Dave Townend

Fronthaul Resiliency in Latency Constrained C-RAN

Dave Townend, Anvar Tukmanov, Stuart D Walker

This paper presents mobile network deploymentanalysis aimed at understanding the feasibility of resilient fronthaul in a centralized radio access network (C-RAN). A fiber and network infrastructure topology model is built using representative data sets to assess latency characteristics for cell sites with …

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Hybrid Centralized-Distributed Precoding in Fronthaul-Constrained CF-mMIMO Systems

Zahra Mobini, Hien Quoc Ngo, Ardavan Rahimian, Anvar Tukmanov et autres

We investigate a fronthaul-limited cell-free massive multiple-input multiple-output (CF-mMIMO) system and propose a hybrid centralized-distributed precoding strategy that dynamically adapts to varying fronthaul and spectral efficiency (SE) requirements. The proposed approach divides users into two groups: one served by centralized precoding and …

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C-RAN and Optical Fronthaul Latency in Representative Network Topologies

Dave Townend, Stuart D. Walker, Neil T. Parkin, Anvar Tukmanov

This paper presents a feasibility study aimed at understanding centralized radio access network (C-RAN) deployments based on incumbent distributed radio access network (D-RAN) topologies. A model is derived to allow realistic latency characteristics to be calculated for fronthaul connectivity between existing cell …

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Cell Site Densification Using mmWave and Sub-THz Line-of-Sight Wireless Fronthaul: A Deployment Feasibility Study

Dave Townend, Stuart D. Walker, Anvar Tukmanov, Andy Sutton

This article presents a mobile network deployment analysis aimed at understanding the use of high-frequency wireless fronthaul links to realize dense cell network architectures. A high-resolution digital twin model is built based on real-world datasets to identify line-of-sight (LoS) propagation paths between …

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Toward Wireless Fronthaul for Cloud RAN Architectures

Dave Townend, Ryan Husbands, Stuart D. Walker, Adrian Sharples

The application of wireless backhaul is widely adopted in commercial mobile networks as a cost effective alternative to fibre. However, the practical use of wireless transport to support new cloud RAN architectures is not well studied. This paper presents proof-of-concept results which …

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Challenges and Opportunities in Wireless Fronthaul

Dave Townend, Ryan Husbands, Stuart D. Walker, Andy Sutton

To date the evolution from traditional distributed radio access networks (D-RAN) towards fronthaul oriented centralized (C-RAN) architectures has imposed significant challenges for the underlying transport network. The processing and coordination benefits anticipated in C-RAN are generally underpinned with the assumption of a …

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Urban Wireless Multi-hop x-Haul for Future Mobile Network Architectures

Dave Townend, Stuart D. Walker, Adrian Sharples, Andy Sutton

This paper presents a mobile network deployment analysis aimed at understanding the potential use of high frequency (mmWave) wireless ‘x-haul’ to deploy new urban street level micro cell sites. A highly detailed 3D environmental model of central London is constructed and the …

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Line-of-Sight Probability for Urban Microcell Network Deployments

Dave Townend, Stuart D. Walker, Adrian Sharples, Andy Sutton

In this paper we present a new line-of-sight probability model for the urban micro cellular deployment scenario. This study utilises a high resolution 3D model of central London to conduct large scale ray-tracing of direct propagation paths between neighbouring lamp posts. These …

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A Unified Line-of-Sight Probability Model for Commercial 5G Mobile Network Deployments

Dave Townend, Stuart D. Walker, Adrian Sharples, Andy Sutton

In this paper we present a novel analytical approach used to derive a new multi-scenario line-of-sight (LOS) probability model for cellular network deployments in the UK. The approach considers the use of lamp post databases as statistically representative geo-spatial data points for …

Urban Line-of-Sight Probability for mmWave Mobile Access and Fronthaul Transmission Hubs

Dave Townend, Stuart D. Walker, Adrian Sharples, Andy Sutton

The line-of-sight (LOS) probability model is a fundamental tool in evaluating high frequency (mmWave) mobile network deployments. This paper utilises a large scale 1875 sq km, high resolution environmental model of representative UK cities to analyse the statistical LOS properties of urban …

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A 3D Statistical Framework for the UK’s Mobile Network

Dave Townend, Stuart D. Walker

A key challenge in deploying new wireless cellular technologies or architectures is accurate modelling of their impact on the wider network. In this contribution, we provide a new statistical framework and large scale analysis to characterise a real mobile network. Current industry …

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Atmospheric impact on the performance of a 60GHz point-to-point link for 5G infrastructures

Nigel Linge, Robby Odum, Spencer A. Hill, S. Von-Hunerbein et autres

There is growing interest in the use of millimeter-wave spectrum as a potential candidate for the provision of high capacity, short range, back-haul solutions within future 5G ultra-dense network infrastructures. However, it is recognized that these frequencies are highly susceptible to atmospheric …

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