# US 10,772,129 B2 · Method and apparatuses for controlling communications depending on detected radar signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,129 B2 - Document ID: US10772129B2 - Status: Granted - Kind: B2 - Application number: 16/485,047 - Filed: 2018-02-05 - Published: 2019-11-28 - Granted: 2020-09-08 - Earliest claimed: 2017-02-10 - Assignees: British Telecommuncations Public Limited Company - Applicants: British Telecommunications Public Limited Company - Inventors: Simon Ringland; Francis Scahill - Web page: https://patentgrep.com/patent/US10772129B2 ## CPC - H04W 74/0816: with collision avoidance - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 92/20: between access points - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods and apparatus are disclosed for controlling wireless communication between a first wireless access point and one or more user devices, the first access point having an interface for communication with the user devices on one or more wireless communication channels in a predetermined frequency range, and also being configured to communicate with one or more other wireless access points. The access points each have a radar detector operable to detect possible radar signals within the frequency range, and are configured to provide information indicative of whether or not possible radar signals have been detected. The first access point receives communications relating to information provided by the other access points, and starts or stops wireless communications with its user devices on a particular channel based on whether or not it has detected possible radar signals together with whether or not the other wireless access points have detected possible radar signals. ## Claims ### Claim 1 A method of controlling wireless communication between a first wireless access point and one or more user devices, the first wireless access point having a wireless communication interface for wireless communication with the one or more user devices using one or more wireless communication channels in a predetermined frequency range, the first wireless access point being configured to communicate with one or more other wireless access points, the first wireless access point and the one or more other wireless access points each having a radar detector operable to detect possible radar signals received by the access point within the predetermined frequency range and each being configured to provide information indicative of whether or not possible radar signals have been detected within the predetermined frequency range, the method comprising: the first wireless access point receiving communications relating to information provided by the one or more other wireless access points, and starting or stopping the wireless communication with the one or more user devices using a wireless communication channel in the predetermined frequency range in dependence on information indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the first wireless access point and on information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points, wherein the starting or stopping of the wireless communication between the first wireless access point and the one or more user devices is in response to detection by the first wireless access point of one or more possible radar signals within the predetermined frequency range, the wireless communication being started or stopped in dependence on a detection threshold, the detection threshold itself being updated in dependence on the information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points. ### Claim 2 (depends on 1) The method according to claim 1, wherein the starting or stopping of the wireless communication between the first wireless access point and the one or more user devices is in response to detection by the first wireless access point of one or more possible radar signals within the predetermined frequency range, the wireless communication being started or stopped in dependence on whether information is received indicating that at least one of the other wireless access points is also detecting one or more possible radar signals within the predetermined frequency range. ### Claim 3 (depends on 1) The method according to claim 1, wherein the starting or stopping of the wireless communication between the first wireless access point and the one or more user devices is in response to receipt by the first wireless access point of a communication dependent on information having been provided by at least one other wireless access point indicative of whether or not the at least one other wireless access point has detected one or more possible radar signals within the predetermined frequency range. ### Claim 4 (depends on 1) The method according to claim 1, the first wireless access point being operable to communicate with the one or more user devices at different times using different wireless communication channels within a frequency band, the wireless communication channels each having a predetermined frequency range within the frequency band, the first wireless access point and one or more of the other wireless access points being operable to detect possible radar signals within the different wireless communication channels and being configured to provide information indicative thereof, the method further comprising the first wireless access point receiving communications relating to information provided by the one or more other wireless access points in respect of the channels and selecting a wireless communication channel for communication with the one or more user devices in dependence on information indicative of one or more possible radar signals detected within the wireless communication channels by the first wireless access point and on information provided by the one or more other wireless access points indicative of one or more possible radar signals detected within the wireless communication channels by the one or more other wireless access points. ### Claim 5 (depends on 1) The method according to claim 1, the first wireless access point being operable to communicate with the one or more user devices at different times using channels within different frequency bands, at least one of the bands including radar frequencies and at least one of the bands not including radar frequencies, the method further comprising the first wireless access point selecting a frequency band for communication with the one or more user devices in dependence on information indicative of one or more possible radar signals detected within the wireless communication channels by the first wireless access point and on information provided by the one or more other wireless access points indicative of one or more possible radar signals detected within the wireless communication channels by the one or more other wireless access points. ### Claim 6 (depends on 1) The method according to claim 1, the first wireless access point being configured to communicate directly with the one or more other wireless access points. ### Claim 7 (depends on 1) The method according to claim 1, the first wireless access point being configured to communicate with the one or more other wireless access points via a control unit. ### Claim 8 (depends on 7) The method according to claim 7, the control unit being configured to forward information provided by other wireless access points to the first wireless access point. ### Claim 9 (depends on 7) The method according to claim 7, the control unit being configured to determine an instruction dependent on information provided by the other wireless access points and forwards an indication of the instruction to the first wireless access point. ### Claim 10 (depends on 1) The method according to claim 1, the radar detector being operable to detect possible radar signals received via the wireless communication interface of the access point. ### Claim 11 (depends on 1) The method according to claim 1, the radar detector being operable to detect possible radar signals received via a radar detection interface of the access point. ### Claim 12 (depends on 1) The method according to claim 1, wherein the information indicative of whether or not possible radar signals have been detected within the predetermined frequency range by a respective wireless access point comprises information characterizing each detection by the wireless access point of a possible radar signal within the predetermined frequency range or an indication that there have been no detections by the wireless access point of possible radar signals within the predetermined frequency range. ### Claim 13 An apparatus for controlling wireless communication between a first wireless access point and one or more user devices, the first wireless access point having a wireless communication interface for wireless communication with the one or more user devices using one or more wireless communication channels in a predetermined frequency range, the first wireless access point being configured to communicate with one or more other wireless access points, the first wireless access point and the one or more other wireless access points each having a radar detector operable to detect possible radar signals received by the access point within the predetermined frequency range and each being configured to provide information indicative of whether or not possible radar signals have been detected within the predetermined frequency range, the apparatus comprising: a receiver configured to receive communications relating to information provided by the one or more other wireless access points; and a processor configured to start or stop the wireless communication with the one or more user devices using a wireless communication channel in the predetermined frequency range in dependence on information indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the first wireless access point and on information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points, wherein the processor is configured to start or stop the wireless communication between the first wireless access point and the one or more user devices in response to detection by the first wireless access point of one or more possible radar signals within the predetermined frequency range, the wireless communication being started or stopped in dependence on a detection threshold, the detection threshold itself being updated in dependence on the information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points. ### Claim 14 A first wireless access point comprising: a wireless communication interface for wireless communication with one or more user devices using one or more wireless communication channels in a predetermined frequency range, the first wireless access point being configured to communicate with one or more other wireless access points; a radar detector operable to detect possible radar signals received by the first access point within the predetermined frequency range and being configured to provide information indicative of whether or not possible radar signals have been detected within the predetermined frequency range; and an apparatus for controlling wireless communication between the first wireless access point and the one or more user devices, the apparatus comprising: a receiver configured to receive communications relating to information provided by the one or more other wireless access points; and a processor configured to start or stop the wireless communication with the one or more user devices using a wireless communication channel in the predetermined frequency range in dependence on information indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the first wireless access point and on information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points, wherein the processor is configured to start or stop the wireless communication between the first wireless access point and the one or more user devices in response to detection by the first wireless access point of one or more possible radar signals within the predetermined frequency range, the wireless communication being started or stopped in dependence on a detection threshold, the detection threshold itself being updated in dependence on the information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points. ### Claim 15 A computer program element comprising computer program code to, when loaded into a computer system and executed thereon, cause the computer system to control wireless communication between a first wireless access point and one or more user devices, the first wireless access point having a wireless communication interface for wireless communication with the one or more user devices using one or more wireless communication channels in a predetermined frequency range, the first wireless access point being configured to communicate with one or more other wireless access points, the first wireless access point and the one or more other wireless access points each having a radar detector operable to detect possible radar signals received by the access point within the predetermined frequency range and each being configured to provide information indicative of whether or not possible radar signals have been detected within the predetermined frequency range, by: the first wireless access point receiving communications relating to information provided by the one or more other wireless access points, and starting or stopping the wireless communication with the one or more user devices using a wireless communication channel in the predetermined frequency range in dependence on information indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the first wireless access point and on information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points, wherein the starting or stopping of the wireless communication between the first wireless access point and the one or more user devices is in response to detection by the first wireless access point of one or more possible radar signals within the predetermined frequency range, the wireless communication being started or stopped in dependence on a detection threshold, the detection threshold itself being updated in dependence on the information provided by the one or more other wireless access points indicative of whether or not possible radar signals have been detected within the predetermined frequency range by the one or more other wireless access points.