Terminal Device Downlink Control Channel Priority Monitoring
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Solution Overview
Problem
Terminal devices face limitations in decoding downlink control channels due to limited decoding capacity within a time period, leading to suboptimal communication with network devices.
Innovation Solution
Implementing a method where terminal devices prioritize downlink control channel monitoring based on control resource set priority, search space priority, downlink control information priority, or downlink control information size priority to efficiently detect and decode essential control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device monitors all downlink control channels without priority-based selection, then the decoding completeness is improved, but the decoding capacity limitation causes missed detections and reduced communication reliability
Solution Approach 1:
The patent segments the downlink control channel monitoring task by dividing search spaces into different priority levels (first priority and second priority). The terminal device performs blind detection on high-priority search spaces first, then on low-priority search spaces, based on available decoding capacity. This segmentation allows the system to handle the limited decoding capacity by prioritizing critical control information while still attempting to decode less critical information when resources permit.
Solution Approach 2:
The patent changes the parameter of search space priority classification to resolve the contradiction. By assigning different priority levels to different search spaces and configuring the terminal device to monitor them in priority order, the system optimizes the use of limited decoding capacity to ensure reliable reception of high-priority control information while managing the overall decoding load.
2Measurement precision
If the terminal device performs blind detection on multiple DCI formats and sizes, then the detection accuracy is improved, but the number of decoding attempts increases beyond the device capability
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure search spaces with different priority levels and DCI format information before the terminal device performs blind detection. The terminal device uses this pre-configured information to guide its decoding attempts, starting with high-priority search spaces and specific DCI formats, thereby improving detection accuracy for critical information while limiting the total number of decoding attempts to within device capabilities.
3Adaptability or versatility
If the network device configures multiple search spaces with different aggregation levels, then the control information coverage is improved, but the terminal device's monitoring complexity increases
Solution Approach 1:
The patent segments the search space configuration into multiple priority levels with different aggregation levels. High-priority search spaces may use higher aggregation levels for robustness, while low-priority search spaces use lower aggregation levels. The terminal device monitors these segmented search spaces in priority order, which maintains comprehensive control information coverage while reducing monitoring complexity by focusing resources on high-priority configurations first.
Data Source
AI summary
A method and an apparatus for monitoring a downlink control channel, a terminal device, and a computer readable storage medium. The monitoring method includes determining, by a terminal device, priority information, where the priority information includes at least one of a control resource set priority, a search space priority, a downlink control information priority, or a downlink control information size priority, monitoring, by the terminal device, a downlink control channel based on the priority information, and obtaining, by the terminal device, downlink control information from the downlink control channel.