# US 10,772,138 B2 · Wireless LAN system, wireless LAN base station, wireless LAN terminal, and communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,138 B2 - Document ID: US10772138B2 - Status: Granted - Kind: B2 - Application number: 16/331,214 - Filed: 2017-08-09 - Published: 2019-09-12 - Granted: 2020-09-08 - Earliest claimed: 2016-09-09 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Leonardo Lanante; Yuhei Nagao; Hiroshi Ochi - Web page: https://patentgrep.com/patent/US10772138B2 ## CPC - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 76/11: Allocation or use of connection identifiers - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 8/26: Network addressing or numbering for mobility support - H04W 72/12: Wireless traffic scheduling - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 76/15: Setup of multiple wireless link connections - H04W 84/12: WLAN [Wireless Local Area 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) ## Abstract A wireless LAN system according to the present disclosure includes a wireless LAN base station (AP), and a plurality of wireless LAN terminals (STA) which perform uplink multi-user communication with the wireless LAN base station (AP). An AID indicating an associated wireless LAN terminal (STA) includes a specific bit generated by using a BCB. The wireless LAN base station (AP) and an unassociated wireless LAN terminal (STA) generate a UAID which indicates the unassociated wireless LAN terminal (STA) to include the specific bit or a processed bit obtained by processing the specific bit, and use a bit to be distinguished from the AID as a bit other than the specific bit of the UAID when the specific bit is included in the UAID. ## Claims ### Claim 1 A communication method of a wireless local area network (LAN) base station configured to perform uplink multi-user communication with a plurality of wireless LAN terminals, wherein an association identifier (AID) indicating an associated wireless LAN terminal includes a specific bit generated by using a basic service set (BSS) color bit (BCB), and the communication method comprises: generating an unassociation identifier (UAID) indicating an unassociated wireless LAN terminal, in order to include the specific bit or a processed bit obtained by processing the specific bit; and using a bit to be distinguished from the AID as a bit other than the specific bit of the UAID in a case where the specific bit is included in the UAID. ### Claim 2 (depends on 1) The communication method according to claim 1, wherein the processed bit is a bit obtained by inverting the specific bit. ### Claim 3 (depends on 1) The communication method according to claim 1, wherein the processed bit is a bit obtained by adding a predetermined value to the specific bit, subtracting the predetermined value from the specific bit, multiplying the specific bit with the predetermined value, or dividing the specific bit by the predetermined value. ### Claim 4 (depends on 1) The communication method according to claim 1, wherein, in a case where the specific bit is included in the UAID, the bit other than the specific bit of the UAID is a bit of a value within a range different from a range of a value used by the AID. ### Claim 5 A communication method of a wireless local area network (LAN) base station configured to perform uplink multi-user communication with a plurality of wireless LAN terminals, the communication method comprising: transmitting a trigger frame to the plurality of wireless LAN terminals, the trigger frame including information and a base value, the information indicating a resource unit for random access, and the base value being a signaling parameter of an unassociation identifier (UAID) indicating an unassociated wireless LAN terminal; receiving uplink data from the unassociated wireless LAN terminal, the uplink data being transmitted by using the resource unit for random access indicated by the information included in the trigger frame; and generating the UAID by using the base value of the UAID and the information indicating the order of the resource unit for random access among resource units for random access, the resource unit for random access being used to transmit the uplink data. ### Claim 6 (depends on 5) The communication method according to claim 5, further comprising: calculating a new base value of the UAID by incrementing the base value of the UAID by a number of the resource units for random access indicated by the information included in the trigger frame; and generating a next trigger frame including the new base value of the UAID. ### Claim 7 (depends on 5) The communication method according to claim 5, further comprising not transmitting an acknowledgement (ACK) frame for uplink data to the unassociated wireless LAN terminal, the uplink data being received from the unassociated wireless LAN terminal designated by the conflicting UAID, in a case where the generated UAID conflicts. ### Claim 8 A communication method of a wireless local area network (LAN) terminal of a plurality of wireless LAN terminals configured to perform uplink multi-user communication with the wireless LAN base station, wherein an association identifier (AID) indicating an associated wireless LAN terminal includes a specific bit generated by using a basic service set (BSS) color bit (BCB), and the communication method comprises: generating an unassociation identifier (UAID) indicating the wireless LAN terminal, in order to include the specific bit or a processed bit obtained by processing the specific bit in a case where the wireless LAN terminal is an unassociated wireless LAN terminal; and using a bit to be distinguished from the AID as a bit other than the specific bit of the UAID in a case where the wireless LAN terminal is the unassociated wireless LAN terminal and the specific bit is included in the UAID. ### Claim 9 (depends on 8) The communication method according to claim 8, wherein the processed bit is a bit obtained by inverting the specific bit. ### Claim 10 (depends on 8) The communication method according to claim 8, wherein the processed bit is a bit obtained by adding a predetermined value to the specific bit, subtracting the predetermined value from the specific bit, multiplying the specific bit with the predetermined value, or dividing the specific bit by the predetermined value. ### Claim 11 (depends on 8) The communication method according to claim 8, wherein, in a case where the specific bit is included in the UAID, the bit other than the specific bit of the UAID is a bit of a value within a range different from a range of a value used by the AID. ### Claim 12 A communication method of a wireless local area network (LAN) terminal of a plurality of wireless LAN terminals configured to perform uplink multi-user communication with the wireless LAN base station, the communication method comprising: receiving a trigger frame from the wireless LAN base station, the trigger frame including information and a base value, the information indicating a resource unit for random access, and the base value being a signaling parameter of an unassociation identifier (UAID) indicating an unassociated wireless LAN terminal; generating the UAID indicating the wireless LAN terminal by using the base value of the UAID included in the trigger frame, and information indicating an order of a resource unit for random access among resource units for random access in a case where the wireless LAN terminal is the unassociated wireless LAN terminal, the resource unit for random access being indicated by the information included in the trigger frame; and transmitting uplink data to the wireless LAN base station by using the resource unit for random access indicated by the information included in the trigger frame in a case where the wireless LAN terminal is the unassociated wireless LAN terminal. ### Claim 13 (depends on 12) The communication method according to claim 12, further comprising performing uplink communication that does not need the UAID with the wireless LAN base station, in a case where the wireless LAN terminal is an unassociated wireless LAN terminal and the wireless LAN terminal does not receive the ACK frame from the wireless LAN base station after transmitting the uplink data to the wireless LAN base station.