OFDM Numerology Resource Allocation With Overlapping Time-Frequency Sets
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Solution Overview
Problem
The existing radio resource allocation methods in 5G mobile communication systems face challenges in efficiently managing multiple OFDM numerology schemes, leading to suboptimal allocation of time-frequency resources across different services with diverse requirements, such as eMBB, mMTC, and URLLC, which demand varying subcarrier spacings, symbol durations, and bandwidths.
Innovation Solution
A method is introduced where multiple numerology schemes are defined, each partitioning time-frequency radio resources into resource scheduling units differently, with overlapping reference resource sets in the frequency and time domains, allowing for dynamic and flexible allocation of resources based on scheduling intervals specific to each scheme, enabling efficient multiplexing and resource sharing among services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple OFDM numerology schemes are supported with different subcarrier spacings and symbol durations, then the system can meet diverse service requirements (eMBB, URLLC, mMTC), but the resource allocation complexity increases
Solution Approach 1:
The patent segments the time-frequency resource grid into multiple reference resource sets, where each reference resource set corresponds to a specific numerology scheme. This segmentation allows independent resource allocation for each numerology while maintaining overall system coordination, thereby managing complexity through structured division.
Solution Approach 2:
The patent introduces a new dimension of resource organization by defining reference resource sets that span multiple numerology schemes simultaneously. This multi-dimensional resource view enables the scheduler to allocate resources across different numerologies in a unified manner, transforming the complex multi-numerology problem into a structured multi-dimensional allocation task.
2Productivity
If reference resource sets for different numerology schemes overlap in frequency and time domains, then resource utilization efficiency improves, but resource allocation management becomes more difficult
Solution Approach 1:
The patent implements dynamic resource allocation where the scheduler can flexibly assign overlapping reference resource sets to different services based on real-time traffic demands. The overlapping structure enables dynamic sharing of time-frequency resources among multiple numerology schemes, with the scheduler adapting allocations according to service priorities and channel conditions.
Solution Approach 2:
The reference resource sets are designed to serve multiple numerology schemes simultaneously, making them universal resources that can be allocated to different services with different numerology requirements. This multi-functionality allows the same physical resources to be efficiently utilized across eMBB, URLLC, and mMTC services.
3Productivity
If dynamic resource reconfiguration is performed according to traffic demands, then system efficiency enhances, but signaling overhead increases
Solution Approach 1:
The patent performs preliminary resource allocation at the reference resource set level before actual data transmission. By establishing resource allocations in advance based on traffic predictions and service requirements, the system reduces the need for frequent dynamic reconfiguration signaling, thereby lowering overhead while maintaining efficiency.
Solution Approach 2:
The patent enables flexible parameter configuration for different numerology schemes, allowing the system to adapt resource allocation by changing parameters such as subcarrier spacing, symbol duration, and reference resource set assignments. This parameter-based flexibility achieves dynamic resource optimization without requiring complete reconfiguration of the resource grid.
Data Source
AI summary
The present disclosure relates to a resource allocation procedure for allocating time-frequency radio resources by a scheduler in a mobile communication system. A plurality of numerology schemes are defined, each partitioning a plurality of radio resources of the mobile communication system into resource scheduling units in a different manner. A reference resource set is defined per numerology scheme, each being associated to a set of radio resources usable for being allocated according to the respective numerology scheme. The reference resource set of at least one numerology scheme overlaps with the reference resource set of at least another numerology scheme in the frequency and/or time domain. The resource allocation procedure is performed for allocating radio resources to one or more user terminals according to the numerology schemes. The resource allocation procedure is performed for each numerology scheme based on a scheduling time interval defined for the respective numerology scheme.