Early Termination for Blind Decoding Downlink Control Channels
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Solution Overview
Problem
Current wireless systems, particularly in 5G networks, face challenges in efficiently decoding downlink control information due to high computational resource utilization and time consumption during the blind decoding process, which affects performance and throughput.
Innovation Solution
An early termination mechanism for blind decoding is introduced, where a priority list is used to preferentially decode physical resource elements, and a termination bit is employed to halt decoding once downlink control information is identified, reducing unnecessary decoding of candidates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind decoding is performed on all physical resource elements in the search space, then downlink control information is reliably identified, but computational resources and time consumption increase significantly
Solution Approach 1:
The patent applies preliminary action by prioritizing and decoding certain physical resource elements before others based on predefined priority lists. The UE prepares and uses these priority lists to determine which resource elements to decode first, allowing early termination when DCI is found, thus improving throughput while maintaining reliability.
2Loss of information
If all resource elements are decoded to ensure complete downlink control information retrieval, then information completeness is achieved, but processing time increases
Solution Approach 1:
The patent extracts the essential downlink control information by decoding only the necessary physical resource elements in priority order. Once DCI is identified through the priority-based decoding process, further decoding of remaining resource elements is terminated, thus preventing time loss while ensuring information completeness.
3Measurement precision
If computational resources are allocated to decode all candidates, then decoding accuracy is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies partial action by decoding only a subset of physical resource elements based on priority lists rather than all candidates. The UE performs partial decoding until DCI is successfully identified, reducing computational resource utilization while maintaining decoding accuracy through the prioritization strategy.
Data Source
AI summary
An early termination system for blind decoding is provided to decrease the computational resources utilized when decoding the physical resources, and decrease the time spent decoding. A blind decoding priority list can be used by the mobile device to preferentially decode specific physical resource elements as it specifies the order of all the candidate physical downlink control channels (PDCCHs). When the physical resource elements are decoded, if there is no more downlink control information in that transmission time interval, the downlink control information can include a termination bit, and the mobile device, upon identifying the termination bit can cease blind decoding of the remainder candidates. In this way, the blind decoding process more quickly identifies the downlink control information, and subsequent blind decoding is halted.