User Terminal RBG Size Selection for Wireless Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In future radio communication systems, such as 5G and NR, the expansion of system bandwidth and the need for flexible resource allocation between UEs and channels lead to inefficiencies in resource allocation, particularly when using DFT-spread-OFDM and CP-OFDM waveforms, as existing methods struggle to efficiently manage resource blocks and control channels across different bandwidths.
Innovation Solution
The solution involves defining multiple RBG size candidates and selecting specific RBG sizes based on predetermined relationships to optimize resource allocation, allowing for efficient frequency division multiplexing without gaps, even when different UEs use different RBG sizes, by configuring RBG sets with nested relationships and using bitmap resource allocation methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the system bandwidth is expanded in future radio communication systems, then the data transmission capacity is improved, but the resource allocation efficiency deteriorates when using existing LTE methods
Solution Approach 1:
The patent divides the frequency domain resources into multiple Resource Block Groups (RBGs) with different sizes. By segmenting the bandwidth into variable-sized RBGs rather than fixed-size blocks, the system can adapt to different bandwidth configurations and waveform types, thereby maintaining high resource allocation efficiency even when system bandwidth is expanded.
Solution Approach 2:
The patent introduces dynamic RBG size configuration where the size of each RBG can be adjusted based on the waveform type (DFT-s-OFDM or CP-OFDM) and bandwidth configuration. This dynamic adaptation allows the system to optimize resource allocation efficiency for different scenarios while supporting expanded system bandwidth.
2Adaptability or versatility
If different bandwidths are configured per UE in the system bandwidth, then the adaptability is improved, but the resource allocation complexity increases
Solution Approach 1:
The patent applies different RBG sizes to different frequency domains based on the UE's configured bandwidth and waveform type. Each UE receives customized RBG configuration tailored to its specific requirements, allowing high adaptability while managing complexity through localized optimization rather than system-wide complexity.
Solution Approach 2:
The patent changes the RBG size parameter dynamically based on the UE's bandwidth configuration and waveform type. By adjusting this key parameter, the system achieves flexible bandwidth configuration per UE without requiring complete redesign of the resource allocation mechanism, thus managing complexity effectively.
3Ease of manufacture
If allocation is controlled in RBG units similar to existing LTE, then the implementation simplicity is maintained, but the resource use efficiency decreases in expanded bandwidth systems
Solution Approach 1:
The patent segments the frequency domain into RBGs and applies variable sizing to these segments. This maintains the RBG-based allocation framework familiar from LTE (preserving implementation simplicity) while introducing size variability to improve resource use efficiency in expanded bandwidth systems.
Solution Approach 2:
The patent creates a universal RBG allocation mechanism that works across different waveform types (DFT-s-OFDM and CP-OFDM) and bandwidth configurations. The same basic RBG framework serves multiple functions and scenarios, maintaining implementation simplicity while achieving high resource use efficiency through flexible configuration.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
To appropriately control resource allocation in a frequency direction in a future radio communication system that expands a system bandwidth, a user terminal according to one aspect of the present invention includes: a reception section that receives downlink control information; and a control section that decides allocation of a DL shared channel and/or a UL shared channel in Resource Block Group (RBG) units based on resource allocation information included in the downlink control information, and a plurality of RBG size candidates are defined as a size of the RBG, and the control section selects a specified RBG size from a specified RBG set configured by part of RBG size candidates of the plurality of RBG size candidates based on information notified from a base station, and decides the allocation.