Control Channel Element Resource Allocation for Frequency Diversity
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Solution Overview
Problem
In wireless communications, the poor channel frequency diversity between adjacent resource blocks (RBs) leads to high bit or block error rates for control information, degrading the performance of communication systems, as eREGs forming the same eCCE from adjacent RBs result in inadequate frequency diversity.
Innovation Solution
Interleaving or grouping resource blocks to configure eREGs forming the same eCCE to non-adjacent RBs, thereby enhancing channel frequency diversity and reducing information loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If eREGs forming the same eCCE are taken from adjacent RBs, then the resource allocation is simple and contiguous, but the channel frequency diversity is poor leading to high bit error rate
Solution Approach 1:
The eCCE is segmented into multiple eREGs that are distributed across non-adjacent RBs rather than being concentrated in adjacent RBs. This segmentation approach allows the control information to be spread across different frequency resources, improving channel frequency diversity while maintaining manageable configuration complexity through systematic mapping rules
Solution Approach 2:
The patent transitions from a one-dimensional contiguous RB allocation to a multi-dimensional distributed allocation pattern. By mapping eREGs to non-adjacent RBs across different resource dimensions, the system achieves better frequency diversity without proportionally increasing configuration complexity, as the distribution follows defined mapping patterns
2Reliability
If eREGs forming the same eCCE are from adjacent RBs, then the mapping process is straightforward, but information loss probability increases due to poor frequency diversity
Solution Approach 1:
By segmenting the eCCE into multiple eREGs distributed across non-adjacent RBs, the patent ensures that control information is not concentrated in a single contiguous frequency band. This segmentation reduces the probability that all eREGs will experience deep fading simultaneously, thereby lowering information loss probability and improving transmission reliability
Solution Approach 2:
The patent changes the spatial-frequency parameter arrangement by mapping eREGs to non-adjacent RBs instead of adjacent ones. This parameter change in resource allocation pattern transforms the frequency diversity characteristics, reducing information loss probability while maintaining systematic mapping for manageable complexity
Data Source
Figure 1a~1b
Figure 2a
Figure 2b~2c
AI summary
Embodiments of the present invention disclose a method, an apparatus, and a system for transmitting control information. The method includes: determining enhanced resource element group numbers in resource blocks, and determining, according to the resource element group numbers, positions of resource elements corresponding to enhanced resource element groups; interleaving the enhanced resource element group numbers, and determining an enhanced control channel element; determining, according to the enhanced control channel element and the positions of the resource elements corresponding to the enhanced resource element groups, positions of resource elements corresponding to the enhanced control channel element; and transmitting corresponding control information on the positions of the resource elements corresponding to the control channel element. The present invention alleviates a problem that channel frequency diversity is poor, and lowers the probability of loss of information of a terminal device.