METHOD, DEVICE, AND SYSTEM FOR HANDOVER OF USER EQUIPMENT GROUP

摘要

A method includes: determining, according to a measurement report of agent UE and a measurement report of UE in a UE group that are sent by the agent UE, whether the agent UE and the UE in the UE group need to be handed over; when the agent UE and at least one piece of UE in the UE group need to be handed over, sending a handover request message to a T-eNB; receiving a handover configuration message sent by the T-eNB and sending the handover configuration message to the agent UE; and receiving a context release message sent by the T-eNB, and releasing context resources of the agent UE and the to-be-handed-over UE.

主权项

1. A method for handover of a user equipment group, the method comprising:
determining, according to a measurement report of an agent user equipment (UE) and a measurement report of UE in a UE group that are sent by the agent UE, whether the agent UE and each UE in the UE group need to be handed over, wherein the UE group comprises the agent UE and each UE; when the agent UE and at least one UE in the UE group need to be handed over, sending a handover request message to a target base station (T-eNB), wherein the handover request message comprises at least context information of the agent UE and the at least one to-be-handed-over UE that needs to be handed over and a cooperative relationship between the agent UE and the to-be-handed-over UE; receiving a handover configuration message sent by the T-eNB and sending the handover configuration message to the agent UE, wherein the handover configuration message comprises at least a physical random access channel (PRACH) resource and a cell radio network temporary identifier (C-RNTI) that are allocated by the T-eNB to the agent UE and a C-RNTI that is allocated by the T-eNB to each to-be-handed-over UE that needs to be handed over; receiving a context release message sent by the T-eNB, and releasing context resources of the agent UE and the to-be-handed-over UE; initiating random access to the T-eNB according to the PRACH resource, and establishing an uplink synchronous connection to the T-eNB, wherein after the initiating random access to the T-eNB according to the PRACH resource, the method further comprises: if the initiating random access to the T-eNB according to the PRACH resource fails, initiating a synchronous-connection re-establishment request; and if synchronous-connection re-establishment fails, sending a re-establishment notification message to each to-be-handed-over UE in the UE group, to instruct each to-be-handed-over UE in the UE group to separately establish a synchronous connection.