Performance Comparison of R-PHY and R-MACPHY Modular Cable Access Network Architectures

Alharbi, Ziyad; Thyagaturu, Akhilesh S.; Reisslein, Martin; Elbakoury, Hesham; Zheng, Ruobin

doi:10.1109/tbc.2017.2711145

Cited by 9 publications

(7 citation statements)

References 79 publications

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“…In [176], the remote PHY (R-PHY) and the remote PHY-MAC (R-PHYMAC) based modular broadcast cable network is proposed for the access network. In this architecture, R-PHYMAC can achieve lower mean upstream packet delay compared to R-PHY for bursty traffic and long distance over 100 miles.…”

Section: J Cran and Other Aspectsmentioning

confidence: 99%

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

Parvez

Rahmati

Güvenç

et al. 2018

IEEE Commun. Surv. Tutorials

764

395

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The fifth generation (5G) wireless network technology is to be standardized by 2020, where main goals are to improve capacity, reliability, and energy efficiency, while reducing latency and massively increasing connection density. An integral part of 5G is the capability to transmit touch perception type real-time communication empowered by applicable robotics and haptics equipment at the network edge. In this regard, we need drastic changes in network architecture including core and radio access network (RAN) for achieving end-to-end latency on the order of 1 ms. In this paper, we present a detailed survey on the emerging technologies to achieve low latency communications considering three different solution domains: RAN, core network, and caching. We also present a general overview of 5G cellular networks composed of software defined network (SDN), network function virtualization (NFV), caching, and mobile edge computing (MEC) capable of meeting latency and other 5G requirements.

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Section: J Cran and Other Aspectsmentioning

confidence: 99%

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

Parvez

Rahmati

Güvenç

et al. 2018

IEEE Commun. Surv. Tutorials

764

395

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“…Furthermore, means of reducing the fronthaul bitrate requirements and supporting statistical multiplexing through the caching of repetitive quadrature amplitude modulation (QAM) symbols in the R-FFT node were proposed. The Remote PHY (R-PHY) and Remote MACPHY (R-MACPHY) modular cable access network architectures were compared in [30]. In the former architecture, the PHY layer processing is implemented in the remote node (RN) that is close to the cable modems (CMs), and for the upstream transmissions, the medium access control (MAC) layer processing is handled in the headend, while for the latter architecture, both PHY and MAC layers are processed in the RN.…”

Section: Transport Solutionsmentioning

confidence: 99%

Towards Enhanced Mobile Broadband Communications: A Tutorial on Enabling Technologies, Design Considerations, and Prospects of 5G and beyond Fixed Wireless Access Networks

et al. 2021

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There has been a growing interconnection across the world owing to various multimedia applications and services. Fixed wireless access (FWA) is an attractive wireless solution for delivering multimedia services to different homes. With the fifth-generation (5G) and beyond mobile networks, the FWA performance can be enhanced significantly. However, their implementation will present different challenges on the transport network due to the incessant increase in the number of required cell-sites and the subsequent increase in the per-site requirements. This paper presents a comprehensive tutorial on the enabling technologies, design considerations, requirements, and prospects of broadband schemes. Furthermore, the related technical challenges of FWA are reviewed, and we proffer potential solutions to address them. Besides, we review various transport network options that can be employed for FWA deployment. In this regard, we offer an in-depth discussion on their related requirements for different use cases. Moreover, we give an insight into the 3GPP RAN functional split implementations and implications on the 5G FWA transport network solutions. The concepts of virtualized RANs for attending flexibly to the dynamic nature of different use cases are also presented.

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“…Broadcast cable access networks have been extensively studied for providing wired broadband Internet access to residential users [13]- [22]. Recent studies have examined the impact of the distance between the remote node and cable headend on the medium access control (MAC) performance of the R-PHY modular architecture (which conducts all physical layer processing in the remote node and the MAC in the headend) and the R-MACPHY architecture (which conducts all physical layer processing plus the MAC in the remote node) [2], [4]. The studies found that the modular R-PHY architecture gives good throughput-delay performance for short headend-to-remote node distances up to around 100 km.…”

Section: Related Workmentioning

confidence: 99%

“…(15)], while the LTE traffic bitrate stayed unchanged at the baseband split rate R B [Eqn. (2)]. The presented delay results represent therefore a conservative assessment of the proposed R-FFT operation in that a consequent transition to R-FFT operation that includes the transition from the conventional CRAN baseband split to the proposed R-FFT split would reduce the LTE traffic portion.…”

Section: Delay Evaluationmentioning

confidence: 99%

“…In broadcast cable networks, the Modular Headend Architecture version 2 (MHAv2) [1] implements the Cable Modem Termination System (CMTS) functions in a modular fashion. Specifically, in the R-PHY architecture [2]- [4], a digital fiber Please direct correspondence to M. Reisslein. A. Thyagaturu, Z.Alharbi, and M. Reisslein are with the School of Electrical, Computer, and Energy Eng., Arizona State Univ., Tempe, AZ 85287-5706, USA (e-mail: {athyagat, zalharbi, reisslein}@asu.edu).…”

Section: A Motivation: Modular Cable Docsis and Cellular Lte Architec...mentioning

confidence: 99%

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R-FFT: Function Split at IFFT/FFT in Unified LTE CRAN and Cable Access Network

Thyagaturu

Alharbi

Reisslein

2018

IEEE Trans. on Broadcast.

Self Cite

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The Remote-PHY (R-PHY) modular cable network for Data over Cable Service Interface Specification (DOCSIS) service conducts the physical layer processing for the transmissions over the broadcast cable in a remote node. In contrast, the cloud radio access network (CRAN) for Long-Term Evolution (LTE) cellular wireless services conducts all baseband physical layer processing in a central baseband unit and the remaining physical layer processing steps towards radio frequency (RF) transmission in remote nodes. Both DOCSIS and LTE are based on Orthogonal Frequency Division Multiplexing (OFDM) physical layer processing. We propose to unify cable and wireless cellular access networks by utilizing the hybrid fiber-coax (HFC) cable network infrastructure as fiber fronthaul network for cellular wireless services. For efficient operation of such a unified access network, we propose a novel Remote-FFT (R-FFT) node that conducts the physical layer processing from the Fast-Fourier Transform (FFT) module towards the RF transmission, whereby DOCSIS and LTE share a common FFT module. The frequency domain in-phase and quadrature (I/Q) symbols for both DOCSIS and LTE are transmitted over the fiber between remote node and cable headend, where the remaining physical layer processing is conducted. We further propose to cache repetitive quadrature amplitude modulation (QAM) symbols in the R-FFT node to reduce the fronthaul bitrate requirements and enable statistical multiplexing. We evaluate the fronthaul bitrate reductions achieved by R-FFT node caching, the fronthaul transmission bitrates arising from the unified DOCSIS and LTE service, and illustrate the delay implications of moving part of the cable R-PHY remote node physical layer processing to the headend. Overall, our evaluations indicate that the proposed R-FFT node can effectively support unified DOCSIS and LTE services over the HFC cable plant while substantially reducing the fronthaul bitrate requirements of the existing CRAN structures.

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Performance Comparison of R-PHY and R-MACPHY Modular Cable Access Network Architectures

Cited by 9 publications

References 79 publications

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

A Survey on Low Latency Towards 5G: RAN, Core Network and Caching Solutions

Towards Enhanced Mobile Broadband Communications: A Tutorial on Enabling Technologies, Design Considerations, and Prospects of 5G and beyond Fixed Wireless Access Networks

R-FFT: Function Split at IFFT/FFT in Unified LTE CRAN and Cable Access Network

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