Handover Reduction in Virtualized Cloud Radio Access Networks Using TWDM-PON Fronthaul

Wang, Xinbo; Wang, Lin; Çavdar, Çiçek; Tornatore, Massimo; Figueiredo, Gustavo B.; Chung, Hwan Seok; Lee, Han Hyub; Park, Soomyung; Mukherjee, Biswanath

doi:10.1364/jocn.8.00b124

Cited by 32 publications

(19 citation statements)

References 16 publications

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“…However, even reducing CoMP latency, the centralization of baseband processing showed an increasingly latency related to the queuing of baseband processing as the cloud processor become busy. In [17], using VPON for CRAN, authors were able to demonstrate reductions of the number of handovers and throughput improvement. Authors in [18] proposed the use of a flexi-grid optical network to implement the fronthaul.…”

Section: Related Workmentioning

confidence: 99%

Low-Latency and Energy-Efficient BBU Placement and VPON Formation in Virtualized Cloud-Fog RAN

Tinini

Batista

Figueiredo

et al. 2019

J. Opt. Commun. Netw.

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Cloud Radio Access Networks (CRAN) allow to reduce power consumption in future 5G networks by decoupling BaseBand Units (BBU) from cell sites and centralizing the baseband processing from Remote Radio-Heads (RRH) in BBUs pools in a cloud. Although this centralization can enable power savings, it imposes much higher traffic on the optical transport network used to connect RRHs to the BBU pool, i.e., the fronthaul. In this paper we propose a hybrid Cloud-Fog RAN (CF-RAN) architecture that resorts to fog computing and to Network Functions Virtualization (NFV) to replicate the processing capacity of CRAN in local fog nodes closer to the RRHs that can be activated on demand to process surplus fronthaul/cloud traffic. We devise an ILP formulation and graph-based heuristics to decide when to activate fog nodes and how to dimension wavelengths on a Timeand-Wavelength Division Multiplexing Passive Optical Network (TWDM-PON) to support the fronthaul. Our results show that our architecture can consume up to 96% less energy than a traditional Distributed RAN (DRAN), providing a maximum transmission latency of about 20µs between RRHs and BBUs even in large traffic scenarios. Moreover, we demonstrate that our graph-based heuristics can achieve same optimal solutions of the ILP formulation but with a reduction of 99.86% in the execution time.

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Section: Related Workmentioning

confidence: 99%

Low-Latency and Energy-Efficient BBU Placement and VPON Formation in Virtualized Cloud-Fog RAN

Tinini

Batista

Figueiredo

et al. 2019

J. Opt. Commun. Netw.

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“…This delay is heavily dependent on the resource allocation mechanism implemented in the network. Previous studies have investigated the implementation of appropriate resource allocation mechanisms to meet the 5G delay requirements when using TDM-based PON [26] and also demonstrated the effectiveness of using TWDM PON as 5G x-haul [27].…”

Section: Evaluations Of the Optimal Solutionsmentioning

confidence: 99%

Optical Transport Network Design for 5G Fixed Wireless Access

Ranaweera

Monti

Skubic

et al. 2019

J. Lightwave Technol.

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The fifth generation of mobile technology, 5G is anticipated to be a significant leap in the evolution of mobile communication. 5G will be designed to attain 1000 times higher data volumes, 10 times lower latency, and 100 times more connected devices than its predecessor, 4G. Due to 5Gs ability to sustain high bandwidth per unit area, 5G is considered to be a cost-efficient solution to provide Fixed Wireless Access (FWA) to households on a large scale. FWA is seen as an attractive alternative for fixed broadband access in scenarios where last mile access based on wired technologies is not economically viable. Whilst approaches for enhancing user experience in a 5G FWA environment are investigated in the research community, the problem of providing cost-effective high capacity transport for FWA deployments still remains a major challenge. This is particularly challenging due to diverse transport network architectures and requirements imposed by different 5G deployment models. This paper addresses this problem by formulating a generalized joint-optimization framework to simultaneously plan wireless access and optical transport for 5G FWA networks in order to minimize the deployment cost whilst meeting various network requirements. We demonstrate the applicability of the proposed framework by applying it to a real scenario with a range of deployment options and where different types of optical x-haul solutions are considered. The results provide a cornerstone for deployment strategies that will be imperative for realizing a future-proof and cost-effective broadband access network.

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“…Likewise, the virtualized scheme presents a number of advantages such as low handover delay, excessive handover reduction, and better network reliability. This results in cost saving, celledge user throughput improvement, and enhanced mobility management [32,36,37]. The associated multiple wavelengths, as well as potential for wavelength tenability, give TWDM-PON unprecedented means of improving the network functionalities compared with the basic TDM-PONs [36,37].…”

Section: Twdm-pon Applicationmentioning

confidence: 99%

“…This results in cost saving, celledge user throughput improvement, and enhanced mobility management [32,36,37]. The associated multiple wavelengths, as well as potential for wavelength tenability, give TWDM-PON unprecedented means of improving the network functionalities compared with the basic TDM-PONs [36,37]. Likewise, orthogonal frequency-division multiplexed PON (OFDM-PON) is another promising PON solution.…”

Section: Twdm-pon Applicationmentioning

confidence: 99%

Enabling Optical Wired and Wireless Technologies for 5G and Beyond Networks

Alimi¹,

Tavares²,

Pinho³

et al. 2019

Telecommunication Systems - Principles and Applications of Wireless-Optical Technologies

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The emerging fifth-generation mobile communications are envisaged to support massive number of deployment scenarios based on the respective use case requirements. The requirements can be efficiently attended with ultradense small-cell cloud radio access network (C-RAN) approach. However, the C-RAN architecture imposes stringent requirements on the transport networks. This book chapter presents high-capacity and low-latency optical wired and wireless networking solutions that are capable of attending to the network demands. Meanwhile, with optical communication evolutions, there has been advent of enhanced photonic integrated circuits (PICs). The PICs are capable of offering advantages such as lowpower consumption, high-mechanical stability, low footprint, small dimension, enhanced functionalities, and ease of complex system architectures. Consequently, we exploit the PICs capabilities in designing and developing the physical layer architecture of the second standard of the next-generation passive optical network (NG-PON2) system. Apart from being capable of alleviating the associated losses of the transceiver, the proposed architectures aid in increasing the system power budget. Moreover, its implementation can significantly help in reducing the opticalelectrical-optical conversions issue and the required number of optical connections, which are part of the main problems being faced in the miniaturization of network elements. Additionally, we present simulation results for the model validation.Keywords: 5G, backhaul, centralized unit (CU), common public radio interface (CPRI), distributed unit (DU), fiber to the X (FTTX), fronthaul, functional split, optical wireless communication (OWC), passive optical network (PON), photonic integrated circuits (PICs), radio access network (RAN), radio over fiber (RoF) 1 mobile devices and applications in the networks. This is in an effort to enhance the user experience in delivering enhanced mobile broadband (eMBB) services and providing ultra-reliable low-latency communication (uRLLC) for critical communication and control services. In theory, IoT comprises universal existence of a collection of things like mobile PCs, tablets, smartphones, actuators, sensors, wireless routers, as well as radio-frequency identification (RFID) tags. It is remarkable that these devices are capable of cooperating not only with each other but also with their neighbors. By this approach, they are able to achieve common network goals by means of unique addressing scheme [1,2]. Furthermore, it has been predicted that massive number of mobile devices on which various bandwidth-intensive applications and services will be operating and will be Internet connected [3]. In actual fact, there is a tremendous demand for effective systems that are capable of delivering various services in a cost-effective manner while meeting the essential network demands. Consequently, in an effort to accomplish the next-generation mobile network technical demands, there have been intensive researches on viable solutions th...

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Handover Reduction in Virtualized Cloud Radio Access Networks Using TWDM-PON Fronthaul

Cited by 32 publications

References 16 publications

Low-Latency and Energy-Efficient BBU Placement and VPON Formation in Virtualized Cloud-Fog RAN

Low-Latency and Energy-Efficient BBU Placement and VPON Formation in Virtualized Cloud-Fog RAN

Optical Transport Network Design for 5G Fixed Wireless Access

Enabling Optical Wired and Wireless Technologies for 5G and Beyond Networks

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