JPS5854700B2 - Protocol identification method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protocol identification method in communication between terminals accommodated in a data exchange network or between a terminal and the network.

When communicating between terminals using a data exchange network, communication is performed according to communication rules or protocols that define the communication speed, code, control procedure, etc. of the network, the terminal, and between the terminals.

Therefore, the network needs to recognize the protocol of the terminal, and the terminal also needs to recognize the protocol of the terminal and network with which it communicates.

Generally, a protocol is recognized using a protocol identification code (hereinafter abbreviated as PID), and the network
The following two methods are known as means for recognizing an ID.

(1) The terminal registers its PID in the network in advance, and the network reads the registration information and recognizes the PID when the terminal makes and receives calls.

(2) Without registering the PID with the network, the terminal notifies the network of its own PID when making a call, and when receiving a call, the PID is notified from the network.

As shown in FIG. 1, terminals C1 and C2 are connected to data exchange network N
If the terminal C1 makes a call, the data exchange network N recognizes it as a PC based on the registration information or the PID from the terminal C1.

At this point, the data exchange network N does not recognize the PID of the terminating terminal C2, but if the data exchange network N does not have a communication function between terminals with different PIDs, the terminating terminal must also have the same PID. Therefore, the data exchange network N notifies the receiving terminal C2 of the PC.

The receiving terminal C2 receives this PC and checks it with its own terminal IID,
If they match, an acceptance notification will be sent back to the data exchange network N, and communication will then take place; however, if they do not match, communication cannot be performed and is disconnected.

Therefore, in the conventional system, if the data exchange network N makes a mistake in the PID notified to the receiving terminal C2, it becomes impossible to communicate even if the terminal is originally capable of communication.

Furthermore, even if the data exchange network N has a function that enables communication between terminals using different protocols, the PI of the receiving terminal
D cannot be recognized, so if the PID notified to the receiving terminal is different from the receiving terminal PID, there is a drawback that communication cannot be performed.

The present invention eliminates the above-mentioned conventional drawbacks, and its purpose is to ensure that the PID notified to the receiving terminal is
If it is different from the ID, the terminal PID is notified to the network so that communication can be performed even if the PID from the network is incorrect. Also, if the terminal includes a terminal that does not have a function to notify the terminal PID, This is a method for notifying the PID of a terminal from the network, and enables communication even when the PIDs of the network and the terminal are different.

Examples will be described in detail below.

In FIG. 2, when the originating terminal A and the terminating terminal A2゜B2 are accommodated in the data exchange network N, the terminating terminal A2
．． B2 is provided with a function to notify the network of its own terminal PID, and terminal A1. Let the PID of A2 be PA1 and the PID of terminal B2 be PB.

In order to perform communication from the originating terminal A1 to the terminating terminal A2, the data exchange network N notifies the terminating terminal A2 of PA as the PID upon the transmission of the originating terminal A1.

The receiving terminal A2 compares the notified PID with its own terminal PID.

In this case, since the PID of the fallen terminal is PA, a match is obtained, and the receiving terminal A2 returns an acceptance notification to the data exchange network N, and communication is then performed.

If the PID notified to the terminating terminal A2 is incorrect, the terminating terminal A2 compares the notified PID with its own terminal PID and the terminal PID does not match, so the terminating terminal A2 responds by notifying the data exchange network N of its own terminal PID.

Therefore, even if the data exchange network N mistakenly reports the PA of the PDI of the originating terminal A1 as PIA to the terminating terminal A2, or if the PA becomes PIA due to a transmission error, the terminating terminal A2 notifies the PA as its own terminal PID. By responding,
Communication can now be performed between the originating terminal A1 and the receiving terminal A2.

Furthermore, since the originating terminal A1 and the receiving terminal B2 have different PIDs, if the data exchange network N has a protocol conversion function, the terminal can communicate without being aware of the protocol of the other terminal.

In this case, the data exchange network N needs to know the PIDs of both terminals, and the means described below is adopted.

When the originating terminal A1 makes a call, the data exchange network N uses the registration information or notification from the originating terminal A1 to determine the PI of the originating terminal A1.
D's PA can be recognized, and then the calling terminal A1 is sent to the receiving terminal B2.
Notify the PA of the PID.

The receiving terminal B2 compares the notified PA with the PB of its own terminal PID, and since there is a discrepancy, the P of its own terminal PID is
B is sent back to the switching network N.

As a result, the data exchange network N can recognize the PID of the receiving terminal B2, and can perform communication between the terminals using the protocol conversion function.

Further, as shown in FIG. 3, if the PID notified from the data exchange network N is different from the terminal PID, the own terminal P
Terminal C2 that does not have the function of notifying the data exchange network of its ID
Terminal A1. described with reference to FIG. A2. If the terminal C2 is accommodated in the data exchange network N together with B2, then this terminal C2
Terminal C2 will not be able to receive an incoming call from a terminal with a PID different from the PID of terminal C2.

However, in the present invention, communication is made possible by notifying the receiving terminal from the data exchange network N of the PC of the PID of the terminal C2.

That is, when the originating terminal A1 makes a call, the data exchange network N grasps the PID of the originating terminal A1 in the same way as in the above embodiment, and then determines the PID of the terminating terminal, regardless of the type of protocol of the originating terminal. First, Pc of the PID of terminal C2 is notified to the receiving terminal regardless of the type of the receiving terminal.

The receiving terminal C2 receives the PI notified from the data exchange network N.
Communication with the originating terminal A1 is performed using the protocol conversion function of the data exchange network N by sending an acceptance notification back to the data exchange network N based on a match between the PC of D and the PC of the own terminal PID. become.

When communicating from the originating terminal A1 to the terminating terminal A2 or B2, the terminating terminal is notified of the PID PC from the data exchange network N, and the terminating terminal A2. In B2, as a result of checking the own terminal PID with PA or PB, there is a mismatch, so the own terminal PID
sends a response to notify the data exchange network N of the PA or PB.

This allows the data exchange network N to know the PID of the receiving terminal, so whether the PID is the same or a different PID,
Communication will take place between terminals.

As explained above, according to the present invention, even if the PID notified by the network to the receiving terminal is incorrect, communication between terminals using different protocols is possible, and the PID of the terminal is transmitted to the network. Even if a network accommodates only one type of terminals that do not have a notification function, there is an advantage that communication between terminals using different protocols is possible.

[Brief explanation of the drawing]

Figure 1 is an explanatory block diagram of a conventional example, Figures 2 and 3.
The figure is a detailed explanatory block diagram of the present invention. N is a data exchange network, A1. A2. B2. C2 is a terminal.

Claims (1)

[Scope of Claims] 1. In a data exchange network in which communication is performed by recognizing a protocol that determines the communication speed, code, control procedure, etc. between terminals or between a terminal and a network using a protocol identification code, incoming calls to a terminal At the time, the protocol identification code of the network terminal notified from the network or the originating terminal to the terminating terminal via the network is compared with the terminating terminal protocol identification code at the terminating terminal, and if there is a match, the response signal is sent to the A protocol identification method characterized in that a response is sent to a network or a calling terminal with a reception communication, and if a match does not match, the receiving terminal protocol identification code is notified to the network or a calling terminal in a response signal. 2. In a data exchange network that performs communication by recognizing the protocol that determines the communication speed, code, control procedure, etc. between terminals or between a terminal and the network using a protocol identification code, when a call is received at the terminal, the receiving terminal is notified. The network accommodates a terminal having a procedure for disconnecting when the received protocol identification code does not match the called terminal protocol identification code, and a terminal having a procedure for notifying the called terminal protocol identification code to the network or the calling terminal. Alternatively, the originating terminal notifies the terminating terminal of the protocol identification code of the terminal that has the disconnection procedure, and the terminating terminal other than the terminal that has the disconnection procedure transmits the notified protocol identification code and the protocol identification of the terminating terminal. The code is checked at the receiving terminal, and if there is a match, a response is sent to the network or the calling terminal with an acceptance notification, and if the matching does not match, the receiving terminal protocol identification code is notified to the network or the calling terminal with a response signal. A protocol identification method characterized by: