JP2005333660A - Communication apparatus and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically perform optimum data conversion regardless of the types of a partner terminal and an accommodation terminal by transmitting communication parameter setting information for the communication partner to communicate via wireless according to the communication partner. The purpose is to enable mutual communication.

In a communication device, a determining unit that determines whether or not to communicate with a first communication partner via radio, and the first communication partner via wireless according to the determination by the determining unit. A communication apparatus comprising: transmission means for transmitting communication parameter setting information for communication to the first communication partner.

[Selection] Figure 1

Description

The present invention relates to a communication device and a communication method.

  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 is connected to the terminal adapter with a cable such as RS232C, and data is transmitted in an asynchronous manner from the data terminal to the terminal adapter at a transmission speed of 2400 bps, 4800 bps, 9600 bps, 19.2 kbps, 38.4 kbps, and the like. Send.

  For terminal adapters that have received data, V. The data is converted to a transmission rate of 64 kbps according to 110 or the like and transmitted to ISDN.

  On the other hand, with the spread of PHS, terminals that perform wireless data transmission using PHS are also being put into practical use. When wireless data transmission using PHS is performed, in order to perform retransmission control or the like between terminals (End-to-End), data transmission is performed by configuring a frame of a predetermined format. In Japan, a wireless data transmission protocol is standardized as PIAFS (PHS Internet Access Forum Standard).

  In such a background, it becomes necessary for the data terminal connected to the terminal adapter to perform data communication with the wireless data terminal connected to the PHS, and the wireless data transmission protocol (PIAFS) conversion process is built-in. Terminal adapters have been proposed.

  FIG. 12 is a block diagram of a conventional system, FIG. 13 is a block diagram of an internal configuration of a conventional terminal adapter, FIG. 14 is a block diagram of a radio data terminal, FIG. 15 is a PHS radio frame format, and FIG. 16 is a radio data transmission protocol (PIAFS). The prescribed frame format, FIG. 17 shows a conventional communication sequence diagram, and FIG. 18 shows a conventional operation flowchart.

  In FIG. 12, 101 is an ISDN (Integrated Services Digital Network) which is a digital public communication line, 102 is a terminal adapter on the transmission side, 103 is a data terminal such as a personal computer, 104 is a serial communication interface such as RS232C, and 105 is a PHS base. , 106 is a wireless data terminal having a function of directly accessing the PHS base station, and 107 is a PHS public wireless line having a transmission rate of 32 kbps.

  In FIG. 13, 201 is a CPU, 202 is a memory, 203 is a data bus, 204 is an ISDN interface unit including a DSU (Digital Service Unit), 205 is a B channel serial signal, 206 is an I.D. converter that converts 32 kbps data to 64 kbps. 460 conversion unit, 207 is a wireless data transmission protocol processing unit that performs data conversion processing according to the wireless data transmission protocol (PIAFS), and 208 synchronizes asynchronous serial data (2400 bps, 4800 bps, 9600 bps, 1920 bps) received from the data terminal 103. A PPP asynchronous / synchronous conversion unit 209 that performs processing for conversion into data is an RS232C interface.

  In FIG. 14, 301 is a CPU, 302 is a memory, 303 is a data bus, 304 is a user interface unit including a display unit, a key operation unit, and the like, 305 is a wireless data transmission protocol processing unit, and 306 is a wireless transmission frame (layer 1). A channel codec 307 for assembling / disassembling the device is a high-frequency unit.

  FIG. 15 shows 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 normal. This is a frame such as TCH or FACCH used for data communication.

  FIG. 16 shows a frame format used in the wireless data transmission protocol (PIAFS), where (a) is a negotiation frame, (b) is a synchronization frame, (c) is a control frame, and (d) is a data frame. .

  Next, an operation when the conventional terminal adapter 102 performs data communication with the wireless data terminal 106 will be described.

  First, a process in the case of making a call from the data terminal 103 connected to the terminal adapter 102 will be described.

  The communication application software of the data terminal 103 is activated, and the terminal adapter 102 that has received the call request from the data terminal 103 (S701) transmits a call setting message to the ISDN and performs call processing (S702). At this time, “unrestricted digital” is set as the information transfer capability code of the transmission capability information element included in the call setting message, and “32 kbps + I.460” is set as the user speed code.

  The ISDN receives the call setup message and transmits a call setup message to notify the PHS base station 105 of the incoming call. The PHS base station 105 transmits an incoming call message to the wireless data terminal 106 using PCH (see FIG. 15), and the wireless data terminal 106 that has received the request makes a link channel establishment request on the SCCH. In response to this, the PHS base station 105 transmits a link channel assignment message to the wireless data terminal 106, and the wireless data terminal 106 that has received the link channel assignment by SCCH from the PHS base station 105 transmits an incoming call response message. To do.

  Thereafter, the wireless data terminal 106 exchanges radio management and mobility management related messages with the PHS base station 105, and the wireless data terminal 106 displays that there is an incoming call on the display unit. When the user of the wireless data terminal 106 performs response processing, the wireless data terminal 106 transmits a response message to the PHS base station 105.

  The PHS base station 105 that has received the response message transmits a response message to the ISDN, and the ISDN transmits a response message to the terminal adapter 102. When the terminal adapter 102 receives the response message from the ISDN (S703), the wireless data transmission protocol is negotiated with the wireless data terminal 106. That is, a negotiation frame (S704) and a communication parameter setting request frame shown in FIGS. 16A and 16C are sent (S705), and processing such as frame synchronization establishment and communication parameter setting is performed.

  When these processes are completed and a communication parameter setting acceptance frame is received from the wireless data terminal 106 (S706), a connection notification is sent to the data terminal 103, and thereafter, data sent from the data terminal 103 is sent to ISDN as B channel data. It is transmitted (S713).

  The data transmitted from the data terminal 103 to the terminal adapter 102 as asynchronous data via the RS232C interface 209 is stored in the memory 202 (S715), converted into data by the PPP asynchronous / synchronous conversion unit 208, and then wireless data. The data is input to the transmission protocol processing unit 207 (S716).

  The wireless data transmission protocol processing unit 207 converts the input data into the frame format shown in FIG. 16D (S717), and the converted 32 kbps data is I.D. The speed is converted to 64 kbps by the 460 converter 206 and transmitted from the ISDN B channel (S718).

  The receiving side wireless data terminal 106 receives data via the ISDN 101 and the PHS base station 105. The B channel data sent from the transmission side terminal adapter 102 reaches the PHS base station 105 via the ISDN 101. In the PHS base station 105, the data to be transmitted is data of “unrestricted digital” and “32 kbps + I.460”. 460 reverse conversion is performed, and 64 kbps data received from ISDN is converted to 32 kbps and transmitted to the wireless data terminal 106. Thus, the data transmitted from the data terminal 103 is received by the wireless data terminal 106.

  Conversely, when the wireless data terminal 106 transmits, the data to be transmitted is assembled into the data frame format shown in FIG. 16 (d) and transmitted to the PHS base station 105 at a transmission rate of 32 kbps.

  In the PHS base station 105, the received 32 kbps data is transferred to the I.D. The data is converted into 64 kbps according to the method defined in 460 and transmitted to ISDN 101. Data via the ISDN 101 is received by the terminal adapter 102. In the terminal adapter 102, the I.D. 460 inverse transform The data is converted by the 460 conversion processing unit 210 (S720) and converted to 32 kbps data.

  Further, the wireless data transmission protocol processing unit 207 deletes the header added to the received data (S721) and outputs it to the data terminal 103 (S722).

  Next, a case where the wireless data terminal 106 transmits to the data terminal 103 via the PHS base station 105 will be described.

  When the communication application software of the wireless data terminal 106 is activated and recognizes that a request for data communication has occurred, the wireless data terminal 106 transmits a link channel establishment request for a wireless link to the PHS base station 105 using the SCCH channel.

  When the PHS base station 105 receives the radio link channel establishment request, the PHS base station 105 transmits a link channel assignment message to the radio data terminal 106. Send a configuration message.

  The PHS base station 105 that has received the call setup message sends a call setup confirmation message to the wireless data terminal 106. Receiving the call setting confirmation message, the wireless data terminal 106 exchanges wireless management and mobility management related messages with the PHS base station 105, and then transmits an additional information message. When receiving the additional information message, the PHS base station 105 transmits a call setup message to the ISDN 101 and waits for a response from the ISDN 101.

  On the receiving side, the terminal adapter 102 receives an incoming message from the ISDN 101 (S707) and notifies the data terminal 103 of the incoming call (S708). When response processing is performed in the data terminal 103 (S709), the terminal adapter 102 that has detected the response processing transmits a response message to the ISDN 101 (S710).

  The ISDN 101 that has received the response message from the terminal adapter 102 transmits a response message to the PHS base station 105, and the PHS base station 105 that has received the response message sends a response message to the wireless data terminal 106, so that the data channel is data. Established between the terminal 103 and the wireless data terminal 106.

  After the data channel path is established, the wireless data terminal 106 starts data transmission. Prior to transmission of actual data, negotiation with the terminal adapter 102 is performed according to a wireless data transmission protocol. That is, a predetermined frame in the format shown in FIGS. 16A and 16C is transmitted, frame synchronization is established, communication parameters are set, and communication with the terminal adapter 102 according to the wireless data transmission protocol is performed. Get ready to do it.

  When the terminal adapter 102 receives the negotiation frame and the communication parameter setting request frame (S711), it returns the communication parameter setting acceptance frame (S712), and the data to be transmitted is assembled into the data frame format shown in FIG. 16D (S717). ) And transmitted to the PHS base station 105 at a transmission rate of 32 kbps (S718).

  In the PHS base station 105, the received 32 kbps data is transferred to the I.D. The data is converted into 64 kbps according to the method defined in 460 and transmitted to ISDN 101. Data via the ISDN 101 is received by the terminal adapter 102. In the terminal adapter 102, the I.D. 460 inverse transform The data is converted by the 460 conversion processing unit 206 (S720) and converted to 32 kbps data.

  Further, the wireless data transmission protocol processing unit 207 deletes the header added to the received data (S721) and outputs it to the data terminal 103 (S722). As described above, data transmission from the wireless data terminal 106 to the data terminal 103 is performed.

Patent Document 1 discloses a technique for connecting a PC card to a cordless telephone base unit and supporting wired and wireless networks.
Japanese Patent Application Laid-Open No. 08-056379

  However, since the terminal adapter of the conventional example always communicates with the other party via radio, information for setting communication parameters for radio communication is transmitted to all the other parties. Further, the prior art described in Patent Document 1 does not disclose anything about setting communication parameters with a communication partner.

It is an object of the present invention to perform appropriate parameter setting processing by transmitting communication parameter setting information for a communication partner to communicate via wireless depending on the communication partner.

  According to the present invention, in the communication device, a determination unit that determines whether or not to communicate with the first communication partner via radio, and the first communication partner via the radio according to the determination by the determination unit There is provided a communication apparatus comprising: a transmission unit configured to transmit communication parameter setting information for communication to the first communication partner.

  Further, in the communication device, because the first communication partner communicates wirelessly in accordance with the determination by the determination unit and the determination unit that determines whether or not the first communication partner has a wireless communication function. There is provided a communication device comprising: a transmission means for transmitting the communication parameter setting information to the first communication partner.

  In the communication method, a determination step for determining whether or not to communicate with the first communication partner via radio, and the first communication partner communicates via radio according to the determination in the determination step. And a transmission step of transmitting the communication parameter setting information for the first communication partner.

Further, in the communication method, a determination step of determining whether or not the first communication partner has a wireless communication function, and the first communication partner communicates wirelessly in accordance with the determination in the determination step The communication parameter setting information is transmitted to the first communication partner, and a communication method is provided.

According to the present invention, according to the communication partner, communication parameter setting information for the communication partner to communicate via wireless transmission is transmitted, so that it is possible to perform an appropriate parameter setting process.

  The best mode for carrying out the invention is the following embodiment.

  FIG. 1 is an explanatory diagram showing the system configuration of the first embodiment of the present invention, and FIG. 2 is a block diagram showing the internal configuration of the terminal adapter according to the first embodiment. 3 and 4 are explanatory diagrams showing a communication sequence according to the first embodiment, and FIGS. 6 to 11 are flowcharts showing the operation of the first embodiment.

  In FIG. 1, ISDN (Integrated Services Digital Network) 1101 is a digital public communication line used in the present embodiment, and a terminal adapter 1102 is an example of a communication apparatus implementing the present invention. A data terminal 1103 such as a personal computer and a wireless data terminal 1104 are connected to the terminal adapter 1102.

  Further, the ISDN 1101 is connected to a PHS base station 1105 and a wireless data terminal 1106 having a function of directly accessing the PHS base station 1105 is connected. Further, another terminal adapter 1107 is connected to the ISDN 1101, and a data terminal 1108 is connected to the terminal adapter 1107.

  In FIG. 2, a terminal adapter 1102 includes a CPU 1201 for controlling the entire adapter, a memory 1202 for storing various information, a data bus 1203 for transferring various data, and an ISDN interface unit 1204 including a DSU. , A multiplexer 1206 for exchanging a B channel serial signal 1205 with the ISDN interface unit 1204, and a 32 kbps data assembled by the wireless data transmission protocol processing unit 1209 for converting the data into 64 kbps data. A 460 conversion unit 1207, a PPP asynchronous / synchronous conversion unit 1208 that converts asynchronous serial data (2400 bps, 4800 bps, 9600 bps, 19200 bps) received from the data terminal 103 into 64 kbps synchronous data, and a wireless data transmission protocol (PIAFS). ) A processing unit 1209, a channel codec 1210 for assembling / disassembling a radio transmission frame (layer 1), a high-frequency unit 1211, and an RS232C interface 1212.

  Hereinafter, the operation of the present invention will be described in order.

[1] When making a call from the terminal adapter side in which the present invention is implemented (1-1) When the caller is a data terminal First, processing when making a call from a data terminal connected to the terminal adapter 1102 will be described. In this case, different processing is performed depending on whether the communication partner is a wireless data terminal that supports the wireless data transmission protocol (PIAFS) or a terminal that does not support the wireless data transmission protocol.

  When the communication application software of the data terminal 1103 is activated and the terminal adapter 1102 receives the call request from the data terminal 1103 (S1401), it determines whether the called number is addressed to the wireless data terminal (S1402), and the determination result is Remember. Specifically, if the called number is for a PHS terminal starting with 050 (050-1-123456, etc.), it is determined that the call is for a wireless data terminal (S1601), and the called number starts with another number. If it is a thing (03-123-4567 etc.), it will be considered that it is a terminal which does not support a wireless data transmission protocol (S1501).

  Next, a call setting message is transmitted to the ISDN to perform a calling process (S1503). At this time, “unrestricted digital” is set as the information transfer capability code of the transmission capability information element included in the call setting message, and “32 kbps + I.460” is set as the user speed code.

(When the other party is a data terminal)
When the called number is addressed to the terminal adapter 1107 (03-123-4567), the ISDN 1101 receives the call setting message and transmits the call setting message to the terminal adapter 1107.

  Upon receiving the call setting message, the terminal adapter 1107 sends an incoming call notification to the connected data terminal 1108. When the user of the data terminal 1108 performs response processing, the data terminal 1108 notifies the terminal adapter 1107 of a response, and the terminal adapter 1107 that receives the response notification transmits a response message to the ISDN 1101.

  The ISDN 1101 that has received the response message (S1504) sends a response message to the terminal adapter 1102 on the transmission side, and the terminal adapter 1102 that has received the response message sends a connection notification to the data terminal 1103 (S1505). A message 1103 indicates that data communication can be started. Thereafter, data transmitted from the data terminal 1103 is transmitted to the ISDN as B channel data (S1509).

  Since the communication partner is the data terminal 1108 that does not support the wireless data transmission protocol, the data transmitted from the data terminal 1103 to the terminal adapter 1102 as asynchronous data via the RS232C interface 1212 is stored in the memory 1202 (S1510). (S1511) After data conversion by the PPP asynchronous / synchronous conversion unit 1208 (S1512), the data is transmitted from the ISDN B channel at a transmission rate of 64 kbps (S1516).

  In the terminal adapter 1107 on the receiving side, the received data is converted into asynchronous data by the PPP asynchronous / synchronous conversion unit, and then transmitted to the data terminal 1108.

  Conversely, when data is transmitted from the terminal adapter 1107 on the incoming side, the same procedure is followed (S1513), and the data received inside the terminal adapter 1102 on the outgoing side is converted into asynchronous data (S1514). It transmits to the terminal 1103 (S1515).

  In this way, data can be transmitted and received between the data terminal 1103 and the data terminal 1108.

(When the other party is a wireless data terminal)
When the called party number is addressed to the wireless data terminal 1106 (050-1-123456), the ISDN 1101 receives the call setup message and transmits a call setup message notifying the PHS base station 1105 of the incoming call. The PHS base station 1105 transmits an incoming call message to the wireless data terminal 1106 using PCH, and the wireless data terminal 1106 that receives the PHS base station 1106 makes a link channel establishment request on the SCCH. On the other hand, the PHS base station 1105 transmits a link channel assignment message to the wireless data terminal 1106, and the wireless data terminal 1106 that has received the link channel assignment from the PHS base station 1105 via the SCCH transmits an incoming call response message. To do.

  Thereafter, the wireless data terminal 1106 exchanges wireless management and mobility management related messages with the PHS base station 1105 with the PHS base station 1105, and the wireless data terminal 1106 displays that there is an incoming call on the display unit. When the user of the wireless data terminal 1106 performs response processing, the wireless data terminal 1106 transmits a response message to the PHS base station 1105.

  The PHS base station 1105 that has received the response message transmits a response message to the ISDN 1101, and the ISDN 1101 transmits a response message to the terminal adapter 1102. When the terminal adapter 1102 receives the response message from the ISDN 1101 (S 1604), the wireless adapter 1 negotiates the wireless data transmission protocol with the wireless data terminal 1106.

  That is, the negotiation frame (S1605) and the communication parameter setting request frame shown in FIGS. 16A and 16C are sent (S1606), and processing such as frame synchronization establishment and communication parameter setting is performed. When a communication parameter setting acceptance frame is received from the wireless data terminal 1106 (S1607), a connection notification is sent to the data terminal 1103 (S1608), and data sent from the data terminal 1103 is transmitted to the ISDN 1101 as B channel data thereafter. (S1614).

  Data transmitted from the data terminal 1103 to the terminal adapter 1102 as asynchronous data via the RS232C interface 1212 (S1615) is stored in the memory 1202 (S1616), and is converted by the PPP asynchronous / synchronous conversion unit 1208. (S1617), input to the wireless data transmission protocol processing unit 1209. The wireless data transmission protocol processing unit 1209 converts the input data into the frame format shown in FIG. 16 (d) (S1618). The speed is converted to 64 kbps by the 460 converter 1207 and transmitted from the ISDN B channel (S1619).

  The incoming wireless data terminal 1106 receives data via ISDN and PHS base station. The B channel data sent from the transmission side terminal adapter 1102 reaches the PHS base station via the ISDN. In the PHS base station, the data to be transmitted is “unrestricted digital” and “32 kbps + I.460” data. 460 reverse conversion is performed, and 64 kbps data received from ISDN is converted to 32 kbps and transmitted to the wireless data terminal.

  Conversely, data transmitted from the wireless data terminal 1106 is assembled into a frame according to the wireless data transmission protocol and sent to the PHS base station 1105. In the PHS base station 1105, the received 32 kbps data is transferred to the I.D. After being converted to 64 kbps according to 460, it is transmitted to ISDN 1101.

  In the terminal adapter 1102 that has received the data from the ISDN 1101 (S1620), the I.D. After the conversion to 32 kbps by 460 reverse conversion (S1621), the wireless data transmission protocol processing unit 1209 decomposes the wireless data frame (S1622), and the internal information data is converted into asynchronous data by the PPP asynchronous / synchronous conversion unit 1208. (S1623), and transmits to the data terminal 1103 via the RS232C interface unit 1212 (S1624).

  In this way, data can be transmitted and received between the data terminal 1103 and the wireless data terminal 1106.

(1-2) When the Calling Side is a Wireless Data Terminal Next, the processing when making a call from the wireless data terminal 1104 wirelessly connected to the terminal adapter 1102 (S1403) will be described. Also in this case, different processing is performed depending on whether the communication partner is a wireless data terminal or a terminal that does not support the wireless data transmission protocol (S1404).

  When the communication application software of the wireless data terminal 1104 is activated and recognizes that a request for data communication has occurred, the wireless data terminal 1104 transmits a link channel establishment request for a wireless link to the terminal adapter 1102 using the SCCH channel. When the terminal adapter 1102 receives the wireless link channel establishment request, the terminal adapter 1102 transmits a link channel assignment message to the wireless data terminal 1104, and the wireless data terminal 1104 that received the link channel assignment from the terminal adapter 1102 via the SCCH sends a call setup message. Send.

  Upon receiving the call setting message, the terminal adapter 1102 determines whether the called number is addressed to the wireless data terminal, and stores the determination result. Specifically, if the number is for a PHS terminal starting with 050 (050-1-123456, etc.), it is determined that the call is for a wireless data terminal (S1801), and the number starts with another number. If it is (03-123-4567, etc.), it is regarded as a terminal that does not support the wireless data transmission protocol (S1701).

  Next, the terminal adapter 1102 sends a call setting confirmation message to the wireless data terminal 1104. Receiving the call setting confirmation message, the wireless data terminal 1104 exchanges wireless management and mobility management related messages with the terminal adapter 1102, and then transmits an additional information message (S1703). Upon receiving the additional information message, the terminal adapter 1102 transmits a call setting message to the ISDN 1101 (S1704), and waits for a response from the ISDN 1101 (S1705).

(When the other party is a data terminal)
When the called number is addressed to the terminal adapter 1107 (03-123-4567), the ISDN 1101 receives the call setting message and transmits the call setting message to the terminal adapter 1107.

  Upon receiving the call setting message, the terminal adapter 1107 sends an incoming call notification to the connected data terminal 1108. When the user of the data terminal 1108 performs response processing, the data terminal 1108 notifies the terminal adapter 1107 of a response, and the terminal adapter 1107 that receives the response notification transmits a response message to the ISDN 1101.

  The ISDN 1101 that has received the response message sends a response message to the terminal adapter 1102 on the transmission side, and the terminal adapter 1102 that has received the response message sends a connection notification to the data terminal 1103 (S 1706). Display that data communication can be started. Thereafter, data transmitted from the data terminal 1103 is transmitted to the ISDN 1101 as B channel data.

  Since the communication partner is a data terminal 1108 that does not support the wireless data transmission protocol, the negotiation frame transmitted from the wireless data terminal 1104 is received by the terminal adapter 1102, and between the wireless data terminal 1104 and the terminal adapter 1102, FIG. A predetermined frame having the format shown in (a) and (c) is transmitted to set frame synchronization establishment communication parameters so that communication according to the wireless data transmission protocol can be performed. That is, when a negotiation frame or a communication parameter setting frame is received from the wireless data terminal 1104 (S1708), a communication parameter setting acceptance frame is sent to the wireless data terminal 1104 (S1709).

  Thereafter, data transmission / reception is started between the wireless data terminal 1104 and the data terminal 1108.

  The terminal adapter 1102 that has received the data transmitted by the wireless data terminal 1104 (S1717) stores the data in the memory 1202 after the wireless data transmission processing unit 1209 deletes the wireless data transmission header (S1718). Since the data from which the header has been deleted has an effective transmission rate of about 29.2 kbps, it is necessary to convert the data to 64 kbps for transmission to ISDN. Therefore, a specific pattern (01111110) assigned to the start and end of the upper layer packet is searched from the data stored in the memory, and the start and end of the upper layer packet is detected. The asynchronous / synchronous conversion unit 1208 assembles the HDLC frame format (S1719) and transmits it to the ISDN at a timing of 64 kbps synchronized with the ISDN (S1720).

  In the terminal adapter 1107 on the receiving side, the received data is converted into asynchronous data by the PPP asynchronous / synchronous conversion unit 1208 and then transmitted to the data terminal 1108.

  Conversely, the data transmitted by the data terminal 1108 (S1721) is converted into 64 kbps synchronous data by the PPP asynchronous / synchronous conversion unit 1208 of the terminal adapter 1107, transmitted to the ISDN 1101, and received by the terminal adapter 1102 to the memory 1202. Store (S1722). The terminal adapter 1102 sends data from the memory to the wireless data transmission protocol processing unit 1209 in units of the frame length shown in FIG. 16 (d), adds a predetermined header to convert it to a transmission rate of 32 kbps, and then converts it to the channel codec 1210. The data is input (S 1723) and transmitted to the wireless data terminal 1104 via the wireless unit 1211 (S 1724). The wireless data terminal 1104 that has received the data deletes the header from the 32 kbps data output from the channel codec 306 and sends the data to the upper software.

  In this manner, data can be transmitted / received between the wireless data terminal 1104 and the data terminal 1108.

(When the other party is a wireless data terminal)
When the called party number is addressed to the wireless data terminal 1106 (050-1-123456), the ISDN 1101 receives the call setup message and transmits a call setup message notifying the PHS base station 1105 of the incoming call. The PHS base station 1105 transmits an incoming call message to the wireless data terminal 1106 using PCH, and the wireless data terminal 1106 that receives the PHS base station 1106 makes a link channel establishment request on the SCCH. On the other hand, the PHS base station 1105 transmits a link channel assignment message to the wireless data terminal 1106, and the wireless data terminal 1106 that has received the link channel assignment from the PHS base station 1105 via the SCCH transmits an incoming call response message. To do.

  Thereafter, the wireless data terminal 1106 exchanges wireless management and mobility management related messages with the PHS base station 1105 with the PHS base station 1105, and the wireless data terminal 1106 displays that there is an incoming call on the display unit. When the user of the wireless data terminal 1106 performs response processing, the wireless data terminal 1106 transmits a response message to the PHS base station 1105.

  The PHS base station 1105 that has received the response message transmits a response message to the ISDN 1101, and the ISDN 1101 transmits a response message to the terminal adapter 1102. When the terminal adapter 1102 receives a response message from the ISDN 1101 (S1805), it transmits a response message to the wireless data terminal 1104 (S1806), and the wireless data terminal 1104 that has received the response message displays a connection notification on the display unit. Thereafter, data transmitted from the wireless data terminal 1104 is transmitted to the ISDN 1101 as B channel data (S1810).

  Since the communication partner of the wireless data terminal 1104 is the wireless data terminal 1106 that supports the wireless data transmission protocol, the wireless data transmission protocol is established between the wireless data terminal 1104 and the wireless data terminal 1106 after the data channel path is established. Communication is performed accordingly.

  Prior to transmission of actual data, the wireless data terminal 1104 negotiates with the wireless data terminal 1106 according to a wireless data transmission protocol. That is, a predetermined frame having the format shown in FIGS. 16A and 16C is transmitted, frame synchronization is established, communication parameters are set, and communication with the wireless data terminal 1106 is performed according to the wireless data transmission protocol. To a state where it can be performed.

  Data to be transmitted is assembled into a data frame format shown in FIG. 16D by the wireless data transmission protocol processing unit 305 in the wireless data terminal 1104. Data having a transmission rate of 32 kbps is sent to the terminal adapter 1102 via the channel codec 306 and the wireless unit 307 (S1811). The terminal adapter 1102 converts the data received via the wireless unit 1211 and the channel codec 1211 to I.D. In the 460 conversion unit 1207, the I.D. It is converted into 64 kbps according to the method defined in 460 and transmitted to ISDN (S1812).

  Data via the ISDN is received by the PHS base station 1105. In the PHS base station 1105, I.I. The 64 kbps data received by performing the inverse 460 conversion is converted into 32 kbps data and transmitted to the wireless data terminal 1106.

  Conversely, when the wireless data terminal 1106 transmits data, the PHS base station 1105 that has received the data of 32 kbps assembled in the wireless data transmission frame by the channel codec 306 receives the I.D. It is converted to 64 kbps by 460 and transmitted to ISDN 1101. The terminal adapter 1102 that receives data from the ISDN 1101 (S1814) The inverse conversion of 460 is performed to convert 64 kbps data into 32 kbps data (S1815), and the data is transmitted to the wireless data terminal 1103 via the channel codec 1210 and the wireless unit 1211 (S1816).

  As described above, data transmission / reception is performed between the wireless data terminal 1104 and the wireless data terminal 1106.

[2] When the terminal adapter receives an incoming call (S1405) When the terminal adapter receives an incoming call (S1405), if it recognizes whether the counterpart terminal is a wireless data terminal or a terminal that does not support the wireless data transmission protocol, The process is the same as when sending.

  When receiving an incoming call from ISDN 1101 and receiving a call setup message, terminal adapter 1102 reads the calling party number included in the call setup message. If the calling party number is a PHS subscriber number such as 050-1-123456, it is considered that the other terminal is a wireless data terminal, and the calling party number is 03-123567, a normal telephone subscriber number. If it is, it is considered that the counterpart terminal does not support the wireless data transmission protocol (S1406).

  The terminal adapter 1102 also reads the destination subaddress included in the received call setting message (S1407, S1409), and the incoming call is addressed to the data terminal 1103 or to the wireless data terminal 1104 depending on the destination subaddress. It is determined whether there is (S1408, S1410).

  If the partner terminal is the terminal adapter 1107 and the incoming call is for the data terminal 1103 (S1502), an incoming call notification is sent to the data terminal 1103 via the RS232C interface unit 1212 (S1506). When response processing is performed in the data terminal 1103 (S1507), the terminal adapter 1102 transmits a response message to the ISDN 1101 (S1508), and the ISDN B channel is connected.

  If the partner terminal is the terminal adapter 1107 and the incoming call is for the wireless data terminal 1104 (S1702), processing for calling the wireless data terminal 1104 is performed. Specifically, the terminal adapter 1102 transmits an incoming call message by PCH to the wireless data terminal 1104 (S1710), and the wireless data terminal 1104 that receives the request makes a link channel establishment request on the SCCH. In response to this, the terminal adapter 1102 transmits a link channel assignment message to the wireless data terminal 1104, and the wireless data terminal 1104 that has received the link channel assignment from the terminal adapter 1102 via the SCCH transmits an incoming call response message.

  Thereafter, the wireless data terminal 1104 exchanges wireless management and mobility management related messages with the terminal adapter 1102, and the wireless data terminal 1104 displays that there is an incoming call on the display unit. When the user of the wireless data terminal 1104 performs response processing, the wireless data terminal 1104 transmits a response message to the terminal adapter 1102 (S1711).

  Upon receiving the response message, the terminal adapter 1102 transmits a response message to the ISDN 1101 (S1712), and the B channel is connected.

  Thereafter, in order to establish a link according to the wireless data transmission protocol between the terminal adapter 1102 and the wireless data terminal 1104, the terminal adapter 1102 transmits a negotiation frame (S1713) and a communication parameter setting request frame to the wireless data terminal 1104. (S1714). When a communication parameter setting acceptance frame is received from the wireless data terminal 1104 (S1715), transmission in the data frame is started.

  If the partner terminal is the wireless data terminal 1106 and the incoming call is for the data terminal 1103 (S1602), the terminal adapter 1102 notifies the data terminal 1103 of the incoming call (S1609), and if the data terminal 1103 receives a response (S1610) A response message is transmitted to ISDN 1101 (S1611).

  Thereafter, the terminal adapter 1102 establishes a wireless data transmission protocol link with the counterpart wireless data terminal 1106. When a negotiation frame and a communication parameter setting frame are received from the wireless data terminal 1106 (S1612), a communication parameter setting acceptance frame is transmitted (S1613). Thereafter, data exchange between the data terminal 1103 and the wireless data terminal 1106 is started. (S1614).

  If the partner terminal is the wireless data terminal 1106 and the incoming call is addressed to the wireless data terminal 1104 (S1802), the incoming notification is sent to the wireless data terminal 1104 (S1807), and if there is a response at the wireless data terminal (S1808), the terminal Adapter 1102 responds to ISDN. Thereafter, communication according to the wireless data transmission protocol is started between the wireless data terminal 1104 and the wireless data terminal 1106.

  If the received call setting message does not contain a sub address (S1901, S1902), the data terminal 1103 and the wireless data terminal 1104 are called simultaneously (S1903, S1910). When there is a response at the wireless data terminal 1104 (S1904, S1911), a response message is transmitted to the ISDN (S1905, S1912), and a disconnection notification is sent to the data terminal 1103 (S1906, S1913). The processing shifts to the same processing as in the case of the wireless data terminal 1104 (S1803, S1703).

  When the data terminal 1103 responds (S1907, S1914), after sending a response message to ISDN (S1905, S1912), the wireless data terminal 1104 is notified of disconnection (S1909, S1916), and the subaddress is wireless data. The processing shifts to the same processing as in the case of the terminal 1104 (S1803, S1703).

  As described above, data can be transmitted and received regardless of the type of the terminal connected to the terminal adapter and the type of the counterpart terminal.

  Next, a second embodiment of the present invention will be described.

  In the first embodiment described above, whether or not the counterpart terminal supports the wireless data transmission protocol is determined by the called number at the time of outgoing call and by the received calling number at the time of incoming call. However, in this case, as shown in FIG. 5, even if the other party terminal is a data terminal connected via a wireless data terminal, even if the subscriber number itself is a non-wireless number, the terminal itself is wireless. May support data transmission protocols.

  In such a case, it is possible to use a method in which a table describing whether to support the wireless data transmission protocol is provided in the terminal adapter for each subscriber number and subaddress of the communication partner. This table is created by a connected data terminal or wireless data terminal.

  When making a call, the terminal adapter that receives the subscriber number and subaddress of the call destination searches the table, and after connecting the B channel, depending on whether the other party is a data terminal or a wireless data terminal. Select the data conversion method.

  Also, when an incoming call is received, the terminal adapter that has received the partner's subscriber number and subaddress searches the table and selects the data conversion method after the B channel connection according to the result.

  By doing so, it is possible to reliably recognize whether the counterpart terminal supports the wireless data transmission protocol and enable data communication with an arbitrary counterpart.

  In each of the embodiments described above, when the terminal adapter is connected to the data terminal by wire, the RS232C interface is used. However, the same effect can be obtained by other interfaces, and for example, a USB (Universal Serial Bus) or the like may be used.

  As described above, according to the above description, data transmission to an arbitrary terminal can be enabled regardless of whether the other party supports the wireless data transmission protocol.

  When receiving a call, data can be received from an arbitrary terminal regardless of whether the other party supports the wireless data transmission protocol.

  Furthermore, communication parameter setting information for the communication partner to communicate via radio is transmitted according to whether or not the communication partner communicates via radio or whether the communication partner has a radio communication function. Parameter setting processing suitable for the communication partner can be performed.

Further, when the communication partner does not perform wireless communication, parameter setting information for wireless communication is not transmitted, so that useless processing can be prevented. Further, since the communication parameter setting information is transmitted depending on whether or not the calling side performs wireless communication and whether or not the called side performs wireless communication, it is possible to perform appropriate parameter setting according to the communicating device.

It is explanatory drawing which shows the system configuration | structure in 1st Example. It is a block diagram which shows the internal structure of the terminal adapter by the said 1st Example. It is explanatory drawing which shows the communication sequence by the said 1st Example. It is explanatory drawing which shows the communication sequence by the said 1st Example. It is explanatory drawing which shows the communication sequence by 2nd Example of this invention. It is a flowchart which shows operation | movement of the said 1st Example. It is a flowchart which shows operation | movement of the said 1st Example. It is a flowchart which shows operation | movement of the said 1st Example. It is a flowchart which shows operation | movement of the said 1st Example. It is a flowchart which shows operation | movement of the said 1st Example. It is a flowchart which shows operation | movement of the said 1st Example. It is explanatory drawing which shows the conventional system structure. It is a block diagram which shows the internal structure of the conventional terminal adapter. It is a block diagram which shows the internal structure of the conventional radio | wireless data terminal. It is explanatory drawing which shows a PHS radio frame format. It is explanatory drawing which shows the frame format prescribed | regulated by a radio | wireless data transmission protocol (PIAFS). It is explanatory drawing which shows the conventional communication sequence. It is a flowchart which shows the conventional communication operation.

Explanation of symbols

1101 ... ISDN,
1102, 1107 ... terminal adapter,
1103, 1108 ... data terminal,
1104, 1106 ... wireless data terminal,
1105 PHS base station.

Claims (10)

In communication equipment,
Determining means for determining whether to communicate with the first communication partner via radio;
A transmission means for transmitting communication parameter setting information for the first communication partner to communicate with the first communication partner in response to the determination by the determination means;
A communication apparatus comprising: In claim 1,
The communication device is a relay device used when a second communication partner and the first communication partner communicate with each other. In claim 1 or claim 2,
The communication device is characterized in that the transmission means is means for transmitting communication parameter setting information when the second communication partner communicates with the first communication partner. In any one of Claims 1-3,
The communication device is a device for transmitting communication parameter setting information when the communication device and the first communication partner communicate with each other. In claim 1,
The communication device is a device that communicates with the first communication partner via a relay device. In claim 1,
The communication device is a device that communicates with a third communication partner via the first communication partner. In any one of Claims 1-6,
The communication apparatus according to claim 1, wherein the determination means is means for performing the determination based on identification information of the first communication partner. In communication equipment,
Determining means for determining whether or not the first communication partner has a wireless communication function;
A transmission means for transmitting communication parameter setting information for the first communication partner to communicate with the first communication partner in response to the determination by the determination means;
A communication apparatus comprising: In the communication method,
A determination step of determining whether to communicate with the first communication partner via radio;
A transmission step of transmitting communication parameter setting information for the first communication partner to communicate with the first communication partner in response to the determination in the determination step;
A communication method characterized by comprising: In the communication method,
A determination step of determining whether or not the first communication partner has a wireless communication function;
A transmission step of transmitting communication parameter setting information for allowing the first communication partner to communicate via radio according to the determination in the determination step;
A communication method characterized by comprising:

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