# US 10,375,675 B2 · Method and system for device-to-device communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,675 B2 - Document ID: US10375675B2 - Status: Granted - Kind: B2 - Application number: 15/944,541 - Filed: 2018-04-03 - Published: 2018-08-09 - Granted: 2019-08-06 - Earliest claimed: 2018-04-03 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Phong Nguyen; Pushpika Wijesinghe - Web page: https://patentgrep.com/patent/US10375675B2 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 8/005: {Discovery of network devices, e.g. terminals} - H04W 36/0066: {of control information between different types of networks in order to establish a new radio link in the target network} - H04W 48/16: Discovering, processing access restriction or access information - H04W 48/20: Selecting an access point - H04W 52/02: Power saving arrangements - H04W 56/001: {Synchronization between nodes} - H04W 72/20: Control channels or signalling for resource management - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04L 5/0092: {Indication of how the channel is divided} - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 device-to-device user equipment (D2D-UE) and a method for use by a device-to-device user equipment (D2D-UE) is provided. The method comprises: determining, according to a non-UE specific resource allocation configuration, a plurality of available channels within a resource pool; selecting a primary channel of the plurality of available channels for the transmission of data; determining one or more transmission (TX) opportunities and one or more reception (RX) opportunities associated with the selected primary channel, wherein the transmit opportunities comprise a transmit subframe and an associated transmit resource block which are allocated for data transmission, and the reception opportunities comprise a transmit subframe which is not allocated for data transmission; transmitting a scheduling assignment (SA) on a TX opportunity of the TX opportunities; and receiving, an SA of another D2D-UE on an RX opportunity of the RX opportunities. ## Claims ### Claim 1 A method implemented in a device-to-device (D2D) user equipment (UE) used in a wireless communications system, the method comprising: receiving a network configured parameter; determining allowed time resource patterns for transmitting data on a UE-to-UE interface, based on the network configured parameter; determining an allowed time resource pattern from the allowed time resource patterns; and transmitting, in a first time period, information related to the allowed time resource pattern; wherein the allowed time resource pattern indicates a resource pattern in a second time period and corresponds to a bitmap, and each bit in the bitmap indicates whether or not a subframe is used for data transmission, wherein the first time period starts prior to the second time period used for data transmission and starts after an offset with respect to a starting point of LTE system frame. ### Claim 2 (depends on 1) The method of claim 1, wherein determining a channel for transmission of the information. ### Claim 3 (depends on 1) The method of claim 1, wherein a pool of subframes in the second time period comprises subframes of which each bit of a second bitmap indicates 1. ### Claim 4 (depends on 1) The method of claim 1, wherein the time resource patterns are determined according to a length of the bitmap. ### Claim 5 A method implemented in a base station used in a wireless communications system, the method comprising: transmitting a network configured parameter; wherein allowed time resource patterns for transmitting data on a UE-to-UE interface is determined based on the network configured parameter, an allowed time resource pattern is determined from the allowed time resource patterns, the allowed time resource pattern indicates a resource pattern in a second time period and corresponds to a bitmap, and each bit in the bitmap indicates whether or not a subframe is used for data transmission, wherein the first time period starts prior to the second time period used for data transmission and starts after an offset with respect to a starting point of LTE system frame. ### Claim 6 (depends on 5) The method of claim 5, wherein the time resource patterns are determined according to a length of the bitmap. ### Claim 7 A device-to-device (D2D) user equipment (UE) comprising a memory storing instructions and a processor configured to execute the instructions to: receive a network configured parameter; determine allowed time resource patterns for transmitting data on a UE-to-UE interface based on the network configured parameter, determining an allowed time resource pattern from the allowed time resource patterns; and transmitting, in a first time period, information related to the allowed time resource pattern; wherein the allowed time resource pattern indicates a resource pattern in a second time period and corresponds to a bitmap, and each bit in bitmap indicates whether or not a subframe in a resource pool is used for the data transmission, wherein the first time period starts prior to the second time period used for data transmission and starts after an offset with respect to a starting point of LTE system frame. ### Claim 8 (depends on 7) The UE of claim 7, wherein determining a channel for transmission of the information. ### Claim 9 (depends on 7) The UE of claim 7, wherein a pool of subframes in the second time period comprises subframes of which each bit of a second bitmap indicates 1. ### Claim 10 (depends on 7) The UE of claim 7, wherein the time resource patterns are determined according to a length of the bitmap.