Technique for performing multi-link communication in wireless communication system
According to various embodiments, a multi-link device (MLD) operating in a plurality of links may receive information regarding a plurality of groups into which the plurality of links are classified. The information regarding the plurality of groups may include information regarding IDs allocated to the plurality of groups and information regarding power saving (PS) intervals allocated to the plurality of groups. The multi-link device may change, on the basis of the information regarding the plurality of groups, at least one STA included in the multi-link device to be in a doze state.
1 . A method performed by a multi-link device (MLD) comprising:
transmitting, by a station (STA) affiliated with the MLD related to a plurality of links including a first link and a second link, an Association Request frame that includes a first information field related to whether the MLD supports a simultaneous transmit and receive operation, a second information field related to an available traffic identifier (TID) in at least one of the first link and the second link, and a third information field related to a maximum number of links supported by the MLD;
receiving, by the STA, a physical layer protocol unit (PPDU) based on the Association Request frame,
wherein the PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field being contiguous to the L-SIG field, and a first signal (SIG) field being contiguous to the RL-SIG field,
wherein the L-SIG field includes a length field, and the length field has a value of satisfying a condition that a remainder is zero (0) when the value of the length field is divided by three (3), and
wherein the first SIG field includes first bit information related to a PPDU type, second bit information related to an identifier of a basic service set (BSS), third bit information indicating duration information related to a transmission opportunity (TXOP), fourth bit information related to whether the PPDU is sent in uplink (UL) or in downlink (DL), fifth bit information related to a bandwidth, and sixth bit information having a length of 3 bits and indicating a physical (PHY) version of the PPDU,
wherein the plurality of links are classified into a plurality of groups, and
wherein the PPDU includes first information related to a group identifier (ID) assigned to the plurality of groups and second information related to a power saving (PS) period assigned to the plurality of groups; and
changing, by the STA, a power state of at least one of the plurality of links to a doze state, based on the first information and the second information.
2 . The method of claim 1 , wherein the plurality of links are classified based on whether it is an anchored link.
3 . The method of claim 1 , wherein the PPDU further includes traffic information related to the plurality of links.
4 . The method of claim 3 , wherein the traffic information for the plurality of links includes traffic indication map (TIM) information.
5 . A multi-link device (MLD), comprising
at least one processor supporting a plurality of links including a first link and a second link; and
at least one computer memory operatively connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
transmitting, by a station (STA) affiliated with the MLD, an Association Request frame that includes a first information field related to whether the MLD supports a simultaneous transmit and receive operation, a second information field related to an available traffic identifier (TID) in at least one of the first link and the second link, and a third information field related to a maximum number of links supported by the MLD;
receiving a physical layer protocol unit (PPDU) based on the Association Request frame,
wherein the PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field being contiguous to the L-SIG field, and a first signal (SIG) field being contiguous to the RL-SIG field,
wherein the L-SIG field includes a length field, and the length field has a value of satisfying a condition that a remainder is zero (0) when the value of the length field is divided by three (3), and
wherein the first SIG field includes first bit information related to a PPDU type, second bit information related to an identifier of a basic service set (BSS), third bit information indicating duration information related to a transmission opportunity (TXOP), fourth bit information related to whether the PPDU is sent in uplink (UL) or in downlink (DL), fifth bit information related to a bandwidth, and sixth bit information having a length of 3 bits and indicating a physical (PHY) version of the PPDU,
wherein the plurality of links are classified into a plurality of groups, and
wherein the PPDU includes first information related to a group identifier (ID) assigned to the plurality of groups and second information related to a power saving (PS) period assigned to the plurality of groups; and
changing a power state of at least one of the plurality of links to a doze state based on the first information and the second information.
6 . The device of claim 5 , wherein the plurality of links are classified based on whether it is an anchored link.
7 . The device of claim 5 , wherein the PPDU further includes traffic information related to the plurality of links.
8 . The device of claim 7 , wherein the traffic information for the plurality of links includes traffic indication map (TIM) information.