Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Reexamination Certificate
2007-11-13
2007-11-13
Pham, Chi (Department: 2616)
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
C370S412000
Reexamination Certificate
active
10600727
ABSTRACT:
In a distributed switch fabric network (300) having a first node (302) having a first node transceiver port (305) and a second node (304) having a second node transceiver port (340), link level flow control (370) operating between the first node transceiver port and the second node transceiver port to in response to a congestion condition (321) in the second node transceiver port, wherein the link level flow control suspends transmission of one of a plurality of priority levels of packets (312) on a channel from the first node transceiver port to the second node transceiver port. The one of the plurality of priority levels of packets accumulates in one of a plurality of a transmit buffers (362) of the first transceiver port, where the one of the plurality of transmit buffers corresponds to the one of the plurality of priority levels of packets. Per-flow flow control (372) operates to modify transmission of the one of the plurality of priority levels of packets to the transmit buffer if the transmit buffer reaches a transmit threshold value (360). Link level flow control operates transparently to a traffic manager (352) of the first node if the congestion condition occurs and the one of the plurality of transmit buffers fails to reach the transmit threshold value.
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Hill Charles C.
Sandy Douglas L.
Elallam Ahmed
Motorola Inc.
Pham Chi
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