SnMF Handover Management for ISAC Sensing Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in seamlessly managing sensing service configurations during user equipment (UE) handovers, leading to gaps in sensing tasks and potential interruptions in sensing services.
Innovation Solution
A network node is configured to handle SU association requests for handovers between different sensing service management function (SnMF) service areas, including transmitting messages for SU association acceptance or rejection, and providing routing IDs for SnMF nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE is configured with a new sensing configuration upon handover to a target cell, then the sensing service can be maintained in the new service area, but there is a gap in sensing tasks during the transition period
Solution Approach 1:
The target SnMF node prepares the sensing configuration in advance before the UE actually handovers. The source SnMF node forwards the existing sensing configuration to the target SnMF node beforehand, so that when the handover occurs, the sensing configuration is already ready and no gap in sensing tasks occurs.
2Adaptability or versatility
If the existing sensing configuration is discarded when the UE leaves the source cell, then the target cell can use its own sensing configuration, but sensing tasks are interrupted during the transition
Solution Approach 1:
Instead of completely discarding the existing sensing configuration when the UE leaves the source cell, the configuration is preserved and forwarded to the target SnMF node. This allows the sensing configuration to be recovered and continuously applied in the target cell without interruption.
3Adaptability or versatility
If a new sensing configuration is applied immediately upon handover, then the sensing service adapts to the new service area, but the transition causes interruption in sensing tasks
Solution Approach 1:
The target SnMF node applies the sensing configuration in advance before the UE handover occurs. By preparing and applying the configuration beforehand, the system ensures that when the UE actually handovers, the sensing tasks continue without interruption.
4Reliability
If the network waits for handover completion before applying new sensing configuration, then configuration errors are avoided, but sensing service is delayed
Solution Approach 1:
The network applies the sensing configuration in advance before the handover completion. The source SnMF node forwards the configuration to the target SnMF node beforehand, allowing the configuration to be ready and applied immediately upon handover without causing delays.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. Some aspects relate to changing a sensing service management function (SnMF) in association with a handover of a UE configured as a sensing unit (SU) for an integrated sensing and communication (ISAC) service. In some aspects, as the SU is handed over to a target cell, a mobility service may request a new configuration associated with the target cell and may facilitate associating the SU with a target SnMF. In some aspects, a common sensing repository may facilitate identifying a target SnMF and associating the SU therewith. In some aspects, an SnMF may track changes in a sensing target and/or area to be sensed and may facilitate changing SnMFs and/or SUs to accommodate the changes.