# US 12,772,169 B2 · Wireless communication method and wireless communication terminal using wake-up radio > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,772,169 B2 - Document ID: US12772169B2 - Status: Granted - Kind: B2 - Application number: 18/769,756 - Filed: 2024-07-11 - Published: 2024-10-31 - Granted: 2026-10-20 - Earliest claimed: 2017-10-27 - Assignees: Wilus Institute of Standards and Technology Inc. - Applicants: Wilus Institute of Standards and Technology Inc. - Inventors: Woojin Ahn; Juhyung Son; Jinsam Kwak - Web page: https://patentgrep.com/patent/US12772169B2 ## CPC - H04W 52/0229: {where the received signal is a wanted signal} - H04W 12/06: Authentication - H04W 52/0235: {where the received signal is a power saving command} - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 80/02: Data link layer protocols - 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) ## Abstract Disclosed is a wireless communication terminal to communicate wirelessly. The wireless communication terminal includes: a first wireless transceiver configured to transmit and receive signals modulated by a first modulation method; a second wireless receiver configured to receive a signal modulated by a second modulation method different from the first modulation method; and a processor. The processor is configured to sequentially receive a plurality of fields of a wake-up radio (WUR) frame included in a WUR physical layer processing data unit (PPDU) transmitted by the second modulation method, and when a predetermined condition for the plurality of fields is satisfied, stop receiving the WUR frame without determining whether values of the plurality of fields are valid. ## Claims ### Claim 1 A wireless communication terminal to communicate wirelessly, the wireless communication terminal comprising: a first wireless transceiver configured to transmit and receive signals modulated by a first modulation method; a second wireless receiver configured to receive a signal modulated by a second modulation method which is different from the first modulation method; and a processor, wherein the processor is configured to: sequentially receive a plurality of fields of a wake-up radio (WUR) frame included in a WUR physical layer protocol data unit (PPDU) transmitted by the second modulation method, and when one or more predetermined conditions for the plurality of fields are satisfied, stop receiving the WUR frame without determining whether values of the plurality of fields are valid, wherein the one or more predetermined conditions comprise a case where the wireless communication terminal is not an intended recipient of the WUR frame, and wherein the plurality of fields comprises a plurality of reception terminal fields which are arranged in the WUR frame according to an increasing order of a value of an identifier of the wireless communication terminal indicated by each of the plurality of reception terminal fields, and wherein the wireless communication terminal determines that the wireless communication terminal is not the intended recipient of the WUR frame when the wireless communication terminal finds a reception terminal field which has a value greater than a value of an identifier of the wireless communication terminal before obtaining a reception terminal field corresponding to the wireless communication terminal. ### Claim 2 (depends on 1) The wireless communication terminal of claim 1, wherein the processor is configured to determine whether the wireless communication terminal is not the intended recipient of the WUR frame based on whether the WUR frame does not indicate an identifier of a group including the wireless communication terminal as the recipient of the WUR frame. ### Claim 3 (depends on 1) The wireless communication terminal of claim 1, wherein when it is necessary to determine whether any one of the plurality of fields is valid even if the wireless communication terminal is not the intended recipient of the WUR frame, the processor is configured not to stop receiving the WUR frame. ### Claim 4 (depends on 1) The wireless communication terminal of claim 1, wherein the one or more predetermined conditions comprise a case where the wireless communication terminal does not support a reception of the WUR frame. ### Claim 5 (depends on 4) The wireless communication terminal of claim 4, wherein when the WUR frame has a length not supported by the wireless communication terminal, the processor is configured to determine that the wireless communication terminal does not support a reception of the WUR frame. ### Claim 6 (depends on 4) The wireless communication terminal of claim 4, wherein when the WUR frame is a type not supported by the wireless communication terminal, the processor is configured to determine that the wireless communication terminal does not support a reception of the WUR frame. ### Claim 7 (depends on 4) The wireless communication terminal of claim 4, wherein when the WUR frame indicates a protocol not supported by the wireless communication terminal, the processor is configured to determine that the wireless communication terminal does not support a reception of the WUR frame. ### Claim 8 (depends on 1) The wireless communication terminal of claim 1, wherein when the one or more predetermined conditions for the plurality of fields are satisfied, the processor is configured to stop receiving the WUR frame without determining whether values of the plurality of fields of the WUR frame are valid through a frame check sequence (FCS) value generated based on the values of the plurality of fields. ### Claim 9 (depends on 1) The wireless communication terminal of claim 1, wherein the processor is configured to stop receiving a radio signal modulated according to the second modulation method, and stops receiving the WUR frame by transmitting a command for requesting to restart clear channel assessment (CCA) from a medium access control (MAC) layer to a physical layer. ### Claim 10 A method of operating a wireless communication terminal for wirelessly transmitting and receiving a signal modulated by a first modulation method, and receiving a signal modulated by a second modulation method which is different from the first modulation method, the method comprising: sequentially receiving a plurality of fields of a wake-up radio (WUR) frame included in a WUR physical layer protocol data unit (PPDU) transmitted by the second modulation method, and when one or more predetermined conditions for the plurality of fields are satisfied, stopping receiving the WUR frame without determining whether values of the plurality of fields are valid, wherein the one or more predetermined conditions comprise a case where the wireless communication terminal is not an intended recipient of the WUR frame, and wherein the plurality of fields comprises a plurality of reception terminal fields which are arranged in the WUR frame according to an increasing order of a value of an identifier of the wireless communication terminal indicated by each of the plurality of reception terminal fields, and wherein the wireless communication terminal determines that the wireless communication terminal is not the intended recipient of the WUR frame when the wireless communication terminal finds a reception terminal field which has a value greater than a value of an identifier of the wireless communication terminal before obtaining a reception terminal field corresponding to the wireless communication terminal. ### Claim 11 (depends on 10) The method of claim 10, wherein the stopping the receiving the WUR frame comprises determining whether the wireless communication terminal is not the intended recipient of the WUR frame based on whether the WUR frame does not indicate an identifier of a group including the wireless communication terminal as the recipient of the WUR frame. ### Claim 12 (depends on 10) The method of claim 10, wherein the stopping the receiving the WUR frame comprises not stopping receiving the WUR frame when it is necessary to determine whether any one of the plurality of fields is valid even if the wireless communication terminal is not the intended recipient of the WUR frame. ### Claim 13 (depends on 10) The method of claim 10, wherein the one or more predetermined conditions comprise a case where the wireless communication terminal does not support a reception of the WUR frame.