US 12,250,736 B2
Communication method and system, base station and terminal
Shengnan Liu, Beijing (CN); Zheng Jiang, Beijing (CN); Peng Chen, Beijing (CN); and Xiaoming She, Beijing (CN)
Assigned to CHINA TELECOM CORPORATION LIMITED, Beijing (CN)
Appl. No. 17/772,804
Filed by CHINA TELECOM CORPORATION LIMITED, Beijing (CN)
PCT Filed Jul. 13, 2020, PCT No. PCT/CN2020/101565
§ 371(c)(1), (2) Date Apr. 28, 2022,
PCT Pub. No. WO2021/082527, PCT Pub. Date May 6, 2021.
Claims priority of application No. 201911042164.X (CN), filed on Oct. 30, 2019.
Prior Publication US 2022/0361068 A1, Nov. 10, 2022
Int. Cl. H04W 36/00 (2009.01); H04W 76/10 (2018.01); H04W 36/14 (2009.01)
CPC H04W 76/10 (2018.02) [H04W 36/0058 (2018.08); H04W 36/0061 (2013.01); H04W 36/00838 (2023.05); H04W 36/14 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A communication method, comprising:
sending, by a first Base Station (BS), a broadcast message, which comprises: a Network Identifier (NID) and a Public Land Mobile Network Identifier (PLMN ID), which correspond to each of one or more Standalone Non-Public Networks (SNPNs) supported by the first BS;
receiving, by the first BS, a connection request sent from a terminal, wherein the connection request represents that the first BS supports at least one of one or more SNPNs subscribed by the terminal;
establishing, by the first BS, a Radio Resource Control (RRC) connection with the terminal according to the connection request;
receiving, by the first BS, a RRC connection setup complete message sent from the terminal, wherein the RRC connection setup complete message carries a NID and a PLMN ID, which correspond to a SNPN that the terminal selects to access; and
connecting, by the first BS, the terminal to the SNPN that the terminal selects to access, according to the RRC connection setup complete message;
receiving, by the first BS, a measurement report sent from the terminal, wherein the measurement report comprises: a NID, a PLMN ID and signal quality information of a cell, which correspond to a SNPN that the terminal applies to access;
making a handover judgment and determining a cell corresponding to a second BS as a target cell according to the measurement report by the first BS;
sending, by the first BS, a handover required message to a core network element, to initiate a handover request to the second BS through the core network element, wherein the handover required message comprises the NID and the PLMN ID, which correspond the SNPN that the terminal applies to access, and an identifier of the target cell, in a case where the first BS judges that a handover condition is met; and
receiving, by the first BS, a handover command returned by the core network element, and executing a handover process, wherein the handover command represents that the target cell supports the SNPN that the terminal applies to access.