US 12,143,873 B2
Mobility robustness implementation method, device, and apparatus
Aijuan Liu, Beijing (CN); Jing Fu, Beijing (CN); and Nan Yan, Beijing (CN)
Assigned to Datang Mobile Communications Equipment Co., Ltd., Beijing (CN)
Appl. No. 17/635,069
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Aug. 12, 2020, PCT No. PCT/CN2020/108702
§ 371(c)(1), (2) Date Feb. 14, 2022,
PCT Pub. No. WO2021/031959, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 201910760398.1 (CN), filed on Aug. 16, 2019.
Prior Publication US 2022/0295358 A1, Sep. 15, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 36/14 (2009.01); H04W 36/30 (2009.01)
CPC H04W 36/0058 (2018.08) [H04W 36/144 (2023.05); H04W 36/302 (2023.05)] 15 Claims
OG exemplary drawing
 
1. A mobility robustness method, comprising:
determining, by a first network device, first measurement information after during a terminal performing inter-system handover; and
sending, by the first network device, the first measurement information to a second network device, to enable the second network device to notify the terminal to continue measuring a cell signal under a source system of the inter-system handover according to the first measurement information;
wherein the first network device belongs to a source cell of the inter-system handover, and the second network device belongs to a target cell of the inter-system handover;
wherein after the sending, by the first network device, the first measurement information to the second network device, the method further comprises:
in a case that the first network device receives unnecessary HO sent by a third network device, determining that the unnecessary HO occurs when the terminal performs the inter-system handover, wherein the unnecessary HO carries a cell identifier of a cell, meeting a second condition, in cells of the source system;
wherein the cell meeting the second condition is determined by the third network device after receiving second measurement information sent by the second network device, the second measurement information is sent by the second network device after the intra-system handover is performed within measurement time of the terminal measuring the cell signal under the source system, and the third network device belongs to the target cell of the intra-system handover; wherein
in a case that the second measurement information comprises a threshold value of a cell level, a threshold value of beams obtaining cell signal quality and a maximum quantity of beams exceeding the threshold value, the second condition comprises that cell signal quality measured within a preset duration is greater than or equal to the threshold value of the cell level; and
in a case that the second measurement information comprises a threshold value of beams and a quantity of beams greater than a threshold value of beams needing to be measured by the terminal, the second condition comprises that a measured quantity of beams greater than the threshold value of the beams is greater than or equal to a preset threshold.