# US 12,192,148 B2 · Wireless communication method using trigger information, and wireless communication terminal using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,148 B2 - Document ID: US12192148B2 - Status: Granted - Kind: B2 - Application number: 18/244,198 - Filed: 2023-09-08 - Published: 2023-12-28 - Granted: 2025-01-07 - Earliest claimed: 2016-07-06 - Assignees: Wilus Institute of Standards and Technology Inc.; SK Telecom Co., Ltd. - Applicants: Wilus Institute of Standards and Technology Inc.; SK Telecom Co., Ltd. - Inventors: Woojin Ahn; Juhyung Son; Geonjung Ko; Jinsam Kwak - Web page: https://patentgrep.com/patent/US12192148B2 ## CPC - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 28/065: {using assembly or disassembly of packets} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0058: {Allocation criteria} - H04W 74/00: Wireless channel access - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 84/12: WLAN [Wireless Local Area Networks] - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a wireless communication terminal that communicates wirelessly. The wireless communication terminal includes: a transceiver; and a processor. The processor receiving trigger information from a base wireless communication terminal using the transceiver, and transmits an Aggregate-MAC Protocol Data Unit (A-MPDU) to the base wireless communication terminal based on the trigger information. ## Claims ### Claim 1 A wireless communication terminal communicating wirelessly, the wireless communication terminal comprising: a transceiver; and a processor, wherein the processor is configured to: receive trigger information from a base wireless communication terminal using the transceiver, wherein the trigger information triggers a transmission of a trigger-based physical layer protocol data unit (PPDU) by the wireless communication terminal, wherein when the trigger information is included in a trigger frame, the trigger frame comprises a traffic identifier (TID} Aggregation Limit field in a User Info field corresponding to the wireless communication terminal, wherein the TID Aggregation Limit field indicates whether aggregating one or more MAC Protocol Data Unit (MPDUs) requesting an immediate response to generate an Aggregate-MAC Protocol Data Unit (A-MPDU) is allowed and indicates a maximum number of TIDs that is allowed to be aggregated in the A-MPDU when the wireless communication terminal generates the A-MPDU, when a value of the TID Aggregation Limit field is a predetermined value, generate the A-MPDU not to include one or more MPDUs requesting an immediate response, wherein the predetermined value is 0, when the value of the TID Aggregation Limit field is within a predetermined range, generate the A-MPDU according to the maximum number of TIDs, and transmit the trigger-based PPDU including the A-MPDU to the base wireless communication terminal. ### Claim 2 (depends on 1) The wireless communication terminal of claim 1, wherein the wireless communication terminal is allowed to aggregate one or more MPDUs not requesting an immediate response regardless of the maximum number of TIDs. ### Claim 3 (depends on 2) The wireless communication terminal of claim 2, wherein the one or more MPDUs not requesting an immediate response comprises a Quality of Service (QOS) Null frame not requesting an ACK for the QoS Null frame. ### Claim 4 (depends on 2) The wireless communication terminal of claim 2, wherein the one or more MPDUs not requesting an immediate response comprises an Action No Ack frame not requesting an ACK for the Action No Ack frame. ### Claim 5 (depends on 1) The wireless communication terminal of claim 1, wherein when the value of the TID Aggregation Limit field is within the predetermined range, the processor is configured to aggregate one or more action frames regardless of a maximum number of TIDs that is allowed to be aggregated in the A-MPDU when the wireless communication terminal generates the A-MPDU. ### Claim 6 (depends on 1) The wireless communication terminal of claim 1, wherein when the trigger information is included in a MAC header, the processor is configured to generate the A-MPDU not to include one or more MPDUs requesting an immediate response. ### Claim 7 (depends on 6) The wireless communication terminal of claim 6, wherein when the trigger information is included in the MAC header, the processor is configured to aggregate any one of an ACK frame and a Block ACK (BA) frame, with one or more MPDUs not requesting an immediate response, without one or more MPDUs requesting an immediate response to generate the A-MPDU. ### Claim 8 (depends on 7) The wireless communication terminal of claim 7, wherein the one or more MPDUs not requesting an immediate response comprises at least one of a QoS Null frame not requesting an ACK for the QoS Null frame and an Action No Ack frame not requesting an ACK for the Action No Ack frame. ### Claim 9 A base wireless communication terminal communicating wirelessly, the base wireless communication terminal comprising: a transceiver; and a processor, wherein the processor is configured to: generate trigger information to a plurality of wireless communication terminals using the transceiver, wherein the trigger information triggers a transmission of a trigger-based physical layer protocol data unit (PPDU) by each of the plurality of wireless communication terminals and is included in a trigger frame which includes a traffic identifier (TID) Aggregation Limit field in a User Info field, wherein the TID Aggregation Limit field indicates whether aggregating one or more MPDUs requesting an immediate response to generate an Aggregate-MAC Protocol Data Unit (A-MPDU) is allowed and indicates a maximum number of TIDs that is allowed to be aggregated in the A-MPDU when the A-MPDU is generated, when a wireless communication terminal corresponding to the User Info field is not allowed to aggregate one or more MPDUs requesting an immediate response to generate the A-MPDU, set a value of the TID Aggregation Limit field to a predetermined value, wherein the predetermined value is 0, when the wireless communication terminal corresponding to the User Info field is allowed to aggregate one or more MPDUs requesting an immediate response to generate the A-MPDU, set the value of the TID Aggregation Limit field according to the maximum number of TIDS, transmit the trigger frame, and receive the trigger-based PPDU including the A-MPDU from at least one of the plurality of wireless communication terminals, wherein one or more MPDUs requesting an immediate response are aggregated or not, based on the TID Aggregation Limit field, in the A-MPDU. ### Claim 10 (depends on 9) The base wireless communication terminal of claim 9, wherein the maximum number of TIDs indicates a maximum number of TIDs requesting an immediate response that is allowed to be aggregated in the A-MPDU. ### Claim 11 (depends on 9) The base wireless communication terminal of claim 9, wherein one or more Quality of Service (QOS) null frames not requesting an ACK for the QoS null frames are aggregated in the A-MPDU regardless of the maximum number of TIDs. ### Claim 12 (depends on 9) The base wireless communication terminal of claim 9, wherein the trigger frame comprises a channel sensing (CS) required field indicating whether channel sensing is required when a wireless communication terminal transmits a response to the trigger information through trigger-based Physical Layer Protocol Data Unit (PPDU), wherein the processor is configured to set the value of the TID Aggregation Limit field based on the value of the CS required field. ### Claim 13 (depends on 12) The base wireless communication terminal of claim 12, wherein when the CS required field is set to indicate that channel sensing is not required when the wireless communication terminal transmitting the response to the trigger information transmits the trigger-based PPDU, the processor is configured to set the value of the TID Aggregation Limit field to the predetermined value. ### Claim 14 (depends on 13) The base wireless communication terminal of claim 13, wherein the trigger frame comprises a length field indicating information on a length of the trigger-based PPDU, wherein the processor is configured to set the value of the TID Aggregation Limit field based on a value of the length field.