Carrier Aggregation Measurement Reporting for Accurate Channel Quality
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Solution Overview
Problem
In LTE-A systems, the network cannot correctly evaluate the channel quality of carrier-aggregation cells because it can only acquire measurement results from a single component carrier, leading to suboptimal service quality during handovers between carrier-aggregation cells.
Innovation Solution
A method where the base station configures measurement objects for user equipment (UE) to include one or more component carriers or component carrier sets of serving and neighboring cells, enabling the UE to perform measurements and report results for multiple component carriers within a carrier-aggregation cell, allowing the network to comprehensively evaluate channel quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network only acquires measurement results from a single component carrier, then the measurement process is simple, but the channel quality evaluation of carrier-aggregation cells is inaccurate
Solution Approach 1:
The measurement object is segmented from a single component carrier to multiple component carriers within a carrier-aggregation cell. The UE performs measurements on each component carrier separately and reports results for multiple component carriers, enabling comprehensive channel quality evaluation while maintaining manageable measurement complexity through structured reporting.
Solution Approach 2:
The measurement approach transitions from a single-dimension (one component carrier) to multi-dimension (multiple component carriers) evaluation. By measuring and reporting channel quality across multiple component carriers simultaneously, the system achieves accurate carrier-aggregation cell quality assessment without proportionally increasing complexity.
2Measurement precision
If the UE reports measurement results for multiple component carriers, then the network can accurately evaluate channel quality, but the measurement reporting overhead increases
Solution Approach 1:
The patent extracts and reports only the essential measurement results from multiple component carriers that are necessary for accurate channel quality evaluation. By selectively reporting measurement data for multiple component carriers rather than all possible parameters, the system achieves accurate evaluation while controlling reporting overhead.
3Reliability
If the network evaluates channel quality based on single component carrier measurements, then the handover decision process is fast, but the service quality during handovers is suboptimal
Solution Approach 1:
The UE performs measurements and prepares measurement reports for multiple component carriers in advance before handover decisions are required. By having measurement results ready for multiple component carriers, the network can make informed handover decisions quickly while ensuring service quality, eliminating the need for time-consuming single-carrier measurements during critical handover moments.
Data Source
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AI summary
A method for reporting measurement result of carrier aggregation and an user equipment. The method for reporting measurement result of carrier aggregation includes: user equipment reports a measurement report which carries part of or all of the component carrier measurement results in the same carrier aggregation cell. With the invention, the problem that a web side can not correctly evaluate the channel quality of a carrier aggregation cell because the web side can only acquire the measurement result of a single component carrier is resolved. The invention further may assure the quality of service when UE switches between carrier aggregation cells, and satisfy a good mobility of UE between carrier aggregation cells.