Control Resource Set Mapping for UE Detection Complexity
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Solution Overview
Problem
In conventional mobile communication systems, the detection complexity of control information increases with large system bandwidth, and the inflexibility in bandwidth configuration hampers small-bandwidth User Equipment (UE) access, especially in multi-beam designs where beam scanning reduces scheduling flexibility.
Innovation Solution
Mapping the control resource set to adjacent time-domain resources as Synchronization Signal (SS) blocks, allowing for reduced time-frequency resource usage during beam scanning and simplified detection complexity by transmitting control information on specific Resource Blocks (RBs) adjacent to SS blocks, thereby improving scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control channel occupies the entire system bandwidth, then the control information can be transmitted to all UEs, but the detection complexity of the UE increases dramatically when the system bandwidth is relatively large
Solution Approach 1:
The control resource set is divided into multiple control resource elements distributed across different resource blocks. Instead of occupying the entire system bandwidth, the control channel resources are segmented into specific resource blocks that can be selectively monitored by UEs, thereby reducing detection complexity while maintaining transmission coverage.
Solution Approach 2:
Different resource blocks are allocated for control resource sets based on local quality requirements. The network can configure specific resource blocks with appropriate control resource sets tailored to different UE groups or service requirements, allowing UEs to monitor only relevant local resources rather than the entire bandwidth.
2Reliability
If the UE is provided with a large bandwidth for the reception of the control information, then the control information can be transmitted reliably, but it is adverse to the flexible configuration of the bandwidth for the UE and the access of a small-bandwidth UE
Solution Approach 1:
The control resource set is segmented into multiple control resource elements distributed across different resource blocks. This segmentation allows the network to provide control information reception capabilities at multiple bandwidth levels, enabling small-bandwidth UEs to access control information using only the resource blocks within their supported bandwidth while larger bandwidth UEs can monitor additional resource blocks for enhanced reliability.
Solution Approach 2:
The control resource set structure is designed to be universal and adaptable to different UE bandwidth capabilities. The same control resource set configuration can serve both small-bandwidth and large-bandwidth UEs, with each UE type monitoring the appropriate subset of resource blocks according to its capabilities,从而实现 bandwidth-configurable control information reception.
3Reliability
If the public control resource set is placed in first several symbols within one slot and multiplexed with the SS blocks in a time-division manner, then the control information can be transmitted, but in a multi-beam system scenario, a beam scanning operation needs to be performed on each public control resource set which reduces scheduling flexibility
Solution Approach 1:
Instead of multiplexing control resource sets with SS blocks only in the time dimension (different symbols within one slot), the invention extends the multiplexing to the frequency dimension by distributing control resource elements across different resource blocks. This dimensional extension allows control information to be transmitted without requiring beam scanning operations on each control resource set, thereby maintaining scheduling flexibility in multi-beam systems.
Data Source
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AI summary
The present disclosure provides a control information transmission method, a control information detection method, a network device and a UE. The control information transmission method includes: mapping a control resource set for transmitting control information to at least one RB adjacent to an RB occupied by an SS block in accordance with a predetermined mapping mode; and transmitting the predetermined mapping mode to a UE, and transmitting the control information to the UE on the at least one RB occupied by the control resource set. According to the present disclosure, the control resource set and the SS block are multiplexed in a frequency-division manner, so as to improve the user scheduling flexibility and reduce the detection complexity of the control information at the UE.