# US 2016/0262111 A1 · Inter-Network Assisted Power Control for Interference Mitigation of D2D Communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0262111 A1 - Document ID: US20160262111A1 - Status: Published application - Kind: A1 - Application number: 14/424,112 - Filed: 2015-01-14 - Published: 2016-09-08 - Earliest claimed: 2014-02-10 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget Lm Ericsson (Publ) - Inventors: Gary Boudreau; Christian BERGLJUNG; Muhammad KAZMI; Iana SIOMINA; Stefano SORRENTINO - Web page: https://patentgrep.com/patent/US20160262111A1 ## CPC - H04W 52/242: {taking into account path loss} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 52/245: {taking into account received signal strength} - H04W 52/383: {power control in peer-to-peer links} - H04W 76/10: Connection setup - H04W 76/14: Direct-mode setup - H04W 52/283: {Power depending on the position of the mobile} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/386: {centralized, e.g. when the radio network controller or equivalent takes part in the power control} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract According to some embodiments, a first network node manages a transmit power of a first wireless device capable of device-to-device, D2D, communication. The first network node receives at least one measurement report from at least one of the first wireless device and a second wireless device in D2D communication with the first wireless device. The measurement report indicates a received signal measurement or path loss with respect to the other of the first wireless device and the second wireless device and/or a received signal measurement or path loss with respect to a victim node. The first network node sends the first wireless device instructions to make an adjustment of the transmit power that the first wireless device uses in the D2D communication. The adjustment is at least partially based on the received measurement report. ## Claims ### Claim 1 A method in a first network node for managing a transmit power of a first wireless device that is capable of device-to-device, D2D, communication, the method comprising: receiving at least one measurement report from at least one of the first wireless device and a second wireless device in D2D communication with the first wireless device, the measurement report indicating a received signal measurement or path loss with respect to the other of the first wireless device and the second wireless device and/or a received signal measurement or path loss with respect to a victim node; and sending the first wireless device instructions to make an adjustment of the transmit power that the first wireless device uses in the D2D communication, wherein the adjustment is at least partially based on the received measurement report. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving a reference signal of the victim node, the reference signal of the victim node received via one of the first wireless device or the second wireless device that forwards the reference signal from the victim node to the first network node; wherein the adjustment of the transmit power that the first wireless device uses in the D2D communication is partially based on the received reference signal. ### Claim 3 (depends on 1) The method of claim 1, wherein the adjustment of the transmit power that the first wireless device uses in the D2D communication is partially based on the position of the first wireless device relative to the position of the victim node. ### Claim 4 (depends on 1) The method of claim 1, further comprising: obtaining from the victim node information on propagation conditions seen by the victim node; wherein the adjustment of the transmit power that the first wireless device uses in the D2D communication is partially based on the obtained propagation conditions. ### Claim 5 (depends on 1) The method of claim 1, further comprising sending information related to the adjustment of the first wireless device's transmit power to the victim node or another network node. ### Claim 6 (canceled) ### Claim 7 (canceled) ### Claim 8 (depends on 1) The method of claim 1, wherein the first network node is the serving network node of at least one of the first wireless device and the second wireless device. ### Claim 9 (depends on 1) The method of claim 1, wherein the first network node operates on a first carrier frequency, f1, and the victim node operates on a second carrier frequency, f2, wherein f1 and f2 are different. ### Claim 10 (depends on 1) The method of claim 1, wherein the first carrier frequency, f1, and the second carrier frequency, f2, are adjacent in frequency domain. ### Claim 11 (depends on 1) The method of claim 1, wherein the first carrier frequency, f1, and the second carrier frequency, f2, are non-adjacent in frequency domain. ### Claim 12 A method in a first wireless device, the method comprising: sending at least one measurement report to a first network node, the measurement report indicating a received signal measurement or path loss with respect to a second wireless device in D2D communication with the first wireless device and/or a received signal measurement or path loss with respect to a victim node; receiving from the first network node a transmit power that the first wireless device is to use in the D2D communication; and adjusting the transmit power that the first wireless device uses in the D2D communication based on the received transmit power. ### Claim 13 (depends on 12) The method of claim 12, further comprising: receiving a reference signal of the victim node; and adjusting the transmit power based on the strength of the received reference signal. ### Claim 14 (depends on 12) The method of claim 12, further comprising: receiving a reference signal of the victim node; and forwarding the reference signal to the first network node. ### Claim 15 (canceled) ### Claim 16 (canceled) ### Claim 17 (depends on 12) The method of claim 12, wherein the measurement report includes a signal measurement that the first wireless communication device measures on a signal transmitted by the second wireless device. ### Claim 18 (depends on 12) The method of claim 12, wherein the measurement report includes a signal measurement that the first wireless communication receives from the second wireless device in response to the second wireless device measuring a signal transmitted by the first wireless device. ### Claim 19 (depends on 12) The method of claim 12, wherein the first network node is the serving network node of at least one of the first wireless device and the second wireless device. ### Claim 20 (depends on 12) The method of claim 12, wherein the first network node operates on a first carrier frequency, f1, and the victim node operates on a second carrier frequency, f2, wherein f1 and f2 are different. ### Claim 21 (depends on 12) The method of claim 12, wherein the first carrier frequency, f1, and the second carrier frequency, f2, are adjacent in frequency domain. ### Claim 22 (depends on 12) The method of claim 12, wherein the first carrier frequency, f1, and the second carrier frequency, f2, are non-adjacent in frequency domain. ### Claim 23 A first network node for managing a transmit power of a first wireless device that is capable of device-to-device, D2D, communication, the network node comprising a processor and a memory containing instructions whereby, when the instructions are executed by said processor, the first network node is operable to: receive at least one measurement report from at least one of the first wireless device and a second wireless device in D2D communication with the first wireless device, the measurement report indicating a received signal measurement or path loss with respect to the other of the first wireless device and the second wireless device and/or a received signal measurement or path loss with respect to a victim node; and send the first wireless device instructions to make an adjustment of the transmit power that the first wireless device uses in the D2D communication, wherein the adjustment is at least partially based on the received measurement report. ### Claim 24 (depends on 23) The first network node of claim 23, further operable to: receive a reference signal of the victim node, the reference signal of the victim node received via one of the first wireless device or the second wireless device that forwards the reference signal from the victim node to the first network node; wherein the adjustment of the transmit power that the first wireless device uses in the D2D communication is partially based on the received reference signal. ### Claim 25 (depends on 23) The first network node of claim 23, wherein the adjustment of the transmit power that the first wireless device uses in the D2D communication is partially based on the position of the first wireless device relative to the position of the victim node. ### Claim 26 (depends on 23) The first network node of claim 23, further operable to: obtain from the victim node information on propagation conditions seen by the victim node; wherein the adjustment of the transmit power that the first wireless device uses in the D2D communication is partially based on the obtained propagation conditions. ### Claim 27 (depends on 23) The first network node of claim 23, further operable to send information related to the adjustment of the first wireless device's transmit power to the victim node or another network node. ### Claim 28 (canceled) ### Claim 29 (canceled) ### Claim 30 (canceled) ### Claim 31 A first wireless device comprising comprise a processor and a memory containing instructions whereby, when the instructions are executed by said processor, the first wireless device is operable to: send at least one measurement report to a first network node, the measurement report indicating a received signal measurement or path loss with respect to a second wireless device in D2D communication with the first wireless device and/or a received signal measurement or path loss with respect to a victim node; receive from the first network node a transmit power that the first wireless device is to use in the D2D communication; and adjust the transmit power that the first wireless device uses in the D2D communication based on the received transmit power. ### Claim 32 (depends on 31) The first wireless device of claim 31, further operable to: receive a reference signal of the victim node; and adjust the transmit power based on the strength of the received reference signal. ### Claim 33 (depends on 31) The first wireless device of claim 31, further operable to: receive a reference signal of the victim node; and forward the reference signal to the first network node. ### Claim 34 (canceled) ### Claim 35 (canceled) ### Claim 36 (depends on 31) The first wireless device of claim 31, wherein the measurement report includes a signal measurement that the first wireless communication device measures on a signal transmitted by the second wireless device. ### Claim 37 (depends on 31) The first wireless device of claim 31, wherein the measurement report includes a signal measurement that the first wireless communication receives from the second wireless device in response to the second wireless device measuring a signal transmitted by the first wireless device. ### Claim 38 (canceled)