Data rate shifting methods and techniques

Details Data rate shifting methods and techniques Data rate shifting methods and techniques

2008-04-08

2008-04-08

Ly, Anh-Vu (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

Reexamination Certificate

active

07355997

ABSTRACT:
A technique for determining when to change a data rate by determining the cause of packet loss. The technique distinguishes between collision mediated packet loss and poor signal mediated packet loss. Rate shifting to a lower rate is performed after determining poor signals are causing packet loss. After switching to a lower rate, the packet loss rate can be compared to the pre-switch packet loss rate. If the packet loss rate has not improved by shifting to a lower data rate, then the data rate can be shifted to a higher rate. The technique can use a combination of channel response, signal strength, packet loss rate and throughput to determine when to switch data rates. A communication unit can maintain separate histories for each unit it is communicating with and employ a different data rate for each unit.

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