Slice-Based Cell Reselection in 5G Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in enhancing the cell reselection procedure, particularly in the context of network slicing.
Innovation Solution
The proposed method involves a terminal and a base station exchanging information through RRC release messages and system information blocks to configure slice-based cell reselection. This includes transmitting and receiving information on cell reselection priorities, carrier frequencies, and slice groups to determine the appropriate cell reselection priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network slicing is implemented to support diverse services, then service differentiation and quality are improved, but cell reselection complexity increases
Solution Approach 1:
The patent segments the cell reselection process into multiple stages: first evaluating cells based on traditional criteria (signal strength, mobility), then applying slice-specific filtering and prioritization. This segmentation allows the system to maintain simple base reselection logic while adding slice-awareness as an additional layer, thus improving service differentiation without overwhelming complexity.
Solution Approach 2:
The patent applies different reselection criteria and priorities to different network slices based on their specific service requirements. Each slice can have customized reselection parameters (e.g., higher priority for URLLC slices requiring low latency, different thresholds for eMBB slices). This local quality approach enables service differentiation by tailoring reselection behavior to specific slice needs while keeping the overall framework manageable.
2Reliability
If slice-based cell reselection is implemented, then service quality and reliability are improved, but information processing complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring slice information, supported frequency lists, and priority mappings in the UE before cell reselection occurs. The network provides advance information about which slices are supported on which frequencies and their associated priorities. This preliminary preparation reduces the computational burden during actual reselection, as the UE can use pre-established lookup tables and criteria rather than performing complex real-time calculations.
Solution Approach 2:
The patent introduces intermediary data structures and processing layers that mediate between the complex slice management requirements and the simpler reselection execution. These intermediaries include slice-to-frequency mapping tables, priority conversion mechanisms, and filtered cell lists that simplify the reselection algorithm. The intermediary layer absorbs the complexity of slice management while presenting a simplified interface to the reselection process.
3Measurement precision
If dedicated signaling is used for slice information, then information accuracy for individual UEs is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by providing slice information at different granularities: network-wide slice configurations are broadcast in system information (SIBs), while UE-specific slice preferences and restrictions are provided through dedicated RRC signaling. This partial approach ensures that essential information is widely distributed (reducing overhead) while allowing precise UE-specific customization when needed, thus balancing accuracy requirements with overhead constraints.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose methods N for handling a slice based cell reselection in a wireless network by a CE (100). The method includes receiving a slice based cell reselection information from a dedicated signaling message. Further, the method includes receiving a slice based cell reselection information from a broadcast signaling message. Further, the method includes storing and applying the slice based cell reselection information received from the dedicated signaling message and a part of the slice based cell reselection information from the broadcast signaling message. Further, the method includes avoiding storing and applying the at least one slice based priority for at least one frequencies and the at least one priority for the at least one frequency received from the broadcast signaling message.