IP Library › Granted Patent US 12701468
Granted Patent B2
US 12701468 · App. 17/651,091 · Granted Aug 4, 2026

Data transmission method and related device

Inventors: Xiaoli Shi (Shanghai, CN); Wenjie Peng (Shanghai, CN); Mingzeng Dai (Shenzhen, CN); Rui Wang (Shanghai, CN)
Assignee: Huawei Technologies Co., Ltd.
H04W36/0027H04W36/00837H04W36/08H04W36/00698
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Quick Facts
Patent No.
US 12701468
App. No.
17/651,091
Granted
Aug 4, 2026
Kind
B2
Abstract

Embodiments of this application disclose a data transmission method and a related device. The method includes: A first network device receives first indication information from a second network device, where the first indication information is used to indicate that a terminal device is successfully handed over from a third network device to the first network device or that the third network device has released a context of the terminal device; and the first network device detects a mobility problem based on the first indication information. According to the method provided in the embodiments of this application, a target SN may detect a mobility problem based on indication information sent by an MN.

Claims (53)

1 . A method, comprising:

receiving, by a first network device, 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;

detecting, by the first network device, 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, by the first network device, 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, by the first network device, 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; and

in response to detecting the mobility problem, when the last secondary base station change was triggered by the first network device, adjusting, by the first network device, 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, indicating, by the first network device, the third network device to adjust the mobility parameter.

2 . The method according to claim 1 ,

wherein detecting, by the first network device, the mobility problem based on the first indication information further comprises:

when the first duration is greater than the first preset threshold, determining, by the first network device, that the last secondary base station change of the terminal device is too late.

3 . The method according to claim 1 , further comprising:

sending a release request to the third network device, wherein the release request is used to request the third network device to release a context of the terminal device.

4 . The method according to claim 1 , wherein the first indication information further indicates the radio link failure between the terminal device and the second network device.

5 . The method according to claim 1 , wherein the first preset threshold is configured by the second network device.

6 . The method according to claim 1 , wherein the first preset threshold is configured by the first network device.

7 . The method according to claim 1 , further comprising:

sending, by the first network device, second indication information to the second network device, wherein the second indication information indicates that the terminal device is successfully handed over from the third network device to the second network device, or the third network device has released a context of the terminal device;

sending, by the first network device, third indication information to the second network device, wherein the third indication information indicates a radio link failure between the terminal device and the second network device; and

receiving, by the first network device, fourth indication information from the second network device, wherein the fourth indication information indicates that the last secondary base station change of the terminal device is too early, and the last secondary base station change of the terminal device being too early is determined by the second network device based on a duration between a moment at which the second network device receives the fourth indication information and a moment at which the second network device receives the third indication information falls within a second preset threshold.

8 . 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.

9 . The communication system according to claim 8 , wherein the first network device is further configured to:

when the first duration is greater than the first preset threshold, determine that the last secondary base station change of the terminal device is too late.

10 . The communication system according to claim 8 , wherein the communication system further comprises the terminal device.

11 . The communication system according to claim 8 , wherein the third network device is configured to receive a release request, wherein the release request requests the third network device to release a context of the terminal device.

12 . The communication system according to claim 8 , wherein the first indication information further indicates the radio link failure between the terminal device and the second network device.

13 . The communication system according to claim 8 , wherein the first preset threshold is configured by the second network device.

14 . The communication system according to claim 8 , wherein the first network device is further configured to:

send second indication information to the second network device, wherein the second indication information indicates that the terminal device is successfully handed over from the third network device to the second network device, or the third network device has released a context of the terminal device;

send third indication information to the second network device, wherein the third indication information indicates a radio link failure between the terminal device and the second network device; and

receive fourth indication information from the second network device, wherein the fourth indication information indicates that the last secondary base station change of the terminal device is too early, and the last secondary base station change of the terminal device being too early is determined by the second network device based on a duration between a moment at which the second network device receives the fourth indication information and a moment at which the second network device receives the third indication information falls within a second preset threshold.

15 . 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.

16 . The non-transitory computer readable storage medium according to claim 15 , wherein detecting the mobility problem based on the first indication information further comprises:

when the first duration is greater than the first preset threshold, determining, by the first network device, that the last secondary base station change of the terminal device is too late.

17 . The non-transitory computer readable storage medium according to claim 15 , wherein executing the instructions causes the first network device to be further enabled to:

send a release request to the third network device, wherein the release request is used to request the third network device to release a context of the terminal device.

18 . The non-transitory computer readable storage medium according to claim 15 , wherein the first indication information further indicates the radio link failure between the terminal device and the second network device.

19 . The non-transitory computer readable storage medium according to claim 15 , wherein executing the instructions causes the first network device to be further enabled to:

send second indication information to the second network device, wherein the second indication information indicates that the terminal device is successfully handed over from the third network device to the second network device, or the third network device has released a context of the terminal device;

send third indication information to the second network device, wherein the third indication information indicates a radio link failure between the terminal device and the second network device; and

receive fourth indication information from the second network device, wherein the fourth indication information indicates that the last secondary base station change of the terminal device is too early, and the last secondary base station change of the terminal device being too early is determined by the second network device based on a duration between a moment at which the second network device receives the fourth indication information and a moment at which the second network device receives the third indication information falls within a second preset threshold.