Low Latency Techniques for Mobile Backhaul over DOCSIS

The mobile network operators (MNOs) are looking into economically viable backhaul solutions as alternatives to fiber, specifically the hybrid fiber coaxial networks (HFC). When the latencies from both the wireless and the HFC networks are added together, the result is a noticeable end-to-end system...

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Bibliographic Details
Published in:arXiv.org 2022-11
Main Authors: Chapman, John T, Andreoli-Fang, Jennifer, Chauvin, Michel, Elias Chavarria Reyes, Lu, Zheng, Liu, Dantong, Padden, Joey, Bernstein, Alon
Format: Article
Language:English
Subjects:
Broadband
Hydrofluorocarbons
Network latency
Test stands
Wireless networks
Online Access:Get full text
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Summary:The mobile network operators (MNOs) are looking into economically viable backhaul solutions as alternatives to fiber, specifically the hybrid fiber coaxial networks (HFC). When the latencies from both the wireless and the HFC networks are added together, the result is a noticeable end-to-end system latency, particularly under network congestion. In order to decrease total system latency, we proposed a method to improve upstream user- to-mobile core latency by coordinating the LTE and HFC scheduling in previous papers. In this paper, we implement and optimize the proposed method on a custom LTE and DOCSIS end-to-end system testbed. The testbed uses the OpenAirInterface (OAI) platform for the LTE network, along with Cisco's broadband router cBR-8 that is currently deployed in the HFC networks around the world. Our results show a backhaul latency improvement under all traffic load conditions.
ISSN:2331-8422
DOI:10.48550/arxiv.2211.08298