Downlink Control Channel Timing for High Aggregation CORESETs
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Solution Overview
Problem
Conventional radio systems face challenges in ensuring the transmission of downlink control channels at high aggregation levels due to limited bandwidth and hardware constraints in low-function terminals, leading to deteriorated reception performance.
Innovation Solution
The method involves transmitting downlink control channels at multiple time domain positions of a CORESET and configuring search spaces to ensure transmission at a large aggregation level, utilizing CORESET and search space time domain pattern configuration information carried in high-layer signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the downlink control channel is transmitted at a high aggregation level to ensure transmission performance, then the reception performance is improved, but the physical resource in the CORESET becomes insufficient due to limited bandwidth
Solution Approach 1:
The patent extends the CORESET configuration from a single time domain position to multiple time domain positions. By configuring multiple CORESETs at different time positions (e.g., different slots or OFDM symbols) and allowing the downlink control channel to be transmitted across these multiple positions, the system effectively adds a time dimension to the resource allocation. This enables the aggregation level to be distributed across multiple time positions, thereby increasing the total physical resources available while maintaining the required aggregation level for reliable reception.
2Reliability
If the aggregation level is increased to ensure transmission performance, then the reception performance is improved, but the CORESET size constraint limits the achievable aggregation level
Solution Approach 1:
The patent segments the downlink control channel transmission across multiple CORESETs at different time domain positions. Instead of concentrating all resources in a single CORESET, the transmission is divided into multiple segments distributed across time. Each individual CORESET can maintain a manageable size, while the aggregated resources across multiple CORESETs provide the high aggregation level needed for improved reception performance. This segmentation approach resolves the conflict between CORESET size constraints and aggregation level requirements.
3Ease of manufacture
If low-function terminals with reduced hardware are deployed to reduce cost, then the hardware cost is reduced, but the channel processing capability and transmission performance are deteriorated
Solution Approach 1:
The patent merges multiple CORESET resources at different time domain positions to provide enhanced transmission resources for low-function terminals. By combining the physical resources from multiple CORESETs, the system effectively compensates for the reduced channel processing capability of low-function terminals. The merged resources across time positions provide the additional redundancy and aggregation level needed to maintain reliable reception despite the terminals' limited hardware capabilities.
Data Source
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Figure 3
Figure 4A
AI summary
The present disclosure provides a transmission method, a transmission device, a transmission device, and a computer-readable storage medium. The transmission method includes: receiving downlink control channel transmission time domain pattern configuration information from a network device; and determining a time domain resource range for transmission of a downlink control channel in accordance with the downlink control channel transmission time domain pattern configuration information.