Network Sharing Information Broadcast for Cell Reselection
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Solution Overview
Problem
In network sharing systems, User Equipments (UEs) face challenges in selecting the best CN operator during inter-cell roaming due to the lack of comprehensive network sharing information about neighbor cells, leading to suboptimal cell reselection and potential service quality degradation.
Innovation Solution
A method and apparatus for transmitting and receiving network sharing information in an NS system, where system information including CN operator IDs and sharing information for neighbor cells is broadcast to UEs, enabling them to perform accurate cell and CN operator reselection based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If network sharing information about neighbor cells is not broadcast to UEs, then system information complexity is reduced, but UEs cannot accurately select CN operators during inter-cell roaming
Solution Approach 1:
The patent applies local quality by differentiating the treatment of neighbor cell information based on network sharing status. Cells are categorized into shared cells (requiring network sharing information broadcast) and non-shared cells (using conventional system information). This selective approach ensures that UEs receive comprehensive network sharing information only where necessary, improving CN operator selection accuracy for shared cells while avoiding unnecessary information overhead for non-shared cells.
2Productivity
If comprehensive network sharing information is broadcast to all UEs, then inter-cell roaming efficiency is improved, but system information overhead and processing complexity increase
Solution Approach 1:
The patent segments neighbor cells into shared cells and non-shared cells based on network sharing status. For shared cells, the system broadcasts comprehensive network sharing information including multiple CN operator identifiers. For non-shared cells, conventional system information is used. This segmentation enables UEs to efficiently perform cell reselection and CN operator selection only where network sharing applies, improving inter-cell roaming efficiency while reducing unnecessary information processing complexity.
3Reliability
If network sharing information is provided for all neighbor cells, then UE can always select best CN operator, but information transmission overhead increases unnecessarily
Solution Approach 1:
The patent applies local quality by providing network sharing information selectively only for shared neighbor cells rather than all neighbor cells. The system determines whether each neighbor cell is a shared cell based on network sharing status, and only broadcasts network sharing information for those cells. This approach ensures reliable service quality during roaming for shared cells while minimizing information transmission overhead and energy consumption for non-shared cells.
Data Source
AI summary
A method and apparatus is provided for signaling network sharing information about neighbor cells in an NS system where a RAN is shared among a plurality of CN operators. In the signaling method, it is determined whether each of neighbor cells of a current cell in which a UE is located, is shared by a CN operator other than a CN operator controlling the neighbor cell. System information without network sharing information is generated if at least one of the neighbor cells is shared by a CN operator other than a CN operator controlling the neighbor cell. System information including the network sharing information is generated if none of the neighbor cells are shared by any CN operator other than CN operators controlling the neighbor cells. The system information is then broadcast to the UE from the current cell.