JP3370943B2 - Communication terminal connection method, and storage medium storing program for causing the connection method to function - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a multimedia communication terminal using a packet network and a storage medium having a program for operating the connecting method recorded therein. Three
23 terminals are PHS (RCRSTD28 standard), PDC,
The present invention relates to a connection method when making a dial-up connection using a mobile communication network such as IMT-2000.

[0002]

2. Description of the Related Art FIG. 7 is a diagram showing a connection procedure when an ITU-T recommended H.323 terminal makes a dial-up connection using PHS (RCRSTD28 standard). Here, the ITU-T recommendation H.323 is a standard for performing multimedia communication on a packet network, and a terminal compliant with the ITU-T recommendation H.323 is a voice, It means a terminal that can perform real-time communication using multimedia information such as images. Hereinafter, the "terminal conforming to ITU-T recommendation H.323" will be abbreviated as "H.323 terminal".

Generally, when H.323 terminals make a dial-up connection by using PHS, 7 shown in FIG.
Negotiation is performed between the terminals for each of the stacks 1 to 77, and the connection between the H.323 terminals is established. Therefore, it is necessary to send and receive many messages between terminals before the connection is terminated, and there is a disadvantage that many procedures are required until the connection is terminated.

However, if it is premised that the H.323 terminals connect to each other, the protocol used in each stack is inevitably determined, and therefore it is not necessary to negotiate the connection for each stack. It is more efficient for a certain stack to collectively transmit information necessary for connection processing of the stack subsequent to the stack and to connect the subsequent stack according to the information.

As a method for solving this problem, ITU
-T Recommendation H.323 Version 2 Section 8.1.7 proposes a fast connect procedure. This technique
When the H.323 terminals are connected to each other, the information necessary for the capability exchange of the H.323 terminals (stack 75) and the process of creating a socket for image / voice communication (stack 76) is provided.
The call connection processing (stack 74) of the H.323 terminal collectively transmits the data, sets capability information according to the information, and performs socket connection for image / voice communication, thereby reducing the number of negotiations performed at the time of connection and connecting time. Is to shorten the

[0006]

However, the procedure described above is performed according to H.3 after the establishment of the communication means between the terminals is completed.
23 is a connection procedure when the applications are connected to each other. Therefore, when performing a dial-up connection using PHS or the like, the above procedure cannot be used until the establishment of the communication line is completed.

The present invention is intended to reduce the time required for connection by transmitting all the information necessary for the subsequent negotiations by using a call control message immediately after the connection of the PHS line. is there.

[0008]

According to a first aspect of the present invention, there is provided a data communication section for transmitting / receiving data, a communication control section for controlling the data communication section, and an image code for encoding / decoding image data. In a method of connecting a communication terminal using a packet network, which includes a decoding / decoding section and a speech coding / decoding section for coding / decoding voice data, when connecting to a partner terminal using a communication line. , PPP (Point to P
LCP (Link Cont) required for oint Protocol connection processing
rol Protocol) information, NCP (Network Control Protoc)
ol) information, PAP (Password Authentication Protoco
l) Information, IP address information, mobile communication network
User Information message, which is a call control message
Negotiating with the User to User information element
The call control message and exchange the call control message.
Then, using the information necessary for the PPP connection processing, the PP
It is characterized in that P connection processing is performed.

According to a second aspect of the invention, data is transmitted and received.
A data communication unit and a communication control unit that controls the data communication unit
And image coding / decoding for coding / decoding image data
Coding unit and voice coding for coding / decoding voice data
Communication end equipped with a decryption unit and using a packet network
In the end connection method, use the communication line to
Required for call connection processing of H.323 terminal when connecting
ITU-T Recommendation Q.931 SETUP information and
CONNECT information to call the mobile communication network
Us of the User Information message that is a control message
er to User Information element is used to lead negotiation
And exchange the call control message
The information necessary for the call connection process of the H.323 terminal.
In particular, it performs a preliminary connection process for the H.323 terminal.
To collect.

According to the invention of claim 3, data is transmitted and received.
A data communication unit and a communication control unit that controls the data communication unit
And image coding / decoding for coding / decoding image data
Coding unit and voice coding for coding / decoding voice data
Communication end equipped with a decryption unit and using a packet network
In the end connection method, use the communication line to
Required for capacity exchange processing of H.323 terminal when connecting
ITU-T Recommendation H.245 Terminal Capability S
et information to call control messages for mobile communication networks.
User to User information in the User Information message
Exchange in the previous negotiation using the news element,
Following the exchange of the call control messages, the H.3
H.32 using the information necessary for the capacity exchange process of the 23 terminals.
A feature is that capacity exchange processing of three terminals is performed.

According to a fourth aspect of the invention, data is transmitted and received.
A data communication unit and a communication control unit that controls the data communication unit
And image coding / decoding for coding / decoding image data
Coding unit and voice coding for coding / decoding voice data
Communication end equipped with a decryption unit and using a packet network
In the end connection method, use the communication line to
When connecting, establish a socket for image / voice communication.
ITU-T Recommendation H.245 Open Logi
cal channel information, mobile communication network call control
User of the message User Information message
Negotiation that precedes using the to User information element
, And following the exchange of the call control message,
Required to establish the socket for the image / voice communication
The socket for the image and voice communication using various information
It is characterized by performing processing.

The invention of claim 5 is the description of claims 1 to 4.
In the connection method of the communication terminal,
If you can understand the connection method of the communication terminal,
User to Message of User Information message that is a sage
er information element to exchange necessary information and connect
If you cannot understand how to connect the communication terminal,
The feature is that the connection is made by a regular connection procedure.

The invention of claim 6 is according to any one of claims 1 to 4.
To make the computer function with the connection method of the communication terminal of
A computer-readable record of the program
It is characterized by being a storage medium.

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

The connection method of claims 1 to 5 and the description of claim 6
According to the program operated by憶媒body, after PHS line connection directly, for transmitting collectively the information required by the subsequent negotiation, can reduce the number of negotiation that takes place at the time of connection between the terminals greatly Is.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a flow chart of processing in a communication terminal connection method of the present invention. In the present invention, first, a PHS line connection processing is performed between terminals (S).
11). Next, if the other terminal is a terminal that does not understand the connection method of the present invention, connection is made by the normal connection method (S12, S13).

When the other terminal is a terminal that understands the connection method according to the present invention, the call control message of the PHS is used to exchange information necessary for the subsequent negotiations (S12, S14). Then, the subsequent connection process is performed using the information acquired in step S14 (S1).
5). With the above connection method, the subsequent negotiation can be omitted.

FIG. 2 shows that the PH of the connection method according to the present invention is used.
FIG. 3 is a diagram showing a flowchart of processing until H.323 applications are connected to each other via S.
PPP (Point to Point Protocol) connection processing, H.32
Information that is exchanged during negotiations for call connection and capability exchange of three applications is collectively transmitted and processed in advance after PHS line connection. This eliminates the need for negotiation for connection for each layer, so that the connection time can be shortened.

The flow of processing when the connection processing is performed using PHS will be described below. First, the PHS line is connected (S21). Next, when the partner terminal is a terminal that does not understand the connection method according to the present invention, the PAIFS connection processing (S22, S2) is performed according to the normal connection sequence.
3), H.323 call connection processing (S24), H.323 capability exchange processing (S25), and image / voice communication mode determination processing (S26) are performed to complete the connection.

When the partner terminal is a terminal that understands the connection method according to the present invention, the PHS call control message is used to perform the PPP connection process, the H.323 application call connection process, the capability exchange process, and the image exchange process. Information necessary for the voice communication mode determination process is exchanged (S2).
2). After that, after connecting PIAFS (S27), using the information acquired in the process of step S22,
A call control socket is created (S28), a control information socket is created (S29), and a voice / image communication socket is created (S30) to complete the connection.

In the present invention, as described with respect to the information exchange processing in step S22, the PP is transmitted by using the call control message immediately after the call connection made when the PHS line is connected.
Information necessary for P connection processing, H.323 application call connection processing, and capability exchange processing is transmitted, and connection processing for each layer is performed.

FIG. 3 is a diagram showing a call connection message exchanged between terminals when the PHS line is connected. As shown in the figure, first, a Setup message is transmitted from the calling side to the called side. . The called party receiving this message responds with a Call Proceeding, Alert, and Connect message, and when the terminal on the calling side receives the Connect message, the connection of the PHS line is established (31).

According to the present invention, after the connection of the PHS line is established, one of the call control messages, User Informa
PPP connection processing between terminals using the option message,
Information necessary for the H.323 application call connection processing, capacity exchange processing, and image / voice communication mode determination processing is transferred, and each connection processing is performed (32).

The information exchange method of the present invention will be described below with reference to FIG. 4 (calling side) and FIG. 5 (calling side). At the time of calling, when the call connection is completed, it will be transmitted to the User User information element of the User Information message in the PPP connection process, the H.323 application call connection process, the capability exchange process, and the image / voice communication mode determination process. Information is added and transmitted to the partner terminal (S41, S42).

FIG. 6 shows the User Information message User
Indicates the format of the information added to the to User information element. Each piece of information has a length section 61 for storing the length of each piece of information.
And a data section 62 for storing information itself.
Here, as the connection information of PPP, LCP (Link Con
trol Protocol), NCP (Network Control Protoco)
l), PAP (Password Authentication Protocol) information is added. The H.323 call connection information includes ITU-T Recommendation Q.931 SETUP information at the time of calling.
When receiving a call, CONNECT of ITU-T Recommendation Q.931
T information is added. As H.323 capability information, IT
PER (ITU-T Recommendation X.691) encoding of Terminal Capabiliy information defined by UT Recommendation H.245 is added. As the image / sound communication mode, ITU
-PER (ITU-T Recommendation X.691) -encoded OpenLogical Channel information defined in Recommendation H.245 is transmitted.

When the called terminal receives the message,
It is determined whether the message is a User Information message (S51). Here, the received message is P
In the case of the IAFS frame, the connection information is not exchanged. If it is User Information, each information is acquired (S51, 52), and the PPP connection process is performed according to the information (S53). Here, PPP authentication processing,
If the IP address allocation process fails, the connection process is stopped (S54).

If the PPP connection processing is successful, then H.323 application call connection setting (S5
5), after performing capability exchange setting (S56) and image / sound communication mode setting processing (S57), User Informa
The information to be transmitted in the PPP connection process, the H.323 application call connection process, the capacity exchange process, and the image / voice communication mode determination process is added to the User to User information element of the action message (S58), and the caller side is notified. Send (S5
9). The information to be transmitted is the same as the information shown in FIG.

The terminal on the calling side, like the terminal on the called side,
When you receive a message, the message
It is determined whether it is a mation message (S43). Here, if the received message is a PIAFS frame, the connection information is not exchanged.

In step S43, User Informati
When it is on, each information is acquired (S44), and the PPP connection processing is performed according to the information (S45). If the PPP authentication process or the IP address allocation process fails, the connection process is stopped (S46). If the PPP connection processing is successful in step S45, the H.323 application call connection setting (S4
7), capability exchange setting (S48) and image / sound communication mode setting processing (S49).

By using the above connection method, the information necessary for the subsequent negotiation is transmitted in advance in the preceding negotiation, and the number of subsequent negotiations is reduced. Although the present embodiment has been described using PHS, a similar connection method can be implemented using a mobile communication network such as PDC or IMT-2000.

[0036]

According to the present invention, the information necessary for negotiation after the connection of the communication line is transmitted in advance in the preceding negotiation by using the call control message immediately after the connection of the communication line. Since it is possible to omit negotiations for PPP connection and call connection of H.323 applications, capability exchange, and determination processing of communication mode of voice / image, it is possible to shorten the time required for connection, and connection between H.323 applications. Can be done at high speed.

[Brief description of drawings]

FIG. 1 is a flowchart showing a connection method of the present invention.

FIG. 2 is a flowchart showing a connection method of the present invention.

FIG. 3 is a diagram showing a call connection message exchanged at the time of call connection.

FIG. 4 is a flowchart showing a connection method (calling side) of the present invention.

FIG. 5 is a flowchart showing a connection method (callee) of the present invention.

FIG. 6 is a diagram showing a transmission format of connection information.

FIG. 7 is a sequence diagram showing a procedure when an H.323 terminal connects using PHS.

[Explanation of symbols]

S11 to S15 ... Processing contents of connection method according to the present invention, S
21 to S30 ... Processing contents of connection method according to the present invention, 31
... communication line establishment processing, 32 ... connection information exchange processing, S
41 to S49 ... Processing contents of connection method according to the present invention (calling side), S51 to S59 ... Processing contents of connection method according to the present invention (callee side), 61 ... Area indicating length of transmission data, 6
2 ... Area for storing transmission data, 71 to 77 ... H.32
Procedure contents when 3 terminals connect using PHS.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04L 29/08 H04Q 7/38

Claims (6)

(57) [Claims] 1. A data communication unit for transmitting and receiving data,
A communication control unit that controls the data communication unit, an image encoding / decoding unit that encodes / decodes image data, and a voice encoding / decoding unit that encodes / decodes voice data,
In the method of connecting a communication terminal using a packet network, when connecting to the other terminal using a communication line,
Required for PPP (Point to Point Protocol) connection processing
LCP (Link Control Protocol) information, NCP (N
etwork Control Protocol) information, PAP (Password Au)
thentication Protocol) information, IP address information,
User, which is a call control message of the mobile communication network
Use User to User information element of Information message
And then exchange the call control message
The PPP connection using the information necessary for the PPP connection processing.
A method of connecting a communication terminal, characterized by performing a continuation process . 2. A data communication unit for transmitting and receiving data,
The communication control unit that controls the data communication unit and the image data
An image encoding / decoding unit that performs encoding / decoding and an audio data
Equipped with a voice encoding / decoding unit for encoding / decoding data
In connection method of communication terminal using packet network
And when connecting to the other terminal using the communication line,
ITU-T recommendation required for call connection processing of H.323 terminals
Q.931 SETUP information and CONNECT information
Is a call control message of a mobile communication network.
User Information message User to User information element
To exchange the call control message.
Next, information necessary for call connection processing of the H.323 terminal.
A method of connecting a communication terminal, comprising: performing a preliminary connection process of the H.323 terminal by using . 3. A data communication unit for transmitting and receiving data,
The communication control unit that controls the data communication unit and the image data
An image encoding / decoding unit that performs encoding / decoding and an audio data
Equipped with a voice encoding / decoding unit for encoding / decoding data
In connection method of communication terminal using packet network
And when connecting to the other terminal using the communication line,
The ITU-T recommendation required for H.323 terminal capability exchange processing.
Information on Terminal Capability Set of H.245 was moved.
User Inf, which is a call control message for the telecommunications network
Using User to User information element of ormation message
And following the exchange of said call control messages,
Note: Using information necessary for H.323 terminal capability exchange processing
A method of connecting a communication terminal, characterized by performing a capability exchange process of an H.323 terminal . 4. A data communication unit for transmitting and receiving data,
The communication control unit that controls the data communication unit and the image data
An image encoding / decoding unit that performs encoding / decoding and an audio data
Equipped with a voice encoding / decoding unit for encoding / decoding data
In connection method of communication terminal using packet network
And when connecting to the other terminal using the communication line,
Necessary to establish a socket for image and voice communication,
Information on Open Logical Channel of ITU-T Recommendation H.245
Is a call control message of a mobile communication network.
User Information message User to User information element
To exchange the call control message.
Then, the socket for the image and voice communication is established.
The information for the image and voice communication
A method of connecting a communication terminal, characterized by performing a process of establishing a connection. 5. Communication according to any one of claims 1 to 4.
In the terminal connection method, the partner terminal is the communication terminal.
Call control message if you can understand the connection method
User to User information in the User Information message that is
Use the elements to exchange the necessary information and connect,
If you do not understand the connection method of the communication terminal,
A method of connecting a communication terminal, characterized in that the connection is performed in the following procedure . 6. The method of claim 1 or a computer-readable storage medium characterized by recording a program for causing a computer to function in the communication terminal of the connection method according to any one of 4.