Multiplex communications – Fault recovery
Reexamination Certificate
2005-09-27
2009-12-22
Nguyen, Steven H (Department: 2416)
Multiplex communications
Fault recovery
C370S226000, C370S246000, C370S252000, C370S392000, C370S401000
Reexamination Certificate
active
07636299
ABSTRACT:
A repeater and method provides a technique to minimize congestion and packet loss, which may be generated when a fault is detected in a ring type packet network or when the network recovers from such a fault. A repeater having a plurality of ports for transmitting and receiving packets in a ring type network for transmitting the received packets on the basis of an address included in a received packet and a transmitting port database indicating an identifier of a port to transmit the packet having the address as the destination, comprises a control packet processing block to detect reception of a fault notifying packet transmitted from a repeater having detected a fault and a control block to update, upon reception of the fault notifying packet from an immediately adjacent repeater, a port identifier of the transmitting port database having a port identifier of the port having received said fault notifying packet into a port identifier of a port connected to another immediately adjacent repeater.
REFERENCES:
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patent: 6704283 (2004-03-01), Stiller et al.
patent: 6766482 (2004-07-01), Yip et al.
patent: 2001/0048660 (2001-12-01), Saleh et al.
patent: 2002/0060986 (2002-05-01), Fukushima et al.
patent: 2002/0150039 (2002-10-01), Valdevit
patent: 2003-234747 (2003-08-01), None
Abe Hideji
Asa Akihiro
Kaneko Hiroyuki
Kawarai Kenichi
Tsurumi Osamu
Fujitsu Limited
Nguyen Steven H
Staas & Halsey , LLP
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