Method and apparatus for preventing head of line blocking in...

Details Method and apparatus for preventing head of line blocking in... Method and apparatus for preventing head of line blocking in...

2004-09-29

2010-06-22

Kumar, Pankaj (Department: 2467)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

C370S235000, C370S254000

Reexamination Certificate

active

07742412

ABSTRACT:
A method for preventing head of line blocking in an Ethernet system. In one embodiment, a network interface detects whether there is traffic flow congestion between the network interface and a data processing unit such as a CPU or other peripheral. If yes, the network interface communicates the congestion status to its attached Ethernet switch. In another aspect of the invention, the Ethernet switch then stops serving the congested port or queue, and informs a switch from which the traffic flow causing the congestion originates. In a further aspect, the originating switch then reduces bandwidth for the traffic flow causing the congestion. In a still further aspect, the originating switch can take the bandwidth that it acquired because of reducing the congesting traffic flow, and use it to increase bandwidth for other traffic flow.

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