US 12,495,340 B2
Handover method and device
Jiancheng Sun, Beijing (CN); Ye Zhou, Beijing (CN); Dajun Zhang, Beijing (CN); and Aijuan Liu, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 18/013,888
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed May 13, 2021, PCT No. PCT/CN2021/093697
§ 371(c)(1), (2) Date Dec. 29, 2022,
PCT Pub. No. WO2022/001413, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 202010637065.2 (CN), filed on Jul. 3, 2020.
Prior Publication US 2023/0308972 A1, Sep. 28, 2023
Int. Cl. H04W 36/08 (2009.01); H04W 36/00 (2009.01)
CPC H04W 36/08 (2013.01) [H04W 36/0072 (2013.01); H04W 36/00835 (2018.08)] 20 Claims
OG exemplary drawing
 
1. A handover method, comprising:
determining, by a distributed unit (DU), that an inter central unit (CU) handover is required and sending an F1 interface establishment request to a target CU, wherein the F1 interface establishment request indicates that an establishment cause is the inter CU handover performed by the DU;
upon receiving an F1 interface establishment response returned by the target CU, sending, by the DU, a message for instructing the DU to perform the inter CU handover, to a source CU; and
the DU being handed over from the source CU to the target CU.