LTE Downlink Rate-Matching via Master Service Point Coordination
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Solution Overview
Problem
Current downlink data rate-matching methods in LTE systems suffer from low accuracy, particularly in scenarios involving heterogeneous networks and coordinated multi-point (CoMP) transmission, leading to resource waste and interference issues.
Innovation Solution
A method and device for determining rate-matching resource information based on the downlink control information (DCI) format, using predefined corresponding relationships to accurately perform rate-matching for downlink data, thereby enhancing the accuracy of data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rate-matching is performed according to the configuration of CRS, PDSCH start symbol or zero power CSI-RS of each cell, then resource merging of different points can be done independently, but data merge errors will occur due to different Muting resource locations
Solution Approach 1:
The patent introduces a master service point as an intermediary to coordinate rate-matching across multiple service points. The master service point's configuration (CRS, PDSCH start symbol, zero power CSI-RS) serves as the reference for all points performing joint transmission, ensuring unified resource merging and eliminating data merge errors while maintaining independent configuration capability at each point
2Loss of energy
If merging is performed according to the master service point, then resource waste and interference of CRS of other points on data are avoided, but additional signaling overhead is required
Solution Approach 1:
The master service point configuration serves multiple functions simultaneously: it provides the reference for rate-matching, coordinates resource merging across all points, and eliminates the need for separate signaling for each service point's configuration. This multi-functionality reduces overall signaling overhead while preventing resource waste and CRS interference
3Measurement precision
If considering measuring the interference using zero power CSI-RS, then interference measurement capability is improved, but more zero power CSI-RS configurations are required
Solution Approach 1:
The patent merges the interference measurement function with the existing master service point's zero power CSI-RS configuration. Instead of requiring separate zero power CSI-RS configurations for each service point, the master service point's configuration is reused for interference measurement, reducing configuration complexity while maintaining measurement precision
Data Source
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AI summary
Provided are a downlink data rate-matching method and device, the method including: a UE acquiring one of the following information: one or more sets of rate-matching resource indication information configured by a base station and used for instructing the UE to perform rate-matching, one or more sets of rate-matching resource indication information and combined rate-matching resource indication information, and rate-matching resource indication information of a serving cell of the UE acquired when the UE accesses a network; the UE determining a DCI Format corresponding to downlink grant indication information in a subframe of downlink control information transmitted by the base station; and the UE determining rate-matching resource information corresponding to the DCI Format and used for rate-matching according to the DCI Format and a preset corresponding relationship, and conducting downlink data rate-matching according to the rate-matching resource information. The solution improves rate-matching accuracy.