# US 10,485,028 B2 · Method for supporting multi-BSS in wireless LAN system and device therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,485,028 B2 - Document ID: US10485028B2 - Status: Granted - Kind: B2 - Application number: 15/537,355 - Filed: 2016-10-04 - Published: 2017-12-28 - Granted: 2019-11-19 - Earliest claimed: 2015-10-02 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jeongki Kim; Kiseon Ryu; Jinyoung Chun; Jinsoo Choi; Suhwook Kim; Hangyu Cho - Web page: https://patentgrep.com/patent/US10485028B2 ## CPC - H04W 48/10: using broadcasted information - H04W 74/0816: with collision avoidance - H04L 69/323: in the physical layer [OSI layer 1] - H04W 16/02: Resource partitioning among network components, e.g. reuse partitioning - H04W 48/14: using user query {or user detection} - H04W 52/0219: {where the power saving management affects multiple terminals} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 74/00: Wireless channel access - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 84/12: WLAN [Wireless Local Area Networks] - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A method by which an access point (AP) supports multi-basic service sets (BSSs) in a wireless LAN system, according to one embodiment of the present invention, comprises the steps of: setting a plurality of BSS identifiers for each individual BSS belonging to the multi-BSSs; and transmitting a frame for notifying a station (STA) of the plurality of BSS identifiers set for each individual BSS, wherein the plurality of BSS identifiers include a first BSS identifier and a second BSS identifier, which has a length shorter than that of the first BSS identifier, and the first BSS identifier is set to different values for each individual BSS, but the second BSS identifier can be set to the same value for all of the multi-BSSs. ## Claims ### Claim 1 A method of supporting multiple basic service sets (BSSs) by an access point (AP) in a wireless local area network (LAN) system, the method comprising: based on a plurality of BSS identifiers related to the AP, transmitting a frame notifying a station (STA) of information on the plurality of BSS identifiers related to the AP, wherein the information on the plurality of BSS identifiers includes information on a BSS color being identical for the plurality of BSS identifier; and transmitting a physical layer protocol data unit (PPDU) comprising the information on the BSS color to a station (STA) associated with one of the plurality BSS identifiers as intra-BSS PPDU. ### Claim 2 (depends on 1) The method of claim 1, wherein the frame is a beacon frame or a probe response frame or an association response frame. ### Claim 3 (depends on 1) The method of claim 1, wherein the BSS color has a shorter length than each of the plurality of BSS identifiers. ### Claim 4 An access point (AP) relating to multiple basic service sets (BSSs) in a wireless local area network (LAN) system, the AP comprising: a transceiver; and a processor coupled with the transceiver and configured to: based on a plurality of BSS identifiers related to the AP, control the transceiver to transmit a frame notifying a station (STA) information on the plurality of BSS identifiers related to the AP, wherein the information on the plurality of BSS identifiers includes information on a BSS color being identical for the plurality of BSS identifiers, and control the transceiver to transmit a physical layer protocol data unit (PPDU) comprising the information on the BSS color to the STA associated with one of the plurality BSS identifiers as intra-BSS PPDU. ### Claim 5 A method of receiving, by a station (STA), a signal from an access point (AP) related to supporting multiple basic service sets (BSSs) in a wireless local area network (LAN) system, the method comprising: receiving, from the AP related to a plurality of BSS identifiers, a frame notifying information on the plurality of BSS identifiers related to the AP, wherein the information on the plurality of BSS identifiers includes information on a BSS color being identical for the plurality of BSS identifiers; receiving a physical layer protocol data unit (PPDU) comprising the information on the BSS color; and entering a doze state until an end of the PPDU based on a determination that the PPDU is an intra-BSS PPDU based on the BSS color and that the PPDU does not include a STA identifier of the STA. ### Claim 6 (depends on 5) The method of claim 5, wherein the frame is a beacon frame or a probe response frame. ### Claim 7 A station (STA) for receiving a signal from an access point (AP) related to supporting multiple basic service sets (BSSs) in a wireless local area network (LAN) system, the STA comprising: a transceiver; and a processor coupled with the transceiver and configured to: control the transceiver to receive, from the AP related to a plurality of BSS identifiers, a frame notifying information on the plurality of BSS identifiers related to the AP, wherein the information on the plurality of BSS identifiers includes information on a BSS color being identical for the plurality of BSS identifiers; control the transceiver to receive a physical layer protocol data unit (PPDU) comprising the information on the BSS color; and entering a doze state until an end of the PPDU based on a determination that the PPDU is an intra-BSS PPDU based on the BSS color and that the PPDU does not include a STA identifier of the STA.