JPH0522359A - 128kbps data communication system in integrated services digital network - Google Patents

Abstract

PURPOSE:To attain transmission of a 128kbps data by employing two B-channels of one basic interface simultaneously. CONSTITUTION:A control circuit 11 sets the connection of two B channels simultaneously between ISDN terminal equipments or terminal adaptors, an identification signal control circuit 10 sends/receives an identification signal to detect a difference of transmission delay time between the two B channels before data communication after setting of simultaneous connection, stores a received identification signal to a tentative storage circuit 8 to detect the transmission delay time difference of the two B channels. A data division circuit 3 divides a 128kbps data signal from a data terminal equipment 30 received via a data terminal interface 2 into two B channels and the resulting signal is sent. A data synthesis circuit 9 decodes the two received 64kbps data signals into the original 128kbps data signal by referring the transmission delay time difference detected precedingly and sends the decoded signal to the data terminal equipment 30 via the data terminal interface 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication system,
In particular, it relates to a data communication system of 128 Kbps in the ISDN network.

[0002]

2. Description of the Related Art Data transmission in a conventional ISDN basic interface uses B channel and 1 channel.
Data transmission of 4 Kbps was the maximum speed. In order to perform data transmission exceeding this, H ₀ (384 Kbps) or H ₁₁ (1.5
bps) etc. had to be used.

[0003]

The data transmission by the basic interface of the conventional ISDN network is 64 Kb.
In order to transmit data in excess of ps, the primary group rate interface must be used because the difference in transmission delay between the two B channels in one basic interface is not guaranteed. Not only does it become larger, but the line charges are also higher, which is uneconomical.

An object of the present invention is to use two B channels of one ISDN basic interface at the same time to 128
An object is to provide a 128 Kbps data communication system using an ISDN basic interface capable of Kbps data transmission.

[0005]

In the data communication system of 128 Kbps in the ISDN network of the present invention, two B channels of one basic interface are simultaneously connected in the data communication between terminals or terminal adapters having the ISDN basic interface. Means for transmitting an identification signal for identifying a transmission delay time of the two B channels to the two connected B channels, and between the two B channels of the identification signal received through the two B channels. Means for detecting a difference in transmission time, means for transmitting data of 128 Kbps through two B channels, and means for restoring a data signal received through two B channels into a data signal of 128 Kbps from the previously detected transmission time difference. Have and.

[0006]

The present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention.

The ISDN terminal adapter 1 is an ISD
A control circuit 11 for simultaneously controlling connection setting of two B channels between N terminals or terminal adapters and an identification signal for detecting a difference in transmission delay between two B channels after connection and before data communication 128K from the identification signal control circuit 10 and the data terminal 30 that detects the difference in transmission delay between the two B channels from the received identification signal.
The data division circuit 3 which divides the bps data signal into two B channels and sends it out, and the two 64 Kbps data signals received from the two B channels are detected based on the difference in transmission delay between the two channels which is detected first. The data synthesizing circuit 9 restores the 128 Kbps data signal.

The data communication of 128 Kbps is ISDN.
Connection of two B channels from the control circuit 11 of the terminal adapter 1 through the D channel control circuit 7 to the other IS
Set between the DN terminal 1. When the two B channels are connected, the control circuit 11 instructs the identification signal control circuit 10 for identifying the transmission delay time of the two B channels to send the identification signal to the B channel transmission circuit 4. B
The channel transmission circuit 4 sends this identification signal through the ISDN interface circuit 5 to the ISDN terminal adapter 1 of the communication partner.

Upon receiving the identification signal from the game, the ISDN terminal adapter 1 writes this identification signal in the temporary storage circuit 8 through the ISDN interface circuit 5 and the B channel receiving circuit 6. The identification signal written in the temporary storage circuit 8 is read by the identification signal control circuit 10 and
The difference in transmission delay of the two B channels is detected. The detected transmission delay is sent to the control circuit 11 and is passed through the D channel control circuit 7 to the ISDN terminal adapter 1 of the game.
Communicate to. When a difference in transmission delay is detected by both ISDN terminal adapters 1, data transmission of 128 Kbps is started.

A 128 Kbps data signal from the data terminal 30 is transmitted to the data division circuit 3 through the data terminal interface 2. The data division circuit 3 has 12
The 8 Kbps data signal is divided into two 64 Kbps data signals and sent to the B channel transmission circuit 4. B
The channel transmission circuit 4 transmits the ISDN interface circuit 5 and the ISDN network 20 to the ISDN terminal adapter 1 of the game.

Two 64 Kbps through the ISDN network 20
The ISDN interface circuit 5 which has received the data signal of s writes it to the temporary storage circuit 8 through the B channel reception circuit 6. The control circuit 11 reads the 64 Kbps data signal written in the temporary storage circuit 8 in consideration of the difference between the two previously detected transmission delays. The two read data signals of 64 Kbps are combined by the data combining circuit 9 and sent to the data terminal 30 through the data terminal interface 2.

[0013]

As described above, according to the present invention, two B channels of one basic interface are used at the same time.
128Kbps because 28Kbps data transmission is possible
It has an effect that high-speed communication of s can be implemented easily and economically without using the primary group speed interface.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 ISDN terminal adapter 2 data terminal interface 3 data dividing circuit 4 B channel transmitting circuit 5 ISDN interface circuit 6 B channel receiving circuit 7 D channel control circuit 8 temporary storage circuit 9 data synthesizing circuit 10 identification signal control circuit 11 control circuit 20 ISDN network

Claims (1)

Claim: What is claimed is: 1. In data communication between terminals or terminal adapters having an ISDN basic interface, means for simultaneously connecting two B channels of one basic interface and two connected B channels. To 2
Means for sending an identification signal for identifying the transmission delay time of one B channel; means for detecting a difference in transmission time between the two B channels of the identification signal received through the two B channels; 128Kb through the channel
128 Kbp in an ISDN network having means for transmitting data of ps and means for restoring a data signal received through two B channels to a data signal of 128 Kbps from the previously detected transmission time difference.
s data communication system.