Dynamic Spectrum Sharing Interleaving Scheduler for RF Resource Optimization
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Solution Overview
Problem
Wireless networks face inefficiencies in utilizing radio frequency (RF) resources across different radio access technologies (RATs) like LTE and 5G, leading to suboptimal allocation and utilization of resources due to varying demands and usage patterns among User Equipment (UEs).
Innovation Solution
A dynamic spectrum sharing (DSS) interleaving scheduler (DIS) is introduced to dynamically assign UEs to groups based on load balancing and usage metrics, optimizing the allocation of RF resources in the time and frequency domains by prioritizing uplink and downlink scheduling and reallocating unused or underutilized PRBs across different time slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RF resources are allocated statically across different RATs, then resource allocation is simple and stable, but resource utilization efficiency deteriorates due to varying demands and usage patterns
Solution Approach 1:
The patent implements dynamic scheduling by dividing time slots into different types (first type for 5G NR, second type for LTE) and dynamically selecting which type to use in each time slot based on real-time resource request status from UEs. This allows the system to adapt resource allocation to varying demands while maintaining manageable complexity through structured time slot classification.
Solution Approach 2:
The patent segments time slots into distinct types (first type and second type) with different scheduling characteristics. By segmenting the time domain resources and associating them with different RATs, the system can efficiently handle varying traffic patterns for 5G NR and LTE UEs separately, improving overall resource utilization without overwhelming scheduling complexity.
2Productivity
If RF resources are allocated to prioritize one RAT, then that RAT achieves better performance, but the other RAT suffers from resource starvation and reduced utilization
Solution Approach 1:
The patent employs periodic alternation between different time slot types, where first type time slots are allocated to 5G NR UEs and second type time slots to LTE UEs. This periodic switching ensures that each RAT receives dedicated resource opportunities regularly, preventing resource starvation while maintaining good performance for both RATs through structured time-division multiplexing.
3Productivity
If unused PRBs are left unallocated, then scheduling is simple, but resource waste increases and overall utilization decreases
Solution Approach 1:
The system enables self-service resource allocation by monitoring resource request status from UEs and automatically selecting appropriate time slot types and allocating PRBs based on actual demand. When 5G NR UEs have resource requests, first type time slots are used; when LTE UEs have requests, second type time slots are used. This self-adaptive mechanism eliminates resource waste without requiring complex centralized scheduling for every decision.
Data Source
AI summary
A system described herein may provide a scheduling technique for physical radio frequency (“RF”) resources of a base station of a radio access network (“RAN”) of a wireless network. Resources for a first group of User Equipment (“UEs”) may be allocated during or prior to a first time slot, and the UEs may be notified during the first time slot of the allocated resources. The allocated resources may be provided during a subsequent second time slot. A second group of UEs may be notified, during the first time slot, of physical RF resources allocated for downlink data for the second group of resources, and such downlink data may be provided to the second group of UEs during the first time slot via the allocated physical RF resources. The assignments of the UEs to the respective groups may change over time based on network load or other metrics.