Duplex mismatch detection
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United States of America Patent
Stats
-
Jan 3, 2012
Grant Date -
Aug 9, 2007
app pub date -
Sep 19, 2006
filing date -
Feb 8, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus including a port to transmit first frames and receive second frames over a communication channel, the port including a collision detect circuit and a duplex mismatch circuit. The collision detect circuit detects collisions on the communication channel between the first frames and the second frames. The duplex mismatch circuit declares a duplex mismatch when the communication channel was established without attempting auto-negotiation, the port is in a half-duplex mode, and the collision detect circuit detects a very late collision involving one of the first frames. The very late collision occurs after a predetermined amount of data has been transmitted in the one of the first frames. The duplex mismatch indicates that a full-duplex mode is used with respect to the second frames.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- H04B Class
- 2.29 % this patent is cited more than
- 13 Age
