Method and wireless communication terminal for transmitting/receiving frame in wireless communication system
Disclosed is a method for transmitting a frame of a wireless communication system. A non-AP STA receives a beacon frame comprising a request type field from an AP and can receive a downlink frame or transmit an uplink frame in accordance with a specific field value included in the beacon frame. Here, the request type field comprises a specific field for indicating a target wake time (TWT) for a low latency operation, and, if the value of the specific field is set as a first specific value, a broadcast TWT service period (SP) is a TWT SP for the low latency operation.
1 . A non-access point station (non-AP STA) configured to operate in a wireless communication system, the non-AP STA comprising:
a communication module; and
a processor configured to control the communication module,
wherein the processor is configured to:
receive a management frame including a target wake time (TWT) element related to scheduling a restricted TWT service period (R-TWT SP) and a quiet element related to a quiet interval from an access point (AP),
wherein the R-TWT SP indicates a TWT SP in which transmission of a latency sensitive traffic is prioritized,
wherein the quiet interval indicates a duration in which no transmission occurs, and
wherein the TWT element includes a TWT request type field including a specific field indicating a type of a frame transmitted during the TWT SP, and
when the R-TWT SP is configured to the non-AP STA,
receive or transmit the latency sensitive traffic according to a first specific value of the specific field,
wherein the quiet interval is ignored based on whether the quiet interval overlaps with the R-TWT SP.
2 . The non-AP STA of claim 1 ,
wherein the quiet interval is ignored, and the latency sensitive traffic is transmitted or received according to the first specific value during the R-TWT SP when the quiet interval overlaps with the R-TWT SP.
3 . The non-AP STA of claim 1 ,
wherein the quiet interval is ignored based on a result of a comparison between a first time point of the R-TWT SP based on the TWT element and a second time point of the quiet interval based on the quiet element.
4 . The non-AP STA of claim 3 ,
wherein the first time point is a start time of the R-TWT SP, and
wherein the second time point is a start time of the quiet interval.
5 . The non-AP STA of claim 3 ,
wherein the quiet interval is ignored when the first time point and the second time point are the same.
6 . The non-AP STA of claim 3 ,
wherein non-AP STAs scheduled for quiet intervals by the AP set network allocation vectors (NAVs) for the quiet intervals.
7 . The non-AP STA of claim 6 ,
wherein the first specific value indicates that transmission of the latency sensitive traffic is prioritized during the R-TWT SP.
8 . The non-AP STA of claim 1 ,
wherein a second specific value of the specific field indicates that transmission of frames of a feedback type is prioritized during a specific TWT SP.
9 . The non-AP STA of claim 1 ,
wherein the TWT element further includes a TWT information field including information related to a TID for the latency sensitive traffic.
10 . The non-AP STA of claim 1 ,
wherein, when the non-AP STA is affiliated with a multi-link device (MLD), the MLD is unable to transmit, while receiving the management frame on a specific link, a frame on a link other than the specific link.
11 . The non-AP STA of claim 1 ,
wherein a transmission process by the non-AP STA ends before a start time of the R-TWT SP when the transmission process is performed before the R-TWT SP.
12 . A method of transmitting a frame by a non-access point station (non-AP STA) configured to operate in a wireless communication system, the method comprising:
receiving a management frame including a target wake time (TWT) element related to scheduling a restricted TWT service period (R-TWT SP) and a quiet element related to a quiet interval from an access point, AP,
wherein the R-TWT SP indicates a TWT SP in which transmission of a latency sensitive traffic is prioritized,
wherein the quiet interval indicates a duration in which no transmission occurs, and
wherein the TWT element includes a TWT request type field including a specific field indicating a type of a frame transmitted during the TWT SP; and
when the R-TWT SP is configured to the non-AP STA,
receiving or transmitting the latency sensitive traffic according to a first specific value of the specific field,
wherein the quiet interval is ignored based on whether the quiet interval overlaps with the R-TWT SP.
13 . The method of claim 12 ,
wherein the quiet interval is ignored, and the latency sensitive traffic is transmitted or received according to the first specific value during the R-TWT SP when the quiet interval overlaps with the R-TWT SP.
14 . The method of claim 12 ,
wherein the quiet interval is ignored based on a result of a comparison between a first time point of the R-TWT SP based on the TWT element and a second time point of the quiet interval based on the quiet element.
15 . The method of claim 14 ,
wherein the first time point is a start time of the R-TWT SP, and
wherein the second time point is a start time of the quiet interval.
16 . The method of claim 14 ,
wherein the quiet interval is ignored when the first time point and the second time point are the same.
17 . The method of claim 14 ,
wherein non-AP STAs scheduled for quiet intervals by the AP set network allocation vectors (NAVs) for the quiet intervals.
18 . The method of claim 17 ,
wherein the first specific value indicates that transmission of the latency sensitive traffic is prioritized during the R-TWT SP.
19 . The method of claim 12 ,
wherein a second specific value of the specific field indicates that transmission of frames of a feedback type is prioritized during a specific TWT SP.
20 . The method of claim 12 ,
wherein the TWT element further includes a TWT information field including information related to a TID for the latency sensitive traffic.
21 . The method of claim 12 ,
wherein, when the non-AP STA is affiliated with a multi-link device (MLD), the MLD is unable to transmit, while receiving the management frame on a specific link, a frame on a link other than the specific link.
22 . The method of claim 12 ,
wherein a transmission process by the non-AP STA ends before a start time of the R-TWT SP when the transmission process is performed before the R-TWT SP.