Frequency Domain Resource Allocation for FDM with Single DCI and Multiple TCI States
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating frequency domain resources across multiple transmission configuration indication states using a single downlink control information message, which affects the precision and efficiency of resource utilization in wireless networks.
Innovation Solution
The method involves receiving a downlink control information message that includes a frequency domain resource allocation field, identifying parameters such as precoding resource block group size or physical resource block bundle size, and assigning these resources to individual transmission configuration indication states based on these parameters, allowing for precise allocation of resource blocks across multiple states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single DCI message is used to allocate resources across multiple TCI states, then control overhead is reduced, but resource allocation precision deteriorates
Solution Approach 1:
The patent segments the frequency domain resources by introducing a precoding resource block group (PRBG) structure that divides the bandwidth into multiple PRBGs. Each PRBG can be independently associated with different TCI states, allowing precise resource allocation while maintaining a single DCI message format. The PRBG size is configurable to balance between allocation precision and control overhead.
Solution Approach 2:
The patent adds a new dimension to resource allocation by introducing the PRBG granularity layer between traditional resource blocks and TCI states. This dimensional addition allows the system to allocate resources with finer precision across multiple TCI states without increasing DCI message size, as the PRBG structure enables compact representation of resource-TCI mappings.
2Productivity
If resource blocks are allocated across multiple TCI states, then system capacity increases, but allocation complexity increases
Solution Approach 1:
The patent segments the allocation process into manageable units by defining PRBGs as intermediate structures between resource blocks and TCI states. This segmentation allows the system to handle multiple TCI states systematically, where each PRBG can be independently configured and mapped to appropriate TCI states, reducing the overall complexity of managing resources across multiple states.
Solution Approach 2:
The patent creates a universal PRBG structure that can serve multiple functions: it acts as a basic allocation unit, a grouping mechanism for TCI state mapping, and a configurable parameter for balancing precision and complexity. This multi-functional design allows the same structure to handle various allocation scenarios without requiring separate mechanisms for each case.
3Measurement precision
If contiguous resource blocks use the same precoding, then channel estimation accuracy improves, but resource allocation flexibility decreases
Solution Approach 1:
The patent introduces dynamic configurability of PRBG size, allowing the system to adapt the precoding granularity based on channel conditions and service requirements. When channel conditions are stable, larger PRBGs maintain the same precoding across more blocks for better estimation accuracy. When conditions vary rapidly, smaller PRBGs allow more frequent precoding changes, maintaining flexibility while preserving contiguous block properties within each PRBG.
Solution Approach 2:
The patent applies local quality by allowing different PRBGs to have different precoding configurations while maintaining the property that contiguous blocks within each PRBG use the same precoding. This enables fine-grained control where each PRBG can be optimized for local channel characteristics, achieving both accurate channel estimation within PRBGs and overall system flexibility through varied PRBG configurations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a downlink control information (DCI) message that includes a frequency domain resource allocation field to indicate allocated resource blocks (RBs) across multiple transmission configuration indication (TCI) states. The UE may identify, based at least in part on the DCI message and/or a radio resource control configuration, at least one parameter that indicates a unit of contiguous RBs over which the same precoding is used and/or a resource allocation type. The UE may assign the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the unit of contiguous RBs over which the same precoding is used and/or the resource allocation type. Numerous other aspects are provided.