Telecommunications – Wireless distribution system
Reexamination Certificate
2007-07-03
2007-07-03
Urban, Edward F. (Department: 2618)
Telecommunications
Wireless distribution system
C455S455000, C455S502000, C455S515000
Reexamination Certificate
active
10462116
ABSTRACT:
A Wireless Local Area Network (WLAN) supports multiple slot times. A Basic Service Set (BSS)/Independent Basic Service Set (IBSS) of the WLAN services a plurality of WLAN devices (STAs) and at least one STA of the plurality of STAs supports multiple slot times. Operation is initiated using a short slot time. Then, the a determination is made that operation of the BSS/IBSS requires use of a long slot time, wherein the long slot time is longer than the short slot time. Operation of at least one of the plurality of STAs is modified to be consistent with the long slot time. In altering the operation the STA sets a local Long Slot Termination Time (LSTT). When a Target Beacon Transition Time (TBTT) is before the local LSTT, a beacon is transmitted that indicates that the long slot time is to be used and that includes the local LSTT. When the TBTT is after the local LSTT, a beacon is transmitted that indicates that the short slot time is to be used.
REFERENCES:
patent: 2002/0105970 (2002-08-01), Shvodian
patent: 2002/0163933 (2002-11-01), Benveniste
patent: 2003/0012166 (2003-01-01), Benveniste
patent: 2003/0163579 (2003-08-01), Knauerhase et al.
Broadcom Corporation
Garlick Bruce E.
Garlick & Harrison & Markison
Lee John J.
Urban Edward F.
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