# US 12,192,939 B2 · Transmission control method and apparatus, terminal, base station, communication system and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,939 B2 - Document ID: US12192939B2 - Status: Granted - Kind: B2 - Application number: 17/599,460 - Filed: 2020-03-18 - Published: 2022-06-23 - Granted: 2025-01-07 - Earliest claimed: 2019-03-28 - Assignees: Zte Corporation - Applicants: ZTE Corporation - Inventors: Kun Liu; Bo Dai; Xiubin Sha; Huiying Fang; Weiwei Yang; Luanjian Bian; Youjun Hu - Web page: https://patentgrep.com/patent/US12192939B2 ## CPC - H04W 56/0045: {compensating for timing error by altering transmission time} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0841: {with collision treatment} - H04W 76/20: Manipulation of established connections - H04W 76/27: Transitions between radio resource control [RRC] states - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A transmission control method and apparatus, a terminal device, a base station, a communication system, and a non-transitory computer-readable storage medium are disclosed. The transmission control method may include: judging validation of Timing Advance (TA); and initiating a random access procedure in response to the TA being in an invalid state. ## Claims ### Claim 1 A transmission control method, comprising: judging validation of Timing Advance (TA); and initiating a random access procedure in response to the TA being in an invalid state; wherein judging validation of TA comprises: determining that the TA is in the invalid state in response to a determination that a specific condition is satisfied at a judgment time; wherein determining that a specific condition is satisfied at a judgment time comprises: determining that at least M1 judgment times in a second set of judgment times, a timer has expired; where M1 is an integer greater than or equal to 1; or determining that a timer does not expire at a judgment time in a second set of judgment times; and determining that at least K1 times before the judgment time in the second set of judgment times, a variation of a first measurement value exceeds a threshold value; where K1 is an integer greater than or equal to 1; and the judgment time in the second set of judgment times satisfies at least one of: an interval from a time domain position of a resource utilized by a next first type channel being greater than or equal to a first time length; or an interval from a time domain position of a resource utilized by a next first type channel being less than or equal to a second time length. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first measurement value comprises at least one selected from a group consisting of Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Downlink Signal to Interference plus Noise Ratio (SINR), Downlink Signal to Noise Ratio (SNR), Uplink SNR, Downlink path loss, and Uplink path loss. ### Claim 3 (depends on 1) The method according to claim 1, wherein judging validation of TA further comprises: determining that the TA is in a valid state in response to a detection that a serving cell or a camping cell where a terminal device is located has not changed. ### Claim 4 (depends on 1) The method according to claim 1, wherein initiating a random access procedure comprises: sending a third message of the random access procedure to a base station, wherein a Radio Resource Control (RRC) message carried by the third message carries indication information for indicating RRC Release. ### Claim 5 (depends on 1) The method according to claim 1, wherein initiating a random access procedure comprises: receiving a fourth message of the random access procedure from a base station, wherein the fourth message comprises an RRC Connection Release message. ### Claim 6 (depends on 1) The method according to claim 1, wherein initiating a random access procedure comprises: sending a third message of the random access procedure to a base station, wherein the third message carries terminal device identification information, and the terminal device identification information is sent by a Control Element of Media Access Control (MAC CE). ### Claim 7 (depends on 1) The method according to claim 1, further comprising: receiving Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information sent by a base station for transmitting data on a first type channel, wherein the HARQ-ACK information is carried in Downlink Control Information (DCI) in a downlink control channel, and the HARQ-ACK information comprises a first kind of Acknowledgement (ACK) indication information or a second kind of ACK indication information; stopping, by a terminal device, a detection on the downlink control channel, in response to the HARQ-ACK information being the first kind of ACK indication information, where the HARQ-ACK information indicates that the data transmitted by the first type channel is correctly received; and performing, by a terminal device, a detection on the downlink control channel, in response to the HARQ-ACK information being the second kind of ACK indication information, where the HARQ-ACK information indicates that the data transmitted by the first type channel is correctly received. ### Claim 8 (depends on 1) The method according to claim 1, further comprising: receiving adjustment information for a first type channel sent by a base station, wherein the adjustment information is carried in DCI in a downlink control channel, and the adjustment information comprises a value determined according to a power headroom corresponding to the first type channel. ### Claim 9 (depends on 1) The method according to claim 1, further comprising: in response to the TA being in a valid state, enabling the terminal device to utilize the first type channel for data transmission in RRC_IDLE or an inactive state of RRC (RRC_INACTIVE). ### Claim 10 (depends on 1) A non-transitory computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the transmission control method according to claim 1.