System and method for transmitting information in a...

Multiplex communications – Data flow congestion prevention or control

Reexamination Certificate

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C370S252000, C714S748000

Reexamination Certificate

active

07460472

ABSTRACT:
A method and system for transmitting information between a sending means and a receiving means using packets for information transmission. The receipt of transmitted packets is acknowledged and unacknowledged packets are retransmitted from the sending means. The amount of transmitted unacknowledged information or the number of consecutive unacknowledged packets is detected, and the reason for information or packet loss is determined based on the amount of transmitted unacknowledged information or the number of consecutive unacknowledged packets. This amount is compared with a path maximum transmission unit (PMTU) to determine the reason for loss. A single or small number of unacknowledged packets is determined to be a result of Bit Error Rate (BER), whereas a larger number of consecutive unacknowledged packets may be determined to be congestion. Congestion control parameters are kept unchanged when the reason for loss is caused by Bit Error Rate (BER), whereas control parameters are changed when the reason for loss is congestion.

REFERENCES:
patent: 6757248 (2004-06-01), Li et al.
patent: 2003/0123481 (2003-07-01), Neale et al.
patent: 2004/0042460 (2004-03-01), Gruhl et al.

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