Single Carrier Resource Block Grid Allocation for Wireless FDM
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing grid allocations for single carrier waveforms, particularly in implementing frequency division multiplexing, which is complex and insufficient for single carrier waveforms, leading to delays and inefficiencies in resource utilization and power management.
Innovation Solution
The method involves determining a grid allocation of single carrier resource blocks (SC-RBs) in both the time and frequency domains, enabling frequency division multiplexed transmissions between nodes, which simplifies scheduling and reduces implementation complexity by aggregating SC-RBs and using SC-RB hopping patterns to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency division multiplexing is implemented for single carrier waveforms, then spectral efficiency is improved, but implementation complexity increases
Solution Approach 1:
The patent segments the frequency spectrum into discrete single-carrier resource blocks (SC-RBs) that can be independently allocated and multiplexed. This segmentation enables FDM of single carrier waveforms by creating manageable frequency units that can be assigned to different users or channels, thereby improving spectral efficiency while maintaining single carrier properties within each block.
Solution Approach 2:
The patent introduces a time-domain dimension to the frequency resource allocation by implementing SC-RB hopping patterns across multiple time slots. This transforms the resource allocation from a static frequency-domain approach to a dynamic time-frequency approach, enabling FDM while reducing implementation complexity through structured temporal patterns.
2Productivity
If single carrier resource blocks are allocated in time and frequency domains, then resource utilization is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements dynamic SC-RB allocation where resource blocks can hop between frequency positions across different time slots according to predefined patterns. This dynamic allocation allows the system to adapt to varying channel conditions and traffic requirements, improving resource utilization while the structured hopping patterns keep scheduling complexity manageable.
Solution Approach 2:
The patent changes the allocation parameters from static frequency assignments to time-varying frequency positions defined by hopping patterns. By parameterizing the resource allocation with hop indices and pattern configurations, the system achieves flexible resource utilization with controlled scheduling complexity through standardized parameter management.
3Use of energy by moving object
If single carrier waveforms are used, then peak-to-average power ratio is reduced, but frequency division multiplexing capability is insufficient
Solution Approach 1:
The patent merges the advantages of single carrier waveforms (low PAPR) with the multiplexing capabilities of FDM by combining multiple single-carrier signals in the frequency domain. Each signal maintains its single-carrier properties within allocated SC-RBs, preserving low PAPR, while the overall system achieves FDM capability through frequency-domain resource allocation and multiplexing of multiple SC-RB assignments.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first node may determine a grid allocation of single carrier resource blocks (SC-RBs) that defines a plurality of SC-RBs in a time domain and in a frequency domain. The first node may perform, to a second node, a frequency division multiplexed transmission associated with a single carrier waveform using one or more SC-RBs indicated in the grid allocation of SC-RBs. Numerous other aspects are described.