‘Shield’: protecting high priority channel access attempts in overlapped wireless cells
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United States of America Patent
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Nov 17, 2015
Grant Date -
Aug 14, 2014
app pub date -
Apr 14, 2014
filing date -
Nov 2, 2001
priority date (Note) -
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Abstract
A method and system reduce interference between overlapping first and second wireless LAN cells contending for the same medium. Each cell includes a respective plurality of member stations. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point in the first cell transmits an initial shield packet to deter other stations from contending for the medium. The access point then transmits a beacon packet containing the inter-cell contention-free period value to member stations in the second cell. A second access point in the second cell can then delay transmissions by member stations in the second cell until after the inter-cell contention-free period expires.
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