EPDCCH Decoding via Antenna Port QCL Parameter Sets
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Solution Overview
Problem
In advanced wireless communication systems, accurately determining the relationship between antenna ports is crucial for efficient downlink signal reception, particularly in quasi co-location (QCL) scenarios, as existing methods lack precision in handling antenna port relationships, affecting signal decoding and transmission efficiency.
Innovation Solution
A method for decoding the enhanced physical downlink control channel (EPDCCH) in user equipment (UE) that considers antenna port quasi co-location (QCL) relationships, utilizing parameter sets indicated by higher layers, including PQI parameters, to determine RE mapping for EPDCCH, EPDCCH start symbols, and PDSCH signal reception based on downlink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If antenna port relationships are not accurately determined, then downlink signal reception efficiency deteriorates, but determining QCL relationships increases system complexity
Solution Approach 1:
The patent applies preliminary action by pre-configuring QCL parameter sets through higher layer signaling before EPDCCH reception. The network side provides QCL configuration information including parameter sets (PQI) that define antenna port relationships in advance, allowing the terminal to efficiently determine QCL relationships without real-time computation, thus improving reception efficiency while managing system complexity
Solution Approach 2:
The patent uses QCL parameter sets as intermediaries to convey antenna port relationship information. Instead of directly determining complex antenna port relationships, the system introduces parameter sets (PQI) that serve as intermediaries, encapsulating QCL configuration information and simplifying the determination process for terminals
2Measurement precision
If QCL parameter sets are used to determine antenna port relationships, then signal decoding accuracy improves, but information processing requirements increase
Solution Approach 1:
The patent segments QCL configuration information into multiple parameter sets (PQI 0, PQI 1, etc.), where each parameter set contains specific QCL information for different antenna ports or signal types. This segmentation allows the terminal to process only relevant parameter sets needed for specific decoding tasks, reducing overall information processing requirements while maintaining decoding accuracy
Solution Approach 2:
The patent applies local quality by providing different QCL parameter sets for different antenna ports, signal types, or resource locations. Instead of using a single uniform QCL configuration, the system tailors QCL parameters locally to specific needs, improving signal decoding accuracy for each case while avoiding unnecessary processing of irrelevant parameters
Data Source
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AI summary
The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment decoding an enhanced physical downlink control channel (EPDCCH) in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from a downlink subframe a reference element (RE) on which the EPDCCH is mapped; and decoding the EPDCCH based on the RE on which the EPDCCH is mapped. At least one EPDCCH-physical resource block (PRB)-set for monitoring the EPDCCH can be established for the user equipment, wherein a parameter set for each of the at least one EPDCCH-PRB-set is indicated by an upper layer, and the RE on which the EPDCCH is mapped can be determined based on the parameter set indicated by the upper layer.