PDCCH Blind Decoding Across Overlapping CORESETs
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Solution Overview
Problem
The power consumption of terminals in wireless communication systems is high due to the need for blind-decoding of multiple overlapping CORESETs in the 5G communication system, which complicates the decoding of downlink control channels.
Innovation Solution
A method and apparatus that reduces power consumption by sequentially blind-decoding PDCCH resource candidates, skipping decoding of overlapping regions, and re-determining candidates based on configuration information and terminal identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CORESETs are configured to support various services with different transmission parameters, then service flexibility and connection density are improved, but terminal power consumption increases due to blind-decoding of overlapping resources
Solution Approach 1:
The patent segments the blind-decoding process into two distinct phases: first decoding the first downlink control channel, then decoding the second downlink control channel only in non-overlapping resource regions. This segmentation allows the terminal to handle multiple CORESETs configured for different services while avoiding redundant decoding in overlapping regions, thus reducing power consumption while maintaining service flexibility
Solution Approach 2:
The patent extracts and excludes overlapping resource regions from the decoding process. After decoding the first downlink control channel, the terminal identifies resource regions where the first and second CORESETs overlap, and excludes these regions from blind-decoding the second downlink control channel. This extraction of harmful redundant operations reduces power consumption while preserving the ability to support multiple services
2Reliability
If blind-decoding is performed on all PDCCH resource candidates in overlapping CORESETs, then decoding reliability is improved, but power consumption and processing complexity increase
Solution Approach 1:
The patent performs preliminary decoding of the first downlink control channel before attempting to decode the second downlink control channel. By first identifying and decoding PDCCH candidates in the first CORESET, the terminal can then use this information to determine which resource regions to exclude when decoding the second CORESET, reducing processing complexity while maintaining decoding reliability
Solution Approach 2:
The patent applies partial action by decoding only the necessary PDCCH candidates rather than all possible candidates in overlapping CORESETs. After decoding the first downlink control channel, the terminal performs blind-decoding on the second downlink control channel only in non-overlapping resource regions, performing just enough decoding to maintain reliability without excessive processing
Data Source
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AI summary
Disclosed in one embodiment is a downlink control channel decoding method of a wireless communication system, comprising the steps of: receiving setting information on a first resource and a second resource; blind-decoding reception signals on PDCCH resource candidates within the first resource determined by the setting information, so as to search for a PDCCH of the first resource; and blind-decoding reception signals on PDCCH resource candidates within the second resource determined by the setting information, and by blind-decoding, among the resource candidates, the remaining one or more resource candidates excluding one or more resource candidates, which include a resource area overlapping with the PDCCH having been searched for, so as to search for a PDCCH of the second resource. Therefore, since the number of PDCCH resource candidates required for blind-decoding is adjusted on the basis of an overlapping resource area, power consumption of a terminal can be reduced.