Network Slice-Aware Cell Reselection for Service Reliability
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Solution Overview
Problem
Existing cell reselection methods in 5G networks based on channel quality may lead to the selection of cells that do not support the required network slice, affecting service transmission and user experience.
Innovation Solution
The terminal device performs cell reselection based on network slice information, frequency point priority, and channel quality information to ensure the selected cell meets the network slicing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell reselection is performed based on channel quality criteria, then the terminal device can select a cell with high channel quality, but the selected cell may not support the required network slice, affecting service transmission
Solution Approach 1:
The patent changes the cell reselection parameters from only channel quality metrics to include network slice support information. The terminal device now considers both channel quality and network slice compatibility when performing cell reselection, ensuring that the selected cell meets both quality and service requirements simultaneously.
Solution Approach 2:
The patent applies preliminary action by having the terminal device check network slice support information before finalizing cell reselection. The device evaluates whether the target cell supports the required network slice in advance, preventing service transmission issues that would occur if slice support were not verified beforehand.
2Speed
If cell reselection is performed based on channel quality alone, then the terminal device can quickly identify high-quality cells, but the user experience is degraded when the selected cell does not support the required network slice
Solution Approach 1:
The patent modifies the cell reselection parameters to include network slice support information alongside channel quality metrics. This allows the terminal device to maintain fast reselection by using efficient evaluation criteria while ensuring the selected cell supports the required network slice, thereby preserving user experience.
Solution Approach 2:
The terminal device autonomously evaluates both channel quality and network slice support information during cell reselection without requiring additional network coordination. This self-service approach maintains reselection speed while ensuring the selected cell meets service requirements, protecting user experience.
3Device complexity
If the terminal device selects a cell with high channel quality without considering network slice information, then the cell reselection process is simple, but service transmission is affected when the cell does not support the required network slice
Solution Approach 1:
The patent changes the cell reselection parameters to include network slice support information. While this increases evaluation complexity, the patent manages this by using efficient information structures and evaluation methods, balancing the increased complexity against the critical need for service transmission reliability.
Solution Approach 2:
The patent introduces network slice support information as an intermediary criterion in the cell reselection process. This intermediary parameter acts as a filter that ensures only cells supporting the required network slice are considered, thereby guaranteeing service transmission reliability while managing process complexity through structured evaluation.
Data Source
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AI summary
A cell reselection method, a terminal device and a network device, which facilitate reselection of a cell meeting network slice requirements of the terminal device, thereby improving the user experience. The method comprises: a terminal device performing cell reselection according to first information, wherein the first information comprises at least one of network slice information of the terminal device, frequency point priority information, and channel quality information of at least one cell; the frequency point priority information is used for indicating priority information of a frequency point or a cell; and the at least one cell comprises a serving cell and/or a neighboring cell of the terminal device.