# US 2026/0074875 A1 · Communication apparatus, control method, and computer-readable storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0074875 A1 - Document ID: US20260074875A1 - Status: Published application - Kind: A1 - Application number: 19/315,999 - Filed: 2025-09-02 - Published: 2026-03-12 - Earliest claimed: 2024-09-12 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Kohtaro Koike - Web page: https://patentgrep.com/patent/US20260074875A1 ## CPC - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 5/0039: {Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another} - H04W 16/14: Spectrum sharing arrangements {between different networks} - 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 A communication apparatus that concurrently performs communication with an access point using a first communication interface as a station and communication with another apparatus functioning as a Client using a second communication interface as a Group Owner of a Wi-Fi Direct standard changes, in a case where a first wireless frame indicating a change of a frequency channel in use is received from the access point during a time when the first communication interface uses a frequency channel in a predetermined frequency band that needs support of a Dynamic Frequency Selection function and where the second communication interface uses a same frequency channel in the predetermined frequency band as that of the first communication interface, the frequency channel of the first communication interface and the second communication interface based on the first wireless frame. ## Claims ### Claim 1 A communication apparatus comprising: a communication unit capable of executing communication complying with an IEEE 802.11 standard series using a plurality of communication interfaces; a confirmation unit configured to, in a case where communication with an access point (AP) using a first communication interface as a station (STA) and communication with another apparatus functioning as a Client (CL) using a second communication interface as a Group Owner (GO) of a Wi-Fi Direct (WFD) standard are concurrently performed, and in a case where a first wireless frame indicating a change of a frequency channel in use is received from the AP during a time when the first communication interface uses a frequency channel in a predetermined frequency band that needs support of a Dynamic Frequency Selection (DFS) function, confirm whether the second communication interface uses a same frequency channel in the predetermined frequency band as that of the first communication interface; and a change unit configured to, in a case where it is confirmed that the second communication interface uses the same frequency channel in the predetermined frequency band as that of the first communication interface, change the frequency channel of the first communication interface and the second communication interface based on the first wireless frame. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein in a case where the frequency channel of the first communication interface after the change is a frequency channel in a frequency band that does not need support of the DFS function, the change unit is configured to change the frequency channel of the second communication interface to the same frequency channel as the frequency channel of the first communication interface after the change. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein in a case where the frequency channel of the first communication interface after the change is a frequency channel in the frequency band that needs support of the DFS function, the change unit is configured to change the frequency channel of the second communication interface to a frequency channel in the frequency band that does not need support of the DFS function, which is different from the frequency channel of the first communication interface after the change. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the change unit is configured to change the frequency channel of the second communication interface before a timing to change the frequency channel of the first communication interface specified by the first wireless frame. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the change unit is configured to transmit, to the other apparatus functioning as the CL, a second wireless frame including information indicating a timing to change the frequency channel of the second communication interface and the frequency channel of the second communication interface after the change. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein the second wireless frame is one of a Beacon frame, a Probe Response frame, and an Action frame including a Channel Switch Announcement (CSA) Element. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein the change unit is configured to change the frequency channel of the second communication interface when the Beacon frame is transmitted as many times as a predetermined count as the GO, and to transmit, to the other apparatus, the second wireless frame in which the predetermined count is stored as a value of a Channel Switch Count of the CSA Element. ### Claim 8 (depends on 6) The apparatus according to claim 6, wherein the change unit is configured to transmit, to the other apparatus, the second wireless frame in which the frequency channel of the second communication interface after the change is stored as a value of a New Channel Number of the CSA Element. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein in a case where the frequency channel of the first communication interface after the change is a frequency channel in the frequency band that needs support of the DFS function, the change unit is configured to stop a function as the GO by disconnecting connection to the other apparatus functioning as the CL in the second communication interface, and after the change of the frequency channel of the first communication interface, to reactivate the function as the GO using the same frequency channel as the frequency channel of the first communication interface after the change and connects to the other apparatus. ### Claim 10 (depends on 1) The apparatus according to claim 1, wherein the first wireless frame is one of a Beacon frame, a Probe Response frame, and an Action frame including a Channel Switch Announcement (CSA) Element. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein after reception of the first wireless frame, the change unit is configured to change the frequency channel of the first communication interface in accordance with an elapse of a period in which the AP transmits the Beacon frame as many times as a count indicated by the value of the Channel Switch Count in the CSA Element of the first wireless frame. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein the change unit is configured to change the frequency channel of the first communication interface to a frequency channel specified by the value of the New Channel Number of the CSA Element of the first wireless frame. ### Claim 13 (depends on 1) The apparatus according to claim 1, wherein in a case where it is confirmed that the second communication interface uses a frequency channel different from that of the first communication interface or in a case where it is confirmed that the second communication interface uses the same frequency channel as that of the first communication interface, which is a frequency channel in a frequency band different from the predetermined frequency band, based on the first wireless frame, the change unit is configured to change the frequency channel of the first communication interface and does not change the frequency channel of the second communication interface. ### Claim 14 A control method executed by a communication apparatus capable of executing communication complying with an IEEE 802.11 standard series using a plurality of communication interfaces, comprising: in a case where communication with an access point (AP) using a first communication interface as a station (STA) and communication with another apparatus functioning as a Client (CL) using a second communication interface as a Group Owner (GO) of a Wi-Fi Direct (WFD) standard are concurrently performed, and in a case where a first wireless frame indicating a change of a frequency channel in use is received from the AP during a time when the first communication interface uses a frequency channel in a predetermined frequency band that needs support of a Dynamic Frequency Selection (DFS) function, confirming whether the second communication interface uses the same frequency channel in the predetermined frequency band as that of the first communication interface; and in a case where it is confirmed that the second communication interface uses the same frequency channel in the predetermined frequency band as that of the first communication interface, changing the frequency channel of the first communication interface and the second communication interface based on the first wireless frame. ### Claim 15 A non-transitory computer-readable storage medium that stores a program for causing, when the program is executed by a computer included in a communication apparatus capable of executing communication complying with an IEEE 802.11 standard series using a plurality of communication interfaces, the computer to carry out a control method comprising: in a case where communication with an access point (AP) using a first communication interface as a station (STA) and communication with another apparatus functioning as a Client (CL) using a second communication interface as a Group Owner (GO) of a Wi-Fi Direct (WFD) standard are concurrently performed, and in a case where a first wireless frame indicating a change of a frequency channel in use is received from the AP during a time when the first communication interface uses a frequency channel in a predetermined frequency band that needs support of a Dynamic Frequency Selection (DFS) function, confirming whether the second communication interface uses the same frequency channel in the predetermined frequency band as that of the first communication interface; and in a case where it is confirmed that the second communication interface uses the same frequency channel in the predetermined frequency band as that of the first communication interface, changing the frequency channel of the first communication interface and the second communication interface based on the first wireless frame.