# US 11,445,437 B2 · Methods and apparatus for efficient wakeup of wireless device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,437 B2 - Document ID: US11445437B2 - Status: Granted - Kind: B2 - Application number: 16/896,658 - Filed: 2020-06-09 - Published: 2020-09-24 - Granted: 2022-09-13 - Earliest claimed: 2016-11-28 - Assignees: Texas Instruments Incorporated - Applicants: Texas Instruments Incorporated - Inventors: Oran Naftali; Avi Baum; Yuval Jakira; Asaf Even-Chen - Web page: https://patentgrep.com/patent/US11445437B2 ## CPC - 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} - H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks - 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) - 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 In a described example, an integrated circuit includes an input coupled to receive a plurality of beacon frames, the beacon frames include an indication of data transmissions available for a device that includes the integrated circuit. The integrated circuit also includes a controller configured to compare the plurality of beacon frames to determine a plurality of bytes prior to the indication of data transmission available that is present in each of the plurality of beacon frames and is configured to provide a signal indicating a low power mode in which the device does not receive transmissions and to provide a signal indicating a wake mode at a selected time before transmission of the plurality of bytes in a subsequent beacon transmission. ## Claims ### Claim 1 An integrated circuit comprising: an input configured to communicatively receive: a first beacon frame, the first beacon frame including a first indication of a first data transmission; a second beacon frame, the second beacon frame including a second indication of a second data transmission; and a third beacon frame including an indicator of available data transmissions; and a controller coupled to the input and configured to: compare the first and second beacon frames to determine a plurality of bytes that is present in the first and second beacon frames; determine whether the received third beacon frame includes the determined plurality of bytes; and if the received third beacon frame does not include the determined plurality of bytes, provide a signal indicating a low power mode. ### Claim 2 (depends on 1) The integrated circuit of claim 1 in which the beacon frames are received from an access point. ### Claim 3 (depends on 1) The integrated circuit of claim 1 in which the indicator of available data transmissions is a Traffic Indication Map (TIM). ### Claim 4 (depends on 1) The integrated circuit of claim 1 in which the plurality of bytes is at least twelve bytes. ### Claim 5 (depends on 1) The integrated circuit of claim 1 in which the plurality of bytes is received at least a predetermined time prior to the third beacon frame. ### Claim 6 (depends on 1) The integrated circuit of claim 1 in which: the controller is configured to provide a signal indicating a wake mode before transmission of the plurality of bytes in a subsequent beacon frame transmission if the received third beacon frame includes the determined plurality of bytes; and the input includes a first data path during the wake mode and a second data path, the second data path configured to receive a subsequent beacon frame, the controller providing a signal selecting one of the first and second data paths. ### Claim 7 (depends on 1) The integrated circuit of claim 1 in which the beacon frame is part of a Wi-Fi transmission. ### Claim 8 A wireless station comprising: an antenna configured to communicatively receive: a first beacon frame, the first beacon frame including a first indication of a first data transmissions; a second beacon frame, the second beacon frame including a second indication of a second data transmission; and a third beacon frame including an indicator of available data transmissions; a controller coupled to the antenna and configured to: compare the first and second beacon frames to determine a plurality of bytes that is present in the first and second beacon frames; determine whether the received third beacon frame includes the determined plurality of bytes; and if the received third beacon frame does not include the determined plurality of bytes, provide a signal indicating a low power mode. ### Claim 9 (depends on 8) The wireless station of claim 8 in which the beacon frames are received from an access point. ### Claim 10 (depends on 8) The wireless station of claim 8 in which the indicator of available data transmissions is a Traffic Indication Map (TIM). ### Claim 11 (depends on 8) The wireless station of claim 8 in which the plurality of bytes is at least twelve bytes. ### Claim 12 (depends on 8) The wireless station of claim 8 in which the plurality of bytes is received at least a predetermined time prior to the third beacon frame. ### Claim 13 (depends on 8) The wireless station of claim 8 in which: the controller is configured to provide a signal indicating a wake mode at a selected time before transmission of the plurality of bytes in a subsequent beacon transmission if the received third beacon frame includes the determined plurality of bytes; and the antenna includes a first data path and a second data path, the second data path configured to receive a subsequent beacon frame, and the controller is configured to provide a signal selecting one of the first and second data paths. ### Claim 14 A method of operation comprising: receiving a first beacon frame, the first beacon frame including a first indication of available data transmissions; receiving a second beacon frame, the second beacon frame including a second indication of a second data transmission; comparing the first and second beacon frames to determine a plurality of bytes that is present in the first and second beacon frames; and receiving a third beacon frame, the third beacon frame including an indicator of available data transmissions; determining whether the received third beacon frame includes the determined plurality of bytes; and if the received third beacon frame does not include the determined plurality of bytes, providing a signal indicating a low power mode. ### Claim 15 (depends on 14) The method of claim 14 in which the beacon frames are received from an access point. ### Claim 16 (depends on 14) The method of claim 14 in which the indicator of available data transmissions is a Traffic Indication Map (TIM). ### Claim 17 (depends on 14) The method of claim 14 in which the plurality of bytes is at least twelve bytes. ### Claim 18 (depends on 14) The method of claim 14 in which the plurality of bytes is received at least a predetermined time prior to the third beacon frame. ### Claim 19 (depends on 14) The method of claim 14 further comprising: the received third beacon frame includes the determined plurality of bytes providing a signal indicating a wake mode before transmission of the plurality of bytes in a subsequent beacon transmission if the received third beacon frame includes the determined plurality of bytes; receiving transmissions using a first data path during the wake mode; and receiving transmissions using a second data path during the low power mode, the second data path configured to receive the subsequent beacon transmission. ### Claim 20 (depends on 14) The method of claim 14 in which the first beacon frame is part of a Wi-Fi transmission.