TCI State Resource Allocation for Multi-TRP URLLC
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Solution Overview
Problem
Current multi-TRP/panel-based URLLC enhanced transmission solutions lack a clear resource allocation manner, which can influence channel estimation performance and reception detection, especially when FDM is used without considering bundling.
Innovation Solution
A resource allocation method that notifies terminals of TCI state resource allocation information through bitmaps, starting resource blocks, and quantities of occupied RBs, or predefined patterns, allowing for dynamic PRG size determination based on downlink control information and parameter sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If frequency selective precoding is applied to each PRB independently, then precoding gain is improved, but joint channel estimation cannot be performed
Solution Approach 1:
The patent segments the bandwidth into multiple PRB groups, where each group can apply independent frequency selective precoding. This segmentation allows precoding to be optimized per group while maintaining the ability to perform joint channel estimation across groups, resolving the contradiction between precoding gain and channel estimation accuracy.
Solution Approach 2:
The patent introduces a new dimension of organization by grouping PRBs into larger units. This dimensional change allows the system to operate at two levels: fine-grained precoding within each group and coarse-grained joint channel estimation across groups, thereby achieving both precoding gain and accurate channel estimation.
2Measurement precision
If PRB bundling is applied to enable joint channel estimation, then channel estimation performance is improved, but frequency selective precoding gain is reduced
Solution Approach 1:
The patent segments the bundled PRBs into smaller sub-groups or maintains granularity within bundles, allowing frequency selective precoding to operate effectively within each segment while still benefiting from joint channel estimation across the broader bundle structure.
Solution Approach 2:
The patent applies different processing characteristics to different parts of the bundled PRBs. Specifically, joint channel estimation is applied across the bundle for improved accuracy, while frequency selective precoding is maintained within segments to preserve local optimization and precoding gain.
3Adaptability or versatility
If FDM is used for multi-TRP transmission, then resource allocation flexibility is improved, but channel estimation performance deteriorates without bundling
Solution Approach 1:
The patent segments the frequency resources allocated via FDM into PRB groups that can be bundled for joint channel estimation. This segmentation allows the system to maintain FDM's resource allocation flexibility while applying bundling at the appropriate granularity to improve channel estimation performance.
4Area of stationary object
If dense deployment of access points is implemented, then network coverage is improved, but signaling overhead and handover delay increase
Solution Approach 1:
The patent merges multiple TRPs into coordinated transmission units that work together as a unified system. This merging allows the network to provide dense coverage through multiple access points while reducing handover delays by enabling seamless coordinated transmission and reception across TRP boundaries.
Data Source
AI summary
Disclosed in the present application are a resource allocation method and device. The resource allocation method provided in the present application includes: allocating a transmission configuration indication (TCI) state resource and determining TCI state resource allocation information; and notifying a terminal of the TCI state resource allocation information.