Intra-PDDU power saving in WLAN
A method and an apparatus for a station (STA) to save power in a wireless local area network (WLAN) are provided. For this, the STA receives a MU PPDU (Multi-User Physical Protocol Data unit) comprising A-MPDU (Aggregated MAC Protocol Data Unit) from an AP (Access Point). The STA enters into a doze state until an end of the MU PPDU, when a receiver address of the A-MPDU is equal to the STA's address, and there is an indication indicating a start of EOF (End-Of-Frame) padding.
1. A method for a station (STA) in a wireless local area network (WLAN), the method comprising:
receiving a Multi-User Physical layer Protocol Data Unit (MU-PPDU);
determining whether to enter a doze state based on whether a reception vector parameter in the MU-PPDU is a Basic Service Set (BSS) color of a BSS associated with the STA and the MU-PPDU is not intended for the STA;
determining whether to enter a doze state based on whether a receiver address (RA) field of an Aggregated-Medium access control layer Protocol Data Unit (A-MPDU) included in the MU-PPDU is an address of the STA, an uplink (UL) flag of the MU-PPDU is set to zero, and the MU-PPDU includes an End-Of-Frame (EOF) padding,
wherein the UL flag of the MU-PPDU is set to zero when the MU-PPDU is used for downlink (DL) transmission;
entering the doze state until an end of the MU-PPDU when the reception vector parameter is the BSS color and the MU-PPDU is not intended for the STA; and
entering the doze state until an end of the MU-PPDU when the RA is the address of the STA, the UL flag of the MU-PPDU is set to zero, and the MU-PPDU includes the EOF padding.
2. The method of claim 1 , wherein when MU-PPDU is not intended for the STA, the reception vector parameter (STA_ID_LIST) does not include an identifier of the STA or a broadcast identifier intended for the STA.
3. The method of claim 1 , wherein the EOF padding includes an A-MPDU delimeter with an EOF equal to 1 and an MPDU length field equal to 0.
4. The method of claim 1 , wherein the MU PPDU comprises a plurality of data fields received based on a plurality of frequency resource units, a signal field including allocation information of the frequency resource units, and user identification information of the frequency resource units.
5. A station (STA) in a wireless local area network (WLAN), the STA comprising:
a transceiver;
a memory; and
a processor, operatively coupled to the transceiver and the memory,
wherein the processor is configured to:
control the transceiver to receive a Multi User-Physical layer Protocol Data Unit (MU-PPDU);
determine whether to enter a doze state based on whether a reception vector parameter in the MU-PPDU is a Basic Service Set (BSS) color of a BSS associated with the STA and the MU-PPDU is not intended for the STA;
determine whether to enter the doze state based on whether a receiver address (RA) field of an Aggregated-Medium access control layer Protocol Data Unit (A-MPDU) included in the MU-PPDU is an address of the STA, an uplink (UL) flag of the MU-PPDU is set to zero, and the MU-PPDU includes an End-Of-Frame (EOF) padding,
wherein the UL flag of the MU-PPDU is set to zero when the MU-PPDU is used for downlink (DL) transmission;
enter the doze state until an end of the MU-PPDU when the reception vector parameter is the BSS color and the MU-PPDU is not intended for the STA; and
enter the doze state until the end of the MU-PPDU when the RA is the address of the STA, the UL flag of the MU-PPDU is set to zero, and the MU-PPDU includes the EOF padding.
6. The STA of claim 5 , wherein when MU-PPDU is not intended for the STA, the reception vector parameter (STA_ID_LIST) does not include an identifier of the STA or a broadcast identifier intended for the STA.
7. The STA of claim 5 , wherein the EOF padding includes an A-MPDU delimeter with an EOF equal to 1 and an MPDU length field equal to 0.
8. The STA of claim 5 , wherein the MU PPDU comprises a plurality of data fields received based on a plurality of frequency resource units, a signal field including allocation information of the frequency resource units, and user identification information of the frequency resource units.