# US 2018/0027490 A1 · Wake-Up Radio Assisted WLAN Power Saving Technologies > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027490 A1 - Document ID: US20180027490A1 - Status: Published application - Kind: A1 - Application number: 15/631,351 - Filed: 2017-06-23 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Yong Liu; Christiaan A. Hartman; Siegfried Lehmann; Su Khiong Yong; Guoqing Li - Web page: https://patentgrep.com/patent/US20180027490A1 ## CPC - H04W 52/02: Power saving arrangements - G08C 17/02: using a radio link - H04B 7/18532: {Arrangements for managing transmission, i.e. for transporting data or a signalling message} - H04L 69/18: Multiprotocol handlers, e.g. single devices capable of handling multiple protocols - H04W 52/0206: {in access points, e.g. base stations} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 68/02: Arrangements for increasing efficiency of notification or paging channel - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B} - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04W 48/12: using downlink control channel - H04W 68/12: Inter-network notification - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - 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) - G08C: TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS (fluid pressure transmitting systems F15B; mechanical means for transferring the output of a sensing member into a different variable G01D5/00; mechanical control systems G05G) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 dual-radio AP including both a high-power (e.g., Wi-Fi) radio and a low-power (e.g., BLE) radio may support an assisted wakeup service for a power-limited dual-radio mobile device (STA). The power-limited STA may register with the AP for the assisted wakeup service, and may then disable its Wi-Fi radio (or otherwise initiate a lower-power mode). The power-limited STA may receive a BLE communication indicating the AP has pending Wi-Fi transmissions or updates applicable to the power-limited STA. In response, the power-limited STA may turn on its Wi-Fi radio and receive the pending transmissions or updates from the AP. If an AP does not include a low-power radio, then a high-power/low-power dual-radio STA that is not power-limited may serve as an assisted wakeup service proxy. The proxy may scan and trace the Wi-Fi beacons from the AP, and generate the BLE communication to the power-limited STA on behalf of the AP. ## Claims ### Claim 1 A wireless communication device, comprising: a high-power communication module configured to communicate according to a first communication protocol; a low-power communication module configured to communicate according to a second, different communication protocol; and at least one processor communicatively coupled to the high-power communication module and the low-power communication module, wherein the at least one processor is configured to execute software instructions to cause the wireless communication device to: receive a low-power update (LPU) message via the low-power communication module, according to the second communication protocol, while the high-power communication module is in an inactive state; determine that the LPU message comprises a traffic indication map (TIM) indicating that an access point has data available to send to the wireless communication device according to the first protocol; in response to the determining, transition the high-power communication module from the inactive state to an active state; and receive a data message including the data via the high-power communication module while the high-power communication module is in the active state. ### Claim 2 (depends on 1) The wireless communication device of claim 1, wherein the first communication protocol is a Wi-Fi protocol, and the second communication protocol is a Bluetooth Low Energy protocol. ### Claim 3 (depends on 1) The wireless communication device of claim 1, wherein the low-power update (LPU) message is received from the access point. ### Claim 4 (depends on 1) The wireless communication device of claim 1, wherein the low-power update (LPU) message is received from a proxy device that is not the access point. ### Claim 5 (depends on 1) The wireless communication device of claim 1, wherein the low-power communication module is configured to periodically transition from an inactive state to an active state to scan for the LPU message. ### Claim 6 (depends on 1) The wireless communication device of claim 1, wherein the low-power communication module is configured to transmit an advertisement message, wherein the LPU message is responsive to the advertisement message. ### Claim 7 (depends on 1) The wireless communication device of claim 1, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: transition the low-power communication module from an inactive state to an active state, while the high-power communication module is in the inactive state; responsive to the transitioning, transmit an advertisement message via the low-power communication module, according to the second communication protocol; determining whether a scan request message was received via the low-power communication module, responsive to the advertisement message, within a predetermined amount of time following the transmitting the advertisement message; in response to determining that the scan request message was not received within the predetermined amount of time: transition the low-power communication module from the active state to the inactive state; and in response to determining that the scan request message was received within the predetermined amount of time: transmit a scan response message via the low-power communication module, indicating that the wireless communication device will scan for further communication according to the second communication protocol, wherein the LPU message is responsive to the scan response message. ### Claim 8 (depends on 1) The wireless communication device of claim 1, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: receive from the access point a first beacon according to the first communication protocol; and receive from the access point a second beacon according to the second communication protocol; wherein at least one of the first beacon or the second beacon indicates that the access point is capable of including in the LPU message, according to the second communication protocol, an indication that the access point has data available to send to the wireless communication device according to the first protocol. ### Claim 9 (depends on 1) The wireless communication device of claim 1, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: instruct the access point to include in the LPU message according to the second communication protocol, an indication that the access point has data available to send to the wireless communication device according to the first protocol; and cause the high-power communication module to enter the inactive state after the instructing. ### Claim 10 A wireless communication device, comprising: a high-power radio configured to communicate according to a first communication protocol; a low-power radio configured to communicate according to a second communication protocol; and at least one processor communicatively coupled to the high-power radio and the low-power radio, wherein the at least one processor is configured to execute software instructions to cause the wireless communication device to: receive a beacon message via the high-power radio, the beacon message comprising a traffic indication map (TIM) indicating that an access point has data available to transmit to a recipient device according to the first communication protocol; and transmit a low-power update (LPU) message to the recipient device via the low-power radio, the second communication comprising at least a portion of the TIM indicating that the access point has data available to transmit to the recipient device according to the first communication protocol. ### Claim 11 (depends on 10) The wireless communication device of claim 10, wherein the first communication protocol is a Wi-Fi protocol, and the second communication protocol is a Bluetooth Low Energy protocol. ### Claim 12 (depends on 10) The wireless communication device of claim 10, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: determine that the TIM comprises a block of identifiers of devices registered for assisted wakeup service, the block of identifiers comprising an identifier of the recipient device; wherein the at least the portion of the TIM comprises the block of identifiers assigned to devices registered for assisted wakeup service. ### Claim 13 (depends on 10) The wireless communication device of claim 10, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: receive from the access point an indication that the access point supports an assisted wakeup service; provide to the recipient device an indication that the wireless communication device supports the assisted wakeup service; and receive from the recipient device a request to implement the assisted wakeup service, wherein implementing the assisted wakeup service comprises transmitting the LPU message to the recipient device via the low-powered radio. ### Claim 14 (depends on 10) The wireless communication device of claim 10, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: receive from the recipient device, prior to the receiving the beacon message, an instruction to forward to the recipient device, according to the second communication protocol, the at least the portion of the TIM. ### Claim 15 (depends on 10) The wireless communication device of claim 10, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: receive from the recipient device an advertising message according to the second communication protocol, wherein transmitting the LPU message is responsive to the advertising message. ### Claim 16 (depends on 10) The wireless communication device of claim 10, wherein the at least one processor is configured to execute software instructions to further cause the wireless communication device to: receive an advertising message from the recipient device via the low-power radio, according to the second communication protocol, the advertising message indicating that the recipient device is prepared to receive communications according to the second communication protocol; transmit a scan request message via the low-power radio, responsive to the advertising message, the scan request message instructing the recipient device to scan for further communication according to the second communication protocol; receive a scan response message via the low-power radio, responsive to the scan request message, the scan response message acknowledging that the recipient device will scan for further communication according to the second communication protocol, wherein transmitting the LPU message is responsive to the scan response message. ### Claim 17 (depends on 10) The wireless communication device of claim 10, wherein the LPU message further comprises an indication of time until the next multicast transmission by the access point, and a beacon update sequence number, wherein the indication of time and the beacon update sequence number are derived from the beacon message. ### Claim 18 A non-transitory computer-readable medium storing software instructions executable by a processor of a wireless communication device to cause the wireless communication device to: receive a first communication according to a first communication protocol, the first communication comprising a traffic indication map (TIM) indicating that an access point has data available to transmit to a recipient device according to the first communication protocol; and transmit a second communication to the recipient device according to a second communication protocol, the second communication comprising at least a portion of the TIM indicating that the access point has data available to transmit to the recipient device according to the first communication protocol. ### Claim 19 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the software instructions are further executable to cause the wireless communication device to: receive from the access point an indication that the access point supports an assisted wakeup service; provide to the recipient device an indication that the wireless communication device supports the assisted wakeup service; and receive from the recipient device a request to implement the assisted wakeup service, wherein implementing the assisted wakeup service comprises transmitting the second communication according to the second communication protocol. ### Claim 20 (depends on 18) The non-transitory computer-readable medium of claim 18, wherein the software instructions are further executable to cause the wireless communication device to: determine that the TIM comprises a block of identifiers of devices registered for assisted wakeup service, the block of identifiers comprising an identifier of the recipient device; wherein the at least the portion of the TIM comprises the block of identifiers assigned to devices registered for assisted wakeup service.