# US 11,445,453 B2 · Method and apparatus for controlling power of device by using bluetooth technology > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,453 B2 - Document ID: US11445453B2 - Status: Granted - Kind: B2 - Application number: 16/972,905 - Filed: 2019-06-07 - Published: 2021-08-12 - Granted: 2022-09-13 - Earliest claimed: 2018-06-07 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jingu Choi; Taeyoung Song; Minsoo Lee; Jinkwon Lim - Web page: https://patentgrep.com/patent/US11445453B2 ## CPC - H04W 52/383: {power control in peer-to-peer links} - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04W 52/242: {taking into account path loss} - H04W 52/245: {taking into account received signal strength} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/08: Closed loop power control - H04W 52/288: {taking into account the usage mode, e.g. hands-free, data transmission or telephone} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present disclosure relates to a method and apparatus for controlling a power by using the Bluetooth Low Energy technology performed by a control device. According to the present disclosure, the method and apparatus includes establishing a connection with a first device and a second device through Bluetooth Low Energy (BLE) and receiving, from the first device, a first request message for requesting a transmission power change of the first device. In addition, the method and apparatus includes receiving, from the second device, a second request message for requesting a transmission power change of the second device and changing a transmission power of the control device to a specific transmission power value based on the first change value and the second change value. ## Claims ### Claim 1 A method for controlling a power in a wireless communication system, the method performed by a control device comprising: establishing a connection with a first device and a second device through Bluetooth Low Energy (BLE); receiving, from the first device, a first request message for requesting a transmission power change of the first device, wherein the first request message includes a first transmission power value of a transmission power of the first device and a first change value of a transmission power; receiving, from the second device, a second request message for requesting a transmission power change of the second device, wherein the second request message includes a second transmission power value of a transmission power of the second device and a second change value of a transmission power; and changing a transmission power of the control device to a specific transmission power value based on the first change value and the second change value, wherein the specific transmission power value is a value of a third transmission power value, which is the transmission power of the control device, added by the first change value or the second change value. ### Claim 2 (depends on 1) The method of claim 1, further comprising: transmitting a response message including the specific transmission power value to the first device and the second device. ### Claim 3 (depends on 2) The method of claim 2, when the specific transmission power value is a value of the third transmission power value added by the first change value, wherein the response message transmitted to the second device includes reason information related to a reason why the specific transmission power value is changed based on the first change value. ### Claim 4 (depends on 2) The method of claim 2, when the specific transmission power value is a value of the third transmission power value added by the second change value, wherein the response message transmitted to the first device includes reason information related to a reason why the specific transmission power value is changed to the value of the third transmission power value added by the second change value. ### Claim 5 (depends on 1) The method of claim 1, wherein the specific transmission power value is changed based on a greater value between the first change value and the second change value. ### Claim 6 (depends on 5) The method of claim 5, further comprising: identifying a Received Signal Strength Indicator (RSSI) or a Path Loss of the first device or the second device. ### Claim 7 (depends on 6) The method of claim 6, when the RSSI is a threshold value or greater, further comprising: receiving, from the first device or the second device, a third request message for requesting a decrease of the transmission power of the control device, wherein the third request message includes a third change value related to a decreased transmission power; and transmitting the response message including the decreased third transmission power value to the first device or the second device. ### Claim 8 (depends on 1) The method of claim 1, wherein the specific transmission power value is differently configured for each of a link, a stream or an event for providing a specific service between the first device and the second device. ### Claim 9 (depends on 8) The method of claim 8, wherein a controller and a host of the control device exchange at least one parameter value through a Host Controller Interface (HCI) command to configure the specific transmission power value differently for each of the link, the stream or the event between the first device and the second device. ### Claim 10 A control device for controlling a power in a wireless communication system, comprising: a communication unit for communicating with an exterior wirelessly or wirely; and a processor functionally connected to the communication unit, wherein the processor is configured to: establish a connection with a first device and a second device through Bluetooth Low Energy (BLE); receive, from the first device, a first request message for requesting a transmission power change of the first device, wherein the first request message includes a first transmission power value of a transmission power of the first device and a first change value of a transmission power; receive, from the second device, a second request message for requesting a transmission power change of the second device, wherein the second request message includes a second transmission power value of a transmission power of the second device and a second change value of a transmission power; and change a transmission power of the control device to a specific transmission power value based on the first change value and the second change value, wherein the specific transmission power value is a value of a third transmission power value, which is the transmission power of the control device, added by the first change value or the second change value.