OFDM Numerology Scheduling With Overlapping Reference Resource Sets
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Solution Overview
Problem
The challenge in 5G mobile communication systems is efficiently allocating time-frequency radio resources across different OFDM numerology schemes to support diverse services with varying requirements such as eMBB, mMTC, and URLLC, which demand different subcarrier spacings, symbol durations, and bandwidths, while ensuring flexible multiplexing and resource sharing.
Innovation Solution
A method is introduced where a scheduler dynamically allocates time-frequency radio resources by defining reference resource sets for each numerology scheme, allowing overlap in the frequency and time domains, enabling flexible multiplexing and resource reuse across numerology schemes based on scheduling intervals specific to each service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple OFDM numerology schemes are used to support diverse services (eMBB, mMTC, URLLC), then service adaptability and system versatility are improved, but resource allocation complexity and device complexity increase
Solution Approach 1:
The patent segments the time-frequency resource grid into multiple reference resource sets, where each reference resource set is specifically designed for a particular numerology scheme. This segmentation allows independent optimization and management of resources for each numerology (e.g., different subcarrier spacings, symbol durations) without interfering with other numerologies, thereby reducing the overall allocation complexity while maintaining support for diverse services
Solution Approach 2:
The patent introduces a new dimension of organization by defining reference resource sets along the numerology dimension. Instead of managing all resources in a single unified pool, resources are organized into multiple dimensions: frequency resources, time resources, and numerology-specific reference resource sets. This multi-dimensional organization simplifies the allocation process by providing structured access paths for different service types
2Productivity
If reference resource sets overlap in frequency and time domains to enable flexible multiplexing, then resource utilization efficiency is improved, but resource allocation difficulty and measurement precision requirements increase
Solution Approach 1:
The patent implements dynamic resource allocation where the scheduler can flexibly assign resources from overlapping reference resource sets based on real-time service requirements. The reference resource sets are defined with overlapping frequency and time resources, allowing the system to dynamically select and combine resources from different numerology schemes to meet varying service demands (e.g., allocating wideband resources for eMBB or narrowband resources for mMTC), thereby maximizing resource utilization efficiency
Solution Approach 2:
The patent introduces a scheduler as an intermediary component that manages the complex allocation of resources from overlapping reference resource sets. The scheduler receives service requests, determines the appropriate numerology scheme, and allocates resources from the corresponding reference resource sets. This intermediary layer abstracts the complexity of managing overlapping resources, providing a simplified interface for resource allocation while enabling efficient utilization of the overlapping reference resource sets
3Reliability
If dynamic resource allocation is performed for each numerology scheme based on specific scheduling intervals, then service-specific performance is improved, but processing time and system complexity increase
Solution Approach 1:
The patent performs preliminary organization of resources by pre-defining reference resource sets for each numerology scheme before actual service allocation occurs. These reference resource sets are configured with appropriate frequency resources, time resources, and numerology parameters (subcarrier spacing, symbol duration) tailored to specific service requirements. This preliminary structuring enables faster runtime allocation decisions, as the scheduler only needs to select from pre-configured reference resource sets rather than creating allocations from scratch, thereby reducing processing time while maintaining service-specific performance
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.