802.11 enhanced distributed channel access
First Claim
1. A wireless access point comprising:
- a medium access control (MAC) circuit configured to generate a first traffic indication map, wherein the first traffic indication map announces a restricted access window; and
a physical layer device configured totransmit a first beacon over a wireless medium, wherein the first beacon includes the first traffic indication map, wherein the restricted access window begins subsequent to transmission of the first beacon, and wherein the restricted access window ends prior to transmission of a second beacon, wherein the second beacon is transmitted subsequent to the first beacon with no intervening beacons,during the restricted access window, access the wireless medium using a first set of channel access parameters, wherein the first set of channel access parameters includes a first short interframe space and a first slot time, andsubsequent to the restricted access window but prior to the transmission of the second beacon, access the wireless medium using a second set of channel access parameters, whereinthe second set of channel access parameters includes a second short interframe space and a second slot time,the first short interframe space and the second short interframe space are equal,the second slot time and the first slot time are related by an integer multiple, andthe integer is greater than one.
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Accused Products
Abstract
A method includes generating a first traffic indication map that announces a restricted access window. The method includes transmitting a first beacon, including the first traffic indication map, over a wireless medium and then transmitting a second beacon. The restricted access window begins after the first beacon and ends before the second beacon. The method includes, during the restricted access window, accessing the wireless medium using first channel access parameters; and after the restricted access window but before the second beacon, accessing the wireless medium using second channel access parameters. The first channel access parameters include a first short interframe space and a first slot time. The second channel access parameters include a second short interframe space equal to the first short interframe space and a second slot time. The second slot time and the first slot time are related by an integer multiple that is greater than one.
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Citations
34 Claims
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1. A wireless access point comprising:
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a medium access control (MAC) circuit configured to generate a first traffic indication map, wherein the first traffic indication map announces a restricted access window; and a physical layer device configured to transmit a first beacon over a wireless medium, wherein the first beacon includes the first traffic indication map, wherein the restricted access window begins subsequent to transmission of the first beacon, and wherein the restricted access window ends prior to transmission of a second beacon, wherein the second beacon is transmitted subsequent to the first beacon with no intervening beacons, during the restricted access window, access the wireless medium using a first set of channel access parameters, wherein the first set of channel access parameters includes a first short interframe space and a first slot time, and subsequent to the restricted access window but prior to the transmission of the second beacon, access the wireless medium using a second set of channel access parameters, wherein the second set of channel access parameters includes a second short interframe space and a second slot time, the first short interframe space and the second short interframe space are equal, the second slot time and the first slot time are related by an integer multiple, and the integer is greater than one. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of operating a wireless access point, the method comprising:
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generating a first traffic indication map, wherein the first traffic indication map announces a restricted access window; transmitting a first beacon over a wireless medium, wherein the first beacon includes the first traffic indication map, and the restricted access window begins subsequent to transmission of the first beacon; transmitting a second beacon subsequent to the first beacon with no intervening beacons, wherein the restricted access window ends prior to transmission of the second beacon; during the restricted access window, accessing the wireless medium using a first set of channel access parameters, wherein the first set of channel access parameters includes a first short interframe space and a first slot time; and subsequent to the restricted access window but prior to the transmission of the second beacon, accessing the wireless medium using a second set of channel access parameters, wherein the second set of channel access parameters includes a second short interframe space and a second slot time, the first short interframe space and the second short interframe space are equal, the second slot time and the first slot time are related by an integer multiple, and the integer multiple is greater than one. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification