# US 8,570,925 B2 · Systems and methods for reducing power consumption in wireless devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,570,925 B2 - Document ID: US8570925B2 - Status: Granted - Kind: B2 - Application number: 12/491,167 - Filed: 2009-06-24 - Published: 2010-01-14 - Granted: 2013-10-29 - Earliest claimed: 2008-07-10 - Assignees: Marvell World Trade Ltd. - Applicants: Raja Banerjea - Inventors: Raja Banerjea - Web page: https://patentgrep.com/patent/US8570925B2 ## CPC - H04W 52/0212: {managed by the network, e.g. network or access point is leader and terminal is follower} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 72/12: Wireless traffic scheduling - 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) - 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 method for reducing power consumption in wireless devices includes establishing a wireless link between a local device and a remote device and sending a message to the remote device across the wireless link. The message may specify a communication schedule. Communications between the local device and the remote device are performed according to the communication schedule. The communication schedule specifies time periods in which data is not transferred between the local device and the remote device, and during such time periods at least one of the local device or the remote device enters a low power mode. ## Claims ### Claim 1 A method for reducing power consumption in wireless devices, the method comprising: generating a communication schedule in a local device based on a profile stored in the local device, wherein the communication schedule specifies (i) a first duration of time during which data is transferred between the local device and a remote device, and (ii) a second duration of time during which data is not transferred between the local device and the remote device, and wherein the profile indicates (i) a start time, (ii) a duration, and (iii) a periodicity for communicating between the local device and the remote device using a wireless protocol at a close range; establishing a wireless link between the local device and the remote device; sending the communication schedule in a message to the remote device across the wireless link, wherein the message is a pre-existing message of the wireless protocol used to communicate interference present in an operating environment of the local device and the remote device; and communicating between the local device and the remote device according to the communication schedule, wherein, during the second duration of time, at least one of the local device or the remote device enters a low power mode. ### Claim 2 (depends on 1) The method of claim 1, wherein; the message is sent across the wireless link using a first wireless protocol; and the communicating between the local device and the remote device is performed using a second wireless protocol. ### Claim 3 (depends on 2) The method of claim 2, wherein; the first wireless protocol is Bluetooth; and the second wireless protocol is an Institute of Electrical and Electronics Engineers (IEEE) 802.11 protocol. ### Claim 4 (depends on 3) The method of claim 3, wherein the pre-existing message is an activity report, and wherein the communication schedule is sent in the activity report. ### Claim 5 (depends on 1) The method of claim 1, wherein the local device and the remote device communicate using a Bluetooth Alternate MAC/PHY (BT AMP) protocol. ### Claim 6 (depends on 1) The method of claim 1, further comprising determining the communication schedule from a Bluetooth profile on the local device. ### Claim 7 (depends on 1) The method of claim 1, wherein the wireless protocol is Bluetooth. ### Claim 8 (depends on 1) The method of claim 1, wherein the wireless protocol is an Institute of Electrical and Electronics Engineers (IEEE) 802.11 protocol. ### Claim 9 (depends on 1) The method of claim 1, wherein: the communicating includes transferring audio data to the remote device based on the communication schedule; and the communication schedule transfers sufficient audio data to the remote device to stream a corresponding audio signal without interruption. ### Claim 10 (depends on 1) The method of claim 1, wherein during the second duration of time, the local device enters the low power mode and the remote device does not enter the low power mode. ### Claim 11 (depends on 10) The method of claim 10, further comprising: periodically sending a request-to-send message from the remote device to the local device, wherein the local device responds to the request-to-send message with a clear-to-send message if the request-to-send message is received by the local device when the local device is not in the low power mode. ### Claim 12 (depends on 1) The method of claim 1, wherein during the second duration of time, the remote device enters the low power mode. ### Claim 13 (depends on 1) The method claim 1, further comprising adjusting communication between the local device and the remote device based on the interference. ### Claim 14 (depends on 1) The method claim 1, further comprising scheduling communication between the local device and the remote device based on the interference. ### Claim 15 (depends on 1) The method of claim 1, further comprising communicating between the local device and the remote device using a second wireless protocol to transfer bulks of data at high speed. ### Claim 16 A wireless device comprising: a wireless transmitter; a wireless receiver; and a controller configured to generate a communication schedule in the wireless device based on a profile stored in the wireless device, wherein the communication schedule specifies (i) a first duration of time during which data is transferred between the wireless device and a remote device, and (ii) a second duration of time during which data is not transferred between the wireless device and the remote device, and wherein the profile indicates (i) a start time, (ii) a duration, and (iii) a periodicity for communicating between the wireless device and the remote device using a wireless protocol at a close range; use the wireless transmitter and the wireless receiver to establish a wireless link between the wireless device and the remote device; and using the transmitter, send the communication schedule in a message to the remote device across the wireless link, wherein the message is a pre-existing message of the wireless protocol used to communicate interference present in an operating environment of the wireless device and the remote device, wherein the communication occurs in accordance with the communication schedule, and wherein, during the second duration of time, at least one of the wirelesses device or the remote device enters a low power mode. ### Claim 17 (depends on 16) The wireless device of claim 16, wherein: the message is sent across the wireless link using an activity report in a Bluetooth protocol; and at least a portion of the communication between the wireless device and the remote device is performed using an Institute of Electrical and Electronics Engineers (IEEE) 802.11 protocol. ### Claim 18 (depends on 16) The wireless device of claim 16, wherein the wireless device and the remote device communicate using a Bluetooth Alternate MAC/PHY (BT AMP) protocol. ### Claim 19 (depends on 16) A wireless system comprising the wireless device of claim 16.