Method and apparatus for accessing channels in wireless LAN system
AssigneeLG Electronics Inc.
InventorsJeongki Kim, Yongho Seok, Jinsam Kwak, Jinsoo Choi
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Abstract
The present invention relates to a wireless communication system, and more specifically, to a method and apparatus for accessing channels in a wireless LAN system. The method for accessing channels in a station (STA) of the wireless communication system according to one embodiment of the present invention comprises the steps of transmitting a first frame of a channel access request to an access point (AP); and receiving, from the AP, a second frame related to whether access to the channel is allowed in response to the first frame, wherein the second frame can include a value for a channel access start offset with respect to the STA.
Claims13
A method of performing channel access at a specific station (STA) in a wireless communication system, the method comprising:
- receiving, at the specific STA, a beacon frame including information on a channel access interval assigned to each group of stations, wherein the specific STA is allowed to access a channel within a channel access interval assigned to a specific station group including the specific STA;
- transmitting, at the specific STA, a power save (PS)-Poll frame to an access point (AP);
- receiving, at the specific STA from the AP, a response frame in response to the PS-Poll frame, the response frame including a channel access start offset value for the specific STA, and
- determining a channel access interval for the specific STA based on the channel access start offset value included in the response frame.
A method of supporting channel access of a station (STA) in an access point (AP) of a wireless communication system, the method comprising:
- transmitting a beacon frame including information on a channel access interval assigned to each group of stations, wherein a specific STA is allowed to access a channel within a channel access interval assigned to a specific station group including the specific STA;
- receiving a power save (PS)-Poll frame from the specific STA;
- and
- transmitting, to the specific STA, a response frame in response to the PS-Poll frame, the response frame including a value of a channel access start offset value for the specific STA, wherein the specific STA uses the channel access start offset value to determine a channel access interval for the specific STA.
A station (STA) apparatus for performing channel access in a wireless communication system, the STA apparatus comprising:
- a transceiver;
- and
- a processor,
- wherein the processor is configured to control the transceiver to:
- receive a beacon frame including information on a channel access interval assigned to each group of stations, transmit a power save (PS)-Poll frame to an access point (AP) and receive, from the AP, a response frame in response to the PS-Poll frame, the response frame including a value of a channel access start offset value for the STA, and
- wherein the processor is further configured to determine a channel access interval for the STA based on the channel access start offset value included in the response frame.
An access point (AP) apparatus for supporting channel access of a station (STA) in a wireless communication system, the AP apparatus comprising:
- a transceiver;
- and
- a processor, configured to control the transceiver to:
- transmit a beacon frame including information on a channel access interval assigned to each group of stations, receive a power save (PS)-Poll frame from a specific STA and transmit, to the specific STA, a response frame in response to the PS-Poll frame, the response frame including a value of a channel access start offset for the specific STA, and wherein the specific STA uses the channel access start offset value to determine a channel access interval for the specific STA.
Dependencies are inferred from the claim text.