Method and apparatus for accessing channel in WLAN system
First Claim
1. A method for controlling channel access by an access point (AP) of a wireless communication system, comprising:
- transmitting, to a station (STA), a first frame containing a traffic indication map (TIM) element and a restricted access window parameter set (RPS) element;
wherein a restricted access window (RAW) allowing channel access of the STA is determined based on the RPS element; and
receiving a second frame from the STA within the determined RAW,wherein;
the RAW comprises at least one slot; and
the RPS element comprises at least one RAW assignment field, each of the at least one RAW assignment field comprising a first field indicating a slot duration and a second field indicating whether or not the channel is only accessed by paged STAs, andwherein an index of a slot assigned to the STA is determined based on an association identifier (AID) of the STA and the number of slots in the RAW,wherein the index of the slot is determined based on a position index of an AID bit in the TIM element when the second field indicates that the channel is only accessed by the paged STAs.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for accessing a channel in a WLAN system. The method for accessing a channel from a station (STA) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving from an access point (AP) a first frame including a traffic indication map (TIM) and a restricted access window (RAW) parameter set component; determining a RAW in which channel access of the STA is permitted, on the basis of the RAW parameter set (RPS) component; and transmitting a second frame to the AP from within the RAW that is determined, wherein the RAW includes at least one slot, the RPS component includes at least one RAW allocation field, each of the at least one RAW allocation field includes a RAW duration field and a slot duration field, and wherein an index of a slot which is allocated to the STA can be determined on the basis of an association identifier (AID) of the STA and the number of the slots in the RAW.
-
Citations
13 Claims
-
1. A method for controlling channel access by an access point (AP) of a wireless communication system, comprising:
-
transmitting, to a station (STA), a first frame containing a traffic indication map (TIM) element and a restricted access window parameter set (RPS) element; wherein a restricted access window (RAW) allowing channel access of the STA is determined based on the RPS element; and receiving a second frame from the STA within the determined RAW, wherein; the RAW comprises at least one slot; and the RPS element comprises at least one RAW assignment field, each of the at least one RAW assignment field comprising a first field indicating a slot duration and a second field indicating whether or not the channel is only accessed by paged STAs, and wherein an index of a slot assigned to the STA is determined based on an association identifier (AID) of the STA and the number of slots in the RAW, wherein the index of the slot is determined based on a position index of an AID bit in the TIM element when the second field indicates that the channel is only accessed by the paged STAs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An access point (AP) for controlling channel access in a wireless communication system, comprising:
-
a transceiver; and a processor that; controls the transceiver to transmit, to a station (STA), a first frame containing a traffic indication map (TIM) element and a restricted access window parameter set (RPS) element; wherein a restricted access window (RAW) allowing channel access of the STA is determined based on the RPS element; and controls the transceiver to receive a second frame from the STA within the determined RAW, wherein; the RAW comprises at least one slot; and the RPS element comprises at least one RAW assignment field, each of the at least one RAW assignment field comprising a first field indicating a slot duration and a second field indicating whether or not the channel is only accessed by paged STAs; and wherein an index of a slot assigned to the STA is determined based on an association identifier (AID) of the STA and the number of slots in the RAW, wherein the index of the slot is determined based on a position index of an AID bit in the TIM element when the second field indicates that the channel is only accessed by the paged STAs.
-
Specification