CONTENTION ARBITRATION USING CODE DIVISION MULTIPLEXING
First Claim
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1. A method of controlling operation of a wireless network comprising an access point and a plurality of stations, comprising:
- transmitting a first message comprising a parameter indicative of a set of stations authorized to contend for an enhanced transmission opportunity (TXOP);
receiving a first number of contention requests having at least some overlap in time domain and frequency domain;
performing contention resolution of the first number of transmission requests using contention codes extracted from the first number of contention requests; and
transmitting, based on the contention resolution, a second message identifying stations allowed to transmit in the enhanced TXOP.
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Abstract
Access to a wireless medium is controlled based on contention arbitration. A certain number of wireless devices are allowed to contend for a transmission opportunity. Requests from these wireless devices are processed based on codes contained in the requests. Winning wireless devices are given access to the wireless medium by transmitting a contention arbitration message. In some implementation, codes in the request are selected from an orthogonal or pseudo orthogonal code set.
45 Citations
26 Claims
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1. A method of controlling operation of a wireless network comprising an access point and a plurality of stations, comprising:
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transmitting a first message comprising a parameter indicative of a set of stations authorized to contend for an enhanced transmission opportunity (TXOP); receiving a first number of contention requests having at least some overlap in time domain and frequency domain; performing contention resolution of the first number of transmission requests using contention codes extracted from the first number of contention requests; and transmitting, based on the contention resolution, a second message identifying stations allowed to transmit in the enhanced TXOP. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for controlling operation of a wireless network comprising an access point and a plurality of stations, comprising:
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transmission circuitry that transmits a first message comprising a parameter indicative of a set of stations authorized to contend for an enhanced transmission opportunity (TXOP); reception circuitry that receives a first number of contention requests having at least some overlap in a time domain and a frequency domain; a contention resolution module that performs contention resolution of the first number of transmission requests using contention codes extracted from the first number of contention requests; and wherein the transmission circuitry further transmits, based on the contention resolution, a second message identifying stations allowed to transmit in the enhanced TXOP. - View Dependent Claims (11, 12, 13, 14)
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15. A wireless communication method implemented at a wireless device, comprising:
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determining whether the wireless device is permitted to contend for an upcoming transmission opportunity (TXOP); transmitting, when permitted according to the determining, a contention request comprising a contention code; receiving a contention arbitration message in response to the contention request; determining whether a transmission opportunity was granted in the contention arbitration message; and transmitting data upon determination of grant of the transmission opportunity. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A wireless communication apparatus, comprising:
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a memory, a processor, a transmitter circuit and a receiver circuit, wherein the processor; reads instructions from the memory and determines whether the wireless device is permitted to contend for an upcoming transmission opportunity (TXOP); causes, when permitted, the transmitter circuit to transmit a contention request comprising a contention code; wherein the receiver circuit receives a contention arbitration message in response to the contention request; wherein the processor further determines whether a transmission opportunity was granted in the contention arbitration message; and wherein the transmitter circuit transmits data upon determination of grant of the transmission opportunity. - View Dependent Claims (23, 24, 25, 26)
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Specification