Slice-Based Cell Reselection with Grouped PCI Lists
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Solution Overview
Problem
Existing mechanisms for slice-based cell reselection in wireless networks suffer from significant signaling overhead due to repeated information in the Physical Cell Identity (PCI) list, leading to inefficient inter-device connection setups and synchronization issues.
Innovation Solution
A method and apparatus for cell reselection with slices that reduce signaling overhead by transmitting unique slice information lists for different slice groups, allowing the UE to identify allowed and excluded cell lists based on these lists and determine slice-based reselection priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network apparatus transmits separate PCI lists for each slice group, then the UE can accurately identify allowed and excluded cells for each slice, but the signaling overhead increases due to repeated information
Solution Approach 1:
The patent segments the PCI list information by introducing slice group identifiers that group cells with identical PCI lists together. Instead of transmitting separate complete PCI lists for each slice group, the system transmits one PCI list per slice group and uses identifiers to reference them, reducing redundant information transmission while maintaining accurate cell identification for each slice.
2Reliability
If the network transmits complete PCI lists for each slice group, then the UE can perform accurate slice-based cell reselection, but the inter-device connection setup becomes inefficient due to large message sizes
Solution Approach 1:
The patent uses indexing to create references to PCI lists rather than transmitting the actual list data multiple times. Each slice group is assigned an index that points to its corresponding PCI list, allowing the UE to efficiently identify the correct list without receiving redundant data, thus improving connection setup efficiency while maintaining reselection accuracy.
3Reliability
If the network provides detailed slice information for each cell, then the UE can make precise reselection decisions, but the synchronization between network and UE becomes more complex
Solution Approach 1:
The patent simplifies synchronization by segmenting information into two parts: slice group identifiers that define groupings of cells with identical PCI lists, and the actual PCI list data referenced by these identifiers. This segmentation allows the network and UE to maintain synchronized state with reduced complexity, as the UE only needs to store and reference compact identifiers rather than maintaining multiple complete PCI lists.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure relates to a method and apparatus for cell reselection with slices in wireless network. Embodiment herein is to provide a method for reselecting a cell with slices in a wireless network. The method comprises receiving a first slice information list in a frequency from a network apparatus (201) in the wireless network. The first slice information list includes information to identify a list of cells of a first slice group. A UE (102) receives a second slice information list that includes the information to identify the list of cells of a second slice group. Further, identifying one of allowed cell list and excluded cell list of the first slice group and second slice group based on the first slice information list and the second slice information list. Also, performing a slice-based cell reselection based on determining a slice-based cell reselection priority using identified one of the allowed cell list and the excluded cell list of the first slice group and the second slice group.