JPH05122249A - Data transfer system - Google Patents

Abstract

PURPOSE:To reduce the time required for data transfer when caller packet terminal equipment transfers same data to plural terminal equipment. CONSTITUTION:An ISDN exchange 1 is provided with a database 7 used to register in advance a list of communication opposite terminal equipment desired by the user of an ISDN packet terminal equipment 9. A packet processing section 6 of the ISDN exchange 1 receives a data simultaneous transfer request from the ISDN packet terminal equipment 9 and retrieves the database 7 to select a destination to be transferred which is registered in the database. The packet data sent by the ISDN packet terminal equipment 9 are simultaneously transferred to the selected plural opposite terminal equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a data transfer system,
In particular, it relates to a data transfer method to a packet terminal in an ISDN switching system.

[0002]

2. Description of the Related Art An ISDN switch having a conventional ISDN packet switching function has a channel demultiplexing unit 2, a switch 3, a protocol processing unit 4, a switching control unit 5 and a packet processing unit 11 as shown in FIG. It is configured to include and. The procedure of the packet communication service by the ISDN exchange 10 is such that when the packet terminal makes a call, only one desired communication partner terminal is designated, and the ISDN exchange 10
In response to this, a communication path between the source packet terminal and the partner packet terminal is set, and after the communication path is set, the sender packet terminal transfers data to the partner packet terminal.

As a protocol for setting a communication path, the Q. Recommendation by the International Telegraph and Telephone Consultative Committee (CCITT) is used. 93
1 procedure and X. Twenty-five procedures are used.

[0004]

According to this conventional data transfer method to a packet terminal, when the originating packet terminal wants to transfer the same data to a plurality of packet terminals, the communication paths are respectively transmitted to the plurality of partner packet terminals. Since the setting procedure and the data transfer have to be performed, there is a problem that it takes time until the data transfer is completed, and thus the communication charge becomes high.

[0005]

A data transfer system according to the present invention is an ISD comprising an ISDN packet terminal having a packet communication function and an ISDN exchange connected to the ISDN packet terminal and having an ISDN packet switching function.
In the N exchange system, the ISDN exchange is connected to the I
A database for preliminarily registering a list of communication partner terminals desired by the user of the SDN packet terminal is provided, and the ISDN exchange receives the data simultaneous transfer request from the ISDN packet terminal on the originating side and searches the database. The registered destinations to be transferred are selected, and the I
This is a configuration in which the packet data transmitted by the SDN packet terminal is transferred at the same time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an ISDN exchange system according to an embodiment of the present invention. The ISDN switching system includes an ISDN packet terminal 9 having a packet communication function.
And an ISDN exchange 1 connected to the ISDN packet terminal 9 via the network terminating device 8.
The ISDN exchange 1 includes a channel demultiplexing unit 2 that demultiplexes channels and a switch 3 that forms a network.
A protocol processing unit 4 for performing protocol processing, an exchange control unit 5 for controlling the switch 3, a packet processing unit 6 for processing packets, and a list of partner terminals desired by a user of the packet terminal are registered in advance. Database 7 for

FIG. 2 is a diagram for explaining an embodiment of the present invention, in which the ISDN packet terminal 9 on the transmitting side transmits the same data to A and C of the packet terminals A to C on the receiving side. , And the corresponding destination is extracted from the database 7 of the ISDN exchange 1, and data is transferred to A and C at the same time.

FIG. 3 is a diagram showing a signal sequence for explaining an embodiment of the present invention. The packet terminal on the originating side is CCITT Q. IS according to call setting procedure a of 931
A call setup is performed for the DN exchange, a call setup acceptance is received from this exchange, then a response is received and a response confirmation is sent to the exchange.

Then, X. The packet terminal transmits an asynchronous balanced mode setting frame (SABM) to the ISDN exchange, receives an unnumbered confirmation frame (UA) from the exchange, and establishes a communication path with the packet processing unit according to the level link setting procedure b of 25. After the call is established, the call destination request packet I (CR) allows the communication destination to
The packet processing unit is notified that the packet terminals are numbered 1 and # 3.

The packet processing unit searches the database,
It is determined that the packet terminals corresponding to the numbers # 1 and # 3 are the packet terminal A and the packet terminal C.

Next, the packet processing unit sets a communication path for each of the packet terminals according to the call setting procedure c for the destination packet terminal on the receiving side. For the packet terminal A, call setting is first performed, and a response is received from the packet terminal A and a response confirmation is transmitted. Next, the packet processing unit transmits the SABM similar to that described above to the packet terminal A, receives the UA from the packet terminal A, and subsequently receives the incoming packet I
(CN) is transmitted and the incoming call acceptance packet I (CA) is received to set the communication path. The same procedure is performed for the packet terminal C.

When the communication path is set for both packet terminals A and C, the packet processing unit notifies the packet terminal on the sending side of the completion of the communication path setting with a connection completion packet I (CC). Then, the originating terminal starts data transfer.

The packet processing unit transfers this data and the packet terminals A and C as shown in FIG. 3, so that the data is transferred to a plurality of terminals at the same time.

[0015]

As described above, the present invention is based on the ISDN.
The exchange is provided with a database for pre-registering a list of communication partner terminals desired by the user of the packet terminal, and the ISDN exchange receives a data simultaneous transfer request from the packet terminal on the sending side and is already registered from the database. The destination is selected and the originating packet terminal is 1
Since it is configured to transfer the same data to multiple packet terminals at the same time by the call setting procedure and data transfer for each time,
The packet terminal on the sending side shortens the time required for communication,
Therefore, there is an effect that the communication charge for data transfer is reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an ISDN exchange system according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining an embodiment of the present invention.

FIG. 3 is a diagram showing a signal sequence for explaining an embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a conventional ISDN exchange.

[Explanation of symbols]

 1 ISDN exchange 2 Channel demultiplexing unit 3 Switch 4 Protocol processing unit 5 Switching control unit 6 Packet processing unit 7 Database 8 Network terminating device 9, A to C ISDN packet terminal a Q. 931 call setup procedure b X. Level 2 link setup procedure by C. 25 c) Call setup procedure for partner packet terminal

Claims (1)

[Claims] 1. An ISDN packet terminal having a packet communication function and an IS connected to the ISDN packet terminal.
In an ISDN exchange system including an ISDN exchange having a DN packet exchange function, a database for previously registering a list of communication partner terminals desired by a user of the ISDN packet terminal is provided in the ISDN exchange, and the ISDN exchange comprises: The ISD on the originating side
A simultaneous data transfer request is received from the N packet terminal, the database is searched, the registered transfer destinations are selected, and the packet data transmitted by the ISDN packet terminal are simultaneously transmitted to the selected plurality of communication partner terminals. A data transfer method characterized by transferring.