Detecting change in a transport protocol window size without...

Details Detecting change in a transport protocol window size without... Detecting change in a transport protocol window size without...

2005-05-19

2009-11-03

Vu, Huy D. (Department: 2419)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C707S793000

Reexamination Certificate

active

07613118

ABSTRACT:
A method detects a change in TCP receive window size while preventing fragmentation of data. A TCP stack receives a segment that advertises a receive window size of zero. If data needs to be sent, and only if so, a timer is started. When the timer expires, a TCP segment that contains a first sequence number value equal to second sequence number representing sent but unacknowledged data minus one, and a segment length value of zero, is sent. Without sending a fragment of data, this triggers a peer TCP process to send an updated window size. A TCP ACK segment is received and contains an updated receive window size. If the updated receive window size is greater than a specified value, then the data is sent. Otherwise, a counter is incremented, and the steps are re-performed if the counter is less than a specified value.

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Persson, Anders et al., “TCP Probe: A TCP with built—in Path Capacity Estimation,” UCLA Network Research Lab, Computer Science Dept., PowerPoint Presentation, Mar. 18, 2005, Global Internet 2005, 22 pages.

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