a frequency corresponding to the HP assigned in advance by the central control station. At this time, the same HP as the system control channel and the logical control channel may be allocated depending on the allocation status from the central control station. In the example shown in FIG. 11, the second HP is used for voice communication between the terminals AB with respect to the first HP of the system control channel and the logical control channel.
P is assigned, and the third H is used for data communication between the terminals AB.
An example in which P is assigned is shown. In this example, the frequency is changed three times during one frame.

FIG. 9 is an explanatory diagram showing an example of frequency hopping and a transmission / reception state in the voice channel.

Terminal A and terminal B in the first HP shown in FIG.
Shows that the terminals C and D are communicating with each other on the second HP. Terminals A and C transmit on the first voice channel of the two, and terminals B and D transmit on the second voice channel.

When the logical control channel is completed, the terminal in voice communication sets the frequency to be changed from the current base frame number in the radio section according to the frequency hopping pattern assigned by the system control channel. In addition, communication control information such as which is transmitted on the first voice channel is exchanged with a communication partner in advance, and transmission and reception of the wireless unit are controlled based on the communication control information. In the case of FIG. 9, terminal A and terminal C are transmitting on the first voice channel.

The case of BF1 will be described. When the logical control channel ends, the terminal A and the terminal C change the frequency according to the frequency hopping pattern assigned to each voice communication. As a result of changing the frequency, the first HP has been assigned to the terminal A and the terminal B, so that the frequency did not change, but the terminal C and the terminal D changed the frequency to F3. Terminal A and terminal C set the radio unit for transmission,
The terminal B and the terminal D set the radio unit for reception, and exchange audio data on the first audio channel.

At the end of the voice channel, terminals A and C set the radio section to reception, and terminals B and D set the radio section to transmission, and voice data is exchanged on the second voice channel. At the end of the second voice channel, in preparation for the next data communication, each terminal sets in the radio unit a frequency hopping pattern assigned to the radio unit for the data communication and a frequency derived from the current base frame.

After the end of the data channel, during END, in order to receive the system control channel in the next BF2, the frequency F2 used in BF2 is set in the radio section in the first HP. The procedure of frequency hopping after the base frame becomes BF2 repeats the above procedure.

(Structure and Operation of Channel Codec Unit) The channel codec unit is roughly divided into a channel codec for assembling data into a predetermined frame format and disassembling the frame, a radio unit for performing modulation / demodulation, and digital encoding of voice. / Consists of an ADPCM codec for decoding.

FIG. 12 is a block diagram showing the internal structure of the channel codec section. In the figure, a channel codec 3101 includes an audio input / output unit (headset) 3
The wireless communication unit 3129 is provided between an ADPCM codec 3103 to which the PC 102 is connected and a wireless unit 3129.

Then, the channel codec 3101 is
A CPU bus interface 3105 to which the CPU bus 3104 is connected, an ADPCM interface 3106 to be connected to the ADPCM codec 3103, a mode register 3107 for setting an operation mode, a hopping pattern register 3108, a frame number / next frequency number (BF / NF) Register 3109 and System I
It has a D register 3110, an intermittent activation terminal address register 3111, an LCCH register 3112, and a FIFO buffer 3113.

The timing generator 3114 and the CN
T channel assembling / disassembling unit 3115, LCCH (logical control channel) assembling / disassembling unit 3116, data assembling / disassembling unit 3117, voice assembling / disassembling unit 3118, frame synchronizing unit 3119, unique word detecting unit 3120
, CRC encoding / decoding section 3121, bit synchronization section 3122, radio control section 3123, intermittent reception control section 3121
124, a scramble / descramble 3125,
An AD converter 3126 that converts an analog reception signal from the radio unit 3129 into a digital signal, and a reception level detection unit 312 that detects a reception level based on an input from the AD converter 3126 and outputs an interrupt signal 3128
7 and.

The operation of the channel codec section will be described below with reference to FIG.

The reference of the operation timing of the channel codec section is generated by the timing generation section 3114 of the central control station side channel codec 3101. The central control station transmits a frame according to this timing, and the terminal station that has received the frame maintains frame synchronization according to a frame synchronization word.

The data sent from the centralized control station on the CNT channel is stored in the register inside the channel codec 3101. An HP (hopping pattern) register 3108, I
There are a D register 3110 and a WA (starting terminal address) register 3111. At the central control station, the CPU writes necessary values to these registers. Also, in synchronization with the operation timing, the frame number / next frame frequency number (BF
/ NF) The value inside the register 3109 is updated. NF
The frequency number written in the register is the hopping pattern (first hopping pattern) of the CNT channel. The channel codec 3101 reads the data in these registers at the timing of transmitting the data of the CNT channel, assembles the data in the CNT assembling unit 3115, and sends the data to the radio unit 3129.

On the other hand, in the terminal station, the radio section 3129
When the data is received through the CNT channel, the CNT is decomposed by the CNT decomposing unit 3115, and processing is performed using the received values of the respective units. Only when the received system ID matches the value written in the ID register 3110 of the own station, control is performed so as to receive the subsequent data. If the received WA matches the value of the WA register 3111 of the own station during the intermittent reception, an activation request interrupt is generated. Furthermore, the table of the hopping pattern register 3108 is rewritten using the received BF and NF information data.

Since the frequency number written in the NF field is that of the hopping pattern of the CNT channel, the hopping pattern used in the voice channel and the data channel is created based on the frequency number written in the NF field. Pattern register 3
108 is generated by time shifting.

In the LCCH channel, the transmitter side terminal 11
0 is the LCC inside the channel codec 3101
The data stored in the H register 3112 is
Assembled by the disassembly unit 3116 and transmitted to the wireless unit 3129 at a predetermined timing. The received LCCH data is disassembled by the LCCH assembling / disassembling unit 3116, and is temporarily stored in the LCCH register 3112 inside the channel codec.

In the voice channel, the voice input / output unit 3102
Is digitally encoded by the ADPCM codec 3103, and is taken into the channel codec 3101 via the ADPCM interface 3116. In the channel codec 3101, the data input in the voice assembling / disassembling unit 3118 is assembled and transmitted to the radio unit 3129 at a predetermined timing.

On the contrary, the voice data received from the radio unit 3129 is decomposed in the voice assembling / disassembling unit 3118,
ADPC via ADPCM interface 3106
It is output at the timing of the M codec 3103 and output to the audio input / output unit 3102.

In the data channel, data is transmitted only when the CPU makes a data transmission request. If a data transmission request has been made, the channel codec 3101
The CPU bus interface 3105 outputs a DMA request at a timing of one byte. When data is written by the DMA controller in response to the DMA request, the data assembling / disassembling section 3117 converts the data into serial data and the radio section 3129 at a predetermined timing.
To send to.

On the contrary, when the data is received, the data assembling / disassembling unit 3117 converts the data into parallel and outputs the DMA request for each byte.
The controller transfers the received data to the memory. When the transfer of one frame of data is completed, an interrupt is generated for the CPU.

At the time of data transmission, the CRC code generator 3121 generates a CRC code as necessary, stores it in the CRC field, and transmits it. The receiving side can check the CRC and detect the occurrence of an error. Also,
All transmission data other than the frame synchronization word and the unique word are scrambled by the scrambler 3125. This is to reduce the unbalance of the data sent to the radio unit 3129 and to facilitate the extraction of the synchronous clock.

On the contrary, when receiving the data, when the unique word is detected, the descrambler 3125 is set at that timing.
At the same time, a CRC check is performed, and at the same time, data is input to the decomposing unit of each field.

As described above, the voice and data are wirelessly transmitted in accordance with the predetermined frame.

The specific operation of this system at the time of location registration will be described below.

1. Position registration processing at power-on (1) Position registration sequence of centralized control station and terminal station at power-on FIG. 13 is a sequence diagram showing operations of the control station and terminal station at power-on in the present system. . In this sequence, the network control device 101 is used as a central control station,
The wireless terminal 110 (wireless telephone 103) is used as a terminal station.

When the power supply is turned on in S5101, and the network control device 101 is initialized, the network control device 10
1 determines whether it is a centralized control station or a terminal station, recognizes that it is a centralized control station, measures the radio wave environment, determines the hopping pattern from this measurement result,
It is stored in the memory 402. Then, the synchronization signal, the calling signal defined by the RCR, the next hopping pattern information, the area number of the user, etc. are retrieved from the memory 402,
It is assembled into the system control channel (CNT) frame of FIG. 8 and output from the radio unit 407 as a CNT frame at every predetermined timing.

Similarly, when the wireless terminal 110 recognizes that it is a terminal station after the wireless terminal 110 is started up, it prompts the user to input the wireless terminal number and wireless terminal attribute of the own terminal, and the wireless terminal automatically or manually input. Memory number and wireless terminal attributes 202
To memorize.

As the wireless terminal number, a wireless terminal identification number assigned so as not to be duplicated for each wireless terminal or an extension number used in a private branch exchange system is used. In the case of the wireless telephone 103, the extension number is 10 as the wireless terminal number.
3. As the wireless terminal type, terminal type: telephone or data type: voice is input.

When this process ends, the CN from the control station
Wait for T frames at any frequency. Upon receiving the CNT frame from the centralized control station, the terminal station stores the received frequency in the memory 202 and acquires the frequency to hop to the next unit time based on the NF in this frame. The terminal station changes the reception frequency based on the received frequency and waits for the next CNT frame. The terminal station repeats this process, recognizes the hopping pattern used by the centralized control station, and stores it in the memory 202.

When the storage of the hopping pattern is completed in the terminal station, the terminal station notifies the centralized control station as a new terminal station using the logical control channel (LCCH) frame shown in FIG. 8 in S5102. At this time, the global address received by all the central control stations and terminal stations is added to DA of the LCCH frame, and Dat
The location registration request message, the wireless terminal number and the wireless terminal attribute are set in a, indicating that new registration is to be performed, and the message is transmitted.

The central control station receives the LCCH frame, and if DA in it receives a global address, Dat
If there is a location registration request message from the contents of a,
The wireless terminal number and the wireless terminal attribute are stored in the memory 402,
Register new.

FIG. 6 is an explanatory diagram showing the first storage means for the wireless terminal number and the second storage means for the wireless terminal attribute provided in the memory 402.

When this registration is completed, the centralized control station notifies the terminal station, which has newly registered the location, of acceptance permission by using the LCCH frame in S5103. LCCH at this time
Enter the wireless terminal number in the DA of the frame, and
The registration is accepted by setting the wireless terminal number and the location registration acceptance message of the centralized control station, the wireless terminal number and the wireless terminal attribute of another wireless terminal belonging to the wireless zone extracted from the first storage means and the second storage means. It indicates and sends.

When the terminal station receives the wireless terminal number of the centralized control station by the LCCH frame, it stores the wireless terminal number of the centralized control station and the wireless terminal numbers and wireless terminal attributes of other wireless terminals. In step S5104, the centralized control station is notified of start-up completion using the LCCH frame. The first and second storage means in the terminal station are shown in FIG.
The configuration is the same as described above. When the centralized control station receives the startup completion notification from the terminal station, it shifts to normal processing.

At the terminal station, after the start-up completion notice is output, the call from the terminal station becomes possible in S5105.

(2) Location Registration Accepting Operation at Power-on in Centralized Control Station FIG. 14 is a flowchart showing the location registration accepting operation at the time of turning on the power in the centralized control station.

When the power supply of the network control device is turned on in S5201, the network control device is initialized in S5202 to be in an operating state. As a result of this processing, when it is recognized that the network control device is the centralized control station in S5203, processing for storing information such as the wireless terminal number of the own terminal and the wireless terminal attribute is performed in S5204. As a means for inputting, a value set by a DIP switch or the like at the time of startup is stored, a value input by a dial key of a telephone or the like is stored, or a value is input by a keyboard of a computer or the like. It is conceivable to receive the stored value via the bus and store it.

When this address information is received,
It is determined whether the value input in S5205 is valid,
If the address information is not valid, a process of storing the address information is performed again in S5204.

When it is confirmed that the wireless terminal number and wireless terminal attribute stored in S5205 are valid, S5
A process for determining the hopping pattern used in 206 is performed. At this time, the centralized control station carries out carrier sensing on all of the predetermined usable frequencies, and selects a predetermined number of frequencies with good radio wave conditions as a hopping pattern.

If the predetermined hopping pattern cannot be acquired in S5207, it is determined in S5211 whether a predetermined time has elapsed. If the predetermined time has not elapsed, S52
At 06, the process for determining the hopping pattern is continued. When it is detected in S5211 that the predetermined time has elapsed, the central control station notifies in screen display or sound that the hopping pattern could not be determined in S5212.

After this processing, if there is a request to determine the hopping pattern again in S5213, the processing for determining the hopping pattern is performed in S5206. S52
If there is no request for retry in 13, it is notified in S5212 that the hopping pattern cannot be determined.

When the predetermined hopping pattern can be acquired in S5207, the process for assembling the CNT frame is performed in S5208. CNT frame is sync signal I
It is a frame including D, area number, and frequency information.

When the assembly of this CNT frame is completed,
The process of transmitting the CNT frame is performed using one frequency of the hopping patterns determined in S5210, and the process shifts to the normal process of transmitting the CNT frame while changing the frequency based on the HP determined in S5211.

(3) Operation at the time of terminal station location registration in the centralized control station FIG. 15 is a flowchart showing the operation at the time of terminal station location registration in the centralized control station.

During normal processing in S5301, S5302 is executed.
When the central control station receives the LCCH frame and the DA has an address addressed to its own terminal or all terminals (global), the centralized control station executes an instruction to take out the control data in the received LCCH frame.

When it is confirmed in S5303 that the control data received is the location registration request message from the terminal station, the confirmation processing of the wireless terminal number and the wireless terminal attribute transmitted together with the location registration request message is performed in S5304.
Then, as a result of the confirmation, when it is detected that the information is normal in S5305, the centralized control station performs the processing for registering the wireless terminal number and the wireless terminal attribute in the memory 402 in S5306, and stores the information.

If it is detected in S5305 that it is not normal, a process for discarding the location registration request received in the LCCH frame is performed in S5310, and then S5301 is executed again.
To perform normal processing.

When the registration of the wireless terminal number and the wireless terminal attribute is completed in S5306, the central control station wireless terminal number and the wireless terminal numbers of other wireless terminals belonging to the wireless zone extracted from the storage means using the LCCH frame in S5307. The wireless terminal attribute is entered in Data, the wireless terminal number is entered in DA, and a location registration acceptance message is transmitted to the terminal station.

[0124] The LCCH from the terminal station which has completed the reception in S5308 after transmitting the location registration reception message in S5307.
If the startup completion notification signal using the frame cannot be confirmed, it is detected in S5311 whether a predetermined time has elapsed. If the predetermined time has not passed, the start-up completion notification using the LCCH frame from the terminal station is waited for in S5308.

If a predetermined time has passed after the notification of the centralized control station wireless terminal number to the terminal station in S5311, S5
At 307, processing for notifying the terminal station of the central control station wireless terminal number using the LCCH frame is performed again.
When the start-up completion notification signal from the terminal station is detected in S5308, the location registration completion process of the terminal station is performed in S5309, and the process proceeds to the normal process.

(4) Operation at Power-on of Terminal Station FIG. 16 is a flowchart showing the operation at power-on of the terminal station.

When the power of the wireless terminal 110 is turned on in S5401, the wireless terminal 110 is initialized in S5402 to be in an operating state. As a result of this processing, when it is recognized that the wireless terminal 110 is a terminal station in S5403, S540
In step 4, processing for storing information such as the wireless terminal number of the terminal itself and the wireless terminal attribute is performed. The means for determining the terminal station, the central control station, and the means for inputting the area information and the terminal address information include a case in which a value set by a DIP switch or the like at the time of startup is stored, It is conceivable to store the input value or to receive and store the value input via a keyboard of a computer or the like via a bus.

When the information is read, it is determined in S5405 whether the input value is valid. If it is not valid, the information is stored again in S5404.

When it is confirmed that the wireless terminal number and the wireless terminal attribute stored in S5405 are valid, S5
Processing for acquiring the hopping pattern used in 406 is performed.

At S5406, the CNT from the central control station is sent.
In order to receive a frame, it shifts to a reception standby state at an arbitrary frequency. When the CNT frame from the centralized control station can be received at that frequency, the area number is recognized from the Rev section in the CNT frame and stored in the memory 202.

Next, the frequency hopping in the next unit time is acquired from the NFR part in the CNT frame, the terminal station moves the received frequency to that frequency, and waits for the next CNT frame. The terminal station repeats this operation, recognizes the centralized control station to which it belongs, recognizes the frequency hopping pattern, and stores it.

As a result of the hopping pattern acquisition processing in S5406, if the hopping pattern cannot be acquired in S5407, a warning sound or screen display is used to notify the user that the hopping pattern could not be acquired in S5413. Then, the process is performed for the user in step S5406 to acquire the hopping pattern.

When it is detected in S5407 that the hopping pattern has been acquired, a processing for notifying the central control station of the wireless terminal number and the wireless terminal attribute is performed using the LCCH frame in S5408. Here, using the LCCH frame, the global address received by all terminals is written in DA in this frame, and the location registration request message and the wireless terminal number and wireless terminal attribute are added to Data and transmitted to the centralized control station.

After transmitting this signal, the terminal station receives the LCCH frame while changing the frequency according to the hopping pattern acquired in S5409. And S5410
If the same wireless terminal number as the own terminal cannot be confirmed in the DA in the LCCH frame received in step S5414, it is monitored in step S5414 whether a predetermined time has elapsed after sending the own wireless terminal number.

When the predetermined time has not elapsed,
The process for receiving the central control station wireless terminal number in the LCCH frame from the central control station is continued. In addition, S54
When it is detected that the predetermined time has elapsed in 14, S5408
Then, the processing for notifying the centralized control terminal of the location registration request message is performed again using the LCCH frame.

At S5410, the own wireless terminal number is detected in DA in the LCCH frame from the centralized control station, and
When the location registration acceptance message is confirmed in Data, the wireless terminal identification number and the wireless terminal attribute of another wireless terminal belonging to the notified wireless zone are set in the memory 202.

The display unit 2 also displays the wireless terminal identification numbers and wireless terminal attributes of other wireless terminals belonging to the notified wireless zone.
12 to display and notify the user.

In S5411, the LCCH is sent to the central control station.
In the DA of the frame, the wireless terminal number of the centralized control station, Data
A signal indicating the completion of start-up is placed on and the LCCH frame is transmitted. When the output of this signal is completed, S5412
Then, the process proceeds to the intermittent reception process.

[0139]

As described above, according to the first to third inventions of the present application, when the central control station receives the location registration request from the wireless terminal, it belongs to the same wireless zone as the wireless terminal. By guiding other wireless terminal numbers and wireless terminal attributes from the storage means, adding them to the location registration reception, and transmitting them,
Knowing other wireless terminal numbers and wireless terminal attributes existing in its own wireless zone, for example, when performing wireless communication with voice and image, a wireless terminal capable of performing voice and image communication from the wireless terminal attribute of the other party to wirelessly communicate. Is preferable, and it is possible to easily select a partner for wireless communication and surely perform desired wireless communication media communication.

According to the fourth and fifth inventions of the present application, the wireless terminal activates the wireless terminal by storing and displaying the wireless terminal number and the wireless terminal attribute additionally transmitted to the location registration reception. It has the effect that it can also be used with other services.

Further, according to the sixth invention of the present application, when the wireless terminal transmits the position registration request, the wireless terminal derives its own wireless terminal number and wireless terminal attribute from the storage means and adds them to the position registration request. The centralized control station has the effect of accurately grasping the state of each wireless terminal when the wireless terminal enters the wireless zone. Further, according to the seventh invention of the present application, by using the digital wireless technology, the amount of wireless data transmission is dramatically increased, and a large number of wireless terminal numbers and wireless terminal attributes additionally transmitted to the location registration reception are generated. Even if there is, there is an effect that control data can be exchanged.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of the wireless telephone according to the embodiment.

FIG. 3 is a block diagram showing an internal configuration of the wireless adapter of the embodiment.

FIG. 4 is a block diagram showing an internal configuration of the network control device of the embodiment.

FIG. 5 is a block diagram showing an internal configuration of a wireless unit of the above embodiment.

FIG. 6 is an explanatory diagram showing contents of a storage unit of the above embodiment.

FIG. 7 is an explanatory diagram showing a channel configuration inside a frame used in the above embodiment.

FIG. 8 is a block diagram showing an internal configuration of each channel of the above embodiment.

FIG. 9 is an explanatory diagram showing an example of hopping of a voice channel and a transmission / reception state in the above embodiment.

FIG. 10 is an explanatory diagram showing an example of frequency hopping in the above embodiment.

FIG. 11 is an explanatory diagram showing a usage state of frequencies of each channel in the above-described embodiment.

FIG. 12 is a block diagram showing a configuration of a channel codec unit of the above embodiment.

FIG. 13 is a sequence diagram showing a position registration operation when power is turned on between the centralized control station and the terminal station of the above embodiment.

FIG. 14 is a flowchart showing an operation when the power is turned on in the centralized control station of the above embodiment.

FIG. 15 is a flowchart showing an operation at the time of terminal station location registration in the centralized control station of the above embodiment.

FIG. 16 is a flowchart showing an operation at power-on in the terminal station of the above embodiment.

FIG. 17 is a sequence diagram showing an example of a conventional location registration operation.

FIG. 18 is an explanatory diagram showing the contents of a location registration request message of the above embodiment.

FIG. 19 is an explanatory diagram showing the contents of a location registration acceptance message of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 ... Network control apparatus 102 ... Public line 103 ... Wireless telephone 104 ... Computer 105 ... Multimedia terminal 106 ... Printer 107 ... Facsimile 108 ... Copy machine 109 ... LAN gateway

Claims (7)

[Claims] 1. A wireless communication system having a centralized control station that manages and controls wireless communication, and a plurality of wireless terminals that perform wireless communication with the centralized control station, wherein the centralized control station manages each wireless zone. First storing means for storing the wireless terminal numbers of the other wireless terminals belonging to the wireless terminal, second storing means for storing the wireless terminal attributes retrieved from the wireless terminal numbers, and a position registration request from the wireless terminals. And a reply means for returning a position registration acceptance to the wireless terminal, wherein the central control station belongs to the same wireless zone as the wireless terminal when receiving the position registration request from the wireless terminal. The wireless terminal number of another wireless terminal is derived from the first storage means, the wireless terminal attribute is derived from the second storage means, and is added to the location registration acceptance and transmitted. Wireless communication system. 2. The wireless communication system according to claim 1, wherein the centralized control station adds the terminal type of the wireless terminal as the wireless terminal attribute and transmits the attribute. 3. The wireless communication system according to claim 1, wherein the centralized control station adds a data type that the wireless terminal can handle as the wireless terminal attribute and transmits the attribute. 4. The wireless communication system according to claim 1, wherein the wireless terminal stores a wireless terminal number and a wireless terminal attribute of another wireless terminal additionally transmitted to the location registration acceptance. 5. The wireless communication system according to claim 1, wherein the wireless terminal displays a wireless terminal number and a wireless terminal attribute of another wireless terminal additionally transmitted to the location registration reception. 6. A wireless communication system having a centralized control station that manages and controls wireless communication, and a plurality of wireless terminals that perform wireless communication with the centralized control station, wherein the wireless terminal stores its own wireless terminal number. And a second storage unit that stores a wireless terminal attribute, a transmission unit that transmits a location registration request, and a reception unit that receives a location registration acceptance from the central control station. When the terminal transmits a location registration request, the terminal derives the wireless terminal number of itself from the first storage means, derives the wireless terminal attribute from the second storage means, and adds and transmits the location registration request to the location registration request. A wireless communication system. 7. The wireless communication according to claim 1, wherein a frequency hopping spread spectrum communication method is used for wireless communication between the central control station and the wireless terminal. system.