# US 2020/0288397 A1 · 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 2020/0288397 A1 - Document ID: US20200288397A1 - Status: Published application - Kind: A1 - Application number: 16/759,320 - Filed: 2018-10-29 - Published: 2020-09-10 - 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/US20200288397A1 ## CPC - H04W 52/0229: {where the received signal is a wanted signal} - H04W 12/06: Authentication - H04W 12/69: Identity-dependent - H04W 52/02: Power saving arrangements - 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 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - H04W 48/16: Discovering, processing access restriction or access information - 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) - 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 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 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 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 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. ### Claim 2 (depends on 1) The wireless communication terminal of claim 1, wherein the predetermined condition comprises a case where the wireless communication terminal is not an intended recipient of the WUR frame. ### Claim 3 (depends on 2) The wireless communication terminal of claim 2, 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 the wireless communication terminal as the recipient of the WUR frame. ### Claim 4 (depends on 3) The wireless communication terminal of claim 3, wherein the plurality of fields of the WUR frame comprise a plurality of reception terminal fields indicating a wireless communication terminal to receive the WUR frame, and the plurality of reception terminal fields are located in the WUR frame based on the order of the size of the value of the identifier of the wireless communication terminal indicated by each of the plurality of reception terminal fields, wherein the processor is configured to compare the value of the received reception terminal field with the value of the identifier of the wireless communication terminal and determine whether the wireless communication terminal is not the intended recipient of the WUR frame based on a result of the comparison. ### Claim 5 (depends on 2) The wireless communication terminal of claim 2, 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 6 (depends on 2) The wireless communication terminal of claim 2, 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 7 (depends on 1) The wireless communication terminal of claim 1, wherein the predetermined condition comprises a case where the wireless communication terminal does not support the reception of the WUR frame. ### Claim 8 (depends on 7) The wireless communication terminal of claim 7, 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 the reception of the WUR frame. ### Claim 9 (depends on 7) The wireless communication terminal of claim 7, 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 the reception of the WUR frame. ### Claim 10 (depends on 7) The wireless communication terminal of claim 7, 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 the reception of the WUR frame. ### Claim 11 (depends on 7) The wireless communication terminal of claim 7, 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 the reception of the WUR frame. ### Claim 12 (depends on 1) The wireless communication terminal of claim 1, wherein when the predetermined condition for the plurality of fields is satisfied, the processor stops 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 13 (depends on 1) The wireless communication terminal of claim 1, wherein the processor is configured to stop receiving the 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 14 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 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 processing data unit (PPDU) transmitted by the second modulation method, and when a predetermined condition for the plurality of fields is satisfied, stopping receiving the WUR frame without determining whether values of the plurality of fields are valid. ### Claim 15 (depends on 14) The method of claim 14, wherein the predetermined condition comprises a case where the wireless communication terminal is not an intended recipient of the WUR frame. ### Claim 16 (depends on 15) The method of claim 15, 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 the wireless communication terminal as the recipient of the WUR frame. ### Claim 17 (depends on 16) The method of claim 16, wherein the plurality of fields of the WUR frame comprise a plurality of reception terminal fields indicating a wireless communication terminal to receive the WUR frame, and the plurality of reception terminal fields are located in the WUR frame based on the order of the size of the value of the identifier of the wireless communication terminal indicated by each of the plurality of reception terminal fields, wherein the stopping the receiving the WUR frame comprises comparing the value of the received reception terminal field with the value of the identifier of the wireless communication terminal and determining whether the wireless communication terminal is not the intended recipient of the WUR frame based on a result of the comparison. ### Claim 18 (depends on 16) The method of claim 16, 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 19 (depends on 16) The method of claim 16, 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 20 (depends on 15) The method of claim 15, wherein the predetermined condition comprises a case where the wireless communication terminal does not support the reception of the WUR frame.