Multicast Service Handover Using Target Base Station Feedback
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Solution Overview
Problem
Existing communication technologies face challenges in maintaining continuity of multicast services during UE movement, particularly in switching between multicast and unicast modes, leading to long delays and service interruptions.
Innovation Solution
A mobility management method involving a source base station that receives a report message from a terminal device with a measurement result, and transmits a handover command to switch to a target base station, ensuring the target base station supports the required multicast services, and includes forwarding multicast service data through established tunnels to maintain service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unicast connection is established from core network to RAN for switching between multicast and unicast, then the switching capability is achieved, but the delay increases significantly
Solution Approach 1:
The patent establishes a unicast connection between the RAN and core network in advance, before handover is needed. This preliminary setup ensures that when multicast service handover is required, the connection is already in place, eliminating the delay of establishing a new connection during switching.
2Reliability
If multicast service data is transmitted during UE movement, then service continuity is maintained, but service interruptions and delays occur without proper handover management
Solution Approach 1:
The patent implements a feedback mechanism where the target base station reports multicast service capability information to the source base station. Based on this feedback, the source base station makes an informed handover decision, selecting a target base station that can continue providing the required multicast services, thereby maintaining service continuity without interruptions.
Solution Approach 2:
The target base station is pre-configured with multicast service capability information before handover execution. This preliminary preparation ensures that when handover occurs, the target base station is already ready to continue transmitting multicast service data without interruption.
3Speed
If base station selection is made without considering multicast service support, then handover speed is improved, but multicast service continuity is lost
Solution Approach 1:
The patent employs feedback from the target base station regarding its multicast service capabilities. This feedback is integrated into the handover decision-making process, enabling the source base station to quickly identify and select a suitable target base station that supports the required multicast services, thus maintaining both speed and reliability.
Solution Approach 2:
The target base station pre-provides multicast service capability information to the source base station before handover decision. This preliminary information availability accelerates the handover decision process while ensuring that the selected target base station can maintain multicast service continuity.
Data Source
AI summary
The present disclosure provides a mobility management method, a source base station, a target base station, and a terminal device. The method includes: receiving a report message from a terminal device, where the terminal device is a terminal device that receives data of a first multicast service, and the report message includes a measurement result; and transmitting a handover command to the terminal device, where the handover command is used to instruct the terminal device to switch to a target base station, and the target base station is determined based on the measurement result.