# US 11,310,744 B2 · Communication apparatus, control method, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,744 B2 - Document ID: US11310744B2 - Status: Granted - Kind: B2 - Application number: 16/668,173 - Filed: 2019-10-30 - Published: 2020-05-14 - Granted: 2022-04-19 - Earliest claimed: 2018-11-08 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Yuki Fujimori - Web page: https://patentgrep.com/patent/US11310744B2 ## CPC - H04W 52/0241: {where no transmission is received, e.g. out of range of the transmitter} - 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 A communication apparatus determines that communication with another communication apparatus as a transmission destination of a signal generated by a wake-up radio (WUR) conforming to the Institute of Electrical and Electronics Engineers (IEEE) 802.11ba standard, has been disconnected, based on communication conforming to the IEEE 802.11 series standard, and performs control to stop transmission of a predetermined signal performed by the WUR. ## Claims ### Claim 1 A communication apparatus, comprising: one or more memories having instructions stored therein; and one or more processors that, upon execution of the instructions, are configured to: determine whether communication with a first other communication apparatus has been disconnected, based on communication by a primary connectivity radio (PCR) conforming to Institute of Electrical and Electronics Engineers (IEEE) 802.11 series standard, the first other communication apparatus being a transmission destination of a signal to be generated by a wake-up radio (WUR) conforming to IEEE 802.11ba standard; determine, in a case where communication with said first other communication apparatus is determined to have been disconnected, whether no other communication apparatus as being the transmission destination of the signal is present, and perform control to stop transmission of the signal performed by the WUR in a case where no other communication apparatus as being the transmission destination is determined to be present, while not to stop transmission of the signal performed by the WUR in a case where a second other communication apparatus as being the transmission destination is determined to be present, the second other communication apparatus being different from the first other communication apparatus. ### Claim 2 (depends on 1) The communication apparatus according to claim 1, wherein communication with the first other communication apparatus is determined to have been disconnected, based on that communication by the PCR having not been performed with the first other communication apparatus for a first period. ### Claim 3 (depends on 2) The communication apparatus according to claim 2, the one or more processors are further configured to: determine that communication with a third other communication apparatus not conforming to IEEE 802.11ba standard has been disconnected, based on that communication with the third other communication apparatus having not been performed for a second period, wherein the first period and the second period are different in length from each other. ### Claim 4 (depends on 1) The communication apparatus according to claim 1, wherein communication with the first other communication apparatus is determined to have been disconnected, based on that a frame conforming to IEEE 802.11 series standard to be used to disconnect wireless connection having been communicated to the first other communication apparatus. ### Claim 5 (depends on 4) The communication apparatus according to claim 4, wherein the frame to disconnect wireless connection is a disassociation frame or a deauthentication frame conforming to IEEE 802.11 series standard. ### Claim 6 (depends on 4) The communication apparatus according to claim 4, wherein the frame to disconnect wireless connection is a WUR mode teardown frame conforming to IEEE 802.11ba standard. ### Claim 7 (depends on 6) The communication apparatus according to claim 6, wherein the one or more processors are further configured to: transmit a WUR beacon conforming to IEEE 802.11ba standard, wherein the WUR mode teardown frame is a frame transmitted by the first other communication apparatus based on that the first other communication apparatus having not received the WUR beacon transmitted by the communication apparatus. ### Claim 8 (depends on 1) The communication apparatus according to claim 1, the one or more processors are further configured to: transmit a first frame conforming to IEEE 802.11 series standard, to the first other communication apparatus, wherein, based on that the first frame being transmitted to the first other communication apparatus and a response to the first frame being not received from the first other communication apparatus, communication with the first other communication apparatus is determined to have been disconnected. ### Claim 9 (depends on 8) The communication apparatus according to claim 8, wherein the first frame is transmitted a plurality of times, and wherein, based on that no response to the first frame transmitted the plurality of times being received, communication with the first other communication apparatus is determined to have been disconnected. ### Claim 10 (depends on 1) The communication apparatus according to claim 1, the one or more processors are further configured to: transmit a second frame conforming to IEEE 802.11ba standard, to the first other communication apparatus, wherein, based on that the second frame being transmitted to the first other communication apparatus and a response to the second frame being not received from the first other communication apparatus, communication with the first other communication apparatus is determined to have been disconnected. ### Claim 11 (depends on 1) The communication apparatus according to claim 1, wherein, based on that communication with the first other communication apparatus having been determined to be disconnected, a control to stop transmission of a WUR beacon conforming to IEEE 802.11ba standard performed by the WUR to the first other communication apparatus is performed. ### Claim 12 (depends on 1) The communication apparatus according to claim 1, wherein the control to stop transmission of the signal performed by the WUR includes a control to stop supply of power or a clock to the WUR is performed. ### Claim 13 (depends on 1) The communication apparatus according to claim 1, wherein the first other commutation apparatus is configured to not include a function to transmit a frame to be performed by the WUR. ### Claim 14 A method of controlling a communication apparatus, the method comprising: determining whether communication with a first other communication apparatus has been disconnected, based on communication by a primary connectivity radio (PCR) conforming to IEEE 802.11 series standard, the first other communication apparatus being a transmission destination of a signal to be generated by a WUR conforming to IEEE 802.11ba standard; determining, in a case where communication with said first other communication apparatus is determined to have been disconnected, whether no other communication apparatus as being the transmission destination of the signal is present, and performing control to stop transmission of the signal performed by the WUR in a case where no other communication apparatus as being the transmission destination is determined to be present, while not to stop transmission of the signal performed by the WUR in a case where a second other communication apparatus as being the transmission destination is determined to be present, the second other communication apparatus being different from the first other communication apparatus. ### Claim 15 A non-transitory computer-readable storage medium storing a computer program for causing a computer to execute a method of controlling a communication apparatus, the method comprising: determining whether communication with a first other communication apparatus has been disconnected, based on communication by a primary connectivity radio (PCR) conforming to IEEE 802.11 series standard, the first other communication apparatus being a transmission destination of a signal to be generated by a WUR conforming to IEEE 802.11ba standard; determining, in a case where communication with said first other communication apparatus is determined to have been disconnected, whether no other communication apparatus as being the transmission destination of the signal is present, and performing control to stop transmission of the signal performed by the WUR in a case where no other communication apparatus as being the transmission destination is determined to be present, while not to stop transmission of the signal performed by the WUR in a case where a second other communication apparatus as being the transmission destination is determined to be present, the second other communication apparatus being different from the first other communication apparatus.