System and method for rate shifting for wireless VoIP

Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...

Reexamination Certificate

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C455S135000, C455S163100

Reexamination Certificate

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07944889

ABSTRACT:
A method of rate shifting specially suited for the voice traffic, which differentiates poor channel conditions from a heavily loaded channel of a WLAN and adapts to the network traffic condition and channel condition promptly with low rate of false shifting. Determining when to rate shift is based on a combination of the received signal strength indication and the retry rate.

REFERENCES:
patent: 6791959 (2004-09-01), Palmer et al.
patent: 2004/0165575 (2004-08-01), Yang et al.
patent: 2005/0086569 (2005-04-01), Hiddink et al.
patent: 2005/0195744 (2005-09-01), Ryan et al.
patent: 2005/0249157 (2005-11-01), Qian et al.
patent: 2006/0172711 (2006-08-01), King et al.
patent: 2006/0222118 (2006-10-01), Murthy et al.
PCT International Search Report, International Application No. PCT/US07/61741, Dec. 17, 2007.

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