Method for performing paging in wireless LAN system and device using same
Provided are a method and a device for performing paging in a wireless LAN system. Specifically, during a preset discovery window, a paging group information message comprising a paging group ID and a paging offset is received, the paging group ID indicating at least one receiving station receiving a paging message, and the paging offset indicating the transmission time of the paging message. The paging message is received according to the paging offset, wherein the paging message comprises: a paging ID indicating a receiving station transmitting a PS-poll frame; and a PS-poll offset indicating the PS-poll frame transmission time. The PS-poll frame is transmitted according to the PS-poll offset.
1. A method for performing paging by a receiving station (STA) in a wireless LAN system, comprising:
receiving a paging group information message including a paging group ID for at least one receiving STA receiving a paging message and a paging offset for transmission time of the paging message during a preset discovery window;
receiving the paging message based on the paging offset of the received paging group information message,
wherein the paging message includes a paging ID for a receiving STA transmitting a PS (Power Save)-poll frame and a PS-poll offset for transmission time of the PS-poll frame; and
transmitting the PS-poll frame based on the PS-poll offset,
wherein the paging group information message further includes multi-channel information,
wherein the multi-channel information includes information on a first channel and a second channel,
wherein the paging group information message is received through the first channel,
wherein the paging message is received through the second channel, and
wherein the PS-poll frame is transmitted through the second channel.
2. The method of claim 1 , wherein when the paging message is received through the first channel, the paging message further includes the multi-channel information.
3. The method of claim 1 , further comprising:
entering an awake state to receive a control signal during the preset discovery window.
4. The method of claim 1 , further comprising:
entering a doze state after the preset discovery window until the paging message is received.
5. The method of claim 1 , further comprising:
entering a doze state after the paging message is received until the PS-poll frame is transmitted.
6. The method of claim 1 , wherein the paging message further includes the paging group ID.
7. The method of claim 1 , wherein the paging ID is included in the paging message when there is buffered traffic for the receiving STA.
8. The method of claim 1 , wherein the paging group ID is assigned through a service discovery frame during an association and authentication procedure.
9. A wireless device operating in a WLAN system, comprising:
a transceiver; and
a processor, operatively coupled to the transceiver,
wherein the processor is configured to:
receive a paging group information message including a paging group ID for at least one receiving STA receiving a paging message and a paging offset for transmission time of the paging message during a preset discovery window;
receive the paging message based on the paging offset of the received paging group information message, wherein the paging message includes a paging ID for a receiving STA transmitting a PS (Power Save)-poll frame and a PS-poll offset indicating transmission time of the PS-poll frame; and
transmit the PS-poll frame based on the PS-poll offset,
wherein the paging group information message further includes multi-channel information,
wherein the multi-channel information includes information on a first channel and a second channel,
wherein the paging group information message is received through the first channel,
wherein the paging message is received through the second channel, and
wherein the PS-poll frame is transmitted through the second channel.
10. The wireless device of claim 9 , wherein when the paging message is received through the first channel, the paging message further includes the multi-channel information.
11. The wireless device of claim 9 , wherein the paging ID is included in the paging message when there is buffered traffic for the receiving STA.