UE Identification Relay for Lower-Layer Triggered Mobility Handover
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Solution Overview
Problem
Conventional lower-layer triggered mobility (LTM) techniques face challenges in identifying user equipment (UE) during handover procedures involving multiple candidate network entities, leading to inefficient communication transitions between cells.
Innovation Solution
A first network entity forwards a UE ID allocated by a second network entity to a third network entity, along with an indication of the second network entity, to facilitate UE identification during handover procedures, and may operate as a proxy between the second and third network entities to ensure seamless communication transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LTM techniques are used for handover procedures, then the mobility process can be completed, but UE identification becomes difficult when multiple candidate network entities are involved
Solution Approach 1:
The first network entity serves as an intermediary that receives the UE ID from the second network entity and forwards it to the third network entity. This mediator role resolves the identification difficulty by ensuring the UE ID is properly communicated across multiple network entities involved in the handover procedure, maintaining reliability without increasing procedural complexity
2Productivity
If UE identification is improved during handover, then communication transitions become smoother, but additional signaling messages are required between network entities
Solution Approach 1:
The UE ID is allocated and communicated between network entities in advance during the handover preparation phase, before the actual handover execution. This preliminary action ensures that when the handover occurs, all network entities already have the necessary identification information, improving handover efficiency without requiring additional signaling messages during the critical handover moment
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first network entity communicates, with a third network entity, a first message indicating an identifier (ID) associated with a lower-layer triggered mobility (LTM) procedure for a user equipment (UE), the ID for indicating that the UE is associated with the LTM procedure between the first network entity and a second network entity. The first network entity transmits, to the UE, a second message indicating to perform a cell switch operation from communications with the first network entity to the second network entity or the third network entity in accordance with the LTM procedure.