# US 2023/0056412 A1 · Inducing broadcast channel in resonance magnetic coupled communication systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0056412 A1 - Document ID: US20230056412A1 - Status: Published application - Kind: A1 - Application number: 17/796,181 - Filed: 2021-01-29 - Published: 2023-02-23 - Earliest claimed: 2020-01-30 - Assignees: IDAC Holdings, Inc. - Applicants: Idac Holdings, Inc. - Inventors: Patrick Cabrol; Tanbir Haque; Ravikumar Pragada; Hussain Elkotby - Web page: https://patentgrep.com/patent/US20230056412A1 ## CPC - H02J 50/40: using two or more transmitting or receiving devices (H02J50/50 takes precedence) - H04B 17/327: Received signal code power [RSCP] - H02J 50/12: of the resonant type - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H04B 5/73: for taking measurements, e.g. using sensing coils - H04B 5/266: {One coil at each side, e.g. with primary and secondary coils} - H04B 5/45: Transponders - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04B: TRANSMISSION ## Abstract A method implemented in a wireless transmit/receive unit (WTRU) for forming a broadcast channel in a resonance magnetic coupled communication system is provided. The method may include receiving a request from a plurality of devices to join the broadcast channel and transmitting a reference signal to the plurality of devices. The method may also include requesting a measurement of signal quality based on the reference signal from the plurality of devices and receiving the measurement of signal quality from the plurality of devices. Further it may include determining a frequency range for the broadcast channel based on the measurement of signal quality and transmitting a configuration of the broadcast channel to the plurality of devices. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 A method performed by a wireless transmit/receive unit (WTRU) for configuring a broadcast channel in a resonance magnetic coupled communication system, the method comprising: receiving, from each of a plurality of devices, a message including a request to receive transmissions over a broadcast channel; transmitting a reference signal to the plurality of devices; transmitting, to the plurality of devices, a message requesting signal measurements of the transmitted reference signal; receiving, from each of the plurality of devices, signal measurement reports including the requested signal measurements of the transmitted reference signal, wherein the requested signal measurements are associated with corresponding device-specific frequency ranges; transmitting, to each of at least a subset of the plurality of devices, a message requesting adjustment, by each of the at least the subset of the plurality of devices, of a parameter to improve a signal quality indicated by a signal measurement received from each of the at least the subset of the plurality of devices; receiving, from each of the at least the subset of the plurality of devices, signal measurement reports including new signal measurements associated with corresponding device-specific frequency ranges; transmitting a configuration message to the plurality of devices, the configuration message indicating a broadcast channel frequency and bandwidth, wherein the broadcast channel frequency and bandwidth are at least in part based on the new signal measurements and the corresponding device-specific frequency ranges of the at least the subset of the plurality of devices; and sending a transmission using the indicated broadcast channel frequency and bandwidth. ### Claim 22 (depends on 21) The method of claim 21, wherein the parameter is a loop-to-coil coefficient, and wherein the loop-to-coil coefficient modifies an efficiency or range of the resonance magnetic coupled communication system. ### Claim 23 (depends on 21) The method of claim 21, wherein the indicated signal quality is a received signal strength indication (RSSI) value. ### Claim 24 (depends on 21) The method of claim 21, wherein the indicated signal quality is a signal-to-noise ratio (SNR) value. ### Claim 25 (depends on 21) The method of claim 21, wherein the message requesting signal measurements of the transmitted reference signal is a request for signal measurements associated with the device-specific frequency ranges. ### Claim 26 (depends on 21) The method of claim 21, wherein the configuration message includes an indication of a cluster membership status of each of the plurality of devices, and wherein the cluster membership status is determined based on the received signal measurement reports including signal measurements. ### Claim 27 (depends on 21) The method of claim 21, wherein the broadcast channel frequency is located within a median frequency range of the device-specific frequency ranges. ### Claim 28 (depends on 21) The method of claim 21, wherein the broadcast channel frequency is overlapped by at least a subset of the device-specific frequency ranges. ### Claim 29 A wireless transmit/receive unit (WTRU) configured to communicate via a resonance magnetic communication link, the WTRU comprising: an antenna having a loop coupled to a multi-turn spiral coil; and a processor and a transceiver communicatively coupled to the antenna and configured to: receive, from each of a plurality of devices, a message including a request to receive transmissions over a broadcast channel; transmit a reference signal to the plurality of devices; transmit, to the plurality of devices, a message requesting signal measurements of the transmitted reference signal; receive, from each of the plurality of devices, signal measurement reports including the requested signal measurements of the transmitted reference signal, wherein the requested signal measurements are associated with corresponding device-specific frequency ranges; transmit, to each of at least a subset of the plurality of devices, a message requesting adjustment, by each of the at least the subset of the plurality of devices, of a parameter to improve a signal quality indicated by a signal measurement received from each of the at least the subset of the plurality of devices; receive, from each of the at least the subset of the plurality of devices, signal measurement reports including new signal measurements associated with corresponding device-specific frequency ranges; transmit a configuration message to the plurality of devices, the configuration message indicating a broadcast channel frequency and bandwidth, wherein the broadcast channel frequency and bandwidth are at least in part based on the new signal measurements and the corresponding device-specific frequency ranges of the at least the subset of the plurality of devices; and send a transmission using the indicated broadcast channel frequency and bandwidth. ### Claim 30 (depends on 29) The WTRU of claim 29, wherein the parameter is a loop-to-coil coefficient, and wherein the loop-to-coil coefficient modifies an efficiency or range of the resonance magnetic coupled communication system. ### Claim 31 (depends on 29) The WTRU of claim 29, wherein the indicated signal quality is a received signal strength indication (RSSI) value. ### Claim 32 (depends on 29) The WTRU of claim 29, wherein the indicated signal quality is a signal-to-noise ratio (SNR) value. ### Claim 33 (depends on 29) The WTRU of claim 29, wherein the message requesting signal measurements of the transmitted reference signal is a request for signal measurements associated with the device-specific frequency ranges. ### Claim 34 (depends on 29) The WTRU of claim 29, wherein the configuration message includes an indication of a cluster membership status of each of the plurality of devices, and wherein the cluster membership status is determined based on the received signal measurement reports including signal measurements. ### Claim 35 (depends on 29) The WTRU of claim 29, wherein the broadcast channel frequency is located within a median frequency range of the device-specific frequency ranges. ### Claim 36 (depends on 29) The WTRU of claim 29, wherein the broadcast channel frequency is overlapped by at least a subset of the device-specific frequency ranges. ### Claim 37 A wireless transmit/receive unit (WTRU) configured to communicate via a resonance magnetic communication link, the WTRU comprising: an antenna having a loop coupled to a multi-turn spiral coil; and a processor and a transceiver communicatively coupled to the antenna and configured to: transmit, to another WTRU, a message including a request to send transmissions over a broadcast channel; receive a reference signal from the another WTRU; receive, from the another WTRU, a message requesting signal measurements of the received reference signal; transmit, to the another WTRU, a signal measurement report including the requested signal measurement of the received reference signal, wherein the requested signal measurement is associated with a device-specific frequency range; receive, from the another WTRU, a message requesting adjustment of a parameter to improve a signal quality indicated by the signal measurement; transmit, to the another WTRU, a signal measurement report including a new signal measurement associated with the device-specific frequency range; receive a configuration message from the another WTRU, the configuration message indicating a broadcast channel frequency and bandwidth, wherein the broadcast channel frequency and bandwidth are at least in part based on the new signal measurement and the device-specific frequency range; and receive a transmission using the indicated broadcast channel frequency and bandwidth. ### Claim 38 (depends on 37) The WTRU of claim 37, wherein the parameter is a loop-to-coil coefficient, and wherein the loop-to-coil coefficient modifies an efficiency or range of the resonance magnetic coupled communication link. ### Claim 39 (depends on 37) The WTRU of claim 37, wherein the broadcast channel frequency is located within a median frequency range of the device-specific frequency ranges. ### Claim 40 (depends on 37) The WTRU of claim 37, wherein the broadcast channel frequency is overlapped by at least a subset of the device-specific frequency ranges.