Remote UE Handover Using Target Relay Serving Cell Reference
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Solution Overview
Problem
In wireless communication systems, handover failures occur when a relay UE's serving cell changes, causing service discontinuity during base station transitions, as existing methods fail to account for this cell change, leading to instability in sidelink communication.
Innovation Solution
A method where a remote UE determines whether to hand over to a target relay UE based on the serving cell of the target relay UE, using the serving cell as a reference parameter to avoid handover failures by initiating or prohibiting the handover accordingly, and communicating this decision to the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the remote UE performs handover to a target relay UE without checking the serving cell, then the handover process is simpler and faster, but handover failures occur when the relay UE's serving cell changes
Solution Approach 1:
The remote UE performs preliminary checking of the target relay UE's serving cell before executing the handover. The UE determines whether the target relay UE's serving cell is the same as its current serving cell in advance, preventing handover failures caused by serving cell changes during the handover process.
2Reliability
If the remote UE checks the serving cell of the target relay UE before handover, then handover reliability is improved, but the handover procedure becomes more complex
Solution Approach 1:
The patent applies local quality by performing the serving cell check only at the specific decision point during handover procedure, rather than throughout the entire process. The remote UE checks whether the target relay UE's serving cell matches its current serving cell, adding complexity only where necessary to ensure reliability.
3Stability of the object's composition
If the remote UE prohibits handover when serving cells differ, then service continuity is maintained, but handover opportunities are lost
Solution Approach 1:
The handover decision mechanism is made dynamic by conditioning it on the serving cell match status. The remote UE adaptively determines whether to proceed with handover based on real-time serving cell information, allowing handover when conditions are favorable and preventing it when conditions are unfavorable, thus balancing stability and flexibility.
Data Source
AI summary
Provided in the present disclosure are a relay UE handover method and apparatus, and a communication device and a readable storage medium, which are applied to the terminal field of wireless communications. The relay UE handover method comprises: on the basis of a serving cell of a target relay UE, determining whether to hand over to the target relay UE. In the present disclosure, when a remote UE learns that same is required to hand over to a target relay UE, it is determined, on the basis of a serving cell of a remote target relay UE, whether to hand over to the target relay UE. That is to say, the serving cell of the target relay UE is taken as a reference parameter for handover. Therefore, the failure of remote UE handover caused by changing of the serving cell of the relay UE can be avoided, thereby improving the stability of a wireless communication system.