# US 11,310,849 B2 · Device-to-device (D2D) operation method of user equipment in wireless communication system and user equipment using the method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,849 B2 - Document ID: US11310849B2 - Status: Granted - Kind: B2 - Application number: 16/702,362 - Filed: 2019-12-03 - Published: 2020-04-02 - Granted: 2022-04-19 - Earliest claimed: 2014-10-14 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sunghoon Jung; Hanbyul Seo - Web page: https://patentgrep.com/patent/US11310849B2 ## CPC - H04W 76/14: Direct-mode setup - H04W 8/005: {Discovery of network devices, e.g. terminals} - H04W 8/24: Transfer of terminal data - H04W 48/02: Access restriction performed under specific conditions - H04W 48/16: Discovering, processing access restriction or access information - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 36/302: {due to low signal strength} - H04W 48/10: using broadcasted information - H04W 92/18: between terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided are a device-to-device (D2D) operation method of a user equipment (UE) in a wireless communication system and a UE using the method. The method comprises the steps of: transmitting sidelink UE information to a network; and receiving a D2D resource configuration determined on the basis of the sidelink UE information, wherein the sidelink UE information comprises at least one of information indicating whether the UE is interested in receiving a D2D signal, and a resource allocation request for transmitting the D2D signal. ## Claims ### Claim 1 A method for receiving a device-to-device (D2D) discovery signal in a wireless communication system, the method performed by a user equipment (UE) and comprising: receiving, from a network, a first sidelink discovery gap configuration which informs the UE of a plurality of parameters for generating a sidelink discovery gap, wherein a validity parameter for indicating whether the gap generation is allowed is included in the plurality of parameters; wherein based only on the UE not being capable of receiving the D2D discovery signal without the sidelink discovery gap, the UE transmits a request message for receiving the first sidelink discovery gap configuration, receiving the D2D discovery signal, without monitoring a downlink signal, within the sidelink discovery gap; receiving, from the network, a second discovery gap configuration which includes sidelink discovery gap release information; and releasing the sidelink discovery gap based on the second discovery gap configuration, wherein the sidelink discovery gap is configured in units of subframes, wherein the first sidelink discovery gap configuration includes a plurality of sidelink gap patterns, wherein a sidelink gap pattern among the plurality of sidelink gap patterns is dynamically activated and deactivated by a dynamic signal received by the UE, and wherein the plurality of parameters further includes a first parameter which informs the UE of a maximum number of subframes for generating the sidelink discovery gap. ### Claim 2 (depends on 1) The method of claim 1, wherein the UE transmits sidelink UE information to the network before receiving the first sidelink discovery gap configuration. ### Claim 3 (depends on 1) The method of claim 1, wherein each of the first sidelink discovery gap configuration and the second sidelink discovery gap configuration is received through a radio resource control (RRC) configuration. ### Claim 4 (depends on 1) The method of claim 1, wherein the downlink signal is a signal received from the network and the D2D discovery signal is a signal received from another UE. ### Claim 5 (depends on 1) The method of claim 1, wherein the UE receives the first sidelink discovery gap configuration without transmitting the request message, based only on the UE being capable of receiving the D2D discovery signal without the sidelink discovery gap. ### Claim 6 A user equipment (UE) comprising: a transceiver; and a processor operatively coupled to the transceiver, and wherein the processor is further configured to: receive, from a network, a first sidelink discovery gap configuration which informs the UE of a plurality of parameters for generating a sidelink discovery gap, wherein a validity parameter for indicating whether the gap generation is allowed is included in the plurality of parameters; wherein based only on the UE not being capable of receiving the D2D discovery signal without the sidelink discovery gap, the UE transmits a request message for receiving the first sidelink discovery gap configuration, receive the D2D discovery signal, without monitoring a downlink signal, within the sidelink discovery gap; receive, from the network, a second discovery gap configuration which includes sidelink discovery gap release information; and release the sidelink discovery gap based on the second discovery gap configuration, wherein the sidelink discovery gap is configured in units of subframes, wherein the first sidelink discovery gap configuration includes a plurality of sidelink gap patterns, wherein a sidelink gap pattern among the plurality of sidelink gap patterns is dynamically activated and deactivated by a dynamic signal received by the UE, wherein the plurality of parameters further includes a first parameter which informs the UE of a maximum number of subframes for generating the sidelink discovery gap. ### Claim 7 (depends on 6) The UE of claim 6, wherein the processor is further configured to transmit sidelink UE information to the network before receiving the first sidelink discovery gap configuration. ### Claim 8 (depends on 6) The UE of claim 6, wherein each of the first sidelink discovery gap configuration and the second sidelink discovery gap configuration is received through a radio resource control (RRC) configuration. ### Claim 9 (depends on 6) The UE of claim 6, wherein the downlink signal is a signal received from the network and the D2D discovery signal is a signal received from another UE.