Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Reexamination Certificate
2011-04-05
2011-04-05
Pham, Chi H. (Department: 2471)
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
C370S235000, C370S395200, C709S223000, C709S227000, C709S250000
Reexamination Certificate
active
07920470
ABSTRACT:
A network adapter and corresponding method for its use are disclosed. The network adapter has an operational mode that allows a host CPU to offload transmission of a block of data to the adapter. The adapter segments the block into fragments, and builds a data packet for each fragment. The adapter transmits these packets with an adapter-implemented flow control. This flow control uses: a context engine that tracks flow control variables for a “context” established for the block; a context memory for storing the variables; and a receive filter that updates flow control information for the block based on ACK packets received from the remote endpoint receiving the data packets. Because the network adapter implements flow control for data blocks that the network adapter segments, intermediate ACK packets corresponding to that block can be intercepted by the adapter, before they pass to the host, conserving host resources. An added advantage is that the host CPU can offload data blocks larger than the remote endpoint's receive window size, since the adapter can follow the transmit window and transmit packets at appropriate intervals. This further decreases load on the host CPU, decreases latency, and improves bandwidth utilization.
REFERENCES:
patent: 5761427 (1998-06-01), Shah et al.
patent: 5925097 (1999-07-01), Gopinath et al.
patent: 5937169 (1999-08-01), Connery et al.
patent: 6189065 (2001-02-01), Arndt et al.
patent: 6301249 (2001-10-01), Mansfield et al.
patent: 6345301 (2002-02-01), Burns et al.
patent: 6487689 (2002-11-01), Chuah
patent: 6563821 (2003-05-01), Hong et al.
patent: 6564267 (2003-05-01), Lindsay
patent: 6754228 (2004-06-01), Ludwig
patent: 6788704 (2004-09-01), Lindsay
patent: 2004/0042464 (2004-03-01), Elzur et al.
Yong Hua Thia “Evaluation of Bypass Architecture for High-Speed Bulk Data Transfer through deeply layered protocol stacks”, A Thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Mar. 5, 1994, pp. 196.
Y. H. Thia, et al., “High-Speed OSI Protocol Bypass Algorithm with Window Flow Control”, Third International Workshop on Protocols for High-Speed Networks, vol. (C-9), Apr. 16, 1992, pp. 53-69.
Microsoft, “Windows 2000 DDK Task Offload”, Oct. 22, 1999, 19 pages.
Hom Shick
Intel Corporation
Pham Chi H.
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