Multicast DCI FDRA Bit Mapping Across Different NR BWPs
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Solution Overview
Problem
In the New Radio (NR) system, the resource assignment for multicast PDSCH is not adequately addressed, leading to inconsistencies in determining the frequency domain resource assignment due to varying BWP configurations among UEs, which affects the efficiency and consistency of multicast services.
Innovation Solution
A method and apparatus for determining the quantity of frequency domain resource assignment bits in multicast DCI based on predefined information or a first quantity of resource blocks, allowing for precise assignment of multicast PDSCH resources by utilizing predefined RB configurations and bit mappings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different BWP configurations are used for different UEs, then adaptability to various UE requirements is improved, but consistency of resource assignment interpretation deteriorates
Solution Approach 1:
The patent applies local quality by allowing different BWP configurations (with different FDRA bit quantities) for different UEs or UE groups, while ensuring that within each specific BWP configuration, the resource assignment interpretation is consistent and unambiguous. Each UE receives DCI formatted according to its specific BWP configuration, eliminating interpretation conflicts.
Solution Approach 2:
The patent segments the resource assignment space by dividing UEs into different groups or configurations based on their BWP settings. Each segment (UE group) has its own FDRA bit interpretation rules, allowing adaptability to different requirements while maintaining consistency within each segment through dedicated DCI formats.
2Measurement precision
If FDRA bit quantity is varied according to BWP configuration, then resource assignment precision for individual UEs is improved, but system complexity in managing multiple configurations deteriorates
Solution Approach 1:
The patent implements dynamic adaptation where the FDRA bit quantity in DCI dynamically matches the UE's active BWP configuration. The system automatically adjusts the DCI format based on which BWP the UE is currently using, providing precise resource assignment for each UE's specific configuration without requiring manual intervention or complex centralized management.
Solution Approach 2:
Each UE autonomously determines how to interpret the FDRA bits in received DCI based on its own BWP configuration. The UE uses its pre-configured BWP parameters (such as bandwidth and resource block indexing) to correctly decode the resource assignment, eliminating the need for the network to explicitly manage or coordinate the interpretations across all UEs.
3Adaptability or versatility
If UE-specific BWP configurations are implemented, then customization for different service requirements is improved, but interoperability and standardized processing deteriorates
Solution Approach 1:
The patent creates a universal DCI interpretation framework where a single DCI format can serve multiple UE types with different BWP configurations. The universality is achieved by making the FDRA bit interpretation dependent on the UE's active BWP state rather than requiring separate DCI formats for each configuration type, simplifying the overall system operation.
Data Source
AI summary
A resource assignment method, a terminal, and a network side device are provided. The method in this application includes: determining a quantity of Frequency Domain Resource Assignment (FDRA) bits in multicast Downlink Control Information (DCI) based on predefined information or a first quantity of Resource Blocks (RBs); and determining, based on information corresponding to FDRA of the quantity of bits, FDRA of a multicast Physical Downlink Shared Channel (PDSCH) scheduled by the multicast DCI.