# US 10,873,925 B2 · Time-frequency resource determining method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,925 B2 - Document ID: US10873925B2 - Status: Granted - Kind: B2 - Application number: 16/370,960 - Filed: 2019-03-30 - Published: 2019-07-25 - Granted: 2020-12-22 - Earliest claimed: 2016-09-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Zhenshan Zhao - Web page: https://patentgrep.com/patent/US10873925B2 ## CPC - H04W 72/02: Selection of wireless resources by user or terminal - H04W 56/0015: {one node acting as a reference for the others} - H04W 56/006: {using known positions of transmitter and receiver} - H04W 72/044: based on the type of the allocated resource - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - H04W 72/30: Resource management for broadcast services - H04W 76/14: Direct-mode setup - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/541: using the level of interference - 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 A time-frequency resource determining method and an apparatus are provided. When a first terminal (100) uses a first time-frequency resource to communicate with a second terminal (200) by using a D2D system, and the first terminal (100) uses a second time-frequency resource to communicate with a base station by using a cellular system, because the first time-frequency resource partly or completely overlaps the second time-frequency resource, the first terminal (100) skips using the first resource to communicate with the second terminal (200). In this case, communication of the D2D system does not interfere with communication of the cellular system. Therefore, when the first time-frequency resource partly or completely overlaps the second time-frequency resource, a problem that the D2D system causes communication interference to the cellular system so that the first terminal (100) cannot communicate normally is avoided. ## Claims ### Claim 1 A time-frequency resource determining method, wherein the method comprises: determining, by a first terminal, a first time-frequency resource, wherein the first time-frequency resource is determined by the first terminal based on a first timing, and the first time-frequency resource is a time-frequency resource used for communication between the first terminal and a second terminal; determining, by the first terminal, a second time-frequency resource, wherein the second time-frequency resource is determined by the first terminal based on a second timing, and the second time-frequency resource is a time-frequency resource used for communication between the first terminal and a base station; determining, by the first terminal, that the first time-frequency resource partly or completely overlaps the second time-frequency resource in time domain; and in response to determining that the first time-frequency resource partly or completely overlaps the second time-frequency resource in time domain stop using, by the first terminal, the first time-frequency resource to communicate with the second terminal and using, by the first terminal, a third time-frequency resource for communication with the second terminal, wherein the third time-frequency is determined by the base station based on second time-frequency resource. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first timing is a timing obtained based on the Global Navigation Satellite System (GNSS), and the second timing is a timing obtained based on the base station. ### Claim 3 (depends on 1) The method according to claim 1, further comprising: sending, by the first terminal, indication information to the second terminal, wherein the indication information is used to instruct not to use the first time-frequency resource for communication between the first terminal and the second terminal. ### Claim 4 (depends on 3) The method according to claim 3, further comprising: sending, by the first terminal, the indication information to the second terminal by using a physical sidelink broadcast channel (PSBCH). ### Claim 5 (depends on 1) The method according to claim 1, further comprising: sending, by the first terminal, a timing offset to the second terminal, wherein the timing offset is a timing offset between the first timing and the second timing. ### Claim 6 A time-frequency resource determining method, wherein the method comprises: receiving, by a second terminal, a timing offset sent by a first terminal; determining, by the second terminal, a second timing based on the timing offset and a first timing; determining, by the second terminal based on the first timing and the second timing, that a first time-frequency resource partly or completely overlaps a second time-frequency resource in time domain, wherein the first time-frequency resource is determined by the first terminal based on the first timing, and the first time-frequency resource is a time-frequency resource for communication between the first terminal and the second terminal; and the second time-frequency resource is determined by the first terminal based on the second timing, and the second time-frequency resource is a time-frequency resource for communication between the first terminal and a base station; and in response to determining that the first time-frequency resource partly or completely overlaps the second time-frequency resource in time domain stop using, by the second terminal, the first time-frequency resource to communicate with the first terminal and using, by the second terminal, a third time-frequency resource for communication with the second terminal, wherein the third time-frequency is determined by the base station based on second time-frequency resource. ### Claim 7 (depends on 6) The method according to claim 6, wherein the first timing is a timing obtained based on the Global Navigation Satellite System (GNSS), and the second timing is a timing obtained based on the base station. ### Claim 8 A time-frequency resource determining method, wherein the method comprises: determining, by a base station, a third time-frequency resource, wherein the third time-frequency resource is determined by the base station based on a first timing, and the third time-frequency resource is a time-frequency resource used for communication between a first terminal and a second terminal; determining, by the base station, a second time-frequency resource, wherein the second time-frequency resource is determined by the base station based on a second timing, and the second time-frequency resource is a time-frequency resource used for communication between the first terminal and the base station; determining, by the base station, that the third time-frequency resource does not overlap the second time-frequency resource in time domain; and sending, by the base station, resource configuration information to the first terminal, wherein the resource configuration information is used to instruct to use the third time-frequency resource for communication between the first terminal and the second terminal after the first terminal determines that the second time-frequency resource is partly or completely overlaps a first time-frequency resource in time domain. ### Claim 9 (depends on 8) The method according to claim 8, wherein the first timing is a timing obtained based on the Global Navigation Satellite System (GNSS), and the second timing is a timing obtained based on the base station. ### Claim 10 (depends on 8) The method according to claim 8, wherein the sending the resource configuration information to the first terminal comprises: sending, by the base station, the resource configuration information to the first terminal by using a system broadcast message (SIB), downlink control information (DCI), or radio resource control (RRC) signaling.