Handover Cell Prioritization for PDU Set Service Continuity
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Solution Overview
Problem
During handover procedures in wireless communication, UEs may be transferred to target cells that do not support the PDU sets they rely on, leading to service degradation or unavailability, which impacts user experience and network performance.
Innovation Solution
The UE and source cell prioritize handovers to neighboring cells based on their support for PDU set capabilities, using cell prioritization configurations to ensure seamless service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If handover procedures are performed without considering PDU set capability support, then handover speed is improved, but service continuity and reliability deteriorate
Solution Approach 1:
The source cell performs preliminary actions by obtaining capability information of neighboring cells before initiating handover. The network proactively collects and stores PDU set capability information of candidate target cells, enabling the UE to make informed handover decisions that ensure service continuity while maintaining fast handover execution.
Solution Approach 2:
The system implements feedback mechanisms where the UE reports measured information about neighboring cells to the source cell, and the source cell uses this feedback to select appropriate target cells. The network continuously monitors handover outcomes and uses this information to optimize future handover decisions, ensuring both speed and reliability.
2Reliability
If cell prioritization based on PDU set capability is implemented, then service continuity is improved, but device complexity increases
Solution Approach 1:
The system changes the parameters used for cell prioritization by introducing PDU set capability as a new criterion. Instead of relying solely on traditional handover parameters, the network and UE incorporate capability information about PDU set support, transforming the handover decision-making process to achieve more reliable service continuity.
Solution Approach 2:
The source cell acts as an intermediary that simplifies the complexity for the UE. By collecting and processing capability information of neighboring cells, the source cell provides prioritized lists of candidate cells to the UE, reducing the computational burden on the UE while ensuring reliable handover decisions.
3Reliability
If comprehensive cell measurement and evaluation is performed, then handover reliability is improved, but time consumption increases
Solution Approach 1:
The network performs preliminary actions by pre-collecting and storing capability information of neighboring cells. This advance preparation eliminates the need for time-consuming real-time capability assessment during handover, allowing the UE to quickly evaluate and select target cells based on pre-obtained information.
Solution Approach 2:
The system applies partial action by focusing measurement and evaluation resources on the most critical parameters for handover reliability. Instead of comprehensively measuring all possible cell parameters, the network and UE concentrate on PDU set capability and other essential factors, achieving reliable handovers with reduced time consumption.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a source cell, a candidate cell indication indicating one or more neighboring cells. The UE may receive a cell prioritization configuration that includes one or more rules for prioritizing the one or more neighboring cells in accordance with support for a packet data unit (PDU) set capability. The UE may transmit, to the source cell, a target cell indication indicating a target cell selected from among the one or more neighboring cells in accordance with the cell prioritization configuration. The UE may receive, from the source cell, a handover command for performing a handover procedure from the source cell to the target cell. Numerous other aspects are described.