# US 10,321,439 B2 · Method for device-to-device communication in wireless communication system and device therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,439 B2 - Document ID: US10321439B2 - Status: Granted - Kind: B2 - Application number: 15/501,431 - Filed: 2015-08-03 - Published: 2017-08-10 - Granted: 2019-06-11 - Earliest claimed: 2014-08-03 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Hakseong Kim; Hanbyul Seo - Web page: https://patentgrep.com/patent/US10321439B2 ## CPC - H04W 72/20: Control channels or signalling for resource management - H04B 1/713: using frequency hopping - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/0012: {Hopping in multicarrier systems} - H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 76/14: Direct-mode setup - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0023: {Time-frequency-space} - H04L 5/1469: {using time-sharing} - H04W 28/20: Negotiating bandwidth - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed are a method for device-to-device (D2D) communication in a wireless communication system and a device therefor. Particularly, the method for performing D2D communication in a wireless communication system comprises the steps of: receiving, by a first terminal from a base station, downlink control information including resource allocation information for D2D transmission; transmitting, by the first terminal to a second terminal, D2D control information on a physical sidelink control channel (PSCCH) on the basis of the resource allocation information for the D2D transmission; and transmitting, by the first terminal to the second terminal, D2D data on a physical sidelink shared channel (PSSCH) on the basis of the resource allocation information for the D2D transmission, wherein frequency hopping can occur between a resource of the PSCCH for a first transmission of the D2D control information and a resource of the PSCCH for a second transmission of the D2D control information. ## Claims ### Claim 1 A method for performing a Device-to-Device (D2D) communication in a wireless communication system, the method performed by a first user equipment (UE) and comprising: receiving downlink (DL) control information from a base station (BS), the DL control information including resource allocation information for a D2D transmission; transmitting D2D control information on a Physical Sidelink Control Channel (PSCCH) to a second UE based on the resource allocation information; and transmitting D2D data on a Physical Sidelink Shared Channel (PSSCH) to the second UE based on the resource allocation information, wherein frequency hopping is performed between a PSCCH resource for a first transmission of the D2D control information and a PSCCH resource for a second transmission of the D2D control information, wherein the resource allocation information includes resource allocation information of only the PSCCH, and wherein a PSSCH resource for the transmission of the D2D data is derived from the resource allocation information of the only the PSCCH based on a transmission unit of the D2D control information and a transmission unit of the D2D data. ### Claim 2 (depends on 1) The method of claim 1, wherein performing the frequency hopping applies a Physical Uplink Shared Channel (PUSCH) hopping scheme using one or more parameters of a subframe index in which the D2D control information is transmitted, an identifier (ID) of the first UE and an ID of the second UE. ### Claim 3 (depends on 1) The method of claim 1, wherein a bandwidth of the frequency hopping is configured according to an attribute of the first UE or the second UE. ### Claim 4 (depends on 1) The method of claim 1, wherein a frequency hopping scheme is configured according to a number of repeated transmissions of the D2D control information. ### Claim 5 (depends on 1) The method of claim 1, wherein different hopping schemes are determined for each of different transmissions of the D2D control information. ### Claim 6 (depends on 1) The method of claim 1, further comprising receiving the transmission unit of the D2D control information and the transmission unit of the D2D data from the BS. ### Claim 7 (depends on 1) The method of claim 1, wherein a multiple relationship between a resource block (RB) index of the PSSCH and an RB index of the PSSCH is determined according to a multiple relationship between the transmission unit of the D2D control information and the transmission unit of the D2D data. ### Claim 8 (depends on 1) The method of claim 1, wherein: a resource gap is configured at least between transmission units of the D2D control information or between transmission units of the D2D data, and the PSSCH resource is derived using the configured resource gap. ### Claim 9 (depends on 1) The method of claim 1, wherein at least the transmission unit of the D2D control information or the transmission unit of the D2D data is configured as a multiple of a resource block group. ### Claim 10 (depends on 1) The method of claim 1, wherein at least the transmission unit of the D2D control information or the transmission unit of the D2D data is configured as a resource block group size predetermined according to a bandwidth allocated for the D2D communication. ### Claim 11 (depends on 1) The method of claim 1, wherein: the transmission unit of the D2D data is configured as a resource block group; and the transmission unit of the D2D control information is configured as a predetermined position in the resource block group. ### Claim 12 (depends on 1) The method of claim 1, wherein: the DL control information further includes a first resource allocation field and a second resource allocation field; the first resource allocation field includes the resource allocation information of the only the PSCCH for the first transmission of the D2D control information; and the second resource allocation field includes the resource allocation information of the only the PSCCH for transmissions other than the first transmission of the D2D control information. ### Claim 13 (depends on 1) The method of claim 1, wherein: the DL control information further includes a first resource allocation field and a second resource allocation field; the first resource allocation field includes the resource allocation information of the only the PSCCH for all types of transmissions of the D2D control information; and the second resource allocation field includes the transmission unit of the D2D control information. ### Claim 14 A first user equipment (UE) for performing a Device-to-Device (D2D) communication in a wireless communication system, the first UE comprising: a radio frequency (RF) unit configured to transmit and receive wireless signals; and a processor configured to: control the RF unit to receive downlink (DL) control information from a base station (BS), the DL control information including resource allocation information for a D2D transmission; control the RF unit to transmit D2D control information on a Physical Sidelink Control Channel (PSCCH) to a second UE based on the resource allocation information; and control the RF unit to transmit D2D data on a Physical Sidelink Shared Channel (PSSCH) to the second UE based on the resource allocation information, wherein frequency hopping is performed between a PSCCH resource for a first transmission of the D2D control information and a PSCCH resource for a second transmission of the D2D control information, wherein the resource allocation information includes resource allocation information of only the PSCCH, and wherein a PSSCH resource for the transmission of the D2D data is derived from the resource allocation information of the only the PSCCH based on a transmission unit of the D2D control information and a transmission unit of the D2D data. ### Claim 15 (depends on 14) The first UE of claim 14, wherein the performing the frequency hopping applies a Physical Uplink Shared Channel (PUSCH) hopping scheme using one or more parameters of a subframe index in which the D2D control information is transmitted, an identifier (ID) of the first UE and an ID of the second UE. ### Claim 16 (depends on 14) The first UE of claim 14, wherein a bandwidth of the frequency hopping is configured according to an attribute of the first UE or the second UE. ### Claim 17 (depends on 14) The first UE of claim 14, wherein a frequency hopping scheme is configured according to a number of repeated transmissions of the D2D control information. ### Claim 18 (depends on 14) The first UE of claim 14, wherein different hopping schemes are determined for each of different transmissions of the D2D control information. ### Claim 19 (depends on 14) The first UE of claim 14, wherein the processor is further configured to control the RF unit to receive the transmission unit of the D2D control information and the transmission unit of the D2D data from the BS. ### Claim 20 (depends on 14) The first UE of claim 14, wherein a multiple relationship between a resource block (RB) index of the PSSCH and an RB index of the PSSCH is determined according to a multiple relationship between the transmission unit of the D2D control information and the transmission unit of the D2D data.