Power saving method in wireless communication system
AssigneeElectronics and Telecommunications Research Institute
InventorsIl-Gu Lee, Sok-Kyu Lee, Hyun-Kyu Chung, Dae-Sik Kim
Life of this patent
Estimating the term…
Abstract
A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.
Claims20
A method of accessing a channel in a wireless local area network, comprising:
- receiving, by a destination station, a plurality of request to send (RTS) frames to update its network allocation vector from a source station over a first band;
- and
- transmitting, by the destination station, a clear to send (CTS) frame over a second band to the source station in response to the plurality of RTS frames,
- wherein the first band includes a plurality of first 20 MHz bands, each of the plurality of RTS frames corresponding to each of the plurality of first 20 MHz bands,
- wherein the second band includes at least one second 20 MHz band,
- wherein a number of the at least one second 20 MHz band is equal to or less than a number of the plurality of first 20 MHz bands, and
- wherein each of the plurality of RTS frames includes transmission mode information indicating an entire bandwidth of the plurality of first 20 MHz bands.
An apparatus of accessing a channel in a wireless local area network, the apparatus comprising:
- a transceiver circuitry;
- a controller coupled with the transceiver circuitry and configured to control the transceiver circuitry to:
- receive a plurality of request to send (RTS) frames to update its network allocation vector from a source station over a first band;
- and
- transmit a clear to send (CTS) frame over a second band to the source station in response to the plurality of RTS frames,
- wherein the first band includes a plurality of first 20 MHz bands, each of the plurality of RTS frames corresponding to each of the plurality of first 20 MHz bands,
- wherein the second band includes at least one second 20 MHz band,
- wherein a number of the at least one second 20 MHz band is equal to or less than a number of the plurality of first 20 MHz bands, and
- wherein each of the plurality of RTS frames includes transmission mode information indicating an entire bandwidth of the plurality of first 20 MHz bands.
A method of accessing a channel in a wireless local area network, comprising:
- transmitting, by a source station over a first band, a plurality of request to send (RTS) frames to a destination station to enable the destination station to update its network allocation vector;
- and
- receiving, by the source station, a clear to send (CTS) frame over a second band from the destination station in response to the plurality of RTS frames,
- wherein the first band includes a plurality of first 20 MHz bands, each of the plurality of RTS frames corresponding to each of the plurality of first 20 MHz bands,
- wherein the second band includes at least one second 20 MHz band,
- wherein a number of the at least one second 20 MHz band is equal to or less than a number of the plurality of first 20 MHz bands, and wherein each of the plurality of RTS frames includes transmission mode information indicating an entire bandwidth of the plurality of first 20 MHz bands.
An apparatus of accessing a channel in a wireless local area network, the apparatus comprising:
- a transceiver circuitry;
- a controller coupled with the transceiver circuitry and configured to control the transceiver to:
- transmit a plurality of request to send (RTS) frames to a destination station over a first band to enable the destination station to update its network allocation vector;
- and
- receiving a clear to send (CTS) frame over a second band from the source station in response to the plurality of RTS frames,
- wherein the first band includes a plurality of first 20 MHz bands, each of the plurality of RTS frames corresponding to each of the plurality of first 20 MHz bands,
- wherein the second band includes at least one second 20 MHz band,
- wherein a number of the at least one second 20 MHz band is equal to or less than a number of the plurality of first 20 MHz bands, and
- wherein each of the plurality of RTS frames includes transmission mode information indicating an entire bandwidth of the plurality of first 20 MHz bands.
Dependencies are inferred from the claim text.