Providing extended range modes as part of the 802.11n standard

Details Providing extended range modes as part of the 802.11n standard Providing extended range modes as part of the 802.11n standard

2011-07-05

2011-07-05

Pham, Chi H (Department: 2471)

Multiplex communications

Communication over free space

Reexamination Certificate

active

07974225

ABSTRACT:
An extended range preamble is disclosed, for transmission between extended range 802.11ndevices. The extended range preamble consists of a high-throughput signal field, in which a modulation coding scheme rate and payload length are specified by the transmitting device. The extended range preamble also includes an expanded preamble, which is adjacent to the high-throughput signal field, and is not understood by non-extended range devices. The modulation coding scheme rate is specified as either one of the rates supported in non-extended range 802.11 devices or as a reserved modulation coding scheme not understood by the non-extended range devices. In either circumstance, the non-extended range device respects the preamble, and thus does not itself attempt a transmission during processing of the preamble.

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Fanny Mlinarshy; Title: “802.11n: the next generation in wireless LAN technology”. Date: “Mar. 1, 2007”; Publisher: “Cabling installation & maintenance”.

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