Network Slice Handover Optimization via Radio Environment Feedback
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Solution Overview
Problem
In network slicing, handovers to target cells that do not support required network slices or services can result in service interruptions and suboptimal target cell selection, due to limitations in static network slice support information and mobility pattern mismatches, leading to radio link failures and poor quality of experience.
Innovation Solution
The system determines execution conditions for handover to a target cell, stores and transmits radio environment information when the target cell does not support the required network slice or service, allowing for optimal handover and root cause analysis to minimize service interruptions and improve mobility robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover to target cell is performed based on static network slice support information, then handover decision is made quickly, but service interruption occurs when target cell does not support required network slice
Solution Approach 1:
The system performs preliminary actions by storing radio environment information at the time of handover execution and transmitting it to the target cell after handover. This allows the network to prepare and verify network slice support information in advance, preventing service interruption while maintaining efficient handover decisions.
Solution Approach 2:
The system implements feedback mechanisms by transmitting stored radio environment information to the target cell after handover, enabling the target cell to verify its ability to support required network slices and services. This feedback loop ensures service continuity while allowing quick handover decisions.
2Productivity
If handover execution conditions are evaluated without considering network slice support, then handover is performed faster, but mobility robustness deteriorates due to mismatch with UE requirements
Solution Approach 1:
The system stores radio environment information at the time of handover execution as a preliminary action, enabling subsequent verification of network slice support without delaying the handover execution itself. This maintains both fast handover execution and robust mobility by ensuring target cell compatibility.
Solution Approach 2:
The system dynamically adapts handover evaluation by considering network slice support information in conjunction with radio environment conditions. This dynamic approach ensures that handover decisions reflect both speed requirements and service continuity needs, improving mobility robustness without sacrificing execution speed.
3Ease of operation
If target cell selection is based solely on radio measurements, then handover is simpler and faster, but service quality deteriorates due to unsupported network slices
Solution Approach 1:
The system performs preliminary storage of radio environment information and subsequent transmission to the target cell, enabling comprehensive evaluation of both radio conditions and network slice support. This maintains operational simplicity while significantly improving service quality through verified compatibility.
Solution Approach 2:
The system makes the handover mechanism universal by handling both radio measurement evaluation and network slice support verification within a unified process. This multi-functional approach simplifies operation while ensuring service quality through comprehensive target cell assessment.
Data Source
AI summary
A UE may determine that at least one execution condition for performing handover from a source cell to a target cell is met and the target cell does not support at least one of a network slice or a service the UE requires; based on the determination, store information related to a radio environment associated with the UE; perform handover to the target cell; and transmit the stored information to the target cell after the handover. A target network node may receive the transmitted information; and provide the information to a source network node. The source network node may receive the information; and perform a root cause analysis for the handover execution of the user equipment based, at least partially, on the received information.