JPH09200184A - Radio communication equipment and radio communication method using frequency hopping system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow one radio terminal equipment to make communication with plural hopping patterns by selecting a frequency for each of plural information sets according to plural hopping patterns different from communicated information and making communication at the selected frequency. SOLUTION: The system is made up of a public network 101, a network controller 102 with a public line interface, a radio telephone set 103, a personal computer 104 to which a radio PC card is connected, a printer 105 incorporating a radio control section, a radio LAN adaptor 106 having an Ethernet interface, and a LAN 107. An optional terminal among the terminals acts like a central control station. The other radio terminal makes a call request and a hopping pattern allocation request to the central control station in the case of starting communication. In this case, plural hopping patterns different from information for communication are stored for each communication, plural information is multiplexed and a frequency of plural hopping patterns different from communication information is selected for the radio communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device and a wireless communication method using a frequency hopping method.

[0002]

2. Description of the Related Art Conventional FHSS (Frequency H)
In the operating spread spectrum method, a usable frequency band is divided into a plurality of frequency bands (channels) having a constant bandwidth, and a signal carrier carries out communication while moving through the channels. The moving channel is given by the hopping pattern (HP),
In order to communicate with, it is necessary to have the same hopping pattern on the transmitting side and the receiving side and operate the system in synchronization. That is, the receiving side must follow the hopping pattern on the transmitting side to change the receiving frequency and demodulate. Therefore, in order to start communication between certain wireless terminals, it is necessary to have one and the same hopping pattern between those wireless terminals.

That is, the wireless terminal possesses only one hopping pattern set at the start of communication and can communicate only with a specific wireless terminal having the same hopping pattern. Therefore, in order to perform communication with a plurality of wireless terminals at the same time, communication is performed by time-division multiplexing the communication time using the hopping pattern used previously.

[0004]

However, in the above-mentioned conventional example, when communicating with a plurality of wireless terminals at the same time, one hopping pattern already time-divisionally multiplexes the communication time. When being time-division multiplexed and being used by being shared with the communication of another wireless terminal, one wireless terminal could not newly communicate with another wireless terminal at the same time.

In order to solve the above problems, the present invention provides
It is an object of the present invention to enable one wireless terminal to communicate with a plurality of hopping patterns at the same time.

[0006]

In order to solve the above-mentioned problems, the present invention stores a plurality of hopping patterns, which are different for each piece of information to be communicated, in a radio communication apparatus which communicates using a frequency hopping system. Storage means, multiplexing means for multiplexing a plurality of information, and frequency switching means for switching a frequency for each of the plurality of information according to a plurality of hopping patterns different for each of the information to be communicated,
There is provided a wireless communication device comprising communication means for performing communication at the frequency switched by the frequency switching means.

Further, in a wireless communication method of a wireless communication device for performing communication using a frequency hopping system, a plurality of hopping patterns different for each information to be communicated are stored for each communication, a plurality of information are multiplexed, and the communication is performed. There is provided a wireless communication method characterized by performing a wireless communication by switching a frequency for each of the plurality of pieces of information according to a plurality of hopping patterns different for each piece of information.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

(Description of Configuration of Each Part) FIG. 1 shows a configuration diagram of a system assumed in the present embodiment.

As shown in the figure, this system comprises wireless terminals having various functions. In FIG.
101 is a public network, 102 is a network controller having a public line interface, 103 is a wireless telephone, 104 is a personal computer to which a wireless PC card is connected, 105 is a printer with a built-in wireless controller, and 106 is an Ethernet interface. Wireless LAN adapter, 107 is a LAN
It is.

Any one of these terminals functions as a centralized control station. The terminal that has become the centralized control station generates the reference timing of the transmission frame, performs call control, and manages / assigns hopping patterns. Other wireless terminals (terminal stations) operate based on the timing generated by the centralized control station, and at the start of communication, make a transmission request and a hopping pattern allocation request to the centralized control station.

FIG. 2 shows the configuration of the radio control unit. In the figure, 201 is a PCMCIA interface,
A data input / output interface such as Centronics or Ethernet, 202 is a voice input / output interface such as a handset interface or a public network interface, 203 is an error correction processing unit (ECC), 204
Is a CPU, 205 is a memory, 206 is a DMA controller, 207 is an ADPCM codec, 208 is a channel codec, 209 is a wireless unit, and 210 is a data bus.

By changing the interface,
It is possible to use the same radio control unit for various types of terminals.

FIG. 3 shows an internal configuration diagram of the channel codec 208. In the figure, 301 is a CPU data bus, 302 is ADPCM-encoded audio data, and 30 is
3 is a CPU bus interface, 304 is an ADPCM
An interface, 305 is a mode register for setting an operation mode, 306 is a hopping pattern register capable of storing a plurality of hopping patterns, 307 is a frame number / next frequency number (BF / NF) register, 308 is a system ID register, and 309 is intermittent. An activation terminal address register, 310 is an LCCH (logical control channel) register for storing control data exchanged between wireless terminals,
311 is a FIFO buffer, 312 is a timing generation unit that controls the timing of transmitting and receiving wireless line frames,
313 is a CNT channel assembling / disassembling unit for exchanging system control information, 314 is an LCCH (logical control channel) assembling / disassembling unit, 315 is a data assembling / disassembling unit, 3
16 is a voice assembling / disassembling unit, 317 is a frame synchronizing unit, 3
18 is a unique word detector, 319 is CRC encoding /
Decoding unit, 320 is a bit synchronization unit, 321 is a wireless control unit, 322 is an intermittent reception control unit, and 323 is a scrambler /
A descrambler, 324 is an AD converter, 325 is a reception level detecting unit, 326 is an interrupt signal, and 327 is a wireless unit.

FIG. 4 shows the structure of the radio section. In the figure, 401a and b are transmitting / receiving antennas, 402 is a switch for switching the antenna 401, and 403 is a band pass filter (hereinafter referred to as B) for removing signals in unnecessary bands.
PF), 404 is a transmission / reception changeover switch, 405 is a reception system amplifier, 406 is a transmission system amplifier (with power control), and 407 is 1st. Intermediate frequency (1st.
IF) down converter, 408 is an up converter, 409 is a transmission / reception changeover switch, 410 is a BPF for removing an unnecessary band signal from the signal converted by the down converter 407, and 411 is 2n.
d. It is a down converter for the intermediate frequency (2nd.IF), and a double-conversion reception mode is constituted by 407 and 411.

412 is 2nd. BPF for IF, 413
Is a 90 ° transporter, 414 is a quadrature detector 41
Signals received and demodulated by the signals 2 and 413 are performed. Reference numeral 415 is a waveform shaping comparator, 416 is a voltage-controlled oscillator (hereinafter referred to as VCO) in the receiving system, 417 is a low pass filter (hereinafter referred to as LPF), 418 is a PLL including a programmable counter, a prescaler, a phase comparator, and the like. (Phase-Locked Loo
In p), 416, 417, and 418 form a frequency synthesizer of the receiving system.

Reference numeral 419 denotes a VCO for generating a carrier signal, 4
20 is an LPF, 421 is a PLL composed of a programmable counter, a prescaler, a phase comparator, etc. 41
A frequency synthesizer for hopping is constituted by 9, 420 and 421. 422 is a VCO of a transmission system having a modulation function, 423 is an LPF, 424 is a P including a programmable counter, a prescaler, a phase comparator, and the like.
The LLs 422, 423, and 424 configure a frequency synthesizer of a transmission system having a frequency modulation function. Four
Reference numeral 25 is a reference clock for various PLLs 418, 421, and 424, and 426 is a band limiting filter for transmission data (baseband signal).

FIG. 5 shows a radio frame structure used in this radio switching system. In the figure, 501 is a system control channel CNT, 502 is a line control channel LCCH, 503 is a voice channel for voice communication, 504 is a data channel for data communication, and CF of 505 is a frequency change. It is a guard time for. Moreover, in this system, the data transmission rate is 625 Kbp.
Since the length of one frame is set to 10 mS by using the low frequency frequency hopping wireless unit of s, 6250 bits of information can be sent per frame.

FIG. 6 shows the details of each channel configuration. C
S, CS0, CS1 and CS2 are carrier sense periods, P
R is a preamble period, SYN is a frame synchronization signal, I
D is an identification code, BF is a basic frame number, WA is a terminal identification number for notifying the sleep mode release, NF is the next hopping frequency, Rev is a reserve, CRC is a redundant bit for error detection, GT is a guard time, UW. Is a unique word, DA is the terminal identification number of the communication partner, and the numerical values below each channel configuration represent the respective bit numbers.

7 and 8 show other examples of frames. Figure 7
Are all frames dedicated to the voice channel. Further, FIG. 8 shows a frame dedicated to the data channel, and data of maximum 5588 bits can be sent per frame.
In addition to these, it is possible to use a frame in which the number of voice channels and the data communication amount of the data channel are changed by appropriately assigning 6250 bits of one frame to each channel in the same manner.

In this embodiment, the CNT channel and LC
The CH channel uses the first hopping pattern as the control channel, the two voice data channels use the second hopping pattern, and the data channel uses the third hopping pattern.

FIG. 9 shows a conceptual diagram of frequency hopping used in this system.

In the system of this embodiment, 26 MHz
26 frequency channels of 1 MHz width are used. Considering the case where there are frequencies that cannot be used due to interference noise or the like, 20 frequency channels are selected from the 26 channels, and frequency hopping is performed on the selected frequency channels in a predetermined order.

In this system, one frame is 10 ms
The frequency channel is hopped for each frame. Therefore, one of the hopping patterns
The length of the cycle is 200 ms.

In the figure, different hopping patterns are shown as different patterns. In this way, by using a pattern in which the same frequency is not used at the same time in each frame, it is possible to prevent a data error from occurring.

In this system, as shown in FIG. 10, a first hopping pattern (HP1) is used for the CNT channel and the LCCH channel, a second hopping pattern (HP2) is used for the voice channel, and a third hopping pattern is used for the data channel. The pattern (HP3) is used so that each channel does not use the same frequency at the same time. This makes it possible to send and receive data to and from different communication partners for each channel.

In order to reduce the number of hopping patterns held in the channel codec, hopping patterns used in each channel are generated by time-shifting patterns in which frequencies are arranged in the same order.

FIG. 11 shows the concept of four channels and frequency hopping used in this system. It shows how the control channel, voice channel, and data channel hop independently.

The basic operation of the radio control unit will be described below with reference to FIGS.

(Transmission data type) The data to be transmitted is roughly classified into three types.

The first is control data for performing call control such as a call origination request. This is generated according to the program stored in the ROM, and is written in the LCCH register 310 in the channel codec 208 via the CPU data bus.

The second is real-time data such as voice. This data is the voice input / output interface 202
Analog voice input from ADPCM codec 2
It is converted into a digital code by 07 and is taken into the channel codec 208 at a predetermined timing.

The third type is non-real time data sent from the memory 205 of the personal computer body. This data is input from the data input / output interface 201,
It is stored in the memory 205 by DMA transfer. When a predetermined amount of data is stored in the memory 205, it is encoded by the error correction processing unit (ECC) 203 and then DMA-transferred to the channel codec 208.

When receiving these data, the flow is completely opposite.

(Explanation of operation of channel codec) The channel codec 208 has a function of assembling data into the frame format shown in FIG. 5 and disassembling the frame and sending the data to the input / output interface 201. The operation of the channel codec 208 will be described below.

First, the reference of the operation timing of the channel codec 208 is generated by the timing generation unit on the centralized control station side described in the system of FIG. The central control station side transmits a frame in accordance with this timing, and the terminal station which has received the frame maintains the frame synchronization in accordance with the frame synchronization word.

Next, the data sent from the centralized control station side through the CNT channel is stored in the register inside the channel codec 208. An HP (hopping pattern) register 306 and an ID are provided inside the channel codec 208.
Register 308, WA (starting terminal address) register 3
09, the CPU writes necessary values in these registers on the central control station side. Further, in synchronization with the operation timing, the frame number / next frame frequency number (BF / N
F) The value in the register 307 is updated. The frequency number written in the NF register is the hopping pattern (first hopping pattern) of the CNT channel. The channel codec 208 reads out the data in these registers at the timing of transmitting the CN channel data, and the CNT assembling unit 312 assembles the data and transmits the data.

On the other hand, in the terminal station, when receiving the CNT channel, the CNT assembling / disassembling unit 312 disassembles the CNT channel.
Perform processing using the received values of each part. Only when the received system ID matches the value written in the ID register 306 of the own station, the subsequent data is controlled to be received. When the received WA coincides with the value of the WA register 307 of the own station during the intermittent reception, the activation request interrupt is generated. Furthermore, the table of the hopping pattern register 308 is rewritten using the received BF and NF information data.

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

In the LCCH channel, the CP of the transmitting terminal
The data stored by the U in the LCCH register 310 inside the channel codec 208 is assembled by the LCCH assembling / disassembling unit and transmitted at a predetermined timing. In order to prevent collision with other terminals, a plurality of carrier sense fields are provided. LCCH data received is LCCH
After being disassembled by the assembling / disassembling unit and once stored in the LCCH register 310, an interrupt is generated to the CPU, and the CP
Read by U.

In the voice channel, the data inputted through the ADPCM interface 304 is assembled by the voice assembling / disassembling unit and sent out at a predetermined timing. On the contrary, the received audio data is decomposed by the audio assembling / disassembling unit at a predetermined timing and is output at the timing of the ADPCM codec 207 via the ADPCM interface 304.

On the data channel, data is transmitted only when the CPU makes a data transmission request. When a data transmission request is made, the CPU bus interface 303 of the channel codec 208 is DMA (Direct Memory Ac) at the timing of each byte.
access request to the DMA controller (DMA
C) Output to 206. DMAC2 for DMA request
When the data is written according to 06, the data assembling / disassembling unit converts the data into serial data and transmits the data at a predetermined timing. On the contrary, when data is received, the data assembling / disassembling unit converts the data into parallel, outputs a DMA request for each byte to the DMAC 206, and the DMA controller transfers the received data to the memory 205. 1
When the transfer of the data for the frame is completed, an interrupt is generated to the CPU, and the CPU receiving the interrupt performs processing such as securing a memory for receiving the next frame.

When transmitting data on all of the above channels, the CRC code generator 318 generates a CRC code,
It is stored in the RC field and transmitted. CRC on the receiving side
It is possible to check and detect the occurrence of errors.
Further, all the transmission data other than the frame synchronization word and the unique word are scrambled by the scrambler 322. This is to reduce the imbalance of the data sent to the radio unit and to facilitate the extraction of the synchronous clock.

On the contrary, at the time of data reception, when the frame sync word or the unique word is detected, the descrambler 322 descrambles at that timing,
At the same time as performing the CRC check, data is input to the decomposing unit of each field.

(Explanation of Operation Example) As described above, in the present system, a frame composed of a plurality of channels for communication between terminals is assembled and the frequency used is controlled to be switched at regular intervals. There is.

The specific operation of this system will be described below when voice communication is performed via the network control device using a handset connected to a personal computer, and the personal computer transfers files to and from other personal computers. The case and the case of simultaneously performing voice communication and data communication will be described below. In the present embodiment, description will be given assuming that the network control device connected to the public line functions as a central control station.

FIG. 12 is an operation sequence of the control station and the terminal station when the power is turned on in this system, FIG. 13 is a call control sequence until the start of data communication or voice communication, and FIG. 14 is a flowchart of voice communication control operation in the personal computer. FIG. 15 is an operation flowchart when voice communication starts,
FIG. 16 is a flow chart of data communication control operation in a personal computer, FIG. 17 is a flow chart of data communication operation in a personal computer, FIG. 18 is a conceptual diagram of time division channel and frequency hopping during voice communication, and FIG. 19 is a time division channel during data communication. And a conceptual diagram of frequency hopping.

The description will proceed with reference to these figures.

<Sequence of control station and terminal station when power is turned on> In FIG. 12, when power is turned on and the terminal is initialized in step S1201, the terminal controls itself by the set value of the external switch. If it is a control station, it determines the first hopping pattern for the control channel and assembles the synchronization signal, hopping pattern information, own area number, etc. into a frame. , Is output as a CNT frame at every predetermined timing.

Similarly, when the terminal is recognized as a terminal station by the setting value of the external switch after the terminal is started up, the address of the terminal itself and the area number of the receiving control station are stored. When the process ends, the CN from the control station
Wait for T frames at any frequency. CNT from control station
When the frame is received, the frequency that hops to the next unit time is acquired based on the NF in the 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 processing, recognizes the hopping pattern used by the control station, and stores this in the HP register 306 in the channel codec 208.

When the storage of the hopping pattern is completed in the terminal station, the terminal station notifies the terminal station that it will newly join as a terminal station by using the LCCH frame in step S1202. At this time, the global address received by all terminals is added to the DA of the LCCH frame, and the data indicating that new registration is to be performed is transmitted. The control station receives the LCCH frame and DA in it
If there is a global address, the data in the data section is received, and if there is a terminal station address and a registration request signal, the terminal station address is stored and newly registered based on this information.

Upon completion of the registration, in S1203, the control station sets the address of the control station to L for the newly registered terminal station.
Notify using CCH frame. LCCH at the terminal station
When the address of the control station is received by the frame, the address of the control station is stored, and after the processing is completed, the start-up completion notification is sent to the control station using the LCCH frame in S1204. When the control station receives the start-up completion notification from the terminal station, it shifts to normal processing.

The terminal station outputs S after the startup completion notification is output.
In 1205, transmission from the terminal station becomes possible.

First, in FIG. 14, the terminal station determines whether or not there is a voice communication request. When there is a voice communication request (S1402), the voice communication application program of the personal computer is activated. Then, the wireless unit driver installed in the personal computer operates and sends a voice transmission request and a destination number (extension number of the partner terminal) to the wireless control unit via the data input / output interface section (S1403).

Next, the radio control unit enters into a transmission procedure. The transmission request command is written as LCCH data in the LCCH register 309 in the channel codec 208 (S1404), the central control station address is written in the destination address register (S1405), and the mode register 305 of the channel codec 208 is set to the LCCH transmission mode. It is set (S1406). At the time of LCCH transmission, carrier detection is performed in the carrier sense field in the channel codec 208 (S1407). If a carrier is detected during this time, it is considered that another terminal is using the LCCH channel, so contention control is performed to suspend data transmission until the next frame (S1).
408). If the carrier is not detected, it is considered that the other terminals do not use the LCCH channel, so that transmission of data to the central control station is started (S1409). The hopping pattern used for transmitting LCCH data uses the first hopping pattern as in the CNT channel.

Upon receiving the call request command, the centralized control station performs call processing such as dialing on the public line. If there is a response from the partner terminal via the public line, an incoming call notification command is sent to the personal computer that made the outgoing call request using the LCCH. In addition, notification of the hopping pattern (second hopping pattern) number when exchanging audio data between the PC and the central control station in the future and notification of which of the two audio channels will be used as the sender side will be sent. Perform (S1410).

On the side of the personal computer that has received the incoming call notification, the hopping pattern, and the channel to be used, the second hopping pattern used in the voice communication channel and the channel to be used are set in the HP register 306 of the channel codec 208, and ADPCM is set. The operation of the codec is started (S1411).

At the start of a call, the mode register 305 of the channel codec 208 is set to the voice mode (S1501 in FIG. 15), the transmission slot number is set (S1502), and the operation start of the ADPCM codec is set (S1503). I do.

Then, a voice call is started (S1504), and it is determined in S1601 of FIG. 16 whether there is a data communication request.

By the above procedure, the link between the personal computer, the network control device and the partner terminal is established, and the call between the personal computer and the partner terminal is started.

During voice communication, the voice input from the handset of the personal computer is encoded by the ADPCM codec 207, the encoded data is input to the channel codec 208, and a preamble and unique word are added every 160 bits. Then, the data is scrambled and transmitted at the position of a predetermined voice channel.

On the other hand, when receiving, bit synchronization is established in the preamble section of the data received in the voice channel, and descrambling is performed when a unique word is detected. The descrambled data is decoded by the ADPCM codec 207 and output as voice from the speaker of the handset.

At this time, the frequency of the control channel is switched according to the first hopping pattern as F1, F2, F3, F4, ... As shown in FIG.
Since the frequency is switched to 4, F5, F6, ..., The frequency switching during voice communication is performed as shown in FIG.
It becomes as shown in.

That is, the frequency switching during voice communication is F
1, F3, F2, F4, F3, F5, ...

Next, when the voice communication request is not made in S1402 and the data communication request is made to the terminal station in S1601 of FIG. 16 (S1601), the data communication application program of the personal computer is activated and installed in the personal computer. The wireless unit driver operates and requests data transmission to the wireless control unit and the destination number (extension number of the partner terminal) via the data input / output interface section.
Is sent (S1602).

Next, the wireless control unit enters the calling procedure as in the case of voice communication (S1603 to S1608),
Start sending LCCH data to the centralized control station.

The central control station receiving the call request command,
Similarly, the LCCH is used to notify the other terminal of the incoming call, and when a response is returned from the other terminal, the hopping pattern (third hopping pattern) numbers for data transmission / reception are transmitted to the two terminals to complete the call setup ( S1
608).

By the above procedure, when the two terminals obtain the third hopping pattern for data transmission / reception (S160
9), set the third hopping pattern to be used in the HP register in the channel codec 208 (S161).
1) In the data channel, data is transmitted and received while switching the frequency according to the given hopping pattern (S1612). That is, as shown in FIG. 17, the wireless control unit driver is the memory 205 of the personal computer main body.
The data to be transmitted is transferred to the memory 205 in the wireless control unit (S1701).

In the radio control unit, the data stored in the memory 205 is error-correction-coded and the memory 205 is re-encoded.
(S1702). After that, the channel codec 20 is transferred from the memory 205 to the DMA controller.
The DMA transfer address to 8 is set (S17
03), the mode register 3 of the channel codec 208
The transmission request is set to 05 (S1704). Upon receiving the transmission request, the channel codec 208 detects the carrier (S1705), and when the carrier is detected, waits for one frame (S1706). If a carrier is not detected, a DMA request is generated in 1-byte units according to the timing of the data channel. Upon receiving the DMA request, the DMA controller transfers the data in the memory 205 to the channel codec 208 (S17
07), the channel codec 208 adds a preamble and a unique word, and then scrambles and transmits (S1708).

When the transmission of one packet is completed, the CPU
An interrupt is generated (S1709). If there is more data to be transmitted, the process returns to S1703 and is transmitted again (S1710).

If there is no data to be transmitted, it is checked if there is a voice communication request (S1711). At this time, if voice communication has already been performed, no new voice communication request is made, but only data communication is made, and if a voice communication request is made, the flow proceeds to S1402 in FIG. 14 described above.

If the voice communication is not requested in S1711, the mode register 305 of the channel codec 208 is set to the reception mode and the reception is waited (S1712).

In the receiving side radio control unit, D
The MA controller is set in the transfer mode from the channel codec 208 to the memory 205. When data is received (S1713), the channel codec 208 establishes bit synchronization in the preamble section of the received data, and descrambles when a unique word is detected. Then, a DMA request is generated in 1-byte units in the data section. The DMA controller that received the DMA request uses the channel codec 208
The data is transferred from the memory 205 to the memory 205 (S1714).
When the transfer of one packet of data is completed, a reception completion interrupt is generated from the channel codec 208, and the CPU
Performs error correction decoding processing of the data stored in the memory 205 to obtain the final received data, and transfers the data to the personal computer body (S1715).

Data can be transmitted by the above procedure. If there is more data to be transmitted, it is possible to transmit an unlimited amount of data by repeating the same procedure (S1716).

The frequency switching of the control channel during the data communication as described above is F1, F2, F3, F4, ... As shown in FIG. 10, and the frequency switching of the data channel is F5. , F6, F7, F8, ...
・ ・

That is, as shown in FIG. 19, the frequency switching for data communication only (not for voice communication) is F1, F.
5, F2, F6, F3, F7, ...

Next, when there is a request for data communication while voice communication is being performed in FIGS. 14 and 15, or when there is a request for data communication in FIGS. 16 and 17, that is,
An explanation will be given of a case where the personal computer transfers files to and from another personal computer while performing voice communication via the network control device using a handset connected to the personal computer.

The hopping patterns for voice communication and data communication are individually determined in the same manner as in the above description for voice communication and data communication. That is, both communications are performed with completely different hopping patterns. Then, the personal computer that simultaneously performs voice communication and data communication uses the HP register 306 in the channel codec 208 for the first hopping pattern for the control channel, the second hopping pattern for the voice channel, and the third hopping pattern for the data channel. Memorize each hopping pattern.

The radio section 209 has a channel codec 20.
The frequency is switched according to the three hopping patterns stored in the HP register 306 in the communication channel 8, and communication is performed.

That is, as shown in FIG. 10, hopping patterns (F1, F2, F3, F4, ...
,) And the hopping pattern (F3, F
4, F5, F6, ...) and hopping patterns (F5, F6, F7, F8, ...) of the data channel, and as shown in FIG. 11, F1, F3, F5, F
The frequency is switched to 2, F4, F6, F3, F5, F7, ....

In the above description, the case where the wireless terminal performs the outgoing call operation has been described, but the case where there is an incoming call will be described below.

FIG. 20 is an operation flowchart of the control station when there is an incoming call from the public network to the network control station. FIG. 21 is an operation flowchart of the wireless terminal when there is an incoming call from the public network to the control station.

In FIG. 20, when there is an incoming call from the public network to the network control station (S2001), the control station writes an incoming command in the LCCH register 309 in the channel codec 208, and sets the address of the destination wireless terminal in the destination address register. After writing, the mode register 305 of the channel codec 208 is set to the LCCH transmission mode, and the incoming wireless terminal is notified of the incoming call (S200).
2). The hopping pattern used for transmitting LCCH data uses the first hopping pattern as in the CNT channel.

The wireless terminal (which is a personal computer in the present embodiment) which has received the incoming command is (S210 in FIG. 21).
1) Incoming call processing such as sounding a ring tone to notify the operator that there is an incoming call is performed (S2102). After that, when the operator responds to the incoming call (S
2103), in order to notify the control station that a response to the incoming call has been made, an incoming call response command is written in the LCCH register 309 in the channel codec 208, the address of the centralized control station is written in the destination address register, and then the channel codec 208. Mode register 305
Is set to the LCCH transmission mode, and the central control station is notified that a response to the incoming call has been made (S2104).

When the centralized control station receives the incoming call response command (S2003), it notifies the responding personal computer of the hopping pattern at the time of exchanging the data transmitted to or received from the public circuit between the personal computer and the centralized control station. (S2004).

At this time, with respect to an incoming call from the public line, all the data is regarded as voice data, and the hopping pattern for notifying the personal computer is also the second hopping pattern for the voice channel. This is because all the data sent from the public line is modulated as voice data, so that even facsimile or personal computer data can be treated as voice data.

Upon completion of the notification of the hopping pattern to be used, the centralized control station shifts to the voice communication phase as in the case of making a call (S2005).

When the incoming call response command from the personal computer is not received in S2003, the personal computer judges that the communication is impossible and notifies the public line that it is busy (S2006).

The personal computer, which has notified the central control station of the incoming response in S2104, is assigned a hopping pattern to be used by the central control station thereafter (S2105), and uses it in the HP register 306 of the channel codec 208 in the voice communication channel. The hopping pattern number and the channel to be used are set, the operation of the ADPCM codec is started (S2106), and at the same time, the voice communication phase similar to that at the time of transmission is entered (S2107).

If the hopping pattern is not assigned in S2105, the incoming response command is transmitted again to the central control station.

If the personal computer issues a data communication transmission request during communication for an incoming call from the public line, the above-mentioned data communication transmission control phase is performed. Further, even if the personal computer is already performing data communication, if there is an incoming call, the above incoming call control phase can be performed.

[0091]

As described above, according to the present embodiment, the control channel, the voice channel, and the data channel communicate according to different hopping patterns, so that one wireless terminal has a plurality of hopping patterns. Communication can be performed simultaneously with the wireless terminal.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an embodiment.

FIG. 2 is a configuration diagram of a wireless control unit according to an embodiment.

FIG. 3 is a configuration diagram of a channel codec according to the embodiment.

FIG. 4 is a block diagram of a wireless unit according to the embodiment.

FIG. 5 is a configuration diagram of a radio frame according to the embodiment

FIG. 6 is a block diagram of each channel according to the embodiment.

[FIG. 7] Another example of a wireless frame

FIG. 8 is another example of a wireless frame

FIG. 9 is a conceptual diagram of a frequency hopping system according to an embodiment.

FIG. 10 is an example of a frequency hopping pattern according to the embodiment.

FIG. 11 is a conceptual diagram of time division channels and frequency hopping according to the embodiment.

FIG. 12 is a power-on sequence between the control station and the terminal station according to the embodiment.

FIG. 13 is a call control sequence until transmission starts according to the embodiment.

FIG. 14 is a flowchart of voice communication control operation according to the embodiment.

FIG. 15 is a flowchart of voice communication control according to the embodiment.

FIG. 16 is a flowchart of a data communication control operation according to the embodiment.

FIG. 17 is a flowchart of a data communication operation according to the embodiment.

FIG. 18 is a conceptual diagram of time division channels and frequency hopping during voice communication according to the embodiment.

FIG. 19 is a conceptual diagram of time division channels and frequency hopping during data communication according to the embodiment.

FIG. 20 is a flow chart of an incoming call control operation of the control station according to the embodiment.

FIG. 21 is a flowchart of an incoming call control operation of the wireless terminal according to the embodiment.

[Explanation of symbols]

 101 public network 102 network control device 103 wireless telephone 104 personal computer 105 printer 106 wireless LAN adapter 107 LAN

Claims (6)

[Claims] 1. A wireless communication device that performs communication using a frequency hopping method, a storage unit that stores a plurality of hopping patterns that differ for each piece of information to be communicated, and a multiplexer that multiplexes a plurality of pieces of information, A radio having a frequency switching means for switching a frequency for each of the plurality of pieces of information according to a plurality of hopping patterns different for each piece of information to be communicated, and a communication means for communicating at the frequency switched by the frequency switching means. Communication device. 2. The frequency information switching device according to claim 1, wherein the plurality of pieces of information are control information and at least one communication information, and the frequency switching unit switches the frequency of the control information and the at least one communication information by different hopping patterns. A wireless communication device characterized by performing. 3. The information according to claim 1, wherein the plurality of pieces of information are information for communicating with a plurality of partner wireless communication apparatuses, and the frequency switching unit has a different hopping pattern for each piece of information for communicating with the partner wireless communication apparatus. A wireless communication device characterized by switching between. 4. A wireless communication method of a wireless communication device for performing communication using a frequency hopping method, wherein a plurality of hopping patterns different for each piece of information to be communicated are stored for each communication, a plurality of pieces of information are multiplexed, and the communication is performed. A wireless communication method, wherein a frequency is switched for each of the plurality of pieces of information according to a plurality of hopping patterns that are different for each piece of information to perform wireless communication. 5. The control information according to claim 4, wherein the plurality of pieces of information are control information and at least one piece of communication information, and the wireless communication device switches frequencies of the control information and the communication information by different hopping patterns. Wireless communication method. 6. The information according to claim 4, wherein the plurality of pieces of information are pieces of information for communicating with a plurality of partner wireless communication apparatuses, and the wireless communication apparatus uses different hopping patterns for different frequencies for each piece of information with which the partner wireless communication apparatus communicates. A wireless communication method characterized by performing switching.