Transmission control method and apparatus, terminal, base station, communication system and storage medium

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.