JP2000069110A - Automatic protocol activation method in data communication and terminal equipment provided with data communication function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic protocol activation method in data communication and terminal equipment provided with a data communication function allowing an incoming call terminal to automatically activate a protocol corresponding to an opposite side protocol and respond in the case of a call for the purpose of data communication. SOLUTION: When an incoming call by the data communication is present, a reception side terminal takes out the contents (protocol identification code) of the termination sub address of a CC call setting message (T1), checks whether or not a mounted protocol and the protocol identification code correspond (T2), and if they correspond, activates the corresponding mounted protocol (T3) and responds to the incoming call by the data communication (T4). Also, when the protocol identification code does not correspond to the mounted protocol, the call is released (T5). Also, in the case the incoming call is by voice communication, responding to the incoming call of the voice communication is performed (T6).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a second generation cordless telephone system (so-called PHS (Personal Handy-Pho
ne System)) communication terminal device (hereinafter PH
P terminal equipped with data communication function
The present invention relates to a technology for determining a protocol for data communication of a terminal or the like.

[0002]

2. Description of the Related Art Conventionally, a PHS terminal equipped with a data communication function is equipped with only one data communication service protocol (for example, only a mail transmission communication protocol) and receives a data communication call. Is a type that activates unconditionally implemented protocols, and PHS terminals use multiple data communication service protocols (for example, communication protocols provided for each data communication service (application) such as mail transmission and image transmission). ) Is implemented, but the type in which the user sets the data communication service protocol to be used by the user, the PHS terminal implements a plurality of communication protocols,
After connection of a call, there is a type in which a negotiation as to which data communication service protocol to use is made after exchanging data with a partner terminal.

[0003]

FIG. 5 is an explanatory diagram of a protocol stack of the PHS standard (RCR STD-28). The protocol stack 50 includes layers 41 (layer 1 (physical layer)) to 43 (layer 3). ) And its upper layer 54, each of which is standardized by RCR STD-28. The upper layer 54 includes a voice communication protocol 54-1 and a data communication protocol (PIAFS) 5
4-2, each of which is standardized. The data communication protocol (PIAFS) is ISDN (Integrat
ed Services Dgital Nsteork).

Some PHS terminals have a data communication function based on the above standard. In such terminals, PHS terminals or PHS terminals and IS
After establishing a data communication protocol with a terminal connected to the DN, data transmission and reception can be performed.

However, a conventional P with a data communication function
In the HS terminal, as shown in the illustration of the protocol stack in FIG. 5, data communication or voice communication (voice 54-1 in FIG. 5) is performed.
Or PIAFS54-2) can be specified, but PIAFS
Judgment of the type of the protocol for the data communication service of the higher rank 54-2 (in the example of FIG. 5, protocol A or protocol B)
Can not be determined). That is, at the time of an incoming call, only the fact that the call requires data communication can be specified, so that the transmitting terminal and the receiving terminal know what kind of service (application) data communication the partner wants to perform. It is necessary to start a protocol for the service and transmit and receive data.

However, the PHS terminal of the above type has only one type of application communication protocol, so that a call can be established if the communication protocol is the same as that of the terminal on the other hand, but a call can be established if the communication protocol is different. There is a disadvantage that it cannot be done.

[0007] Further, in the above-mentioned type of PHS terminal, a plurality of data communication service protocols are implemented. However, if the data communication service protocol differs from the data communication service protocol set in the transmitting terminal and the receiving terminal, the sender receives the data. When it is necessary to adjust the protocol with the receiver and the receiver and the communicator cannot adjust the protocol (for example, when there is no person on the receiving terminal side), the sender transmits data when it wants to transmit. There is a problem that such a function cannot be realized.

In the above-mentioned type of PHS terminal, when a data communication service protocol is negotiated after connection, all data communication systems corresponding to the installed data communication service protocol have a negotiation function. There was a problem that it was necessary to be. Further, in this method, even if a protocol is not supported by the terminal, a negotiation operation is performed once, so that a call is established and a bill is charged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks and problems of a PHS terminal device having a data communication function. It is an object of the present invention to provide a protocol automatic activation method at the time of data communication that enables a corresponding protocol to be automatically activated and responded, and a terminal device provided with a data communication function.

[0010]

According to a first aspect of the present invention, there is provided a method for automatically activating a protocol at the time of data communication, comprising the steps of: Comparing the protocol identification information set in the above with the identification information of each of a plurality of protocols included in the receiving terminal, and when the two match, the receiving terminal activates the protocol with the matching identification information. And

According to a second aspect of the present invention, in the method for automatically starting a protocol at the time of data communication, the connection message is
This is a call setup message, and the specific field is a destination subaddress of the CC call setup message.

According to a third aspect of the present invention, in the method for automatically activating a protocol at the time of data communication according to the first or second aspect, the transmitting terminal and the receiving terminal include any of the following. a: PHS terminal for both transmitting and receiving sides, b: ISDN terminal for both transmitting and receiving sides, c: PHS terminal for transmitting side, ISDN terminal for receiving side, d: ISDN terminal for transmitting side, PHS terminal for receiving side.

A terminal device according to a fourth aspect of the present invention determines a protocol used in data communication at the time of outgoing call, and writes protocol identification information into a specific field of the connection message. Comparing means for comparing the protocol identification information written in the specific field with the identification information of each of the plurality of protocols provided in the terminal device, and protocol activation means for activating the protocol based on the comparison result. Having.

According to a fifth aspect, in the terminal device according to the fourth aspect, the protocol is a protocol for a data communication service, the connection message is a CC call setup message, and the specific field is a destination of the CC call setup message. It is a sub address.

[0015]

FIG. 1 is a block diagram showing a configuration of an embodiment of a terminal according to the present invention. A PHS terminal 100 includes a transmitting / receiving antenna 1, a radio circuit 2, a modem circuit 3, a control circuit 4, a ROM 5, and It has a RAM 6. FIG.
Symbols 100 'and symbols 1' to 6 'are used to describe the operation of the receiving-side PHS terminal.

At the time of reception, the radio wave received by the antenna 1 is used to extract an AC signal of a predetermined frequency by the radio circuit 2,
The digital signal is demodulated by the modem circuit 3 and taken out. The output of the modem circuit 3 is processed by the control circuit 4 to perform an incoming call determination, a communication method (determination between voice communication and digital communication), and a data communication service protocol determination operation (described later) according to the present invention. When a call is established, a reception process is performed.

At the time of originating a call, the control circuit 4 performs a calling process for the receiving terminal. In this case, the call identification is performed by inserting the protocol identification information (code) for the data communication service according to the present invention into the CC call setting message. (Described later). The transmission data (including the CC call setup message) generated by the control circuit 4 is modulated by the modem circuit 3 to be an AC signal, and is emitted as a signal of a specific frequency by the radio circuit 2 to the antenna along with a carrier via an antenna. .

The control circuit 4 controls the operation of the entire PHS terminal from a processor such as a CPU according to a control program stored in the ROM 5. The control circuit 4
Performs a communication control operation by a communication control program group stored in the ROM 5 in the same manner. As a part of the communication control program group stored in the ROM 5, means (protocol information setting program and protocol start-up program (described later)) for performing a process of determining a protocol for a data communication service of the present invention, A protocol processing program for processing data communication protocols,
A PHS protocol processing program for processing a communication protocol based on the PHS standard (RCR STD-28) is included.

Similarly, the control circuit 4 performs a communication service processing operation (for example, a voice communication operation, a data communication operation, and the like) according to a communication service program group (application program) stored in the ROM 5.

The ROM 5 stores a correspondence list (protocol correspondence list 20 (FIG. 2)) for associating a data communication service with a protocol, in addition to a control program, a communication control program, each service processing program, and the like. Note that a removable memory such as a flash memory is used instead of the ROM 5 to use
0 may be stored to enable addition or deletion of a data communication service code or a protocol code registered in the protocol correspondence list of FIG.

The RAM 6 is used as a working memory,
It is used as a storage area during program execution, and as a temporary storage area for various data, variables, and intermediate processing results.

Although FIG. 1 shows an example of a PHS terminal as a wireless terminal, the present invention is not limited to a PHS terminal and is not limited to a PHS terminal.
The present invention is also applicable to a terminal connected to a DN. in this case,
The terminal is provided with the modem circuit 3, control circuit 4, ROM 5 and RAM 6 of FIG. 1 as a basic configuration. In this embodiment, the data communication control and the like by the control circuit 4 are performed by a group of communication control programs stored in the ROM 5. However, the present invention is not limited to this. ).

<Method of Determining Protocol for Data Communication Service> In the present invention, an originating terminal transmits identification information for identifying a protocol for a data communication service in a destination subaddress of a CC call setup message, and a destination terminal receives a call. Sometimes, the protocol identification information contained in the destination subaddress of the CC call setup message is taken out, and if there is a corresponding protocol, the protocol is activated, and if not, the call is released.

That is, the PHS terminal 100 determines the protocol for the data communication service at the time of outgoing call, inserts the protocol identification information into the destination subaddress of the CC call setup message (or the protocol information setting circuit), and Examine the contents of the destination subaddress of the received CC call setup message, and if it is the protocol identification information, determine whether it corresponds (matches) with the identification information of the data communication service protocol implemented by the PHS terminal, A protocol start-up program (or protocol start-up circuit) for starting the data communication service protocol when they correspond (match).

Here, the CC call setup message is a message for starting a call setup defined by the PHS standard (RCR STD-28), and is called by a PHS processing program (or PHS processing circuit) at the time of calling. You. In addition, the CC call setup message includes various information related to call setup (called number, called sub address, transmission capability, etc.). The destination subaddress is one of the information elements included in the CC call setup message, and is an information element field for identifying the subaddress of the receiving side. In this embodiment, this information element field is used for the data communication service. Used as a protocol identification information setting field for specifying a protocol.

In this embodiment, the protocol identification information is written in the destination subaddress of the CC call setup message. However, the present invention is not limited to this. It may be written to a specific address.

[Protocol Correspondence List] As an embodiment of the associating means for associating the data communication service protocol with the data communication service (application program for performing the data communication service), each terminal is configured as shown in FIG.
Is stored in the ROM 5 (or flash memory). In FIG. 2, the protocol correspondence list 20 is communication service identification information (code).
, A protocol code column 22 for registering data communication service protocol identification information (code), an address column 23 for registering a storage location of a data communication service protocol program, and a data communication service protocol. It has a size column 24 for registering the size (capacity) of the program (in FIG. 2, symbols 20 'to 24' are used to describe a protocol correspondence list on the receiving terminal side).

The identification information (communication service code) of the communication service to be registered in the communication service code column 21 is, for example, the program identification of each communication service program (data communication service program) stored in the ROM 5 (or flash memory). An ID may be used. Each data communication service and one for data communication service
One-to-one or many-to-one (corresponding to the case where one protocol corresponds to several data communication services). For example, in FIG. 2, the protocol with the code “01” corresponds to only the data communication service 1, but the code “02”
Corresponds to a plurality of data communication services 2, 3, and 4.

FIG. 3 is a flow chart showing one embodiment of the operation of the control circuit 4 at the time of transmission, wherein the control circuit 4 comprises a protocol information setting program (or a protocol information setting circuit). , The protocol identification information is set in the following procedure (steps S1 to S3), and the protocol information is notified to the receiving side by the PHS protocol processing program (or PHS protocol processing circuit) (step S4).

Step S1: (Activation of Data Communication Service) When the user operates the PHS terminal 100 to activate the data communication service, the data communication service program is called from the ROM 5 and stored in the RAM 6. At this time, the control circuit 4 stores the ID of the program in the RAM 6.

Step S2: (Determination of Protocol) The control circuit 4 searches the protocol correspondence list 20 and compares the contents of the communication service code column 21 of the protocol correspondence list 20 with the program ID stored in the RAM 6, and the communication service code column 21 and the program ID stored in the RAM 6, the protocol code field 22
(In the example of FIG. 3, the protocol code “01” of the protocol A is extracted).

Step S3: (Writing of Protocol Code to Destination Sub Address) When the protocol code corresponding to the communication service started in step S2 is extracted, the control circuit 4
Write the protocol code in the destination subaddress field of the call setup message.

Step S4: (Call) After writing the protocol code in the destination sub-address field in step S3, the control circuit 4 copies the control to a PHS protocol processing program and transmits a CC call setup message (call). Perform

By the above operation, the PHS terminal 100 can notify the other terminal at the time of an incoming call that the call is intended for a data communication service according to a specific protocol. FIG. 4 is a flowchart showing an embodiment of the operation of the control circuit 4 'of the receiving-side PHS terminal 100' at the time of an incoming call.
The control circuit 4 'of the receiving side terminal starts the operation of the data communication service protocol in the following procedure (steps T2 and T3) by the protocol start program (or the protocol start circuit).

Step T1: (Determination as to whether incoming call is made by data communication) The control circuit 4 'of the receiving side PHS terminal 100' determines whether the incoming call is an incoming call by data communication or an incoming call by voice communication according to a PHS protocol processing program. Is determined. And
In the case of data communication, the contents of the destination subaddress of the CC call setup message are extracted, and the process transits to T2. In the case of voice communication, the process transits to T6.

Step T2: (Comparison with Protocol Installed on Receiving Side) When the incoming call is made by data communication, the control circuit 4 'executes the protocol call program to extract the contents of the CC call setting message extracted in step S1. That is, the protocol identification information (the code “01” of the protocol A in the example of FIG. 4)
The protocol correspondence list 20 ′ is searched based on the search result and compared with the contents of the protocol column 22 ′ of the protocol correspondence list 20 ′, and when they match, it is determined that the receiving terminal 100 ′ implements the protocol. (In the example of FIG. 4, the code “01” matches), and when they do not match, it is determined that the receiving terminal 100 ′ does not support the protocol, and the process proceeds to T5.

Step T3: (Activation of Protocol for Data Communication Service) If the protocol notified from the transmitting terminal in step S2 is a protocol implemented on the receiving side, the protocol is activated and the procedure goes to T4. Transition. That is, the control circuit 4 'takes out the address where the data communication service protocol of the protocol code is stored and its size from the address column 23' and the size column 24 'of the protocol correspondence list 20' and stores them in the RAM 6, and performs control. The process proceeds to that protocol (protocol A is activated in the example of FIG. 4) and transits to T4.

Step T4: (Response to an incoming call by data communication) When the protocol notified from the transmitting terminal is started in step T3, the control circuit 4 'executes the data communication by the PHS protocol processing program. In response to the incoming call, the process at the time of the incoming call ends.

Step T5: (Release of Call) When the protocol notified from the transmitting terminal in step T2 is not implemented in the receiving terminal, the control circuit 4 'releases the call by the PHS protocol processing program. Then, the process at the time of receiving the call ends.

Step T6: (Response to an incoming call by voice communication) In step T1, if there is an incoming call by voice communication from the transmitting terminal, the control circuit 4 'receives the incoming call by the PHS protocol processing program. In response to the call, the process at the time of receiving the call ends.

According to the above operation, the receiving terminal can automatically start the data communication service protocol corresponding to the protocol notified from the transmitting terminal. If the transmitting side protocol is not a data communication protocol in step T5, the call is released (the call is not established), so that no charge is made. In addition, instead of writing the protocol identification information to the destination subaddress of the CC call setup message, when the protocol identification information is written to a specific address such as an unused address or an empty area in the call setup message, In step (T1), the protocol identification information is extracted from a specific address in the call setup message. Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be applied to digital networks (wired) such as ISDN and various wireless digital networks. Needless to say.

[0042]

As described above, according to the present invention, a protocol for a data communication service can be specified before a call is connected, and even a PHS terminal or an ISDN terminal supporting a plurality of data communication service protocols can automatically specify a protocol. Incoming calls can be made. In addition, since a target data communication service protocol can be started before the call connection is completed, and the reception of the first message can be waited, the negotiation process can be simplified as compared with the related art. Also, if the protocol on the transmitting side is a data communication protocol that is not implemented, the call is not established, so that there is no charge.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an embodiment of a PHS terminal.

FIG. 2 is a structural diagram of a protocol correspondence list as an embodiment of a correspondence unit for associating a protocol with a data communication service.

FIG. 3 is a flowchart showing one embodiment of the operation of the control circuit at the time of transmission.

FIG. 4 is a flowchart showing one embodiment of the operation of the control circuit at the time of transmission.

FIG. 5 shows a second generation cordless telephone system standard (R
It is an explanatory view of a protocol stack of CR STD-28).

[Explanation of symbols]

 20, 20 'protocol correspondence list (comparing means) 100, 100' PHS terminal (terminal device)

Continuation of front page (72) Inventor Hiroshi Oishi 3-5-1 Toranomon, Minato-ku, Tokyo DDI Tokyo Pocket Telephone Co., Ltd. F-term (reference) 5K030 GA04 GA17 GA20 HB18 HC04 JA01 JA05 JT01 5K034 AA10 AA17 BB06 CC01 CC05 CC06 DD01 EE13 FF13 HH01 HH02 HH12 HH14 HH63 JJ24 KK02 MM39 5K067 AA14 AA29 BB04 DD11 DD13 DD17 DD51 EE02 FF02 GG11 HH22 HH23 KK15

Claims (5)

[Claims] When a call is received by data communication, protocol identification information set in a specific field of a connection message sent from a transmitting terminal is compared with respective identification information of a plurality of protocols provided in a receiving terminal. A method of automatically activating a protocol at the time of data communication, characterized in that, when the IDs match, the receiving terminal activates the protocol whose identification information matches. 2. The method according to claim 1, wherein the connection message is a CC call setup message, and the specific field is a destination subaddress of the CC call setup message. 3. The transmitting terminal and the receiving terminal comprise one of the following:
Protocol automatic start method at the time of data communication described. a: PHS terminal for both transmitting and receiving sides, b: ISDN terminal for both transmitting and receiving sides, c: PHS terminal for transmitting side, ISDN terminal for receiving side, d: ISDN terminal for transmitting side, PHS terminal for receiving side. 4. A protocol information setting means for judging a protocol used in data communication at the time of outgoing call, and writing the protocol identification information in a specific field of a connection message, and writing the protocol identification information in a specific field of the connection message received at the time of incoming call. Comparing means for comparing the protocol identification information with the identification information of each of a plurality of protocols provided in the terminal device, and protocol activation means for activating the protocol based on the comparison result. Terminal device with data communication function. 5. The method according to claim 4, wherein the protocol is a data communication service protocol, the connection message is a CC call setup message, and the specific field is a destination subaddress of the CC call setup message. Terminal device with data communication function.