Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-10-31
2011-11-01
Duong, Frank (Department: 2474)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S350000
Reexamination Certificate
active
08050223
ABSTRACT:
Enhanced frame preambles facilitate co-channel co-existence in a wireless communication environment by having at least one preamble characteristic that connotes channel-sharing information regarding the wireless communication environment. In an exemplary embodiment, a downlink subframe is received in one or more wireless communication signals in a wireless communication environment. A preamble is detected in the downlink subframe, and at least one characteristic of the preamble is ascertained. Channel-sharing information for the wireless communication environment is determined based upon the at least one characteristic of the preamble. In another exemplary embodiment, a channel is scanned to detect secondary preambles being transmitted on the channel. A current preamble configuration, including a permutation of preamble location and preamble content corresponding to the secondary preambles, is determined, which connote channel-sharing information. A next available preamble location may be adopted based on the current preamble configuration.
REFERENCES:
patent: 2008/0039107 (2008-02-01), Ma et al.
patent: 2008/0095195 (2008-04-01), Ahmadi et al.
Gummadi Srikanth
Piggin Paul W.
Porat Ron
Stanwood Kenneth L.
Duong Frank
Volpe and Koenig P.C.
Wi-LAN Inc.
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