Signaling Parameter Sets for Joint Transmission in Heterogeneous Networks
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Solution Overview
Problem
In coordinated multi-point transmission systems, the existing methods fail to accurately reflect channel conditions of different transmission points, leading to performance degradation due to the same Quasi-Co-Location (QCL) parameters and Physical Downlink Shared Channel Resource Element (PDSCH RE) mapping across varying time-frequency resources, especially in heterogeneous networks with partially overlapping system bandwidths.
Innovation Solution
The method involves determining and transmitting distinct parameter sets for multiple resource groups, including Physical Downlink Shared Channel Resource Element (PDSCH RE) mapping sets and Quasi-Co-Location (QCL) parameter sets, using indication signaling to differentiate between them, allowing for accurate channel measurement and improved joint transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same QCL parameters and PDSCH RE mapping are used across all resource groups, then the signaling complexity is reduced, but the channel measurement accuracy deteriorates
Solution Approach 1:
The patent segments the resource groups into multiple categories (first resource groups and second resource groups) with different QCL parameter configurations. Each segment is assigned specific QCL parameters appropriate to its characteristics, allowing differentiated channel measurement while maintaining manageable signaling through structured parameter sets.
Solution Approach 2:
Different QCL parameters are applied to different resource group segments based on their local characteristics. First resource groups use one set of QCL parameters while second resource groups use another set, enabling locally optimized channel measurement accuracy without requiring uniform complex signaling across all resources.
2Measurement precision
If distinct parameter sets are configured for each resource group, then the channel condition reflection accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent creates universal QCL parameter sets that can serve multiple resource groups. The first QCL parameter set and second QCL parameter set are designed to be reusable across different first resource groups and second resource groups respectively, reducing redundant signaling while maintaining accurate channel condition reflection for each group type.
Solution Approach 2:
The patent changes the QCL parameters based on resource group characteristics rather than configuring completely independent parameters for each group. By establishing parameter sets with different configurations (first set vs. second set) that can be applied to multiple groups, the system achieves accurate channel reflection with reduced signaling overhead through parameter reuse.
3Device complexity
If a single QCL parameter set is used for all transmission points, then the system complexity is reduced, but the joint transmission performance deteriorates
Solution Approach 1:
The patent segments transmission points into different categories (first transmission points and second transmission points) with distinct QCL parameter sets. This segmentation allows each transmission point type to use parameters optimized for its characteristics, improving joint transmission performance while keeping system complexity manageable through structured parameter classification.
Solution Approach 2:
Different QCL parameter sets are assigned to different transmission point segments based on their local transmission characteristics. First transmission points use the first QCL parameter set while second transmission points use the second QCL parameter set, enabling locally optimized transmission performance without requiring completely independent configuration for each point.
4Measurement precision
If resource groups are divided into multiple categories with different parameter sets, then the channel estimation accuracy is improved, but the resource allocation complexity increases
Solution Approach 1:
The patent uses parameter changes to differentiate resource groups, establishing clear distinctions between first and second resource groups through different QCL parameter sets. This approach improves channel estimation accuracy by matching parameters to resource characteristics while managing allocation complexity through systematic parameter classification rather than arbitrary configurations.
Data Source
AI summary
Provided is signaling transmitting and receiving methods, device, network-side device, terminal and storage medium. The signaling transmitting method includes: determining a first parameter set and/or a second parameter set for N resource groups; and transmitting an indication signaling, the indication signaling carries indication information for indicating the first parameter set and/or the second parameter set. The signaling receiving method includes: receiving an indication signaling transmitted by a network-side device. The indication signaling carries indication information for indicating a first parameter set and/or a second parameter set determined by the network-side device for N resource groups. The first parameter set is a Physical Downlink Shared Channel Resource Element (PDSCH RE) mapping set. The second parameter set is a Quasi-Co-Location (QCL) parameter set. N is a positive integer greater than 1.