PDCCH Blind Decoding Management via Search Space Priorities
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Solution Overview
Problem
The processing load for blind searches in wireless communication networks, particularly in NR systems, exhibits time-variant peaks due to the monitoring of multiple sets of search spaces, leading to inefficiencies and potential PDCCH blocking.
Innovation Solution
The solution involves managing PDCCH blind decodings by identifying occasions where the allowed number of blind decodings is exceeded, and then reducing the set of blind decodings or candidates based on predefined search space priorities and rules, thereby optimizing the processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sets of search spaces are monitored to maintain scheduling capability, then scheduling capability is improved, but processing load exhibits time-variant peaks
Solution Approach 1:
The patent segments the search spaces into different types (common search space and user-specific search space) and applies different priority rules to each segment. This segmentation allows the system to maintain comprehensive scheduling capability across all search space types while managing processing load through differentiated priority handling during blind decoding reduction.
2Productivity
If the number of blind decodings is reduced to manage processing load, then processing load is improved, but the number of blind decodings is reduced
Solution Approach 1:
The patent dynamically changes the parameter of blind decoding quantity based on processing load conditions. When processing load peaks are detected, the system adjusts the number of blind decodings by applying priority-based reduction rules that modify the original configuration parameters, allowing flexible adaptation between maintaining comprehensive decoding and reducing processing load.
3Productivity
If blind decodings are reduced based on search space priorities, then processing load peaks are reduced, but PDCCH blocking may occur
Solution Approach 1:
The patent implements a feedback mechanism where the system monitors processing load conditions and adjusts blind decoding quantities accordingly. By continuously assessing whether processing load peaks are present and applying priority-based reduction only when necessary, the system provides feedback-driven control that reduces processing load peaks while minimizing PDCCH blocking through intelligent, condition-based decision making.
Data Source
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AI summary
Systems, methods, apparatuses, and computer program products for managing or monitoring of the control channel in new radio (NR) through blind searches are provided. One method may include configuring, by a network node, multiple search spaces, sets of search spaces, and/or control resource sets, to a user equipment, that results in monitoring occasions where more blind decodings are required than allowed by capability of the user equipment. The method may further include identifying the monitoring occasions for which an allowed number of blind decodings is exceeded, determining a reduced set of blind decodings and/or candidates determined by predefined search space priorities or rules, and transmitting physical downlink control channel(s) to the user equipment given the reduced set.