# US 2021/0345273 A1 · Transmission timing determination method and device and computer-readable storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345273 A1 - Document ID: US20210345273A1 - Status: Published application - Kind: A1 - Application number: 17/280,478 - Filed: 2019-09-17 - Published: 2021-11-04 - Earliest claimed: 2018-09-28 - Assignees: Zte Corporation - Applicants: Zte Corporation - Inventors: Weimin XING; Youxiong LU; Feng BI - Web page: https://patentgrep.com/patent/US20210345273A1 ## CPC - H04W 56/0015: {one node acting as a reference for the others} - H04W 56/006: {using known positions of transmitter and receiver} - G01S 19/05: providing aiding data - H04W 56/001: {Synchronization between nodes} - H04W 56/0045: {compensating for timing error by altering transmission time} - H04W 56/005: {compensating for timing error by adjustment in the receiver} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract Disclosed are a transmission timing determination method, a transmission timing determination device, and a computer-readable storage medium. First timing adjustment information issued by a first node is received, and a first transmission timing of a second node is adjusted according to the first timing adjustment information, or a global navigation satellite system (GNSS) timing is used as the first transmission timing; and an adjustment manner of the first transmission timing is determined according to synchronization type indication information. ## Claims ### Claim 1 A transmission timing determination method, comprising: issuing, by a first node, first timing adjustment information to a second node, wherein the first timing adjustment information is used for adjusting a first transmission timing of a second node, or instructing, by the first node, the second node to use a global navigation satellite system (GNSS) timing as the first transmission timing of the second node; wherein the first transmission timing is a downlink transmission timing of the second node. ### Claim 2 (depends on 1) The transmission timing determination method of claim 1, further comprising: issuing, by the first node, synchronization type indication information to the second node; wherein the synchronization type indication information comprises at least one of: the GNSS timing or an over the air (OTA)/base station timing; the synchronization type indication information is used for determining an adjustment manner of the first transmission timing, the first node is a parent node of the second node, and the adjustment manner is the GNSS timing or the OTA/base station timing. ### Claim 3 (depends on 2) The transmission timing determination method of claim 2, wherein the synchronization type indication information comprises at least one of: a GNSS enable flag, information indicating timing synchronization type, or information indicating synchronization type priority. ### Claim 4 (depends on 3) The transmission timing determination method of claim 3, wherein in a case where the synchronization type indication information issued by the first node comprises the OTA/base station timing, the method further comprises: issuing mode indication information of the OTA/base station timing to the second node, wherein the mode indication information of the OTA/base station timing is carried in the first timing adjustment information or the synchronization type indication information. ### Claim 5 A transmission timing determination method, comprising: receiving, by a second node, first timing adjustment information transmitted by a first node, and adjusting a first transmission timing of the second node according to the first timing adjustment information; or using, by the second node, a global navigation satellite system (GNSS) timing as the first transmission timing of the second node, wherein the first transmission timing is a downlink transmission timing of the second node. ### Claim 6 (depends on 5) The transmission timing determination method of claim 5, wherein prior to receiving, by the second node, the first timing adjustment information transmitted by the first node, or prior to using, by the second node, the GNSS timing as the first transmission timing of the second node, the method further comprises: receiving, by the second node, synchronization type indication information transmitted by the first node, and determining a timing synchronization type using the GNSS timing and/or a timing synchronization type using the over the air (OTA)/base station timing; and determining a corresponding adjustment manner of the first transmission timing according to the timing synchronization type, wherein the adjustment manner is the GNSS timing or the OTA/base station timing. ### Claim 7 (depends on 6) The transmission timing determination method of claim 6, wherein the synchronization type indication information comprises at least one of: a GNSS enable flag, information indicating timing synchronization type, or information indicating synchronization type priority. ### Claim 8 (depends on 7) The transmission timing determination method of claim 7, wherein determining the corresponding adjustment manner of the first transmission timing according to the timing synchronization type comprises: in a case where the timing synchronization type of the GNSS timing is indicated in the synchronization type indication information and it is determined that the second node itself supports the GNSS timing, determining the timing synchronization type using the GNSS timing, and using the GNSS timing as the first transmission timing of the second node; and otherwise, determining the timing synchronization type using the OTA/base station timing; receiving the first timing adjustment information transmitted by the first node, and adjusting the first transmission timing of the second node according to the first timing adjustment information. ### Claim 9 (depends on 8) The transmission timing determination method of claim 8, further comprising: transmitting GNSS state information or capability information of the second node itself to the first node. ### Claim 10 (canceled) ### Claim 11 (canceled) ### Claim 12 (depends on 5) The transmission timing determination method of claim 5, wherein the first timing adjustment information comprises synchronization adjustment information, wherein the synchronization adjustment information comprises one of following adjustment amounts: a first adjustment amount ΔTa relative to a downlink receiving timing of a signal transmitted by the first node at the second node, a second adjustment amount ΔTb relative to a second transmission timing of the second node, or a third adjustment amount ΔTc relative to a current first transmission timing of the second node. ### Claim 13 (depends on 12) The transmission timing determination method of claim 12, further comprising: acquiring mode indication information of an OTA/base station timing transmitted by the first node, wherein a mode of the OTA/base station timing indicated by the mode indication information comprises at least one of: mode one where the first timing adjustment information is the synchronization adjustment information; mode two where the first timing adjustment information is time adjustment information; or mode three where the first timing adjustment information is time adjustment information. ### Claim 14 (depends on 13) The transmission timing determination method of claim 13, wherein, in a case where the mode indication information indicates the mode one, the adjusting the first transmission timing of the second node is to adjust the first transmission timing according to the mode one, and an adjustment of the mode one comprises one of: in a case where the synchronization adjustment information is the first adjustment amount ΔTa, the downlink receiving timing T1 of the second node is advanced by ΔTa to obtain the first transmission timing, wherein the first transmission timing is T1−ΔTa; in a case where the synchronization adjustment information is the second adjustment amount ΔTb, a current second transmission timing T2 is adjusted by ΔTb to obtain the first transmission timing, wherein the first transmission timing is T2−ΔTb, and the second transmission timing is a transmission timing for transmission from the second node to the first node; or in a case where the synchronization adjustment information is the third adjustment amount ΔTc, the current first transmission timing Told is adjusted by ΔTc to obtain a new first transmission timing, wherein the new first transmission timing is Told−ΔTc. ### Claim 15 (depends on 13) The transmission timing determination method of claim 13, wherein in a case where the mode indication information indicates the mode two, the time adjustment information comprises one of a timing advance amount TA or a change adjustment amount ΔTA; wherein the change adjustment amount ΔTA is a change amount relative to a previous timing advance amount TA; the adjusting the first transmission timing of the second node is to adjust the first transmission timing according to the mode two, and an adjustment of the mode two comprises one of: in a case where the time adjustment information is the timing advance amount TA, the downlink receiving timing T1 is advanced according to the timing advance amount TA to obtain the first transmission timing, wherein the first transmission timing is T1−TA−Ta_offset, and Ta_offset is a pre-configured TA offset; or in a case where the time adjustment information is the change adjustment amount ΔTA, an adjustment is performed according to the change adjustment amount ΔTA and the previous timing advance amount TAold to obtain the first transmission timing, wherein the first transmission timing is T1−TAold−ΔTA−Ta_offset, and Ta_offset is a pre-configured TA offset. ### Claim 16 (depends on 13) The transmission timing determination method of claim 13, wherein in a case where the mode indication information indicates the mode three, the time adjustment information comprises one of a timing advance amount TA or a change adjustment amount ΔTA; wherein the change adjustment amount ΔTA is a change amount relative to a previous timing advance amount TA; the adjusting the first transmission timing of the second node is to adjust the first transmission timing according to the mode three, and an adjustment of the mode three comprises one of: in a case where the time adjustment information is the timing advance amount TA, the downlink receiving timing T1 is advanced according to the timing advance amount TA to obtain the first transmission timing, wherein the first transmission timing is T1−TA/2; or in a case where the time adjustment information is the change adjustment amount ΔTA, an adjustment is performed according to the change adjustment amount ΔTA and the previous timing advance amount TAold to obtain the first transmission timing, wherein the first transmission timing is T1−(TAold+ΔTA)/2. ### Claim 17 (depends on 6) The transmission timing determination method of claim 6, further comprising: issuing the received synchronization type indication information to a subordinate node or a terminal, wherein the subordinate node is a child node of the second node, and the terminal is a subordinate device of the second node. ### Claim at position 18 -19. (canceled) ### Claim 20 (depends on 1) A communication device, comprising a processor, a memory, a communication unit, and a communication bus; the communication bus is configured to implement a wireless communication connection among the processor, the communication unit and the memory; the processor is configured to execute one or more first programs stored in the memory, to implement steps of the transmission timing determination method of claim 1. ### Claim 21 (depends on 1) A computer-readable storage medium, storing one or more first computer programs, wherein the one or more first computer programs are executable by one or more processors, to implement steps of the transmission timing determination method of claim 1. ### Claim 22 (depends on 5) A communication device, comprising a processor, a memory, a communication unit, and a communication bus; the communication bus is configured to implement a wireless communication connection among the processor, the communication unit and the memory; the processor is configured to execute one or more second programs stored in the memory, to implement steps of the transmission timing determination method of claim 5. ### Claim 23 (depends on 5) A computer-readable storage medium, storing one or more second computer programs, wherein the one or more second computer programs are executable by one or more processors, to implement steps of the transmission timing determination method of claim 5.