Terminal CoMP Quality Calculation for Handover Control
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Solution Overview
Problem
Current handover control methods fail to effectively manage handovers in communication systems where a cell group performs downlink communication in a coordinated manner, as they do not account for the quality improvements provided by CoMP, leading to suboptimal handover decisions and increased system overhead.
Innovation Solution
A terminal that receives reference signals from a quality calculation target group of cells, calculates a comprehensive quality value, and transmits this information to the serving cell when the value exceeds a threshold, allowing for appropriate handover control even in CoMP scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handover control methods are used in CoMP systems, then handover decisions are made based on individual cell quality, but the quality improvement provided by CoMP is not accounted for, leading to suboptimal handover decisions
Solution Approach 1:
The patent merges the quality measurements of multiple cells in a CoMP group into a single comprehensive quality value. The terminal calculates the comprehensive quality based on reference signals from all cells in the CoMP group, allowing the handover decision to reflect the collective performance of the coordinated cell group rather than individual cell performance.
2Loss of information
If the terminal reports quality information for each cell individually, then the base station can make handover decisions, but unnecessary quality reports increase system overhead
Solution Approach 1:
The patent combines multiple individual quality reports into a single comprehensive quality report for the CoMP group. Instead of reporting quality for each cell separately, the terminal calculates and reports one comprehensive quality value that represents the overall performance of the coordinated cell group, thereby reducing the number of reports and system overhead while preserving the necessary information for handover decisions.
3Adaptability or versatility
If the terminal measures and reports quality for multiple cells, then handover options are increased, but the processing burden and measurement complexity increase
Solution Approach 1:
The patent simplifies the measurement processing by merging the quality assessment of multiple cells into a single comprehensive calculation. The terminal measures reference signals from all cells in the CoMP group and computes one integrated quality metric, which maintains the flexibility to evaluate multiple handover options while reducing the computational burden compared to processing each cell's quality separately.
Data Source
AI summary
Provided is a terminal that achieves appropriate handover control even in a case where a cell group in which downstream communication is performed by coordination between a plurality of cells is included in a communication system. According to the terminal (100), a CoMP quality calculation unit (105) calculates a comprehensive quality value for a group to be quality calculated on the basis of a reference signal transmitted from the group to be quality calculated, and, when the comprehensive quality value calculated exceeds a CoMP threshold, a measurement control unit (106) transmits to the communicating cell the quality of the reference signal transmitted from at least one cell of the plurality of cells included in the group to be quality calculated.