EPDCCH Blind Decoding via Localized Distributed Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently receiving control information through blind decoding of the enhanced physical downlink control channel (EPDCCH) due to complexities in resource allocation and channel estimation.
Innovation Solution
The method involves configuring a search space for localized and distributed EPDCCH transmission within a PRB pair, using enhanced resource element groups and CCEs, and performing blind decoding based on the transmission type, with specific antenna port mapping and DMRS configuration to enhance decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blind decoding is performed for EPDCCH without distinguishing transmission types, then decoding coverage is maintained, but decoding overhead and complexity increase
Solution Approach 1:
The patent segments the EPDCCH search space into localized and distributed transmission types, allowing the UE to perform blind decoding separately for each type. This segmentation enables the system to process different transmission modes independently, reducing the overall decoding complexity while maintaining comprehensive coverage for both transmission types.
Solution Approach 2:
The patent introduces dynamic configuration of search spaces for localized and distributed EPDCCH transmissions through higher layer signaling. The UE can adaptively adjust its blind decoding strategy based on the configured search space parameters, enabling flexible optimization of decoding efficiency and complexity according to actual transmission conditions.
2Reliability
If search space is configured for both localized and distributed EPDCCH, then reception reliability is improved, but resource overhead increases
Solution Approach 1:
The patent applies local quality by configuring different search space properties for localized and distributed EPDCCH transmissions. Each transmission type has its own optimized search space parameters (such as aggregation levels, candidate numbers, and resource block assignments), allowing the system to maintain high reliability for both types while minimizing redundant resource allocation through type-specific optimization.
3Measurement precision
If antenna port mapping is optimized for specific transmission type, then decoding accuracy is improved, but system adaptability decreases
Solution Approach 1:
The patent implements a universal antenna port mapping mechanism that functions for both localized and distributed EPDCCH transmissions. The higher layer configuration provides a unified interface for setting antenna port parameters, while the underlying mapping rules are designed to accommodate both transmission types. This multi-functional approach enables optimized decoding accuracy for each type while maintaining system adaptability through a single configuration framework.
Data Source
Figure 1(a)~1(b)
Figure 2
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AI summary
One embodiment of the present invention provides a method for enabling a terminal to receive control information in a wireless communication system, comprising the steps of: determining resource units for Enhanced Physical Downlink Control Channel (EPDCCH) of a plurality of resource units, with respect to each of one or more resource sets; and blind-decoding the resource units for the EPDCCH with respect to each of the one or more resource sets, wherein each of the one or more resource sets is set for one of localized EPDCCH transmission or distributed EPCCH transmission.