A Flexible IAB Architecture for Beyond 5G Network

Q1 Social Sciences IEEE Communications Standards Magazine Pub Date : 2023-09-01 DOI:10.1109/mcomstd.0009.2200018

Shashi Ranjan, Pranav Jha, Abhay Karandikar, Prasanna Chaporkar

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Abstract

Integrated access and backhaul (IAB) is an innovative wireless backhaul solution to provide cost-efficient deployment of small cells for successful 5G adoption. Besides, IAB can utilize the same spectrum for access and backhaul purposes. The 3GPP has standardized IAB in Release 16 and may incorporate a few enhancements in the upcoming releases. The 3GPP IAB architecture, however, suffers from some limitations, such as it does not support mobile relays or dual-connectivity. This article presents a novel IAB architecture that addresses these limitations and is transparent to legacy operations of the 5G system. The architecture also supports multi-RAT coexistence where access and backhaul may belong to different RATs. These factors (and many others) enable operators to capitalize on the architecture for deploying IAB anywhere in a plug-and-play manner. We also show the merits of the architecture by evaluating its capacity and mobility robustness compared to the 3GPP architecture. Simulation results corroborate our design approach. Owing to its robust design, the architecture can contend for standardization in B5G system.

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面向超5G网络的灵活IAB架构

集成接入和回程(IAB)是一种创新的无线回程解决方案，可为成功采用5G提供经济高效的小型蜂窝部署。此外，IAB可以利用相同的频谱进行接入和回程。3GPP在Release 16中对IAB进行了标准化，并可能在即将发布的版本中包含一些增强功能。然而，3GPP IAB架构存在一些限制，例如它不支持移动中继或双连接。本文提出了一种新的IAB架构，该架构解决了这些限制，并且对5G系统的传统操作透明。该体系结构还支持多rat共存，其中访问和回程可能属于不同的rat。这些因素(以及许多其他因素)使运营商能够利用架构，以即插即用的方式在任何地方部署IAB。与3GPP架构相比，我们还通过评估其容量和移动性健壮性来展示该架构的优点。仿真结果证实了我们的设计方法。由于其健壮的设计，该架构可以在B5G系统中竞争标准化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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