CCE to REG Mapping in 5G NR Control Resource Sets
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Solution Overview
Problem
In wireless communications systems, particularly in the next-generation new radio (NR) system, the accurate and efficient mapping of control channel elements (CCEs) to resource element groups (REGs) within a control resource set (COREST) is challenging due to the consecutive or discrete frequency domain resources, leading to potential failures in receiving and sending control information.
Innovation Solution
A method where a terminal device determines M resource element group bundles in a control resource set by using offset and shift values based on specific interleaving parameters, ensuring accurate and efficient resource configuration, thereby preventing repeated mapping of CCEs to REGs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CCEs are mapped to REGs in a control resource set with consecutive or discrete frequency domain resources, then resource utilization is improved, but different CCEs may be mapped to the same resource causing control information transmission failures
Solution Approach 1:
The patent introduces an interleaving parameter R to control the mapping pattern between CCEs and REGs. By adjusting this parameter, the system can change how CCEs are distributed across frequency resources, ensuring that different CCEs map to different REGs while maintaining high resource utilization. The parameter R acts as a configurable variable that resolves the conflict between efficient resource usage and reliable transmission.
Solution Approach 2:
The patent introduces an interleaving function as an intermediary mechanism between CCEs and REGs. This function acts as a mediator that transforms the direct mapping relationship into an indirect one through interleaving operations, preventing direct conflicts where different CCEs would map to the same REG while still utilizing frequency domain resources efficiently.
2Productivity
If blind detection of control channels is performed to improve terminal device detection efficiency, then detection speed is improved, but the complexity of resource configuration increases
Solution Approach 1:
The patent uses the interleaving parameter R as a configurable variable that can be adjusted to optimize the balance between detection efficiency and configuration complexity. By changing this parameter, the system can adapt the mapping pattern to match the blind detection capabilities of terminal devices, improving detection efficiency while keeping configuration manageable through parameterization.
Data Source
AI summary
This application relates to the field of wireless communications, and in particular, to a communication method, an apparatus, and a system in a wireless communications system. In the method, a network device and a terminal device determine M resource element group bundles in a control resource set. The network device sends a control channel on resources corresponding to the M resource element group bundles. The terminal device detects the control channel on the resources corresponding to the M resource element group bundles, where M is greater than or equal to 1. The control resource set includes B resource element group resource element group bundles. By using the method, resource configuration efficiency in a communications system is improved.