Distributed type packet switching system and a method of control

Details Distributed type packet switching system and a method of control Distributed type packet switching system and a method of control

1995-06-19

1996-06-18

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

370 67, H04L 12407, H04L 1256, H04L 2902

Patent

active

055285899

ABSTRACT:
A distributed type packet switching system and a method of controlling a flow control execution, changes a communication control module to execute the flow control operation depending on the processing capability of each communication control module involved in the packet transmission. When a logical channel for the packet transmission between terminals 40 and 41 through a distributed type packet switching system 10 is established, a path f0 from the terminal 40 through a communication control module 30, a common bus 20 and a communication control module 31 to the terminal 41 is connected, and the communication control module 30 is specified to execute the flow control for this packet transmission. A congestion detected unit 330 supervises the load of processor in the communication control module 30 and reports the congestion condition to a flow control execution control unit 320 when it detects an overload condition of the processor. The flow control execution control unit 320 sends out a flow control substitution request signal S1 to the flow control execution control unit 321 in the other communication control module 31 through the common bus 20 to confirm whether it is acceptable. If the communication control module 31 has enough capacity to substitute the flow control execution, it sends back a flow control substitution acceptance signal S2 to the communication control module 30. Then, the packet transmission path is switched over from f0 to f1 and the flow control is executed by flow control execution unit 311 in the communication control module 31.

REFERENCES:
patent: 4550402 (1985-10-01), Gable et al.
patent: 4611321 (1986-09-01), Gabrielli et al.
patent: 4875206 (1989-10-01), Nichols et al.
patent: 4958341 (1990-09-01), Hemmady et al.

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