JPH10112881A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent useless transmission processing by managing other terminal station with in a reach of a radio wave from its own terminal station based on control data received from a centered control station and the other terminal station in the system consisting of the centered control station and a plurality of terminal stations. SOLUTION: This radio communication system comprises a network controller 101 that contains a public lien 102 and provides a public network communication service to terminal stations in the system, a radio telephone set 103, and radio data terminals 104-109 or the like formed by adding and connecting a radio adaptor of computers, facsimile equipments, and LAN gate ways of the like. One or two optional terminal stations in the system act like a centered control station. The centered control station and each terminal station of the terminal stations make communication by using a radio frame designated by the centered control station and control data of its own station are sent or control data of other terminal stations are received. The terminal stations confirm a communication available terminal station for each prescribed time and when a radio wave is not within a reach between the terminal stations, no call origination request is made to the centered control station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system having a central control station and a plurality of terminal stations.

[0002]

2. Description of the Related Art Conventionally, in a radio communication system having a centralized control station for controlling the entire system and a plurality of terminal stations connected to the centralized control station by radio, the centralized control station and each terminal station are connected to each other. In addition to communication, it is possible to perform communication between terminal stations.

[0003] In a radio communication system having a centralized control station as described above, in particular, each terminal station performs communication between the terminal stations exclusively under the control of the centralized control station. That is, the position and state of each terminal station accommodated in the system are collectively managed by the central control station, and the two terminal stations are controlled based on data designated by the central control station using a predetermined radio frame. The two perform wireless communication with each other.

[0004]

However, in a system in which the management of communication between terminal stations is collectively entrusted to a central control station as described above, the following inconveniences may occur depending on the state of each terminal station. Occurs.

For example, as shown in FIG. 14, a central control station 104-A has two mobile terminal stations 104-B and 104-C.
In a conventional system that collectively manages all communication between the central control station 104-A and the mobile terminal station 104-B, and between the central control station 104-A and the mobile terminal station 104-C, communication is possible. State, but the mobile terminal station 104-B
It is assumed that radio waves have not reached between the mobile terminal 104 and the mobile terminal station 104-C.

In this case, mobile terminal stations 104-B, 104
-C cannot communicate with each other. However, from the central control station 104-A, each mobile terminal station 104-B, 104-
Since C has been recognized, one mobile terminal station (for example, 1
When the transmission request is received from the terminal 04-B), the transmission request is accepted even though the communication is not possible, and the terminal station performs useless transmission processing.

FIG. 15 is an explanatory diagram showing a communication procedure example in the case of performing communication by the frequency hopping method as a specific example of such an operation.

First, in 9001, when a request to acquire a hopping pattern (HP) is made from one mobile terminal station 104-B, the central control station 104-A transmits
Confirms the presence of the terminal station 104-C,
To the hopping pattern.

The terminal station 104-B receives this notification at 9003, and transmits a connection request to the terminal station 104-C using the received hopping pattern. Here, if there is no response from the other party, a connection request is output several times,
If there is still no response, the hopping pattern notified in 9004 is notified to the central control station 104-A.

In response to the notification, the central control station 104-A performs a hopping pattern release process at 9005.
When communication between extensions is performed as described above, the central control station 10
In the case of 4-A, since the terminal station of the other party can be recognized, even if the communication cannot be actually performed between the extensions, the terminal station performs the transmission processing and the frequency is output wastefully. Become.

An object of the present invention is to prevent useless transmission processing in a wireless communication system having a central control station and a plurality of terminal stations.

[0012]

According to the present invention, in a radio communication system having a central control station for controlling the entire system and a plurality of terminal stations connected to the central control station by radio, the terminal station comprises: Transmitting means for transmitting control data to the central control station and other terminal stations; receiving means for receiving control data from the central control station and other terminal stations; and Management means for managing another terminal station to which a radio wave reaches from the terminal station.

The terminal station includes terminal information transmitting means for transmitting terminal information of the terminal station itself to control data and other terminal stations by including the terminal information in control data, and receiving by the receiving means. Terminal information detecting means for detecting terminal information from the central control station and other terminal stations included in the control data thus obtained, and terminal information storing means for storing the detected terminal information.

Further, the terminal station has a timer means for performing a time counting process for a predetermined time when the terminal station shifts to an operating state, and when the elapse of the predetermined time is detected by the time counting means, To other terminal stations using transmission means,
It is characterized by transmitting terminal information of its own terminal station.

Further, in the terminal station, the value of the predetermined time is changed based on the terminal information. Further, when performing communication from the terminal station to the central control station and other terminal stations, only when the terminal information of the partner terminal station matches the terminal information stored in the storage means, And performing a process for communicating with the server.

Further, after the terminal station stores the terminal information of another terminal station, if the terminal information is not transmitted within a predetermined time from the stored terminal station, the registration of the other terminal station is performed. It is characterized by being deleted.

Further, the terminal station transmits terminal information of the terminal station to another terminal station by using the transmitting means when the terminal station is activated. Further, in the terminal station, a transmission interval of terminal information of the terminal station is changed depending on a frequency of use of the terminal.

Further, the central control station and each terminal station perform radio communication by a frequency hopping method, and the control data is transmitted and received using a basic hopping pattern.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION In this embodiment, a digital radio communication system based on a frequency hopping method will be described in detail. (System Configuration) FIG. 1 is an explanatory diagram showing the configuration of the wireless communication system of the present embodiment.

The wireless communication system includes a central control station for managing and controlling communication between terminals accommodated in the system,
It is composed of a plurality of terminal stations, based on control data specified by a central control station using a radio frame described later,
Terminal stations that perform communication perform wireless communication.

The central control station can be any one (or two or more) of the terminal stations in the system. In this embodiment, the wireless data terminal (1) shown in FIG.
04-109) will be the central control station.

This wireless communication system uses a public line 102.
, And exchanges control data or voice data between the network control device 101 for providing a public network communication service to a terminal station in the system and this central control station or another terminal station. Make a voice call,
A wireless telephone 103 for performing a so-called extension call between a plurality of terminal stations, and a wireless data terminal 1 for performing control data communication and data communication between a central control station or another terminal station.
04-109.

In the following description, a wireless telephone,
Terminal stations such as wireless data terminals are collectively referred to as wireless terminals 110.
(General number of 104 to 109).

In this embodiment, the wireless data terminal 104 is a device in which a terminal device (data terminal) or a data input / output device having a function of transmitting data in a burst manner is connected to a wireless adapter for wireless communication. Or a terminal device integrating them, for example, the computer 104 and the multimedia terminal 1 shown in the figure.
05, printer 106, facsimile 107, copier 1
08, LAN gateway 109, electronic camera,
Devices such as video cameras and scanners correspond to this.

The wireless telephone 103 and the wireless data terminal 104 can freely communicate with each other, and at the same time, can access the public network 102, which is a great feature of the present system.

The detailed configuration and operation will be described below. (1) Wireless Telephone FIG. 2 is a block diagram showing a configuration of the wireless telephone 103.

The main control unit 201 controls the overall operation of the wireless telephone 103, and the memory 202 stores the main control unit 2.
ROM (Read Only) storing the control program No. 01
Memory), the call code of the wireless communication system (System I
D) EEPROM for storing the sub-ID of the wireless telephone
(Electrically Erasable Programmable Read Only Mem
ory) and R for providing a work area for control such as storing terminal type information in the processing of the main control unit 201.
It is composed of an AM (Ramdom Access Memory) and the like.

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

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

Frame processing unit (channel codec) 2
Numeral 05 performs processing such as scrambling on the ADPCM-encoded information, and time-division multiplexes this into a predetermined frame. The data assembled into a wireless frame, which will be described later, by the frame processing unit 205 is transmitted to the main device and the target terminal station via the wireless unit.

The radio controller 206 controls transmission / reception and frequency switching of the radio unit 207, carrier detection, level detection,
It has a function to perform bit synchronization.

The radio unit 207 modulates the digital information from the frame processing unit 205, converts it into a format that can be transmitted wirelessly, sends it to the antenna, and demodulates the information received wirelessly from the antenna and converts it into digital information. It is.

The handset 208 inputs and outputs a voice signal for talking, and the microphone 209 collects and inputs the voice signal. The speaker 210 loudspeaker-outputs the audio signal, and the display unit 211 displays the dial number input from the key matrix 212, the usage status of the public line, and the like. The key matrix 212 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 an internal configuration of a wireless adapter connected to or incorporated in the wireless data terminal devices 104 to 109.

In the figure, reference numeral 301 denotes 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 section 303 of the wireless adapter 302 exchanges wireless signals with the wireless section of another wireless adapter, and the details will be described later.

The main control unit 304 controls the CP which is the control center.
U, interrupt control and DMA (Direct Memory Acces
s) It is composed of a peripheral device for performing control and the like, a system clock oscillator, etc., and controls each block in the wireless adapter.

A memory 305 is a ROM for storing a program used by the main control unit 304, a call code (system ID) of the wireless communication system, and a sub-I of the wireless telephone.
D, an RAM for providing a circulating area for control such as storing terminal type information in the processing of the main control unit 304, and the like.

Communication i / f (interface) unit 306
Is a communication i / f provided as a standard feature of the above-mentioned data terminal or peripheral device 301, for example, a communication i / f such as RS232C, Centronics, LAN, etc., or an internal bus of a personal computer or a workstation, for example, an ISA bus, PCMCIAi / wireless adapter 30 using f
Numeral 2 controls the communication.

The timer unit 307 provides timing information used by each block in the wireless adapter. The channel codec unit 308 not only assembles and disassembles a radio frame as shown in FIG. 5 but also performs a CRC (Cyclic
Redundancy Check), simple error detection processing, scrambling processing, control of the radio unit 303, and the like are performed.

The radio control unit 309 controls the switching of transmission / reception of the radio unit 303, frequency switching, and the like, and 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 occurring in communication data due to various wireless environments. At the time of transmission, an error correction code is inserted into the communication data and the data is inserted into the data. In addition to providing redundancy, at the time of reception, a bit error occurring in received data is corrected by calculating an error position and an error pattern by arithmetic processing. (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 controls the overall control of the network control device 101, and the memory 402 stores the main control unit 4
ROM for storing a program used by the wireless communication system 01, an EEPROM for storing a call code (system ID) of the wireless communication system, a sub-ID of the wireless telephone, and storing terminal type information in the processing of the main control unit 401. And a RAM for providing a sunk area for the control.

The line i / f unit 403 is connected to the public network line 102.
This is an interface unit that performs public network line control such as power supply for accommodating a power supply, transmission of a selection command, DC loop connection, PCM (Pulse Code Modulation) conversion, selection command reception, and call command transmission.

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

The channel codec section 405 has an 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 unit 406 controls switching of transmission / reception of the radio unit 407, frequency switching, and the like, and also has a function of performing carrier detection, level detection, and bit synchronization.

The radio section 407 includes the channel codec section 4
In addition to modulating the framed information from 05 and converting it to a format that can be wirelessly transmitted and sending it to the antenna, 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.

(Operation of Radio Frame) FIG. 5 is an explanatory diagram showing an example of a channel configuration inside a frame used in the radio communication system of this embodiment.

In the figure, CNT indicates a system control channel, LCCH indicates a logical control channel, two-way audio data is exchanged using two audio channels, and large-capacity data communication is performed using the data channel. I do. END indicates a guard time for changing the frequency in order to perform frequency hopping in the next frame. As shown in the figure, in the frame used in the present system, the inside of the frame is composed of six channels of CNT, LCCH, two voice channels, data channel, and END.

FIG. 6 is an explanatory diagram showing an example of the internal configuration of each channel.

First, CS is a carrier sense time for 12.8 usec, PR is a 56-bit preamble for capturing bit synchronization, SYN is a 31-bit frame synchronization signal defined by one dummy bit + RCR, and ID is defined by RCR. 63-bit calling signal + 1 dummy bit,
UW is a 24-bit unique word (for capturing byte synchronization), and BF is 8-bit basic frame number information (1-2 bits).
0), WA is a sleep mode terminal.
A field for entering the system address of the terminal station to be started, NF is frequency information used in the next frame, Re
v is an area number for distinction from an adjacent cell, GT 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 C for BF to Rev.
RC information, CRC of logical control channel is CRC information for data, CRC of voice channel is C for T / R
RC information, CF is guard time for frequency switching, T
/ R indicates 32 kbps B channel information. The numbers in the figure represent the number of bits, and show an example of the length of each part.

The CNT channel is transmitted by the central control station at the start of each frame, and stations other than the central control station always receive the CNT channel to establish bit synchronization and frame synchronization. The LCCH channel is used for initial registration of the terminal station,
It is used when exchanging a hopping pattern assignment request with the central control station prior to radio channel connection, radio channel disconnection, radio channel connection, or exchanging hopping pattern assignment with the central control station when the radio channel is disconnected. To connect or disconnect a wireless channel, use L
The system address of the partner who desires communication is written in the DA field provided in the CCH channel, and the terminal directly communicates with the partner.

When performing data communication with all terminals (regardless of control station or terminal station) accommodated in the system, write a global address that can be recognized by all terminals in the DA field, and A control request, such as a registration request and type information, is placed in the section and the LCCH is transmitted.

The voice channel realizes a voice call by using one of the two for transmission and receiving the other. Which of the two is used for transmission is determined by 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.

(Explanation of Configuration and Operation of Channel Codec (CHC) Unit) The CHC unit is roughly divided into a channel codec for assembling data into a predetermined frame format, decomposing a frame, a radio unit for performing modulation / demodulation, and a voice signal. It is composed of an ADPCM codec that performs digital encoding / decoding.

FIG. 7 is a block diagram showing the internal configuration of the CHC unit. Referring to FIG.
1 is provided between an ADPCM codec 1103 to which an audio input / output unit (headset, handset, microphone, speaker, etc.) 1102 is connected, and a radio unit 1129.

Then, the channel codec 1101
A CPU bus interface 1105 to which a CPU data bus 1104 is connected;
3 connected to ADPCM 1106
A mode register 1107 for setting an operation mode;
A hopping pattern register 1108, a frame number / next frequency number (BF / NF) register 1109, a system ID register 1110, an intermittent activation terminal address register 1111, an LCCH register 1112, and F
And an IFO buffer 1113.

Further, the timing generation unit 1114 and the CN
T channel assembling / disassembling section 1115, LCCH (logical control channel) assembling / disassembling section 1116, data assembling / disassembling section 1117, voice assembling / disassembling section 1118, frame synchronizing section 1119, unique word detecting section 1120.
, CRC encoding / decoding section 1121, bit synchronization section 1122, radio control section 1123, intermittent reception control section 1
124, a scramble / descramble 1125,
An AD converter 1126 that converts an analog reception signal from the radio unit 1129 into a digital signal, and a reception level detection unit 112 that detects a reception level based on an input from the AD converter 1126 and outputs an interrupt signal 1128.
And 7.

Hereinafter, the operation of the CHC unit will be described with reference to FIG.

The reference of the operation timing of the CHC unit is generated by the timing generation unit 1114 of the channel codec 1101 on the central control station side. 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.

Data sent from the central control station via the CNT channel is stored in a register inside the channel codec 1101. In the channel codec 1101, an HP (hopping pattern) register 1108, I
There are a D register 1110 and a WA (starting terminal address) register 1111. At the central control station, the CPU writes necessary values to these registers.

The value in the frame number / next frame frequency number (BF / NF) register 1109 is updated in synchronization with the operation timing. The frequency number written in the NF register is the hopping pattern (first hopping pattern) of the CNT channel. The channel codec 1101 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 1115, and sends the data to the radio unit 1129.

On the other hand, in the terminal station, radio section 1129
When the data is received by the CNT channel from, the CNT is decomposed by the CNT decomposing unit 1115, and processing is performed using the received values of each unit. Only when the received system ID matches the value written in the ID register 1110 of the own station, control is performed so as to receive the subsequent data. If the received WA matches the value of its own WA register 1111 during intermittent reception, a start request interrupt is generated. Further, the table of the hopping pattern register 1108 is rewritten using the received BF and NF information data.

Since the frequency number assigned to the NF field is that of the hopping pattern of the CNT channel, the hopping pattern used for the voice channel and the data channel is determined based on the frequency number assigned to the NF field. The pattern register is generated by time-shifting the pattern register.

In the LCCH channel, the transmitter terminal 11
0 is the LCC inside the channel codec 1101
The data stored in the H register 1112 is
Assembled by the disassembly unit 1116 and transmitted to the wireless unit at a predetermined timing. The received LCCH data is LCC
After being disassembled by the H assembling / disassembling unit 1116 and temporarily stored in the LCCH register 1112 inside the channel codec,
An interrupt is generated for the CPU, and the CPU reads it.

In the audio channel, the audio input / output unit 1102
Is digitally encoded by the ADPCM codec 1103, and is taken into the channel codec 1101 via the ADPCM interface 1106. In the channel codec 1101, the data input in the audio assembling / disassembling section 1118 is assembled and transmitted to the radio section 1129 at a predetermined timing.

On the contrary, the audio data received from the radio unit is
It is disassembled in the voice assembling / disassembling unit 1118,
Output at the timing of the ADPCM codec 1103 via the M interface 1106,
Output to 102.

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 CPU of the channel codec
The bus interface 1105 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 unit 1117 converts the data into serial data and transmits the data to the wireless unit at a predetermined timing.

Conversely, when data is received, the data assembling / disassembling unit 1117 converts the data into parallel, outputs a DMA request for each byte, and outputs a DMA request.
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, a CRC code generator 1121 generates a CRC code as necessary, stores the CRC code in a CRC field, and transmits the CRC code. 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 1125. This is to reduce the unbalance of the data sent to the radio unit and to facilitate the synchronization clock extraction.

Conversely, when a unique word is detected at the time of data reception, the descrambler 1125 detects the unique word 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, wireless transmission of voice and data according to a predetermined frame is performed.

Hereinafter, the operation of the present system will be described in several cases.

1. Processing at power-on (1) Sequence of control station and terminal station at power-on FIG. 8 is a sequence showing operations of the central control station and terminal station at power-on in the present system.

In step S1601, when the power is turned on and the terminal is initialized, the terminal determines whether the terminal itself is a central control station or a terminal station. , Determine hopping pattern, sync signal,
It assembles the ID hopping pattern information, its own area number, and the like into a frame, and outputs the frame as a CNT frame at predetermined timing.

Similarly, after the terminal is started, if it is recognized that the terminal itself is a terminal station, the address of the terminal itself and the area number of the control station to be received are stored. When this process is completed, a CNT frame from the control station is waited at an arbitrary frequency. When receiving the CNT frame from the central control station,
Based on the area number, the frequency to hop in the next unit time is obtained based on the NFR in this frame. The terminal station changes the reception frequency based on the received frequency, and
Wait for T frame. The terminal station repeats this process,
The hopping pattern used by the central control station is recognized and stored.

When the storing of the hopping pattern is completed in the terminal station, the terminal station notifies the terminal station that it is newly added as a terminal station by using an LCCH frame in S1602. At this time, the global address to be received by all the terminals is entered in the DA of the LCCH frame, and data indicating that new registration is to be performed is transmitted in the data portion and transmitted.

The central control station receives the LCCH frame and, if the DA in the LCCH frame has a global address, receives the data of the data section. If the address of the terminal station and the registration request signal are present, this information is transmitted. Based on this information, the terminal station address and the type information of the terminal station are stored and newly registered.

When the registration is completed, in S1603, the central control station notifies the newly registered terminal station of the address of the central control station using an LCCH frame. When the terminal station receives the address of the control station in the LCCH frame, the terminal station stores the address of the control station.
At 1604, a start-up completion notification is made to the central control station using the LCCH frame. When the central control station receives the start-up completion notification from the terminal station, the central control station enters an operation state, performs a timing process, and outputs the type of the own terminal at predetermined time intervals using the LCCH. The central control station and other terminal stations store the terminal type and address information from the received terminal type information, and confirm that the terminal station is within the communicable range.

After outputting the start-up completion notification, the terminal station can make a call from the terminal station in S1605.

(2) Operation at Power-on in Central Control Station Next, FIG. 9 is a flowchart showing the operation at power-on in the central control station.

When the power of the terminal is turned on in S1701,
In step S1702, the terminal is initialized and enters an operation state. As a result of this processing, if it is recognized in S1703 that the terminal is a central control station, processing for storing the ID information, address information, and area information of the own terminal is performed in S1704. Means for inputting the area information and the terminal address information include a case where a value set by a DIP switch or the like at the time of startup is stored, a case where a value input by a dial key of a telephone or the like is stored, or a computer. For example, it is conceivable to receive a value input from a keyboard such as a keyboard via a bus and store it.

Then, upon receiving this address information,
It is determined whether the value input in S1705 is valid,
If the address information is not valid, a process of storing the address information again is performed in S1704.

Upon confirming that the stored address is valid in step S1705, a process for determining a hopping pattern to be used is performed in step S1706. At this time, the central control station carries out carrier sensing on all available frequencies, and selects a predetermined number of frequencies having the best radio wave condition from among them as a hopping pattern.

If the usable frequency is equal to or less than the predetermined number as a result of acquiring the hopping pattern in S1707, it is detected in S1711 whether the carrier sense has been performed for a predetermined time. And if you have not done it for a predetermined time,
In S1706, the process for determining the hopping pattern is continued. Upon detecting that a predetermined time has elapsed in S1711, the central control station notifies the central control station that the hopping pattern could not be determined by screen display or sound in S1712.

After this processing, if there is a request to determine the hopping pattern again in S1713, the processing for determining the hopping pattern is performed in S1706. S17
If there is no request for retry in S13, it is notified in S1712 that the hopping pattern cannot be determined.

If a predetermined hopping pattern has been obtained in S1707, processing for assembling a CNT frame is performed in S1708. The CNT frame is the synchronization signal I
This is a frame including D, area number, and frequency information.

When the assembly of the CNT frame is completed,
A process of transmitting a CNT frame using one frequency of the hopping pattern determined in S1709 is performed, and based on the hopping pattern determined in S1710,
The process shifts to a normal process of transmitting the CNT frame while changing the frequency.

(3) Operation at the time of new terminal registration in the central control station FIG. 10 is a flowchart showing the operation at the time of new terminal station registration in the central control station.

During normal processing in S1801, S1802
When the centralized control station receives the LCCH frame and the DA includes the address addressed to the own terminal or all terminals, the central control station extracts the control data in the received LCCH frame and executes the instruction.

If it is confirmed in S1803 that the control data received is a registration request from the terminal station, a confirmation process of the terminal station address transmitted together with the registration request is performed in S1804. If the control data received in S1803 is not a registration request, the control indicated by the control data is performed.

As a result of the terminal station address confirmation in S1804,
Upon detecting that the terminal station address is normal in S1805, the central control station performs processing for registering the terminal station address in S1806, and stores the address information.

If it is detected in S1805 that the terminal station address is not normal, processing for discarding the registration request received in the LCCH frame is performed in S1810, and normal processing is performed again in S1801.

When registration of the terminal station is completed in S1806,
In step S1807, the address of the central control station is entered in the DATA unit using the LCCH frame, and the address of the terminal station is entered in DA and transmitted to the terminal station whose registration is completed.

After transmitting the central control station address in S1807, if it is not possible to confirm the start-up completion notification signal using the LCCH frame from the terminal station whose registration has been completed in S1808, it is detected in S1811 whether a predetermined time has elapsed.
If the predetermined time has not elapsed, in step S1808, the terminal waits for a start-up completion notification using the LCCH frame from the terminal station.

If a predetermined time has elapsed after the central control station address was notified to the terminal station in S1811, if S1807
Performs a process for notifying the terminal station of the central control station address using the LCCH frame again. S1808
In step S1809, when the startup completion notification signal from the terminal station is detected, the terminal station completes the new registration of the terminal station and shifts to the normal processing.

(4) Operation at Power-on in Terminal Station FIG. 11 is a flowchart showing an operation at power-on in the terminal station.

When the terminal is turned on in S1901,
In step S1902, the terminal is initialized and enters an operation state. As a result of this processing, if it is recognized in S1903 that the terminal is a terminal station, in S1904, the terminal recognizes the terminal type of the telephone terminal, the data terminal, and the network control terminal.

When this recognition processing is completed, S1905
Then, a process for storing the ID information, the address information, and the area information of the own terminal 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 address information is read, S1
In step 906, it is determined whether the input value is valid. If the value is not valid, in step S1905, processing for storing the address information again is performed.

If it is confirmed in S1906 that the stored address is valid, a process for acquiring a hopping pattern to be used is performed in S1907.

At S1907, CNT from central control station
In order to receive a frame, it shifts to a reception standby state at an arbitrary frequency. If a CNT frame from the central control station can be received at that frequency, the area number is recognized from the Rev part in the CNT frame and compared with the area number stored in the terminal itself.

If the area numbers match, CN
The terminal station acquires the frequency to be hopped in the next unit time from the NF part in the T frame, moves the reception frequency to the frequency, and waits for the next CNT frame. The terminal station repeats this operation, recognizes the central control station to which the terminal station belongs, and recognizes and stores the frequency hopping pattern.

As a result of the hopping pattern acquisition processing in S1907, if the hopping pattern could not be acquired in S1908, a notification that the hopping pattern could not be acquired is used in S1914 by using a warning sound or a screen display. And performs processing for acquiring a hopping pattern in S1907.

If it is detected in S1908 that a hopping pattern has been obtained, in S1909, processing for notifying the address of the terminal station to the central control station using an LCCH frame is performed. Here, using the LCCH frame, the global address received by all terminals is written in DA in this frame, and a registration request and its own terminal address are placed in the DATA section and transmitted to the central control station.

After transmitting this signal, the terminal station proceeds to S1910
, Receiving the LCCH frame while changing the frequency according to the obtained hopping pattern. And S19
In S1115, if the same address as that of the own terminal cannot be confirmed in the DA in the received LCCH frame in S1115
Then, it monitors whether or not a predetermined time has elapsed after transmitting the own terminal address.

If the predetermined time has not elapsed,
The processing for receiving the central control station address in the LCCH frame from the central control station is continued. Also, S1915
When it is detected that a predetermined time has elapsed, the processing proceeds to step S1909.
Then, a process for notifying the control terminal of the own terminal address again using the LCCH frame is performed.

At S1911, the LCCH from the central control station is
When the own terminal address is detected in the DA in the frame and the data indicating registration is confirmed in the DATA section,
At 1912, the DCH of the LCCH frame is
A is placed on A, the address of the central control station, and a signal indicating the completion of startup is placed on the DATA section, and the LCCH frame is transmitted. When the output of this signal ends, the flow shifts to intermittent reception processing in S1913.

2. Processing at the time of operation of the terminal station (1) Processing at the time of standby at the terminal station FIG. 12 is a flowchart showing the operation at the time of standby at the terminal station.

When the terminal station is performing intermittent reception in S2001, at the same time in S2002, a predetermined time is measured by a timer in accordance with the type information of the terminal recognized at startup.

At this time, if the terminal station is a telephone terminal, outgoing and incoming calls are performed frequently, so that the interval of the type information transmission process is shorter than that of the data terminal. Further, a terminal having an AC power supply such as a network control device sets a transmission interval shorter than that of the telephone terminal. Also, in the data terminal, the transmission interval of the type information can be set according to the frequency of use and whether or not the user moves.

Then, in steps S2001 and S20 described above,
If there is an outgoing / incoming / incoming / outgoing request to this terminal station during the process of 02, the process proceeds to outgoing / incoming / outgoing processing. When there is no outgoing / incoming / outgoing request, it is monitored in S2004 whether a predetermined time has elapsed. Then, when it is detected that the predetermined time has elapsed, S
In 2005, the type information including the terminal number of the own terminal is transmitted to all other terminals.

Next, if the transmission of the type information does not end in S2006, it is detected in S2008 whether or not the terminal station has an outgoing / incoming request. When there is an outgoing / incoming / incoming / outgoing request, the process shifts to the outgoing / incoming / outgoing process with priority. If there is no outgoing / incoming / outgoing request, the process returns to S2005, and the process of transmitting the own terminal type information is continued.

If it is detected in step S2006 that the process of transmitting the type information of the own terminal has been completed, the process proceeds to step S2007.
To clear the timer, and perform the time counting process for the predetermined time again.

If it is detected in S2004 that the predetermined time has not elapsed, it is monitored in S2009 whether there is transmission of type information from another terminal. When the type information is transmitted from another terminal, the terminal is registered in step S2010 based on the received terminal type information. At this time, the transmitted time information is simultaneously stored. The time information includes the transmission time, transmission interval information of the transmitting terminal, and the like.

In S2009, if there is no transmission of type information from another terminal station, in S2011, detection of a terminal in which transmission of type information from another terminal to its own terminal is not longer than a predetermined time is performed based on the time information. Do. If there is a terminal that has not transmitted the type information from the other terminal to the own terminal for a predetermined time or more, in step S2012, the terminal station deletes the registration of the terminal, deletes the registration of this terminal, and transmits to this terminal. Recognize that it is impossible.

If the state in which no type information is transmitted from another terminal is within a predetermined time in S2011,
01 performs intermittent reception.

(2) Processing at the time of transmission at the terminal station FIG. 13 is a flowchart showing the operation at the time of transmission at the terminal station.

During normal processing such as intermittent reception in S2101,
If there is a call request from the terminal in S2102, S210
In step 3, a process is performed to check whether the input destination terminal exists in the terminal type information stored from the input terminal number. In S2104, when it is confirmed that the type information of the destination terminal is registered, the process shifts to a calling process.

If it is detected in S2104 that the type information of the destination terminal has not been registered, the transmission process is stopped in S2105, and in S2106, a call-disabled message is displayed on the display unit and no call-out process is performed.

[0121]

As described above, according to the present invention,
In a system having a centralized control station and a terminal station, by confirming terminals that can communicate with the terminal station at predetermined time intervals, when communication between terminals is performed, unnecessary communication when communication with the partner terminal station is impossible is performed. There is an effect that transmission processing can be eliminated, useless radio wave output can be reduced, operability can be improved, and an efficient system can be provided.

[Brief description of the 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 an explanatory diagram showing a configuration inside a frame used in the embodiment.

FIG. 6 is an explanatory diagram showing a configuration inside each channel used in the embodiment.

FIG. 7 is a block diagram showing a channel codec board of the embodiment.

FIG. 8 is an explanatory diagram showing a power-on sequence between the central control station and the terminal station in the embodiment.

FIG. 9 is a flowchart showing an operation at the time of power-on in the central control station of the embodiment.

FIG. 10 is a flowchart showing the operation of the central control station of the above embodiment at the time of new registration of a terminal station.

FIG. 11 is a flowchart showing an operation at the time of power-on in the terminal station of the embodiment.

FIG. 12 is a flowchart showing an operation at the time of standby in the terminal station of the embodiment.

FIG. 13 is a flowchart showing an operation at the time of calling in the terminal station of the embodiment.

FIG. 14 is an explanatory diagram showing a configuration example of a conventional system.

FIG. 15 is an explanatory diagram showing a sequence when calling is not possible in the conventional system.

[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 (9)

[Claims] A central control station for controlling the entire system;
In a wireless communication system including the central control station and a plurality of terminal stations wirelessly connected, the terminal station includes: a transmitting unit configured to transmit control data to a central control station and another terminal station; Receiving means for receiving control data from the terminal station, and managing means for managing other terminal stations to which radio waves reach from the own terminal station based on the control data received by the receiving means. Wireless communication system. 2. The terminal information transmitting unit according to claim 1, wherein the terminal station includes terminal information of its own terminal station in control data and transmits the control data to a central control station and another terminal station by the transmitting unit. Terminal information detecting means for detecting terminal information from the central control station and other terminal stations included in the control data received by the receiving means, and terminal information storing means for storing the detected terminal information. Wireless communication system. 3. The terminal device according to claim 2, wherein the terminal station shifts to an operation state.
When the time measuring means detects the lapse of the predetermined time, the terminal means transmits the terminal information of the own terminal station to another terminal station by using the transmitting means. A wireless communication system, comprising: 4. The wireless communication system according to claim 3, wherein the terminal station changes the value of the predetermined time based on the terminal information. 5. The communication system according to claim 2, wherein when communication is performed from said terminal station to a central control station and another terminal station, terminal information of a partner terminal station matches terminal information stored in said storage means. A wireless communication system that executes a process for communicating with the terminal station only when the terminal station is in operation. 6. The terminal device according to claim 2, wherein the terminal station stores terminal information of another terminal station and, if the terminal information is not transmitted within a predetermined time from the stored terminal station, the other terminal station transmits the other terminal information. A wireless communication system, wherein registration of a terminal station is deleted. 7. The wireless communication system according to claim 2, wherein said terminal station transmits terminal information of its own terminal station to another terminal station using said transmitting means when said terminal station starts up. Communications system. 8. The wireless communication system according to claim 2, wherein the terminal station changes a transmission interval of terminal information of the terminal station according to a frequency of use of the terminal. 9. The method according to claim 1, wherein the central control station and each terminal station perform wireless communication by a frequency hopping method, and the control data is transmitted and received using a basic hopping pattern. A wireless communication system, characterized by: