CoMP Cell Set Management for Stable LTE Handovers
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Solution Overview
Problem
The coordinated multiple point transmission and reception (CoMP) technique in LTE systems faces challenges in maintaining communication quality and efficiency, particularly during handover processes, due to insufficient cell selection criteria and complex radio environments, leading to disrupted connections.
Innovation Solution
A mobile communication system that includes a detection target cell set and an adjustment unit to manage coordinated communication, allowing user equipment to detect and adjust communication with candidate cells, ensuring seamless and improved communication quality through coordinated cell management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coordinated multiple point transmission and reception (CoMP) technique is implemented in LTE systems, then communication quality and throughput are improved, but handover processes become more complex and connection stability deteriorates due to insufficient cell selection criteria
Solution Approach 1:
The patent segments the cell management process into distinct phases: detection target cell set configuration, candidate cell set identification, and coordinated cell set management. This segmentation allows each phase to be optimized independently, improving handover reliability while maintaining CoMP benefits. The serving cell separately manages detection targets, candidates, and coordinated cells, preventing confusion during handover transitions.
Solution Approach 2:
The patent implements preliminary action by pre-configuring detection target cell sets and identifying candidate cells before actual handover occurs. The serving cell proactively manages the coordinated cell set and prepares candidate cell information in advance, allowing the mobile terminal to perform measurements and evaluations beforehand. This preliminary preparation ensures smooth handover transitions and maintains connection stability.
2Measurement precision
If multiple cell sets (detection target, candidate, coordinated) are managed simultaneously, then cell selection precision is improved, but system complexity increases due to additional management overhead
Solution Approach 1:
The patent divides the cell management function into three distinct sets: detection target cell set, candidate cell set, and coordinated cell set. Each set serves a specific purpose in the cell selection process. This segmentation improves measurement precision by allowing dedicated optimization for each stage while managing complexity through clear functional separation. The serving cell maintains these sets independently with specific management procedures for each.
Solution Approach 2:
The patent introduces the concept of candidate cell set as an intermediary between detection target cells and coordinated cells. This intermediate layer acts as a buffer that filters and evaluates potential cells before they become coordinated cells. The mobile terminal performs measurements on candidate cells and reports back, allowing the serving cell to make informed decisions. This intermediary structure refines cell selection precision while distributing management complexity across multiple stages.
Data Source
AI summary
In a mobile communication system, an RRM measurement set is set as a collection of cells to become targets on which a UE performs a process of detecting whether or not radio communication is allowed. Among the cells in the RRM measurement set, a CoMP measurement set is set as a collection of cells to become candidates on which the UE performs a process of detecting whether or not coordinated communication (CoMP communication) is allowed. Among the cells of the CoMP measurement set, a CoMP active set is set as a collection of cells to become targets on which the UE performs the process of detecting whether or not CoMP communication is allowed.