RAN Coordination for Multi-Service Resource Conflict Avoidance
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Solution Overview
Problem
Current mobile networks face challenges in coordinating multiple radio connections served by different RANs, particularly in scenarios where UE needs to use both LTE and V2X services simultaneously, and in ensuring resource sharing and optimization across network slices for critical services like automotive or factory automation, which require ultra-high reliability and low latency.
Innovation Solution
The solution involves an apparatus and method for RAN level coordination that monitors and determines resource allocation schemes to avoid conflicts, using semi-persistent scheduling (SPS) across multiple serving RANs, allowing only one RAN to use dynamic scheduling while others use coordinated SPS, and translating parameters between different networks to ensure seamless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RANs serve a UE simultaneously with dynamic scheduling, then service coverage and flexibility are improved, but resource allocation conflicts and coordination complexity increase
Solution Approach 1:
The patent segments the scheduling function across multiple RANs by designating one RAN as the scheduling RAN and others as non-scheduling RANs. This segmentation allows the UE to be served by multiple RANs simultaneously while avoiding conflicts, as only the scheduling RAN dynamically allocates resources. The scheduling RAN determines resource allocations for the UE, while non-scheduling RANs refrain from conflicting allocations, thereby reducing coordination complexity while maintaining service coverage.
2Productivity
If multiple RANs allocate resources dynamically to a UE, then resource utilization flexibility is improved, but resource allocation conflicts increase
Solution Approach 1:
The patent inverts the traditional approach where all RANs independently perform dynamic scheduling. Instead, it designates one RAN as the scheduling RAN that performs dynamic scheduling, while other non-scheduling RANs are restricted from performing dynamic scheduling for the same UE. This inversion eliminates resource allocation conflicts because only one RAN has the authority to dynamically allocate resources, while maintaining flexibility through coordinated semi-persistent scheduling in non-scheduling RANs.
3Adaptability or versatility
If all RANs use dynamic scheduling for a UE, then scheduling adaptability is improved, but coordination overhead and latency increase
Solution Approach 1:
The patent employs semi-persistent scheduling in non-scheduling RANs, where resource allocations are made periodically rather than dynamically for each transmission. This periodic action reduces coordination overhead and latency because non-scheduling RANs do not need to continuously communicate with the scheduling RAN for each resource allocation decision. The semi-persistent allocations follow predetermined patterns, eliminating the need for real-time coordination while maintaining scheduling adaptability through the scheduling RAN's dynamic decisions.
Data Source
AI summary
It is provided a method, including monitoring if a capability information on a capability of a first network for semi-persistent scheduling of a resource for a terminal is received; determining, if the capability information is received, a second allocation scheme of the resource for the terminal such that an allocation of the resource according to the second allocation scheme is not in conflict with an allocation of the resource according to a first allocation scheme derived from the received capability information; controlling an allocation device of a second network to allocate the resource to the terminal according to the second allocation scheme.