Methods and arrangements to assign slots in restricted access windows in wireless networks
First Claim
1. A device comprising:
- a memory;
circuitry coupled with the memory to;
receive, via a beacon frame, a restricted access window (RAW) parameter set (RPS) information element (IE) to determine a station-to-slot mapping function and a traffic indication map bitmap;
determine a number of slots in the RAW (Nraw) based on the RPS IE;
determine, based upon the mapping function, an association between a station and a slot in the restricted access window based upon a position of the station in the traffic indication map bitmap, wherein the mapping function comprises a position (x) of the station in a traffic indication bitmap, wherein x is a position index of an association identifier (AID) of the device if the RAW is restricted to stations whose AID bits in the TIM bitmap are set to 1;
wherein, if the RAW is not restricted to stations whose AID bits in the TIM bitmap are set to 1, x is the AID of the device; and
contend for access to an access point in the slot of the RAW.
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Accused Products
Abstract
Logic may implement a slot assignment scheme that uses information provided in traffic indication map (TIM) information element (IE) and restricted access window (RAW) parameter set (PS) IE to determine a station-to-slot mapping function for communication of slot assignments to stations for RAWs. The TIM IE may comprise a bitmap indicating paged and unpaged stations. The RAW PS IE may comprise a duration and a slot duration. Logic may implement the station-to-slot function by determining the number of slots in a RAW and correlating slot assignments for stations based upon a position for the station in the TIM bitmap. The TIM bitmap may identify each station via a bit on a page in the bitmap based upon an assignment of the station to a position in the TIM bitmap. The station-to-slot mapping function may use an offset for fair access.
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Citations
32 Claims
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1. A device comprising:
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a memory; circuitry coupled with the memory to; receive, via a beacon frame, a restricted access window (RAW) parameter set (RPS) information element (IE) to determine a station-to-slot mapping function and a traffic indication map bitmap; determine a number of slots in the RAW (Nraw) based on the RPS IE; determine, based upon the mapping function, an association between a station and a slot in the restricted access window based upon a position of the station in the traffic indication map bitmap, wherein the mapping function comprises a position (x) of the station in a traffic indication bitmap, wherein x is a position index of an association identifier (AID) of the device if the RAW is restricted to stations whose AID bits in the TIM bitmap are set to 1;
wherein, if the RAW is not restricted to stations whose AID bits in the TIM bitmap are set to 1, x is the AID of the device; andcontend for access to an access point in the slot of the RAW. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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receiving a beacon frame that includes a restricted access window parameter set (RPS) information element (IE) and a traffic indication map bitmap; determining a number of slots in the restricted access window (Nraw) based on the RPS IE; determining, based upon the mapping function, an association between a station and a slot in the restricted access window based upon a position of the station in the traffic indication map bitmap, wherein the mapping function comprises a position (x) of the station in a traffic indication bitmap, wherein x is a position index of an association identifier (AID) of the device if the RAW is restricted to stations whose AID bits in the TIM bitmap are set to 1;
wherein, if the RAW is not restricted to stations whose AID bits in the TIM bitmap are set to 1, x is the AID of the device; andcontending for access to an access point in the slot of the restricted access window. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wireless device comprising:
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a memory; circuitry coupled with the memory to; transmit, via a beacon frame, a restricted access window (RAW) parameter set (RPS) information element (IE) to a second wireless device to enable the second wireless device to determine a mapping function, the mapping function to map stations in a traffic indication map bitmap to slots in a RAW; wherein the second wireless station is to determine a number of slots in the restricted access window and an association between the second wireless station and a slot in the restricted access window based upon a position of the second wireless station in the traffic indication map bitmap; wherein the mapping function comprises a position (x) of the station in a traffic indication bitmap, wherein x is a position index of an association identifier (AID) of the device if the RAW is restricted to stations whose AID bits in the TIM bitmap are set to 1;
wherein, if the RAW is not restricted to stations whose AID bits in the TIM bitmap are set to 1, x is the AID of the device. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A system comprising:
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a processor, a radio, and one or more antennas; a memory; circuitry coupled with the memory to receive one or more frames comprising a traffic indication map bitmap;
determine a number of slots in a restricted access window;
determine, based upon a mapping function, an association between a station and a slot in the restricted access window based upon a position of the station in the traffic indication map bitmap, wherein the mapping function comprises the position of the station in the traffic indication bitmap, wherein the position of the station in the traffic indication bitmap is a position index of an association identifier (AID) of the device if the RAW is restricted to stations whose AID bits in the TIM bitmap are set to 1;
wherein, if the RAW is not restricted to stations whose AID bits in the TIM bitmap are set to 1, the position of the station in the traffic indication bitmap is the AID of the device; and
contend for access to an access point in the slot of the restricted access window; anda transmitter coupled with the medium access control logic and coupled with the one or more antennas to transmit a frame. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. At least one computer-readable non-transitory storage medium encoded with computer-accessible instructions that, in response to execution, cause at least one processor to perform operations comprising:
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receiving a beacon frame that includes a restricted access window parameter set (RPS) information element (IE); determining a number of slots in the restricted access window based upon the RPS IE; determining, based upon the mapping function, an association between a station and a slot in the restricted access window based upon a position of the station in the traffic indication map bitmap, wherein the mapping function comprises a position (x) of the station in a traffic indication bitmap, wherein x is a position index of an association identifier (AID) of the device if the RAW is restricted to stations whose AID bits in the TIM bitmap are set to 1;
wherein, if the RAW is not restricted to stations whose AID bits in the TIM bitmap are set to 1, x is the AID of the device; andcontending for access to an access point in the slot of the restricted access window. - View Dependent Claims (29, 30, 31, 32)
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Specification