JPS63135041A - Connection controller for inter-packet switching networks - Google Patents

Abstract

PURPOSE:To attain data communication between data processing units by means of the interface of the CCITT recommendations 25 via plural packet switching networks by utilizing network ID, DTE address of a call user data part of CR, CN packets. CONSTITUTION:In receiving a CN packet from a packet switching network, a communication processing means 11 gives a call user data part including a CN packet network ID 24 and a DTE address part (2)25 to a network selection processing means 12. The network selection processing means 12 checks whether the logic channel belonging to the line subscribed to the packet switching network corresponding to the network management table 31 is in use if the network ID 24 on the CN packet and the network IC of the network management table 31 of a communication control information storage section 13 are concident and if not is use, the content of the received DTE address part (2)25 is set to the DTE address part (1)22 to use a logic channel is use for the transmission of the CR packet by the request to the communication processing means 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bucket switching network connection of a data communication system between data processing devices using a CCI T 'f' control X, 25 interface via a bucket switching network. Regarding a control device.

[Conventional technology]

There is no conventional technique for communicating data via multiple bucket-switched networks with 25 interfaces.

[Problem to be solved by the invention]

As described above, the conventional O technology has the disadvantage that all data communications cannot be performed via multiple buckets 9: switching networks.

Problem C: Means for determining the cost] The 74-ket or switching network connection device of the present invention has communication processing means for controlling the bucket procedure of the CCITT Recommendation The data processing equipment that wishes to communicate with the existing data processing equipment has set in advance in the call user data section the network identification information that is required when selecting another bucket replacement network, and) Il! The communication processing means analyzes the subscriber number to which the data processing device of the other party with which it wishes to communicate is subscribed, from the CN bucket frame received by the communication processing means, Select the bucket switching network that is connected to the selected bucket switching network, and check whether the logical channel connected to the line that is subscribed to the selected bucket switching network is unused. If it is unused, process the other party's data in the call user data section. It requests the communication processing means to set the subscriber number of the device in the CN bucket and send it using an unused logical channel, and after the creation of the CN bucket is completed, it sends the CA to the logical channel that received the CN bucket. Mi to send a packet
Controls the connection of logical channels between bucket exchange networks by requesting the J65 communication f8 processing means, and if there is no unused logical channel, the CQ bucket I- is sent to the logical channel that received all the previous CN bucket frames. Cutting off logical channels between bucket switching networks by requesting the communication processing means to transmit; The communication fff control information storage means has network identification information for managing the network and line control information for managing the usage status of cooking channels belonging to lines that are subscribed to the bucket exchange network.

〔Example〕

The present invention will be explained with reference to the drawings. Referring to FIG. 1, a bucket switching inter-network connection control device l according to an embodiment of the present invention includes communication processing means 11. It is composed of a network selection processing means 12 and a communication control information storage section 13. This device 1 is connected between bucket switching networks.

Figure 2 shows the format of the CR and CN bucket frames in the CCITT Recommendation X, 25 interface construction procedure.
and a DTE address section (2) 25.

Figure 3 shows the contents of the storage area that is mainly required when a bucket conversion network is selected. .

Next, the operation of the present invention will be explained in detail with reference to the drawings.

First, upon receiving the CN bucket v from the bucket switching network, the communication processing stage 11 uses the network ID 24 and D of the CN bucket.
The call user data section including the TE address section t2) 25 is passed to the network selection processing means 12.

The network selection processing means 12 uses the communication control information storage unit 1 generated for each bucket switching network in which the network ILI 24 of the CN bucket and the bucket switching network connection control device 1 are connected.
If they match, check whether the channel connected to the line that has joined the bucket switching network corresponding to network management table 31 is unused. , the line management table (173
Check according to the contents of 2, and if it is unused, the received C
N, < Instruct the communication processing means 11 to set the contents of the DTE address field (2) 25 of Kerato to the DTE address field (1) 22 of the CN bucket and transmit the CR bucket using an unused logical channel. do.

If there are no unused logical channels, use the line management table (
Investigate the internal nature of 2733.

Thereafter, in the same manner, unused logical channels connected to all lines subscribed to the bucket switching network corresponding to the penalty management table 31 are checked. If there is no unused fa logical channel, the energization processing means 11 is requested to transmit a CQ bucket to the logical channel that received the CN bucket.

After receiving the CC bucket for the transmission CR bucket, the communication processing means 11 transmits the CN bucket (CA bucket for the reception logical channel).

Through the above procedure, the connection between the data processing devices using the CCI'rT Recommendation X and 25 interfaces is completed, and data transfer becomes possible.

〔Effect of the invention〕

As explained above, the bucket switching inter-network connection control device of the present invention has the following effects by using the network ID and DTE address in the call user data part of the CR and CN buckets.

1. Data communication between data processing devices via the CCI T i' Recommendation 25 interface is possible via the mantissa bucket exchange network.

When 21 data processing devices rM communicate data with other data processing devices that have joined multiple bucket switching networks,
There is no need to subscribe to each of multiple bucket switching networks.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and the second cause is CR, C
FIG. 3 is a diagram showing the format of the N-bucket frame, and is a diagram showing the network-U management table and line management table of the 1'@-I control information storage section in FIG. In the figure, 1...Bucket exchange network connection control device, 11.
. . . Communication processing means, 12 . . . Network selection processing means, 13 Fig. 4

Claims (1)

[Claims] CCITT Recommendation X. In a system that performs data communication between data processing devices using the X.25 interface, CCITT Recommendation X. Communication processing means that controls the bucket procedure of the 25 interface and other buckets that are set in advance in the call user data section by a data processing device that wishes to communicate with a data processing device that has joined another bucket exchange network. The network identification information required when selecting a switching network and the subscriber number to which the other party's data processing device with which communication is desired are subscribed are analyzed from the CN bucket frame received by the communication processing means, and data communication is performed. Select the bucket switching network to which the other party's data processing device has joined, and then check whether the logical channel belonging to the line joined to the selected bucket switching network is unused, and if it is unused, the call user The communication processing means is requested to set the subscriber number of the other party's data processing device in the data part in the CR bucket and transmit using an unused logical channel, and after the creation of the CR bucket is completed, the C
Controls the connection of logical channels between bucket switching networks by requesting the communication processing means to transmit the CA bucket to the logical channel that received the N bucket, and if there is no unused logical channel, the CN bucket frame is network selection processing means for controlling disconnection of logical channels between bucket switching networks by requesting said communication processing means to transmit a CQ bucket to a logical channel that has received a CQ bucket; and said network selection processing means for selecting a bucket switching network. A bucket switching network comprising a communication control information storage unit having network identification information to be referred to for accessing the network, and line control information for managing the usage status of logical channels belonging to lines joined to the bucket switching network. Interconnection control device.