JP4464411B2 - Wireless communication device - Google Patents

Description

  The present invention relates to a wireless communication apparatus.

  In recent years, with the spread of ISDN, when data communication using a data terminal such as a personal computer is performed, the ISDN is connected to the ISDN via a terminal adapter.

  In this case, the data terminal (hereinafter referred to as PC) is connected to the terminal adapter with a cable such as RS232C, and the start-stop synchronization method is performed at a transmission speed of 2400 bps, 4800 bps, 9600 bps, 19.2 Kbps, 38.4 Kbps from the data terminal to the terminal adapter. Send data with. For terminal adapters that have received data, CCITT standard recommendation V. 110, I.I. The data is converted to a transmission rate of 64 Kbps according to 460 and transmitted to ISDN.

  Since ISDN, which is a public line, is connected to the terminal adapter, in general, telephones, facsimiles, and the like used for communication of other media (voice, image) are connected to the analog port of the terminal adapter.

  FIG. 17 is a diagram showing a system configuration when a conventional terminal adapter is used.

  In the figure, 2101 is a terminal adapter, 2102 is a PHS main unit connected to the first analog port of the terminal adapter, 2103 is a PHS telephone, 2104 is a PC connected to the terminal adapter via an RS232C cable, and 2105 is a PC and cable. 2106 is a printer connected to the PC with a cable, 2107 is a facsimile machine connected to the second analog port of the terminal adapter, and 2108 is an ISDN.

FIG. 18 is a diagram showing an internal configuration of a conventional terminal adapter.
In the figure, 2201 is a CPU (microcomputer), 2202 is a memory, 2203 is a data bus, 2204 is an ISDN interface unit including a DSU (Digital Service Unit), 2205 is a B channel serial signal, and 2206 is data transmitted by ISDN. An HDLC controller that assembles / disassembles a frame, 2207 is an RS232C interface, and 2208 is an analog port for connecting a terminal that can be connected to an analog public line.

  19 and 20 are diagrams showing a communication sequence at the time of data transmission / reception of a conventional terminal adapter.

  The procedure for data communication using a conventional terminal adapter is as follows.

  First, when data communication is performed using the data terminal 2104, a command for communication (communication command between the communication unit and the data terminal, such as an AT command) input from the data terminal 2104 is serial communication. Received by the interface 2207. The serial communication interface 2207 generates an interrupt request to the CPU 2201 and notifies the CPU 2201 that data has been received in the interrupt process executed by the interrupt request. The CPU 2201 receives the data from the data terminal 2104 via the serial communication interface 2207. The received data is transferred to the memory 2202. When the CPU 2201 analyzes the AT command from the data terminal 2207 and recognizes that the transmission is to the ISDN, the CPU 2201 activates the ISDN interface 2204 to perform a transmission process. When a response message is received from the ISDN, an AT command is transmitted to the data terminal 2104 via the serial communication interface 2207 to notify that the other party has responded.

  Thereafter, the data terminal 2104 starts data transmission via the terminal adapter. The data to be transmitted is stored in the memory 2202 in the same manner as in the previous AT command. Next, the CPU 2201 writes the data stored in the memory to the HDLC controller 2206, and the HDLC frame format data assembled by the HDLC controller 2206 is transmitted to the ISDN by the CPU 2201.

  Conversely, the data received from the ISDN is detected by the HDLC controller 2206 and stored in the memory 2202. The CPU 2201 writes the stored data to the serial communication controller 2207 and outputs it to the data terminal 2104 via the RS232C cable.

  On the other hand, a PHS base unit 2102, a facsimile machine 2107, and the like can be connected to the analog port of the terminal adapter 2101. When the PHS base unit 2102 that has received a call from the PHS telephone 2103 performs a call process (polarity reversal), the CPU 2201 detects this via the analog port 2208 in the terminal adapter 2101 and performs a call process to the ISDN. , PHS calls can be made. The same applies to the facsimile apparatus.

  However, since the terminal adapter described above can be connected to the PC only by a wired cable such as RS232C, it is necessary to install the PC and the terminal adapter close to each other. When the place to connect to the public line and the installation place of the PC are far away, long distance wiring is required, and wiring work is necessary.

Further, since the telephone line, the facsimile machine and the terminal adapter are shared by the public line, and the PC is connected to the terminal adapter, the printer, and the scanner, the connection is complicated and a wide installation place is required.
Further, when viewed from the conventional system as a whole, each resource (device) such as the PHS system connected to the terminal adapter 2101, the scanner 2105 connected to the data terminal 2104, the printer 2106, and the facsimile machine 2107 is effectively used. However, it is a wasteful arrangement of a plurality of similar functions as devices.

  Therefore, the present invention improves the operability and saves space by providing a wireless communication apparatus to which a communication line can be connected and having a recording means for recording and outputting data or a reading means for reading an image to perform integrated control. Is realized.

Therefore, the present invention
A wireless communication device capable of connecting a communication line,
Recording means for recording and outputting data;
Receiving means for wirelessly receiving data from the first information processing apparatus;
Connection means for connecting the second information processing apparatus by wire;
A first CPU that controls wireless communication with the first information processing apparatus; and a first register that is connected to the first CPU via a shared register, and controls the recording means and wired communication with the second information processing apparatus. A second CPU, and when transmitting data via the communication line, receives information designating a counterpart device via the communication line, and from the first information processing apparatus according to the information, the first CPU If the data received wirelessly via the data or the data received via wire from the second information processing device via the second CPU is sent to the counterpart device, and the data is recorded and output by the recording means, the wireless connection The first information processing device according to an instruction of a shared command used in common by the first information processing device and the second information processing device connected by wire From the first information processing apparatus, the recording means records and outputs data received wirelessly via the first CPU from a device or data received via wire from the second information processing apparatus via the second CPU. A wireless communication apparatus comprising: a control unit configured to communicate the shared command between the first CPU and the second CPU via the shared register when recording and outputting data received wirelessly ; provide.

  According to the present invention, a wireless communication apparatus capable of connecting a communication line is provided with a recording means for recording and outputting data or a reading means for reading an image, and is integratedly controlled so that information can be transmitted to an apparatus such as a terminal adapter. Compared with the case where the processing device, the recording device, and the reading device are connected, it is possible to improve operability and save space.

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

(First embodiment)
FIG. 1 is a diagram showing a system configuration according to the first embodiment of the present invention.
In the figure, 101 is a wireless communication device, 102 is a PHS phone, 103 is a PC connected by a wired cable, 104 is a PHS phone, 105 is a wireless data transmission protocol processing card (hereinafter referred to as PIAFS card), and 106 is connected wirelessly. PCs 107 are digital public communication networks (hereinafter ISDN).

FIG. 2 is a block diagram illustrating a configuration of the wireless communication apparatus 101.
In the figure, 201 is a central control unit (MPU), 202 is a data bus and address bus, 203 is a ROM, and 204 is a RAM.

  Reference numeral 205 denotes a facsimile (FAX) engine unit composed of a CPU (microcomputer) and an image processing unit, 206 denotes a CPU for the FAX engine, and 207 denotes a data bus of the FAX engine unit, which are necessary for performing a facsimile operation. Connected to the devices (208 to 216) to be controlled. 208 is a color printer, 209 is a color scanner, 210 is an operation panel, 211 is a parallel communication interface port, and 212 is a parallel communication interface connector. The printer 208 prints data transmitted from the PC via the parallel communication interface connector. The image read by the scanner 209 can be transmitted to the PC via the parallel communication interface connector 212. 213 is a fax modem, 214 is a handset, 215 is a speaker, 216 is a hold melody generator, which is controlled by the fax engine 205 and connected to an analog switch 217 at the same time. It is connected to a public communication line via a switch 217.

  A shared register 218 is used when data is exchanged between a device connected to the data bus of the FAX engine unit and a device connected to the data bus of the MPU 201.

  219 is a serial communication controller, 220 is an RS232C driver / receiver, 221 is an RS232C connector, which are connected to a communication port of the PC and function as an interface for data transmitted and received by the PC to and from the public communication line.

  A modular connector 222 connects ISDN (point U), and a DSU 223 converts data exchanged with the central office switch into a TTL level signal. 224 (a) is a modular connector for bus connection with a terminal connected to ISDN (S / T point), 224 (b) is a transformer, 224 (c) is a driver / receiver, and has a function of connecting to the S / T point. By converting the data of the AMI code exchanged with the ISDN terminal and the TTL level signal, a plurality of ISDN terminals can be connected by bus connection. An ISDN interface unit 225 controls the ISDN layers 1 to 3 and has an ISDN B channel data input / output function.

  An echo canceller 226 removes echoes generated in the public communication line. Reference numeral 227 denotes an HDLC controller that performs assembling / disassembling processing of HDLC format data on ISDN. A PIAFS controller 228 performs data assembly / disassembly processing of data in the wireless data transmission protocol (PIAFS) format.

  Reference numeral 229 denotes a first port switch, which includes a 5-2 changeover switch 231 and a 2-1 changeover switch 231, and performs switching processing of data transmitted through the ISDN B1 channel and B2 channel under the control of the MPU 201. Reference numeral 232 denotes an echo canceller control signal for setting an operation mode of the echo canceller and controlling on / off of the echo canceller operation.

  Reference numeral 233 denotes a second port switch, which includes 2-1 changeover switches 234 and 235, and performs a process of changing data connected to the first port switch 229 under the control of the MPU 201. 236 is I.I. A 460 data conversion processing unit performs a transmission rate conversion process of 32 Kbps / 64 Kbps.

  237 is a PHS engine unit, 238 is a PHS control CPU, 239 and 240 are voice codec units, radio transmission frame assembly / disassembly units, modulation / demodulation units, etc., 241 is a high frequency unit, 242 It is an antenna, and converts analog voice and facsimile data input / output via the analog switch 217 into PCM data, and enables two-channel 32 Kbps wireless voice / data transmission with a PHS telephone.

  The important signal functions are described below. Reference numeral 243 denotes a signal line for serial communication signals for inter-CPU communication between the CPU 206 of the MPU 101 and the FAX engine unit, and reference numeral 244 denotes a signal line for serial communication signals for inter-CPU communication between the MPU 201 and the CPU 206 of the PHS engine unit.

  245 and 246 are signal lines for analog signals that connect the analog switch 217 and the PHS engine unit 237, and the analog signals of these signal lines are respectively in the PCM codec of the PHS baseband processing unit 239 and the PHS baseband processing unit 240. Converted to PCM signal.

  247 is a signal line for 64 Kbps data obtained by PCM conversion of the analog signal from the analog signal line 245, 248 is a signal line for data of 64 Kbps communicating in the first wireless slot, and 249 is an analog signal from the analog signal line 246. Is a signal line for 64 Kbps data obtained by PCM conversion, and 250 is a signal line for 64 Kbps data communicating in the second wireless slot.

  Reference numeral 251 denotes a signal line for data of 32 Kbps used for unrestricted digital communication. It is connected to the port switch 229 via the 460 conversion unit 236.

  PCM audio data signal lines 252 connected to the baseband processing unit 1, PCM audio data signal lines 253 connected to the baseband processing unit 2, 460 is a signal line for unrestricted digital data connected to the processing unit 236, and is connected to the switch 231 and the PIAFS controller 228, respectively. Reference numeral 256 denotes a 64 Kbps data signal line connected to the PIAFS controller, and reference numeral 257 denotes a 64 Kbps data signal line connected to the HDLC controller. Reference numeral 258 denotes a signal line for 64 Kbps data transmitted through the ISDN B1 channel, and reference numeral 259 denotes a signal line for 64 Kbps data transmitted through the ISDN B2 channel.

  Reference numeral 260 denotes a signal line for supplying clocks of 8 KHz and 64 KHz extracted from ISDN, and transfer of signals on the data lines 258 and 259 is synchronized with these clocks. 261 is a signal line for supplying clocks of 8 KHz, 32 KHz, and 64 KHz output from the PHS engine unit, and signal transfer on the data lines 247, 248, 249, 250 is synchronized with these 8 KHz and 64 KHz. 251 is synchronized with 8 KHz and 32 KHz.

FIG. 3 is a block diagram showing a detailed configuration of the PHS engine unit 237.
In the figure, reference numerals 301 and 306 denote switches for switching signals connected to the analog switch 217, signals transmitted wirelessly, and signals connected to the ISDN. 302 and 307 are analog / PCM converters, 303 and 308 are ADPCM / PCM converters, 304 and 309 are TDMA assembling / disassembling units for assembling / disassembling the wireless transmission frame shown in FIG. 7, and 305 and 310 are π / 4. This is a shift QPSK modulation / demodulation unit. Reference numeral 311 denotes a multiplexer, which selects a baseband processing unit used when performing wireless data communication. As will be described in a second embodiment to be described later, when wireless data communication is performed with two channels, this multiplexer is unnecessary.

  In the baseband processing units 239 and 240, the switches 301 and 306 are switched under the control of the CPU 238, and the data transmission path is switched variously according to the situation. For example, when a call is made via an ISDN line using a handset, the analog signal 245 output from the analog switch 217 is converted into a PCM code by the analog / PCM conversion unit 302 and output to the data line 247. On the other hand, when a call is made between a handset and a wireless telephone, the voice data converted into the PCM code is converted into the ADPCM code by the ADPCM / PCM conversion unit, assembled into a radio frame, modulated, and then wirelessly transmitted. Sent to the line. Further, when voice data from a wireless telephone is transmitted to ISDN, a data line 247 is connected to the ADPCM / PCM conversion unit 303.

  A phase comparator 312 outputs a pulse having a width corresponding to the phase difference. 313 is a low-pass filter, 314 is a temperature compensated voltage controlled oscillator (TVCXO), 315 is a frequency dividing circuit, and generates a 19.2 MHz clock 316 with an accuracy of ± 5 ppm synchronized with a 64 KHz clock extracted from ISDN. . The baseband processing units 239 and 240 are operating based on the generated 19.2 MHz clock.

  When transmitting and receiving data (including PCM-encoded voice) between the PHS and ISDN, it is necessary that the ISDN line and the PHS wireless line operate in synchronization to prevent data overrun and underrun. . On the other hand, the synchronization timing accuracy of the PHS wireless line is required to be as high as ± 5 ppm. Since the accuracy of the synchronous timing clock extracted from ISDN is worse than ± 5 ppm, a 64 kHz clock 260 synchronized with ISDN is multiplied by a PLL composed of TVCXO 314 as shown in 312 to 315 19 There is a need to generate a 2 MHz clock and operate the baseband processing units 239 and 240.

  The TVCXO 314 has an output frequency of 19.2 MHz ± 5 ppm regardless of the input voltage, and a 64 KHz clock obtained by dividing the output clock and a 64 KHz clock synchronized with ISDN are input to the phase comparator 312. Depending on the phase comparison result, a 5V pulse is output if the phase of the ISDN clock is advanced, and a 0V pulse is output if the phase is delayed, and the signal smoothed by the low-pass filter 313 controls the TVCXO. As a result, when the phase of the ISDN clock advances, the control voltage of the TVCXO increases, the TVCXO output frequency increases, and the phase of the TVCXO output and the ISDN clock match. Conversely, when the phase of the ISDN clock is delayed, the control voltage of the TVCXO is lowered, the output frequency of the TVCXO is lowered, and the phase of the TVCXO output and the ISDN clock is in the direction of coincidence.

4 and 5 are diagrams showing the detailed configuration of the switch 230. FIG.
4 and 5, 401 and 402 are decoders, 403 and 405 are OR gates, and 404 and 406 are AND gates.

  FIG. 4 is a circuit for connecting the B1 channel and B2 channel data received from the ISDN to any one of the three signals connected to the PHS engine unit, the HDLC controller 227, and the PIAFS controller 228. When the MPU 201 writes a predetermined value to the address assigned to this switch, the decoder 402 decodes the value, and among the counterparts (252, 253, 254, 256, 257) to which the data lines 258, 259 are connected. L (0 V) is output only to the OR gate 403 connected to the partner to be connected, and H (5 V) is output to the other OR gate. Therefore, the data on the data lines 258 and 259 is input to the AND gate 404 only from the selected OR gate, and as a result, the data lines 258 and 259 are each connected to one of the five output data lines. is there.

  FIG. 5 is a circuit for connecting any one of the three signals connected to the PHS engine unit, the HDLC controller 227 and the PIAFS controller 228 to the BDN channel and B2 channel transmission data lines of ISDN. When the MPU 201 writes a predetermined value to the address assigned to this switch, only the OR gate 405 to which the signal connected to the data lines 258 and 259 is connected among the data lines 252, 253, 254, 256 and 257. The decoder 402 outputs L, and only one of the five signals is connected to the data line 258 and the other one is connected to the data line 259.

  FIG. 6 is a diagram showing a detailed configuration of the port switch 233.

  In the figure, reference numeral 501 denotes a decoder that generates signals for controlling the selection circuits 505 and 509, and 502 denotes a serial / parallel converter that converts serial data received from the port switch 229 into parallel data. Parallel conversion operation is performed in synchronization with the 64 KHz clock. Reference numeral 503 denotes a FIFO buffer for buffering parallel-converted data. A parallel / serial conversion unit 504 converts the parallel signal output from the FIFO buffer into serial data, and performs a conversion operation in synchronization with the 8 KHz clock and the 64 KHz clock supplied from the PHS engine unit 237. The FIFO buffer 503 prevents data errors due to the phase difference between the ISDN side clock and the PHS side clock. In other words, even if the timing at which the output data of the serial / parallel converter 502 changes and the data latch timing of the parallel / serial converter 504 coincide, the data is buffered by 2 bytes so that no data error occurs. It is what.

  Reference numeral 505 denotes a selection circuit for switching whether serial data is converted into an analog signal or output to a wireless line, and is controlled by the MPU 201 via the decoder 501. The output of this selection circuit is input to the PHS engine unit 237.

  Conversely, data output from the PHS engine unit 237 is output to the port switch 229 via the multiplexer 509, serial / parallel converter 508, FIFO 507, and parallel / serial converter 506.

  For 510-515, basically the same operations as 502-504 and 506-508 are performed. However, the parallel / serial conversion unit 512 and the serial / parallel conversion unit 515 operate at 8 KHz and 32 KHz clock timing, and 32 Kbps-64 Kbps speed conversion is performed in this circuit.

  FIG. 7 is a diagram showing a detailed configuration of the analog switch 217.

  In the figure, reference numeral 601 denotes a register that controls an analog switch, and data is written by the MPU 201 via a data bus.

  Reference numeral 602 denotes a decoder which converts data written in the register 601 and generates signals for controlling the analog switches 603 to 614 and the port switches 615 and 616.

  Reference numerals 603 to 614 are analog switch elements, which are composed of an input pin, an output pin, and a control pin. When the control pin is at a low level, the input pin and the output pin are connected, and when the control pin is at a high level, the input pin and the output pin are disconnected. .

  Reference numeral 616 denotes a port switch that controls whether the baseband processing units 239 and 240, the melody sound 218, and the call recording output 212 in the modem are connected to the handset or the speaker.

  Data to be sent to the baseband processing units 239 and 240 is selected by an analog switch based on the control of the MPU 201 from the output signal from the modem 213, the audio signal input from the handset 214, and the melody sound source 216. Specifically, a modem 213 is connected when performing FAX communication, a handset 214 is connected when a handset call is performed, and a melody sound source 216 is connected during holding.

  Conversely, during FAX communication, data output from the baseband processing units 239 and 240 is input to the modem 213. During a call, the port switches 615 and 616 can be switched to output the audio signal output from the baseband processing unit to the handset or speaker. During holding, the signal output from the holding sound source 216 is connected to the handset 214 or the speaker 215, and when listening to the voice recorded in the call recording unit in the modem 212, the signal output from the modem 212 is used as the handset 214. Or connected to a speaker 215.

  As described above, a plurality of types of analog signals can be switched and input to the baseband processing unit according to the operation mode, and communication can be performed on the ISDN line or the wireless line.

  FIG. 8 is a diagram showing a PHS radio transmission frame format, where (a) is an SCCH (individual cell call) frame used when establishing a radio link, (b) is a PCH (simultaneous call channel) frame, and (c) is It is a frame such as TCH or FACCH used for normal data communication.

  FIG. 9 is a diagram showing a frame format used in the wireless data transmission protocol (PIAFS). (A) is a negotiation frame transmitted and received to establish protocol selection and frame synchronization. (B) is in communication. (C) is a control frame for transmitting / receiving control information, and (d) is a data frame for transmitting / receiving user data. When performing data communication using PIAFS, first use negotiation frames to perform in-band negotiation, frame synchronization establishment, response delay time measurement, etc., then set communication parameters using control frames, and perform data communication using data frames. Start.

  FIG. 10 shows a frame format of PPP (Point to Point Protocol). In the figure, the flag is a pattern indicating the start and end of a frame of 01111110, the address is a fixed pattern of 11111111, the control is a fixed pattern of 00000011, the protocol is 2-byte data indicating the type of the network layer protocol to be used, and the data is PPP The variable length transmission information including control data, user data, and the like, FCS is a data error detection code.

  FIG. 11 is a flowchart of the voice communication operation by the PHS telephone and the PIAFS communication operation by the wireless data terminal.

  FIG. 12 is a flowchart of data communication operation by a PC connected by wire.

  FIG. 13 is a flowchart of synchronous PPP data communication operation by a PC connected wirelessly.

  The program for executing the processing shown in the flow of FIG. 11, FIG. 12, and FIG. 13 is a program memory storing application programs in the data terminal, a ROM built in the CPU 238, and a ROM 203 for each processing. It is stored as a program executed by a necessary computer (or microcomputer).

  FIGS. 14 and 15 are diagrams showing communication sequences at the time of outgoing / incoming calls in a wireless communication apparatus accommodating a wireless telephone and a wireless data terminal.

  Next, operation processing (method) and data flow in various operation modes that can be executed by the wireless communication apparatus according to the first embodiment will be described.

1. Voice Communication Operation by PHS Telephone 102 An operation when the PHS telephone 102 performs voice communication with a partner connected via ISDN will be described. When dialed by a key operation of the PHS telephone 102, outgoing processing is performed between the wireless communication apparatus 101 and the PHS telephone 102 according to the sequence shown in FIG.

  Specifically, first, the PHS telephone 102 transmits a link channel establishment request for a radio link to the radio communication apparatus 101 through the SCCH channel. In the wireless communication apparatus 101, when the CPU 238 in the PHS engine unit 237 receives a wireless link channel establishment request via the antenna 242, the high frequency unit 241, and the baseband processing unit 239 (S1001), the link channel is transmitted to the PHS telephone 102. Send an assignment message.

  The PHS telephone 102 that has received the link channel assignment from the wireless communication apparatus 101 via the SCCH transmits a call setting message. Upon receiving the call setting message, the CPU 238 sends a call setting confirmation message to the PHS telephone 102. Upon receiving the call setting confirmation message, the PHS telephone 102 exchanges messages related to radio management and mobility management with the CPU 238, and then sends an additional information message. Send. When the CPU 238 receives the additional information message, it notifies the MPU 201 by the serial communication data 244 that there has been a request for transmission to ISDN (S1002).

  Receiving the transmission request, the MPU 201 starts the transmission process of the ISDN interface 225 (S1003). The ISDN interface 225 performs DMA transfer of the layer 3 message stored in the memory 204 by the MPU 201 and exchanges messages with the ISDN (S1004). When the response message is received from the ISDN (S1005), the ISDN interface 225 generates an interrupt to the MPU 201. When the MPU 201 that has received the interrupt recognizes the response from the other party, the MPU 201 sends a response notification to the CPU 238. Receiving it, the CPU 238 transmits a response message to the PHS telephone 202 via the baseband processing unit 239 and the like (S1006), and thereafter, the communication channel is connected between the PHS telephone 202 and the wireless communication apparatus 101.

  At the same time, the MPU 201 switches the port switch so as to connect the call channel of the PHS telephone 202 and the ISDN B channel. In this example, since the voice transmitted / received by the PHS telephone 202 is transmitted / received by the baseband processing unit 239 and transmitted by the data line 247, the switch 234 of the port switch 233 is controlled to connect the data line 247 to the data line 252. . Further, the port switch 229 is switched so that the data line 252 to which the switch 234 is connected is connected to the data line 258 of the ISDN B1 channel (S1008).

  Further, when voice communication is performed with a PHS telephone, a line echo is generated due to the delay caused by the PHS frame assembling / disassembling process, so it is necessary to operate an echo canceller. Therefore, the MPU 201 performs setting so that the echo canceller 226 starts the echo canceling operation via the port switch 229 (S1009).

  Through the above processing, the voice input from the PHS telephone 202 is received by the PHS baseband processing unit 239, and the received PCM data is transmitted to the ISDN via the echo canceller 226, the ISDN interface 225, the DSU 223, and the connector 222. The voice data received from the ISDN is also transmitted to the PHS telephone 102 through the same route.

2. ISDN access operation of the PC 103 When the PC 103 performs data communication with the other party connected via the ISDN, the communication application software of the PC 103 is activated and a destination number is transmitted by an AT command. When the wireless communication apparatus receives the command (S1101), the data is input to the serial communication controller 219 via the RS232C connector 221. When receiving the data, the serial communication controller 219 generates an interrupt to the MPU 201 (S1102), and the MPU 201 transfers the data stored in the serial communication controller to the memory 204 (S1103).

  When the MPU 201 analyzes the received data and recognizes that it is a transmission request, the MPU 201 activates the transmission process of the ISDN interface 225 (S1104). The ISDN interface 225 performs DMA transfer of the layer 3 message stored in the memory 204 by the MPU 201, and exchanges messages with the ISDN (S1105). When the response message is received from the ISDN, the ISDN interface 225 generates an interrupt to the MPU 201. When the MPU 201 that has received the interrupt recognizes the connection with the partner, the ISDN interface 225 notifies the PC 103 via the serial communication controller 219 (S1107). .

  Further, the MPU 201 controls the port switch 229 to connect the data line 257 and the data line 258 (S1108). Therefore, the data output from the HDLC controller 227 is transmitted to the ISDN via the echo canceller 226, the ISDN interface 225, the DSU 223, and the connector 222. At this time, since it is not necessary to perform echo cancellation processing in data communication, the MPU 201 sets the echo canceller 226 to the through mode via the port switch 229 (S1109). Thus, the data communication channel is connected, and the PC 103 can transmit / receive data to / from the ISDN (S1110).

  Receiving the connection notification, the PC 103 starts data transmission thereafter. At this time, the data to be transmitted has a frame configuration according to asynchronous PPP (Point to Point Protocol) shown in FIG.

  Data transmitted from the PC 103 is stored in the memory 204 via the serial communication controller 219 in the same manner as the previous AT command data. That is, when data is received (S1111), the serial communication controller 219 generates an interrupt to the MPU 201 (S1112), and the MPU 201 transfers the data to the memory 204 (S1113). Since the stored data conforms to asynchronous PPP, it may include the same pattern as the HDLC flag pattern (01111110) used when transmitting to ISDN. Therefore, the data stored in the MPU 201 is read, and a PPP asynchronous / synchronous conversion process is performed so that the flag pattern does not appear in the data (S1114). Specifically, when the same bit string as the flag pattern appears, a process of replacing the control escape (01111101) + the sixth bit of the flag pattern with inverted data (01011110) is performed.

  After that, the MPU 201 transfers data other than the flag pattern to the HDLC controller 227 (S1115), and the HDLC controller 227 transmits data 255 synchronized with the 64 KHz clock extracted from the ISDN to the port switch 229 and passes through the ISDN interface 225. Is transmitted to ISDN (S1116).

Conversely, when data is received from the ISDN (S1117), it is input to the HDLC controller 227 via the connector 222, DSU 223, ISDN interface 225, echo canceller 226, and port switch 229. When the HDLC controller 227 detects a flag pattern from the received data (S1118), it generates an interrupt to the MPU 201, and the MPU 201 stores the received data in the memory 204 (S1119). The MPU 201 performs PPP synchronous / asynchronous conversion processing of the stored data (S1120), and then transmits it to the PC 103 via the serial communication controller 219 (S1121).
By the above procedure, the PC 103 can perform data communication via ISDN.

3. Data transmission by PIAFS from PC 106 When the PC 106 is connected via ISDN and performs data communication with a partner capable of performing PIAFS data communication, the communication application software of the PC 106 is activated, and the PIAFS card 105 connected to the PC 106 A call origination request is issued. In the PIAFS card 105, a call request is issued to the connected PHS phone 104, and the PHS phone 104 that has received the call request receives the call as shown in “1. Voice communication operation by the PHS phone 102”. 14 makes a call to the wireless communication apparatus 101, and the wireless communication apparatus 101 makes a call to ISDN (S1001 to S1004). However, in this case, the information element in the call setting message is set to 32 Kbps unrestricted digital data.

  When receiving a response from the ISDN (S1005), a response message is transmitted to the PHS phone 104 (S1006) as in “1. Voice communication operation by the PHS phone 102” (S1006), and the PHS phone 104 passes through the PIAFS card 105. The PC 106 is notified that the other party has responded.

  On the other hand, in the wireless communication apparatus 101, since the information element in the previous call setting message is set to 32 Kbps unrestricted digital data, it is determined that the transmission data is PIAFS data, and the switch 230 in the port switch 229 Switch 231 is switched. Specifically, the signal on the data line 251 is I.I. The switch 231 is switched so as to be connected to the data line 252 via the 460 conversion unit 236, and the switch 230 is switched so that the data line 252 is connected to the data line 258 (S1011). Further, the echo canceller 226 is set to the through mode (S1012). The data communication channel is connected by the above procedure (S1013).

  After establishing the communication channel, the PIAFS protocol is first negotiated between the PC 106 and the partner terminal. The PIAFS negotiation frame transmitted by the PIAFS card 105 is received by the PHS baseband processing unit 239 of the wireless communication apparatus 101 via the PHS telephone 104. The received 32 Kbps data is transmitted via the data line 251 to the I.D. After being converted to 64 Kbps by the 460 conversion processing unit 234, it is transmitted to the ISDN via the port switch 229, the echo canceller 226, the ISDN interface 225, and the DSU 223.

  In this manner, PIAFS data can be transmitted / received to / from a partner connected via ISDN, so that data transmission / reception can be performed after establishing a PIAFS link with a partner according to a predetermined negotiation according to the PIAFS protocol. Is started.

  The data (PPP protocol format) transmitted by the PC 106 is added to the PIAFS card 105 with a PIAFS header and a trailer, sent to the other party in the same flow as the negotiation frame, and the PIAFS header and trailer are deleted at the other party. Only the stored PPP protocol format data is retrieved and processed by the upper software.

4). PPP transmission of PIAFS data from PC 106 A case will be described where the PC 106 is connected via ISDN and performs data communication with a partner that cannot perform PIAFS data communication. In this case, since data must be transmitted to the other party in the form of PPP data, data conversion processing is required inside the wireless communication apparatus 101.

  When data transmission is performed from the PC 106, the communication application software of the PC 104 is activated, and a transmission request is issued to the PIAFS card 105 connected to the PC 106. The PIAFS card 105 issues a call request to the connected PHS phone 104, and the PHS phone 104 that has received the call request receives the call request as shown in “1. Voice communication operation by the PHS phone 102”. Is transmitted to the wireless communication apparatus 101 according to the sequence shown in FIG. In the PHS engine unit 237 of the wireless communication apparatus 101, when a call request is received from the PHS telephone (S1201), an interrupt is generated for the MPU 201 (S1202), and the MPU 201 activates the ISDN interface call process (S1203). A call setup message is transmitted to the ISDN (S1204). However, in this case, since the synchronous PPP data of 64 Kbps is transmitted, the information element in the call setting message is set to 64 Kbps unrestricted digital data.

  When receiving a response from the ISDN (S1205), a response message is transmitted to the PHS phone 104 (S1206) as in “1. Voice communication operation by the PHS phone 102” (S1206), and the PHS phone 104 passes through the PIAFS card 105. The communication channel is established by notifying the PC 106 that the other party has responded.

  On the other hand, in the wireless communication apparatus 101, the switch 230 and the switch 231 in the port switch 229 are switched in order to transmit the received PIAFS data to the ISDN as synchronous PPP data. Specifically, the signal on the data line 251 is I.I. The switch 231 is switched so as to be connected to the 32 Kbps PIAFS data interface of the PIAFS controller 228 via the data line 255 via the 460 conversion unit 236, and at the same time, the 64 Kbps data interface of the HDLC controller 227 is connected to the data line 258 via the data line 257 and the switch 230. The switch 230 is switched so as to be connected (S1207). The echo canceller 226 is set to the through mode, and the I.D. The 460 conversion processing unit 236 is also set to the through mode in which the conversion process is not performed (S1209).

  After establishing the communication channel, the PIAFS protocol is first negotiated between the PC 106 and the PIAFS controller 228 in the wireless communication apparatus 101. The communication parameter setting request frame transmitted by the PIAFS card 105 is received by the PHS baseband processing unit 239 of the wireless communication apparatus 101 via the PHS telephone 106 (S1210). The received 32 Kbps data is transmitted via the data line 251 to the I.D. The data is input to the 460 conversion processing unit 234. I. Since the 460 conversion processing unit is set to the through mode, it is input to the port switch 229 without data conversion. Data input to the port switch 229 is input to the PIAFS controller 228 via the switch 231.

  In response to the communication parameter setting request frame, the PIAFS controller transmits a communication parameter setting acceptance frame to the PC 106 via the PHS engine unit 237 (S1211). When a predetermined negotiation procedure is completed, a wireless data transmission link (PIAFS link) is established. (S1212).

  When the PIAFS link is established between the PIAFS card 105 and the PIAFS controller 228, transmission of data transmitted from the PC 106 to the ISDN is started thereafter. Specifically, the PIAFS card 105 adds a PIAFS header and a trailer to the PPP format data transmitted from the PC 106 and inputs the PIAFS controller 228 in the same manner as in the negotiation frame.

  The PIAFS controller 228 that has received the data deletes the header and trailer of the PIAFS frame and transfers the PPP data to the memory 204 (S1213). Thereafter, after the PPP data is converted into the synchronous PPP format (S1214), the MPU 201 writes the data stored in the memory 204 to the HDLC controller 227 (S1215), and the HDLC controller 227 receives the data in synchronization with the ISDN 64 KHz timing. Is sent out. The transmitted data is transmitted to the ISDN via the switch 230, the echo canceller 226, the ISDN interface 225, and the DSU 223 (S1216).

  Conversely, when data is received from ISDN (S1217), it is input to HDLC controller 227 via connector 222, DSU 223, ISDN interface 225, echo canceller 226, and port switch 229. When the HDLC controller 227 detects a flag pattern from the received data (S1218), it generates an interrupt to the MPU 201, and the MPU 201 stores the received data in the memory 204 (S1319). The MPU 201 performs PPP synchronous / asynchronous conversion processing of the stored data (S1220), adds a header and trailer by the PIAFS controller 228, and transmits the result to the PC 106 via the PHS engine unit 237 (S1221). .

  As described above, the ISDN can perform synchronous PPP data communication while transmitting and receiving PIAFS data to and from the PC 106.

5). Facsimile Transmission When facsimile transmission is activated on the operation panel 210, a document is read by the scanner 209, and the read image data is G3 facsimile encoded by the FAX engine 205 and then sent to the FAX modem 213.

  An analog signal of 9600 bps modulated by the FAX modem 213 is input to the analog switch 217, connected to the PHS engine 235, and PCM-encoded by the codec in the PHS baseband processing unit 239 or 240. At this time, the analog switch 217 is switched so that the codec which is not used by the PHS baseband processing units 239 and 240 is used. For example, when the PHS baseband processing unit 239 is not used, the signal output from the FAX modem 213 is input to the PHS baseband processing unit 239 via the data line 243, and the PCM encoded data is input to the data line 247. Is input to the port switch 233.

  The port switch 233 and the port switch 229 are switched so that the data line 247 is connected to the data line 258, and transmitted to the ISDN via the echo canceller 226, ISDN interface 225, and DSU 223. The echo canceller 226 is set to the through mode.

  In the conventional facsimile, the analog signal modulated by the FAX modem 213 is transmitted as it is to the analog line. In the configuration of the present embodiment, since a CPU independent of facsimile processing is used for the wireless line control unit and ISDN control, the conventional facsimile unit can be used as it is without major design changes. In addition, the command that the conventional facsimile unit exchanges with the data terminal via the parallel interface is also used in the data terminal via the PHS system, and communicates with the CPU 206 of the facsimile unit via the shared register 207. Thus, the data terminal 106 connected to the PHS system can also use the color printer 208 and the color scanner 209 of the facsimile unit.

  Note that the communication of voice input from the handset is realized by changing the connection of the analog switch 217 from the time of the facsimile communication and simultaneously setting the echo canceller 226 to the echo cancel mode, and the data flow is as follows. This is similar to the case of facsimile communication.

6). Printing from the PC 106 When printing from the PC 106, the PIAFS link is established between the PIAFS card 105 and the wireless communication apparatus 101 in the same manner as described in “4. PPP transmission of PIAFS data from the PC 106”, and then the PC 204 Is stored in the memory 204.

  Data stored in the memory 204 is written into the shared register 218 by the MPU 101. When a predetermined amount of data is written to the shared register, the shared register generates an interrupt to the CPU 206 of the FAX engine 205, and the CPU 206 that receives the interrupt transfers the data in the shared register to the printer 208 and prints it out.

(Second Embodiment)
In the first embodiment described above, it is assumed that one wireless channel performs wireless data communication at the same time. However, by changing the hardware configuration diagram of FIG. 2 as shown in FIG. 16, wireless data communication by two channels can be performed.

  Specifically, the 5to2 switch 230 is replaced with the 7to2 switch 1401, the PIAFS controller 1402 is added, the switch 1403 is added, This can be realized by adding the 460 processing unit 1404 and performing the PIAFS processing corresponding to each of the PHS baseband processing units 239 and 240.

(Third embodiment)
In the first embodiment described above, PHS (Personal Handy-phone System) is assumed as the wireless communication method, and PIAFS is assumed as the wireless data transmission protocol. However, these can achieve the same effect even when other wireless communication methods and wireless data transmission protocols are used.

(Fourth embodiment)
In the above embodiment, only the case where one of the channels that can be used in PHS communication or ISDN communication is used has been described. However, it is also possible to communicate using other channels by switching the port switch. It is also possible to communicate using two channels simultaneously.

(Fifth embodiment)
In the embodiment described above, the CPU 206 of the FAX engine unit 206 controls the handset 214, speaker 215, and hold melody generation unit 216 of FIG. 2, but the FAX modem 213 is controlled by the CPU 206 as shown in FIG. The handset 214, the speaker 215, and the hold melody generating unit 216 may be controlled by the MPU 201.

  In the first embodiment described above, various communication operations have been described with reference to the flowcharts of FIGS. However, the above-described various communication operations are executed as a control operation of each part constituting this apparatus by a plurality of microcomputers (MPU 201, CPU 206, CPU 238) executing respective control programs in conjunction with each other. .

  The control operation executed by each microcomputer will be described below.

  The MPU 201 performs ISDN call control, control of a serial interface for exchanging data with a PC, control of each data path of voice communication, data communication, and FAX communication, and management of resources.

  The CPU 206 controls peripheral devices (the color printer unit 208, the color scanner unit 209, the operation panel 210, and the FAX modem unit 213) in the FAX engine unit and manages their resources.

  The CPU 238 controls the PHS baseband processing units 239 and 240 and the RF unit in the radio unit 237 and manages those resources.

  Note that control programs for executing the control operations described below are stored in ROMs in the MPU 201, the CPU 206, and the CPU 238, respectively.

(1) Control Operation of MPU 201 FIG. 22 is a flowchart showing a control operation for system initialization.

  First, when the apparatus power is turned on (S2001), the MPU 201 starts each device (activates each device), issues an initialization command to the CPU 206 (S2002), and further issues an initialization command to the CPU 238. Issue (S2003). A command is transmitted to the CPU 206 via the serial communication 243 and to the CPU 238 via the serial communication 244.

  FIG. 23 is a flowchart showing a signal reception control operation from the CPU 206 of the MPU 201.

  When a command is received from the CPU 206 via the serial communication port 243 (S2101), it is determined whether or not the received command is a FAX start command and a telephone number (S2102). The information in the common register 218 is read to check whether or not the line is free (S2103, S2104). If the line is free, status information indicating that FAX communication is in progress is written to the common register 218 (S2105). Then, control for connecting a line using the ISDNI / F 225 is executed (S2106). For example, when the B1 channel is connected, the path of the analog switch 217 is connected to the FAX modem 213 and the analog signal 245. Then, the path 234 of the switch 233 is connected to the PCM data 247, and the path of the switch 230 is connected to the port 252 and the port 258 (S2107). Further, a command is sent to the CPU 238 via the serial communication 244 so as to connect the path in the PHS baseband processing unit 239 to the analog signal 245 and the PCM data 247 (S2108). Then, a connection completion command is sent to the CPU 206 via the serial port 243 (S2109).

  When a telephone start command and a telephone number are sent from the CPU 206 via the serial communication port 243 (S2111), the MPU 201 analyzes whether the call is for an extension line or an external line. Then, the information in the common register 218 is read, and it is confirmed whether or not the ISDN line or PHS radio is free (S2112, S2113). Status information during a telephone call is written in correspondence with the call path (S2114). In the case of a telephone addressed to an outside line (S2115), control for line connection is executed using ISDNI / F225 (S2116). For example, when the B1 channel is connected, the path of the analog switch 217 is connected to the handset 214 and analog. Connect to signal 245. Then, the path 234 of the switch 233 is connected to the PCM data 247, and the path of the switch 230 is connected to the port 252 and the port 258 (S2117). Further, a command is sent to the CPU 238 via the serial communication 244 so as to connect the path in the PHS baseband processing unit 239 to the analog signal 245 and the PCM data 247 (S2118). Then, a connection completion command is sent to the CPU 206 via the serial port 243 (S2119). In the case of a telephone addressed to an extension, a wireless connection command is sent to the CPU 238 via the serial communication 244 (S2120). When the CPU 238 returns a connection completion command for the first channel (S2121), the path of the analog switch 217 is connected to the handset 214 and the analog signal 245 (S2122). Further, a connection completion command is sent to the CPU 206 via the serial communication 244 so as to connect the path in the PHS baseband processing unit 239 to the analog signal 245 and the RF unit 241 to the CPU 238 (S2124).

  FIG. 24 is a flowchart showing a data communication control operation by an information processing terminal (for example, a personal computer, hereinafter referred to as a PC) connected by a wired interface.

  The wireless communication apparatus of this embodiment is configured to be able to transmit and receive data with a PC by RS232C221. When transmitting / receiving the data, the data from the PC is stored in the SRAM 204 via the RS232C controller, and the MPU 201 analyzes this. In this system, an AT command is used as a control command when communicating with a PC. Therefore, if the data sent from the PC is an AT command, it is recognized as control data, and otherwise it is recognized as actual data.

  First, when a control command for a data transmission request is sent from the PC via the RS232C controller 219 (S2201), the MPU 201 reads information in the common register 218 and confirms whether the ISDN line is free. (S2202), if the line is not free, a command indicating that connection is impossible is sent to the PC via the RS232C controller 219. If the line is free, status information indicating that the ISDN line is in data communication is written to the common register 218 (S2203). Then, control for connecting a line using the ISDNI / F 225 is executed (S2204). For example, when the B1 channel is connected (S2205), the port 257 and the port 258 of the switch 230 are connected (S2206), and RS232C A connection completion control command is sent to the PC via the controller 219 (S2207). Then, the actual data from the PC stored in the SRAM 204 via the RS232C controller 219 is stored (S2208), temporarily stored in the SRAM 204 (S2209), and the data stored in the SRAM 204 is written to the HDLC controller 227 (S2210). (S2211). When data is received from the ISDN line (S2212), the data received from the ISDN line is temporarily stored in the SRAM 204 (S2213) and sent to the PC via the RS232C controller 219 (S2214).

  FIG. 25 is a flowchart showing a signal reception control operation from the CPU 238 of the MPU 201.

  When an incoming command is received from the CPU 238 via the serial communication 244 (S2301), it is analyzed whether it is a telephone or data communication and if it is a telephone (S2302), the CPU checks whether it is addressed to the parent device or externally (S2303). ).

  If the address is addressed to the parent device, the status information of the common register 218 is read (S2304). If the parent device handset is available (S2305), the status of the parent device handset in the common register 218 is set in use (S2306). Then, the handset 214 and the analog signal 245 are connected to the path of the analog switch 217 (S2307). Further, via the serial communication 244, the CPU 238 is instructed by a command to connect the switch in the PHS baseband processing unit 239 to the analog signal 245 and the RF unit 241 (S2308), and a connection completion command is sent to the CPU 238. Return (S2309).

  In the case of addressing to the outside, the status information of the common register 218 is read (S2311), and if the ISDN line is free (S2312), the status of the ISDN line of the common register 218 is set to communication (S2313). Furthermore, it goes to connect the ISDN line (S2314). For example, when using the ISDNB1 channel, the switch 234 in the switch 233 is connected to the analog signal 247, and the port 258 and the port 252 of the switch 229 are connected (S2315). Further, via the serial communication 244, the CPU 238 is instructed by a command to connect the switch in the PHS baseband processing unit 239 to the analog signal 245 and the RF unit 241 (S2316), and a connection completion command is sent to the CPU 238. Return (S2317).

  In the case of data communication (S2318), the status information of the common register 218 is read (S2319), and if the ISDN line is available (S2320), the status of the ISDN line of the common register 218 is set to communication (S2321). Further, the ISDN line is connected (S2322). When the PIAFS data flowing from the PHS is directly sent to the ISDN line, it is connected to the port 254 of the switch 231 and the port 254 and the port 258 of the switch 230 are connected (S2323). Further, via the serial communication 244, the CPU 238 is instructed by a command to connect the switch in the PHS baseband processing unit 239 to the 32 Kbps data communication 251 and the RF unit 241 (S2324), and a connection completion command is sent to the CPU 238. (S2325). As a result, 32 Kbps speed data flowing from the PHS is converted to 64 Kbps data through the I460 converter 236 and flows on the ISDN.

  When converting the PIAFS data flowing from the PHS into the PPP data, the data is connected to the port 255 of the switch 231 and the port 257 and the port 258 of the switch 230 are connected (S2323). Further, via the serial communication 244, the CPU 238 is instructed by a command to connect the switch in the PHS baseband processing unit 239 to the 32 Kbps data communication 251 and the RF unit 241 (S2324), and a connection completion command is sent to the CPU 238. (S2325). As a result, the PIAFS data coming from the PHS is once stored in the SRAM 204 as PPP data via the PIAFS controller 228. Then, data is transmitted to the line via the HDLC controller 227.

FIG. 26 is a flowchart showing an incoming call control operation from ISDN.
When there is an incoming signal from the ISDN I / F 255 (S2401), the MPU 201 analyzes the content of the incoming call (S2402).

  In the case of an incoming voice call, the destination is confirmed (S2403). In particular, when there is no designation for the master unit or the slave unit, the shared register is first read to confirm whether the handset of the master unit is used (S2405). If not used (S2406), the MPU 201 connects the path of the analog switch 217 to the speaker 215 and the analog signal 245 (S2407). Then, a ring tone generation request command is issued to the CPU 238 via the serial communication 244 (S2408). When the CPU 238 receives the ring tone generation command, the CPU 238 generates a ring tone using the sound source in the PHS baseband processing unit and sends it to the analog signal 245. Further, the MPU 201 issues an incoming call request command to the CPU 238 via the serial communication 244 (S2409). The CPU 238 starts wireless connection using the PHS baseband processing unit 239 and the RF unit 241 (S2410). When the handset of the parent device is off-hooked (S2411), the MPU 201 issues a ringing tone stop command to the CPU 238 via the serial communication 244 (S2412). Further, a response is returned to the ISDN side (S2413), and the ISDN is connected. Further, the status of the handset of the shared register is set to being in use (S2414). For example, when the B1 channel is connected, the MPU 201 connects the path of the analog switch 217 to the handset 214 and the analog signal 245, and the switch 230 connects the port 258 and the port 252. The switch 234 connects to the PCM data 247 (S2415), and further instructs the CPU 238 via the serial communication 243 to connect the switch in the PHS baseband processing unit 239 with the PCM data 247 and the analog signal 245 (see FIG. S2416). Then, a PHS disconnection command is issued to the CPU 238 via the serial communication 244 (S2417).

  When the slave unit is responded, the CPU 238 issues a response command to the MPU 201 via the serial communication 244. The CPU 201 issues a ringtone stop command to the CPU 238 via the serial communication 244 (S2418). Further, a response is returned to the ISDN side (S2419), and the ISDN is connected. For example, when the B1 channel is connected, the MPU 201 connects the path of the analog switch 217 to the handset 214 and the analog signal 245, and the switch 230 connects the port 258 and the port 252. The switch 234 connects to the PCM data 247 (S2420), and further instructs the CPU 238 via a serial communication 244 to connect the switch in the PHS baseband processing unit 239 with the PCM data 247 and the RF unit 241 (step S2420). S2421).

  In the case of a FAX incoming call, the MPU 201 reads the common register 218 and confirms the status of the peripheral for FAX reception (S2422). If it is available (S2423), a FAX reception command is issued to the CPU 206 via the serial communication 243 (S2424). When a FAX reception confirmation command is received from the CPU 206 via the serial communication 243 (S2425), the MPU 201 writes the FAX reception status in the shared register 218 (S2426), returns a response to the ISDN side, and makes an ISDN connection (S2427). ). For example, when the B1 channel is connected, the MPU 201 connects the path of the analog switch 217 to the FAX modem 213 and the analog signal 245, and connects the port 258 and the port 252 with the switch 230. Then, the switch 234 connects to the PCM data 247 (S2428), and further instructs the switch in the PHS baseband processing unit 239 by a command to connect the PCM data 247 and the analog signal 245 to the CPU 238 via the serial communication 244 ( S2429).

  In the case of incoming data, the destination is confirmed (S2430). In particular, when there is no designation for the parent device or the child device, the shared register is first read to confirm whether the PC connected to the parent device is being used (S2431). If it is available (S2432), an incoming command is issued to the PC via the RS232C controller (S2433). Further, the MPU 201 issues an incoming request command to the CPU 238 via the serial communication 244 (S2434). The CPU 238 starts wireless connection using the PHS baseband processing unit 239 and the RF unit 241 (S2435). When a response is returned from the PC connected to the parent device (S2436), the MPU 201 returns a response to the ISDN side and performs ISDN connection (S2437). Further, the PC status of the shared register is set to being used (S2438). For example, when the B1 channel is connected, the MPU 201 connects the port 258 and the port 257 with the switch 230 (S2439). Then, a PHS disconnection command is issued to the CPU 238 via the serial communication 244 (S2440). The received data is stored once in the SRAM 204 via the HDLC controller 227. The MPU 201 sends the accumulated data to the PC via the RS232C controller 219 (S2441).

  When the slave unit is responded, the CPU 238 issues a response command to the CPU 201 via the serial communication 244. The MPU 201 issues an incoming call stop command to the PC via the RS232C controller 219 (S2442). Further, a response is returned to the ISDN side, and the ISDN is connected (S2443). For example, when the data is PPP data when connected by the B1 channel, the switch 258 connects the port 258 and the port 257. Then, the switch 231 connects to the port 255 (S2444), and further instructs the CPU 238 via the serial communication 244 to connect the switch in the PHS baseband processing unit 239 with the command to connect the 32 Kbps data communication 251 and the RF unit 241 ( S2445). The received data is stored in the SRAM 204 once via the HDLC controller. The MPU 201 passes the accumulated data to the PIAFS controller 228, further converts the speed by the I460 conversion 236, and sends it to the wireless unit 237. In the case of PIAFS data, the switch 230 connects the port 258 and the port 254. Then, the switch 231 connects to the port 254 (S2444), and further instructs the CPU 238 via the serial communication 244 to connect the switch in the PHS baseband processing unit 239 with the command to connect the 32 Kbps data communication 251 and the RF unit 241 ( S2445). The received data is passed through the PIAFS controller 228, further converted in speed by the I460 conversion 236, and sent to the wireless unit 237.

(2) Control Operation of CPU 206 FIG. 27 is a flowchart showing the communication control operation of the CPU 206.

  In the FAX unit, when a key is input from the operation panel 210, a command is received from a PC via the parallel communication unit 211, or a command is received from the MPU 201 via the serial communication 243 (S2501), the command is analyzed. (S2502), the operation of each peripheral is started. In addition, if a key is input from the operation panel 210 or a command is received from a PC via the parallel communication unit 211 and the command is for a peripheral that is not managed by itself, a command is sent to the MPU 201 via the serial communication 243. Pass as. Further, the status of the peripheral whose operation has been started is written in the common register 218.

  For example, when a FAX transmission command is received from the PC via the operation panel or the parallel communication unit 211 (S2503), a FAX start command (S2504) and a telephone number are sent to the MPU 201 via the serial communication port 243 (S2505). ). When a connection completion command is returned from the MPU 201 (S2506), the status of the color scanner and FAX modem in the shared register is set to being used (S2507), the color scanner unit 209 is moved, the data is read (S2508), and the FAX modem is used. The data is encoded (S2509), and the data is sent to the analog switch 217 (S2510).

  Also, for example, when a FAX reception command is received from the MPU 201, the status of the color printer and FAX modem in the shared register is set in use (S2511), and a FAX reception confirmation command is sent to the CPU 201 via the serial communication port 243 (S2512). . When data is received from the analog switch 217 (S2513), it is decoded by the FAX modem 213 (S2514) and printed out by the color printer 208 (S2515).

(3) CPU 238
FIG. 26 is a flowchart showing the communication control operation of the CPU 238.

  First, an incoming call operation from the PHS side will be described.

  In the PHS unit, when the CPU 238 receives an incoming call from the PHS baseband processing units 239 and 240 (S2601), the radio channel resource is searched (S2602), and if the resource is free (S2603), the radio link is extended (S2603). S2604). When a wireless link is established and call setting control data is received from the wireless slave unit (S2605), the CPU 238 sends a call setting command to the MPU 201 via the serial communication data 244 (S2606). When receiving the call setting acceptance, calling, and response commands from the MPU 201 via the serial communication data 244, the CPU 238 creates each control data and sends it to the wireless slave unit. Further, the PCU 238 establishes a wireless connection such as authentication (S2607). Then, the MPU 201 receives the path setting command of the PHS baseband processing unit via the serial communication data 244 (S2608), and in accordance with this, the 32 Kbps data output from the RF unit 241 (240) is decompressed. It connects to the path 248 (250) that outputs at 64 Kbps, connects to the path 251 that outputs data of 32 Kbps, or connects to the analog signal path 245 (S2609). Thereafter, data communication is started (S2610).

  When disconnection control data comes from the wireless slave unit (S2611), the CPU 238 sends a disconnection command to the MPU 201 via the serial communication data 244 (S2612). Then, the wireless link is disconnected.

  Next, the transmission operation to the PHS side will be described.

  When a command for connection is received from the MPU 201 via the serial communication data 244 to the CPU 238 (S2613), the CPU 238 goes to confirm the availability of the wireless channel (S2614), and if it is available, goes to the wireless link (S2615). . When response control data is received from the wireless slave unit (S2616), a response command is sent to the MPU 201 via the serial communication data 244 (S2617). Furthermore, the PHS baseband processing unit path setting command is received from the MPU 201 via the serial communication data 244 (S2618), and the data of 32 Kbps output from the RF unit 241 (240) is decompressed accordingly. It connects to the path 248 (250) that outputs at 64 Kbps, connects to the path 251 that outputs data of 32 Kbps, or connects to the analog signal path 245 (S2619). Thereafter, data communication is started (S2620).

  When a disconnection command is received from the MPU 201 via the serial communication data 244 to the CPU 238 (S2621), the CPU 238 disconnects the wireless link (S2612).

  In addition to this, the CPU 238 uses the sound source of the PHS baseband processing unit 239 in response to the sound generation command from the MPU 201 via the serial communication data 244 to specify the specified sound (analog signal path 245, Or a path 248 output at 64 Kbps or a path from the RF unit 241).

  The present invention is not limited to the above-described embodiment, and various modifications can be made.

  As described above, since the PC and the terminal adapter are connected by wireless data communication, the PC can be used even when the place where the PC is installed is remote from the place where the PC is installed.

  In addition, the built-in terminal adapter, facsimile, printer, scanner, and PHS main unit functions enable space saving and high cost performance, and wirelessly connected data terminals and wired connections. Communication using any one of data terminals, wireless telephones, handsets, facsimiles and the like is possible.

  Further, since different computers (CPUs) are used in the facsimile processing unit and other processing units, the present invention can be implemented without changing the circuit configuration of the conventional facsimile.

  In addition, the terminal adapter is provided with a printer, a scanner, a facsimile, and a telephone function, and integrated control makes it possible to improve operability and at the same time save space and cost.

  In addition, since it uses a multi-CPU and a shared register, it is possible to add a terminal adapter function and a PHS master unit function without greatly changing the conventional facsimile apparatus, and it has high expandability. A wireless communication device can be realized.

  In addition, for example, it is possible to connect to a public communication line from a data terminal (such as a PC) connected by wire, a data terminal (PIAFS compatible terminal) connected wirelessly, or a wireless telephone (PHS telephone). It becomes.

  In addition, for example, data transmission can be performed while making a telephone call using a wireless telephone by effectively using two channels of ISDN.

  Also, for example, two of a data terminal (such as a PC) connected by wire, a data terminal connected wirelessly, and a wireless telephone can be simultaneously connected to the ISDN.

  For example, when accommodating a data terminal and a plurality of wireless telephones, two of the data terminal and the plurality of wireless telephones can be simultaneously connected to the ISDN.

  Further, for example, two of the data terminal, the wireless telephone, and the handset attached to the wireless communication apparatus main body can be simultaneously connected to the ISDN.

  In addition, for example, it is possible to transmit data according to the wireless data transmission protocol (PIAFS) to a partner that does not support the wireless data transmission protocol.

  In addition, for example, it is possible to transmit data received from a wireless data terminal to a partner regardless of whether the partner is compatible with PIAFS.

  For example, data transmitted from a wireless data terminal at 32 Kbps can be transmitted to a 64 Kbps ISDN line.

  In addition, for example, in the case of voice communication, it is possible to select an optimum route for each of data communication.

  In addition, the facsimile function can be realized and the resources in the system can be used efficiently as the entire system.

  In addition, for example, the wireless data PCM conversion process and the analog signal PCM conversion process are performed by a common analog / digital conversion processing unit, and the size and cost can be reduced.

  In addition, it is possible to remove the line echo during the call and transmit the data without changing the data communication.

Further, it can be determined that data transmitted from a wirelessly connected data terminal is data that does not require echo cancellation processing.
It is also possible to record data sent from a data terminal connected wirelessly.
Further, for example, image data read by a scanner can be sent to a data terminal connected wirelessly.

Further, even when there is a difference in processing speed between the wireless data transmission protocol processing unit and the recording means or reading means, recording can be performed without causing data overflow.
Further, the configuration of the conventional facsimile can be used without drastically changing, and a wireless data communication processing function can be realized.

In addition, for example, by incorporating a DSU function, it is possible to eliminate the work and reduce the installation location, and at the same time connect other ISDN terminals to the bus.
In addition, it is possible to transfer data in byte units by adjusting the timing of serial data having different phases.

  In addition, the occurrence of data error can be prevented regardless of the value of the phase difference between the clock extracted from the digital public communication line and the clock of the digital wireless communication control unit.

  In addition, it is possible to operate the digital public communication line and the digital wireless communication line in synchronization with each other, and data underrun and overrun can be prevented.

  Further, even when the accuracy of the clock extracted from the digital public communication line is temporarily deteriorated, it is possible to maintain the accuracy of the clock for operating the digital wireless communication line within a predetermined range.

It is the block diagram which showed the structure of the system of the 1st Embodiment of this invention. 2 is a block diagram showing a configuration of a wireless communication apparatus 101. FIG. It is the block diagram which showed the detailed structure of the PHS engine part. 3 is a diagram illustrating a detailed configuration of a switch 230. FIG. 3 is a diagram illustrating a detailed configuration of a switch 230. FIG. 3 is a diagram showing a detailed configuration of a port switch 233. FIG. 3 is a diagram showing a detailed configuration of an analog switch 217. FIG. It is the figure which showed the PHS radio | wireless transmission frame format. It is the figure which showed the frame format used by a radio | wireless data transmission protocol (PIAFS). It is the figure which showed the frame format of PPP (Point to Point Protocol). It is a flowchart of the voice communication operation by the PHS telephone and the PIAFS communication operation by the wireless data terminal. It is a flowchart of a data communication operation by a PC connected by wire. It is a synchronous PPP data communication operation | movement flowchart by PC connected by radio | wireless. It is the figure which showed the communication sequence at the time of the outgoing / incoming call in the radio | wireless communication apparatus which accommodates a radio telephone and a radio | wireless data terminal. It is the figure which showed the communication sequence at the time of the outgoing / incoming call in the radio | wireless communication apparatus which accommodates a radio telephone and a radio | wireless data terminal. It is the block diagram which showed the structure of the radio | wireless communication apparatus of 2nd Embodiment. It is the figure which showed the structure of the system in the case of using the conventional terminal adapter. It is the figure which showed the internal structure of the conventional terminal adapter. It is the figure which showed the communication sequence at the time of the data transmission / reception of the conventional terminal adapter. It is the figure which showed the communication sequence at the time of the data transmission / reception of the conventional terminal adapter. It is the block diagram which showed the structure of the radio | wireless communication apparatus of 5th Embodiment. 5 is a flowchart showing a control operation of the MPU 201. 5 is a flowchart showing a control operation of the MPU 201. 5 is a flowchart showing a control operation of the MPU 201. 5 is a flowchart showing a control operation of the MPU 201. 5 is a flowchart showing a control operation of the MPU 201. It is the flowchart which showed the control operation of CPU206. It is the flowchart which showed the control operation of CPU238.

Explanation of symbols

201 MPU
202 Bus 203 ROM
204 SRAM
205 Facsimile engine 206 CPU
207 Internal bus 208 Color printer unit 209 Color scanner unit 210 Operation panel 211 Parallel communication port 212 Interface 213 Modem unit 214 Handset 215 Speaker 216 Melody unit 217 Analog switch 218 Shared register 219 RS232C controller 220 Driver 221 Interface 225 ISDN interface 226 Echo canceller 227 HDLC controller 228 PIAFS controller 229 First port switch 233 Second port switch 237 PHS unit

Claims (4)

A wireless communication device capable of connecting a communication line,
Recording means for recording and outputting data;
Receiving means for wirelessly receiving data from the first information processing apparatus;
Connection means for connecting the second information processing apparatus by wire;
A first CPU that controls wireless communication with the first information processing apparatus; and a first register that is connected to the first CPU via a shared register, and controls the recording means and wired communication with the second information processing apparatus. A second CPU, and when transmitting data via the communication line, receives information designating a counterpart device via the communication line, and from the first information processing apparatus according to the information, the first CPU If the data received wirelessly via the data or the data received via wire from the second information processing device via the second CPU is sent to the counterpart device, and the data is recorded and output by the recording means, the wireless connection The first information processing device according to an instruction of a shared command used in common by the first information processing device and the second information processing device connected by wire From the first information processing apparatus, the recording means records and outputs data received wirelessly via the first CPU from a device or data received via wire from the second information processing apparatus via the second CPU. And a control unit configured to communicate the shared command between the first CPU and the second CPU via the shared register when recording and outputting data received wirelessly . Having reading means for reading an image;
The wireless communication apparatus according to claim 1, wherein the control unit controls the image data read by the reading unit to be transmitted via the communication line. Reading means for reading an image;
Transmission means for wirelessly transmitting the image data read by the reading means to the first information processing apparatus,
2. The wireless communication apparatus according to claim 1, wherein the control unit controls the image data read by the reading unit to be transmitted to the first information processing apparatus by the transmission unit. Reading means for reading an image;
First transmission means for wirelessly transmitting image data read by the reading means to the first information processing apparatus;
Second transmission means for transmitting the image data read by the reading means to the second information processing apparatus via a wire ,
The control unit transmits the image data read by the reading unit via the communication line, transmits the image data to the first information processing apparatus by the first transmission unit, or transmits the second data by the second transmission unit. The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus is controlled to transmit to the information processing apparatus.

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