Hybrid coordination function (HCF) access through tiered contention and overlapped wireless cell mitigation
First Claim
1. A method for enabling a plurality of wireless cells to have access to a medium, each cell including a respective plurality of member stations, comprising:
- assigning a value for a first inter-cell contention-free period to a first access point station in a first cell, associated with an accessing order in the medium for member stations in the first cell and a second cell of the plurality of cells during a transmission frame; and
transmitting by the first access point station in the first cell, a beacon packet containing the value for the first inter-cell contention-free period, wherein the beacon packet is for an overlapped station that is occupying the first cell and the second cell, and for enabling the value for the first inter-cell contention-free period to be forwarded to member stations in the second cell, to delay transmissions by member stations in the second cell until after the first inter-cell contention free period has expired.
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Accused Products
Abstract
A method and system reduce interference between overlapping first and second wireless LAN cells in a medium. Each cell includes a respective plurality of member stations and there is at least one overlapped station occupying both cells. 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 transmits a beacon packet containing the inter-cell contention-free period value, which is intercepted at the overlapped station. The overlapped station forwards 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.
120 Citations
15 Claims
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1. A method for enabling a plurality of wireless cells to have access to a medium, each cell including a respective plurality of member stations, comprising:
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assigning a value for a first inter-cell contention-free period to a first access point station in a first cell, associated with an accessing order in the medium for member stations in the first cell and a second cell of the plurality of cells during a transmission frame; and transmitting by the first access point station in the first cell, a beacon packet containing the value for the first inter-cell contention-free period, wherein the beacon packet is for an overlapped station that is occupying the first cell and the second cell, and for enabling the value for the first inter-cell contention-free period to be forwarded to member stations in the second cell, to delay transmissions by member stations in the second cell until after the first inter-cell contention free period has expired. - View Dependent Claims (2, 3, 4, 5)
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6. A method for enabling a plurality of wireless cells to have access to a medium, each cell including a respective plurality of member stations, comprising:
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assigning a value for a first inter-cell contention-free period to a first access point station in a first cell, associated with an accessing order in the medium for member stations in the first cell and a second cell of the plurality of cells during a transmission frame; and transmitting by the first access point station in the first cell, a beacon packet containing the value of the first inter-cell contention-free period. - View Dependent Claims (7, 8, 9, 10)
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11. A system for enabling a plurality of wireless cells to have access to a medium, each cell including a respective plurality of member stations, comprising:
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means for assigning a value for a first inter-cell contention-free period to a first access point station in a first cell, associated with an accessing order in the medium for member stations in the first cell and a second cell of the plurality of cells during a transmission frame; and the first access point station in the first cell for transmitting a beacon packet containing the value of the first inter-cell contention-free period, wherein the beacon packet is for an overlapped station that is occupying the first cell and the second cell, and for enabling the value for the first inter-cell contention-free period to be forwarded to member stations in the second cell, to delay transmissions by member stations in the second cell until after the first inter-cell contention free period has expired. - View Dependent Claims (12, 13, 14, 15)
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Specification