Channel access method in wireless LAN system
AssigneeKt Corporation
InventorsYang Seok Jeong, Joo Young Kim
Life of this patent
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Abstract
A channel access method in a wireless LAN system is disclosed. The channel access method for a terminal comprises the steps of: receiving a beacon transmitted from an access point; determining a channel access slot of a terminal allocated on the basis of the beacon; transmitting a data transmission request from the channel access slot to the access point; and receiving data transmission slot allocation information corresponding to the data transmission request from the access point. Thus, the present invention can reduce power consumption of the terminal.
Claims10
A method for a terminal in a wireless local area network, the method comprising:
- transmitting a first frame to an access point;
- and
- receiving, in response to the first frame, from the access point, a second frame including data transmission time information,
- wherein a PHY preamble of the second frame includes the data transmission time information,
- wherein the second frame is a Null Data Packet (NDP) type acknowledgement frame which includes the PHY preamble without a Data field,
- wherein the terminal is changed to power save mode when the second frame is received,
- wherein the terminal is changed to awake mode from the power save mode at a time indicated by the data transmission time information, and
- wherein the data transmission time information includes time information in which data is to be transmitted to the terminal within a data transmission interval.
A method for an access point in a wireless local area network, the method comprising:
- receiving a first frame from a terminal;
- and
- transmitting, in response to the first frame, to the terminal, a second frame including data transmission time information,
- wherein a PHY preamble of the second frame includes the data transmission time information,
- wherein the second frame is a Null Data Packet (NDP) type acknowledgement frame which includes the PHY preamble without a Data field,
- wherein the terminal is changed to power save mode when the second frame is received by the terminal,
- wherein the terminal is changed to awake mode from the power save mode at a time indicated by the data transmission time information, and
- wherein the data transmission time information includes time information in which data is to be transmitted to the terminal within a data transmission interval.
A terminal in a wireless local area network, the terminal comprising:
- a transceiver;
- and
- a processor,
- wherein the processor is configured to:
- cause the transceiver to transmit a first frame to an access point;
- and
- cause the transceiver to receive, in response to the first frame, from the access point, a second frame including data transmission time information,
- wherein a PHY preamble of the second frame includes the data transmission time information,
- wherein the second frame is a Null Data Packet (NDP) type acknowledgement frame which includes the PHY preamble without a Data field,
- wherein the terminal is changed to power save mode when the second frame is received,
- wherein the terminal is changed to awake mode from the power save mode at a time indicated by the data transmission time information, and
- wherein the data transmission time information includes time information in which data is to be transmitted to the terminal within a data transmission interval.
An access point in a wireless local area network, the access point comprising:
- a transceiver;
- and
- a processor,
- wherein the processor is configured to:
- cause the transceiver to receive a first frame from a terminal;
- and
- cause the transceiver to transmit, in response to the first frame, to the terminal, a second frame including data transmission time information,
- wherein a PHY preamble of the second frame includes the data transmission time information,
- wherein the second frame is a Null Data Packet (NDP) type acknowledgement frame which includes the PHY preamble without a Data field,
- wherein the terminal is changed to power save mode when the second frame is received by the terminal,
- wherein the terminal is changed to awake mode from the power save mode at a time indicated by the data transmission time information, and
- wherein the data transmission time information includes time information in which data is to be transmitted to the terminal within a data transmission interval.
Dependencies are inferred from the claim text.