IAB Backhaul Slice Isolation for Reliable High-Priority 5G Traffic
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Solution Overview
Problem
The 5G mobile communication system faces challenges in ensuring end-to-end slice resource isolation and prioritized, reliable communication of high-priority services due to the lack of efficient resource management in integrated access and backhaul (IAB) architectures, particularly in scenarios involving high-frequency small cell networking and remote areas where optical fiber deployment is costly and difficult.
Innovation Solution
Implementing end-to-end slice resource isolation by using slice identifiers to establish reserved resources for backhaul RLC channels, ensuring that high-priority services utilize specific slice resources through methods such as priority, dedicated, or shared resources, and managing slice resource congestion to ensure reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical fiber backhaul is deployed for densely deployed small cells to meet ultra-high capacity conditions, then network capacity and reliability are improved, but deployment cost and difficulty increase significantly
Solution Approach 1:
The patent replaces the mechanical/optical fiber deployment system with a wireless backhaul system using IAB nodes. High-frequency carriers provide wireless backhaul links between IAB nodes and donor nodes, eliminating the need for physical optical fiber deployment in dense small cell networks, thus reducing deployment cost and difficulty while maintaining network reliability
Solution Approach 2:
The patent utilizes high-frequency carrier parameters (abundant frequency resources) to achieve ultra-high capacity wireless backhaul. By changing from low-frequency to high-frequency carriers, the system gains sufficient bandwidth capacity to replace optical fiber backhaul in dense small cell scenarios
2Area of stationary object
If optical fiber deployment is extended to remote areas to provide network coverage, then coverage area is improved, but deployment cost increases significantly
Solution Approach 1:
The patent replaces optical fiber deployment in remote areas with wireless IAB backhaul links. IAB nodes establish wireless connections to donor nodes, providing network coverage in remote areas without requiring expensive and difficult optical fiber infrastructure extension
Solution Approach 2:
The IAB node serves multiple functions: it provides wireless access to user equipment while simultaneously establishing wireless backhaul links to donor nodes. This multi-functionality enables flexible deployment in remote areas where optical fiber is impractical
3Reliability
If slice resource isolation is not implemented in IAB architecture, then system complexity is reduced, but prioritized and reliable communication of high-priority services cannot be ensured
Solution Approach 1:
The patent segments network resources into different slices with distinct priorities. High-priority services are allocated dedicated slice resources separated from low-priority services, ensuring that critical communications receive guaranteed resources and maintain reliable transmission even under network congestion
Solution Approach 2:
The patent applies different quality characteristics to different slice resources. High-priority slices receive enhanced resource allocation and protection mechanisms, while low-priority slices use standard resources, enabling differentiated service quality without uniform complexity increase across the entire system
Data Source
AI summary
A communication method. A first donor node generates first information, where the first information is usable to indicate a slice corresponding to a first backhaul radio link control (RLC) channel, and the first backhaul RLC channel is a backhaul RLC channel corresponding to a first integrated access and backhaul (IAB) node. The first donor node sends the first information to the first IAB node. In this method, the first information is usable to indicate the slice corresponding to the first backhaul RLC channel corresponding to the first IAB node.