Data transmission method and related device

A communication system, comprising:

• a first network device;
• and
• a second network device in communication with the first network device;
• and
• a third network device;
• wherein the first network device is configured to:
• receive first indication information from a terminal device, wherein the first indication information indicates information of a first duration, wherein the first duration corresponds to a duration from a moment of initialization of a last secondary base station change of the terminal device to a moment of a radio link failure between the terminal device and the second network device, the first network device is a master base station connected to the terminal device, the second network device is a target secondary base station of the last secondary base station change, and the third network device is a source secondary base station connected to the terminal device before the last secondary base station change;
• detect a mobility problem based on the first indication information, wherein the mobility problem comprises that the last secondary base station change of the terminal device is too early or is to a wrong cell, and wherein detecting the mobility problem based on the first indication information comprises:
• when the first duration is less than a first preset threshold, determining that the mobility problem is that the last secondary base station change of the terminal device is too early, or when the first duration is less than the first preset threshold, and a secondary base station to which the terminal device is reconnected is different from the third network device, determining that the last secondary base station change of the terminal device is to the wrong cell, and wherein the first preset threshold is configured by the second network device or the first network device;
• in response to detecting the mobility problem, when the last secondary base station change was triggered by the first network device, adjust a mobility parameter;
• and
• in response to detecting the mobility problem, when the last secondary base station change was triggered by the third network device, indicate to the third network device to adjust the mobility parameter.

A non-transitory computer readable storage medium storing executable instructions that are executable by at least one processor, wherein executing the instructions causes a first network device to be enabled to:

• receive first indication information from a terminal device, wherein the first indication information indicates information of a first duration, wherein the first duration corresponds to a duration from a moment of initialization of a last secondary base station change of the terminal device to a moment of a radio link failure between the terminal device and a second network device, the first network device is a master base station connected to the terminal device, the second network device is a target secondary base station of the last secondary base station change, and a third network device is a source secondary base station connected to the terminal device before the last secondary base station change;
• detect a mobility problem based on the first indication information, wherein the mobility problem comprises that the last secondary base station change of the terminal device is too early or to a wrong cell, and wherein detecting the mobility problem based on the first indication information comprises:
• when the first duration is less than a first preset threshold, determining that the mobility problem is that the last secondary base station change of the terminal device is too early, or when the first duration is less than the first preset threshold, and a secondary base station to which the terminal device is reconnected is different from the third network device, determining that the last secondary base station change of the terminal device is to the wrong cell;
• in response to detecting the mobility problem, when the last secondary base station change was triggered by the first network device, adjust a mobility parameter;
• and
• in response to detecting the mobility problem, when the last secondary base station change was triggered by the third network device, indicate to the third network device to adjust the mobility parameter.