IAB Node Relay Architecture for 5G Backhaul Connectivity
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Solution Overview
Problem
In 5G communication networks, managing Integrated Access Backhaul (IAB) nodes is challenging due to the complexity and cost of deploying independent backhaul connectivity for each Radio Access Network (RAN) node, especially at higher frequencies where coverage is limited, leading to a need for efficient relay mechanisms to extend range and overcome obstacles.
Innovation Solution
The implementation of IAB nodes with a transceiver and processor configured to perform authentication, setup IP connectivity with an OAM server, establish a F1 interface between the IAB node and an IAB donor, and provide services to User Equipment (UE) by acting as a relay node, enabling multi-hop backhauling and efficient IP connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent backhaul connectivity is deployed for each RAN node, then network reliability is improved, but device complexity and deployment cost increase
Solution Approach 1:
The patent introduces IAB nodes as intermediary relay nodes between RAN nodes without direct backhaul connectivity and the core network. These IAB nodes establish wireless backhaul links to donor IAB nodes or gNBs, enabling indirect connectivity for remote RAN nodes. This intermediary approach maintains network reliability by providing backhaul paths while avoiding the complexity of direct backhaul deployment to every node.
2Speed
If higher frequency bands are used for 5G deployment, then data rate is improved, but coverage range deteriorates
Solution Approach 1:
The patent extends coverage in the spatial dimension by deploying IAB relay nodes at strategic locations between the core network and remote areas. This creates a multi-hop wireless backhaul path that physically extends the network coverage range while maintaining high-frequency band operation for data transmission, effectively solving the coverage limitation of mmWave frequencies.
3Adaptability or versatility
If network density is increased to provide flexible deployment, then service coverage is improved, but infrastructure cost increases
Solution Approach 1:
The patent designs IAB nodes with multi-functionality, serving both as access points for UEs and as relay nodes for wireless backhaul. This universal design allows a single infrastructure element to perform multiple functions, providing flexible deployment capability while reducing the total quantity of infrastructure needed compared to traditional architectures requiring separate access and backhaul components.
Data Source
AI summary
Provided are methods and apparatuses for performing a communication in a wireless communication system. An IAB node of performing a communication, according to an embodiment, includes a transceiver and a processor coupled with the transceiver and configured to perform an authentication and a setup of an IP connectivity with an OAM (operations, administration and maintenance) server, in response to an architecture in which a DU (distribution unit) and a CU (central unit) are split, establish a F1 interface between a DU of the IAB node and a CU of an IAB donor, and provide a service to a UE based on a result of the establishment.