Cell Splitting Pattern Notification for MRO Optimization
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing cell splitting and mobility robustness optimization (MRO) parameters, especially with the dynamic changes in cell configurations caused by active antenna systems (AAS), leading to potential handover failures and inefficient frequency use.
Innovation Solution
A method and apparatus for a base station to transmit cell splitting patterns to neighboring base stations via an X2 connection, using coverage and index information to update MRO parameters, ensuring accurate configuration and optimization even with dynamic cell changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cell splitting is performed dynamically using active antenna systems (AAS), then frequency efficiency and network capacity are improved, but handover failures increase due to outdated MRO parameters at neighboring base stations
Solution Approach 1:
The patent applies preliminary action by having the base station proactively notify neighboring base stations of cell splitting patterns before handover failures occur. The cell splitting pattern notification message is sent in advance, allowing neighboring base stations to update their MRO parameters proactively, thus preventing handover failures that would otherwise result from using outdated parameters.
Solution Approach 2:
The patent implements feedback by establishing a communication mechanism where the base station informs neighboring base stations about cell splitting patterns. This feedback loop ensures that neighboring base stations receive real-time information about network topology changes and can adjust their MRO parameters accordingly, maintaining handover reliability despite dynamic cell splitting.
2Reliability
If MRO parameters are updated frequently to match dynamic cell splitting patterns, then handover reliability is improved, but signaling overhead and network complexity increase
Solution Approach 1:
The patent applies parameter changes by introducing a cell splitting pattern notification mechanism that changes the state of MRO parameters in neighboring base stations. Instead of continuously updating all parameters, the system changes parameters selectively based on received cell splitting pattern information, reducing unnecessary signaling while maintaining handover reliability.
3Device complexity
If cell splitting patterns are not communicated to neighboring base stations, then network simplicity is maintained, but mobility robustness optimization fails due to outdated configuration information
Solution Approach 1:
The patent extracts only the essential cell splitting pattern information that neighboring base stations need to maintain accurate MRO parameters. By extracting and transmitting only this specific information through the cell splitting pattern notification message, the system maintains network simplicity while providing sufficient data for mobility robustness optimization.
Data Source
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AI summary
The present invention relates to a method and apparatus for indicating a cell splitting pattern to a neighboring base station. A base station may perform cell splitting, and transmit, to the neighboring base station, coverage information representing the current shape of the split cells of the base station, determined by the cell splitting. In addition, the base station may further transmit, to the neighboring base station, index information indicating the current cell splitting pattern preconfigured between the base station and the neighboring base station. The neighboring base station may apply a set of mobility robustness optimization (MRO) parameters on the basis of the received coverage information.