System switching method and apparatus without loss of signal in

Details System switching method and apparatus without loss of signal in System switching method and apparatus without loss of signal in

1991-08-15

1994-02-01

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, H04J 116

Patent

active

052837823

ABSTRACT:
In a communication apparatus using an asynchronous transfer mode, there is provided a system switching method, and apparatus, without loss of signal for performing cell multiplexing or cell switching in a duplex system including a primary system and a standby system. In system switching, control information for switching between the primary system and the standby system is prepared. When a cell is inputted to the communication apparatus, the prepared control information is appended in a header portion of the cell. The cell with control information appended thereto is transmitted to the duplex system including the primary system and the standby system. On the basis of the control information, cell transfer of each system is controlled.

REFERENCES:
patent: 5072440 (1991-12-01), Isono et al.
patent: 5130974 (1992-07-01), Kawamura et al.

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