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Special Issues
Trends, Issues and Challenges toward 5G and beyond
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Trends, Issues and Challenges toward 5G and beyond

A special issue of Journal of Sensor and Actuator Networks (ISSN 2224-2708). This special issue belongs to the section "Communications and Networking".

Deadline for manuscript submissions: closed (31 July 2019) | Viewed by 30110

Special Issue Editor

Prof. Dr. Koichi Asatani

E-Mail Website
Guest Editor
College of Electronic Information and Optical Engineering, Nankai University, No.94 Weijin Road, Nankai District, Tianjin, 300071 China
Graduate School of Electrical and Electronic Engineering, Kogakuin University, 1-24-2 Nishishinjuku, Shinjuku, Tokyo, 163-8677 Japan
Interests: IoT; 5G; FTTH; NGN; future networks; QoS

Special Issue Information

Dear Colleagues,

In the last decade of 20th century, information and communication technologies (ICT) growth was primarily driven by mobile technologies. New mobile generations appeared approximately every 10 years since the first 1G systems (analog) were introduced in 1982. The first 2G systems (first digital) were commercially deployed in 1992, and the 3G systems appeared in 2001. 4G systems were first standardized in 2012. Now, the 5G system is focused and is expected to be more than new access technology. It may mean a new wireless access technology, new core network technology and may support very wide applications, including IoT, such as smart cars, smart cities, in additions to the enhancement of mobile wireless communications.

The Internet has driven ICT growth and has been applied to man-to-man, man-to-machine and machine-to-machine communications. IoT is based on machine-to-machine communications and will be a driver for next generation applications. As such, 5G and IoT are two of vital pivots in the future ICT platform and applications.  The goal of 5G is very challenging.

This Special Issue solicits original work presented as research contributions, tutorials or technical papers on development related to 5G networking, and applications in 5G. Manuscripts should describe completed and unpublished work not currently under review elsewhere.

Prof. Dr. Koichi Asatani
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Sensor and Actuator Networks is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Architectures for 5G communications
  • Software Defined Networking and Network Function Virtualization
  • Network slicing and softwarization
  • IoT and 5G networking
  • Context and location-aware wireless services and applications
  • User-centric networks and adaptive services
  • End-to-End Quality of Experience support and evaluation under 5G environments
  • Security and privacy in 5G communications
  • Multimedia delivery over 5G networks
  • Big data under 5G environment
  • AI in 5G network management and control
  • Applications in 5G communications
  • End-to-End testbeds and trials
  • Adaptive content distribution in on-demand services
  • Wireless body area networks and e-health services under 5G environments
  • Smart cities and 5G
  • Smart transportation systems
  • Dynamic sensor networks for urban applications
  • Emergency and security systems
  • Regulations, standards, and spectrum management
  • Licensed/unlicensed spectrum access schemes
  • Architecture for new backhaul schemes

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Published Papers (4 papers)

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Research

16 pages, 2501 KiB  
Article
An Availability-Enhanced Service Function Chain Placement Scheme in Network Function Virtualization
by Yansen Xu and Ved P. Kafle
J. Sens. Actuator Netw. 2019, 8(2), 34; https://doi.org/10.3390/jsan8020034 - 14 Jun 2019
Cited by 12 | Viewed by 7570
Abstract
A service function chain (SFC) is an ordered virtual network function (VNF) chain for processing traffic flows to deliver end-to-end network services in a virtual networking environment. A challenging problem for an SFC in this context is to determine where to deploy VNFs [...] Read more.
A service function chain (SFC) is an ordered virtual network function (VNF) chain for processing traffic flows to deliver end-to-end network services in a virtual networking environment. A challenging problem for an SFC in this context is to determine where to deploy VNFs and how to route traffic between VNFs of an SFC on a substrate network. In this paper, we formulate an SFC placement problem as an integer linear programing (ILP) model, and propose an availability-enhanced VNF placing scheme based on the layered graphs approach. To improve the availability of SFC deployment, our scheme distributes VNFs of an SFC to multiple substrate nodes to avoid a single point of failure. We conduct numerical analysis and computer simulation to validate the feasibility of our SFC scheme. The results show that the proposed scheme outperforms well in different network scenarios in terms of end-to-end delay of the SFC and computation time cost. Full article
(This article belongs to the Special Issue Trends, Issues and Challenges toward 5G and beyond)
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16 pages, 1092 KiB  
Article
SDN-Based Routing for Backhauling in Ultra-Dense Networks
by Dania Marabissi, Romano Fantacci and Linda Simoncini
J. Sens. Actuator Netw. 2019, 8(2), 23; https://doi.org/10.3390/jsan8020023 - 23 Apr 2019
Cited by 6 | Viewed by 6534
Abstract
Ultra-Dense Network (UDN) deployment is considered a key element to achieve the requested capacity in future fifth-generation (5G) mobile networks. Backhaul networks in UDNs are formed by heterogeneous links with multi-hop connections and must handle massive traffic. Backhauling in future 5G networks may [...] Read more.
Ultra-Dense Network (UDN) deployment is considered a key element to achieve the requested capacity in future fifth-generation (5G) mobile networks. Backhaul networks in UDNs are formed by heterogeneous links with multi-hop connections and must handle massive traffic. Backhauling in future 5G networks may represent the capacity bottleneck. Therefore, there is the need for efficient and flexible routing schemes able to handle the dynamism of the traffic load in capacity-limited networks. Toward this goal, the emerging Software-Defined Network (SDN) paradigm provides an efficient solution, transferring the routing operation from the data plane switches to a central controller, thus achieving more flexibility, efficiency, and faster convergence time in comparison to conventional networks. This paper proposes and investigates an SDN-approach for an efficient routing in a capacity-limited backhaul network that carries data and control traffic of a heterogeneous UDN. The routing algorithm is centralized in the SDN controller and two different types of traffic flow are considered: data and control plane coordination traffic. The goal is to reduce or even to avoid the amount of traffic that the backhaul network is not able to support, distributing in a fair way the eventual lack of bandwidth among different access points. Simulation results show that with the considered approach the performance significantly improves, especially when there is an excess of traffic load in the network. Moreover, thanks to the SDN-based design, the network can reconfigure the traffic routing depending on the changing conditions. Full article
(This article belongs to the Special Issue Trends, Issues and Challenges toward 5G and beyond)
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15 pages, 8459 KiB  
Article
Transmission Performance of an OFDM-Based Higher-Order Modulation Scheme in Multipath Fading Channels
by Hiroyuki Otsuka, Ruxiao Tian and Koki Senda
J. Sens. Actuator Netw. 2019, 8(2), 19; https://doi.org/10.3390/jsan8020019 - 27 Mar 2019
Cited by 26 | Viewed by 8111
Abstract
Fifth-generation (5G) mobile systems are a necessary step toward successfully achieving further increases in data rates. As the use of higher-order quadrature amplitude modulation (QAM) is expected to increase data rates within a limited bandwidth, we propose a method for orthogonal frequency division [...] Read more.
Fifth-generation (5G) mobile systems are a necessary step toward successfully achieving further increases in data rates. As the use of higher-order quadrature amplitude modulation (QAM) is expected to increase data rates within a limited bandwidth, we propose a method for orthogonal frequency division multiplexing (OFDM)-based 1024- and 4096-QAM transmission with soft-decision Viterbi decoding for use in 5G mobile systems. Through evaluation of the transmission performance of the proposed method over multipath fading channels using link-level simulations, we determine the bit error rate (BER) performance of OFDM-based 1024- and 4096-QAM as a function of coding rate under two multipath fading channel models: extended pedestrian A (EPA) and extended vehicular A (EVA). We also demonstrate the influence of phase error on OFDM-based 1024- and 4096-QAM and clarify the relationship between phase error and the signal-to-noise ratio (SNR) penalty required to achieve a BER of 1 × 10−2. This work provides an effective solution for introducing higher-order modulation schemes in 5G and beyond. Full article
(This article belongs to the Special Issue Trends, Issues and Challenges toward 5G and beyond)
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20 pages, 2948 KiB  
Article
Context-Based Dynamic Meshed Backhaul Construction for 5G Heterogeneous Networks
by Gia Khanh Tran, Ricardo Santos, Hiroaki Ogawa, Makoto Nakamura, Kei Sakaguchi and Andreas Kassler
J. Sens. Actuator Netw. 2018, 7(4), 43; https://doi.org/10.3390/jsan7040043 - 2 Oct 2018
Cited by 14 | Viewed by 7246
Abstract
Five-G heterogeneous network overlaid by millimeter-wave (mmWave) access employs mmWave meshed backhauling as a promising cost-efficient backhaul architecture. Due to the nature of mobile traffic distribution in practice which is both time-variant and spatially non-uniform, dynamic construction of mmWave meshed backhaul is a [...] Read more.
Five-G heterogeneous network overlaid by millimeter-wave (mmWave) access employs mmWave meshed backhauling as a promising cost-efficient backhaul architecture. Due to the nature of mobile traffic distribution in practice which is both time-variant and spatially non-uniform, dynamic construction of mmWave meshed backhaul is a prerequisite to support the varying traffic distribution. Focusing on such scenario of outdoor dynamic crowd (ODC), this paper proposes a novel method to control mmWave meshed backhaul for efficient operation of mmWave overlay 5G HetNet through Software-Defined Network (SDN) technology. Our algorithm is featured by two functionalities, i.e., backhauling route multiplexing for overloaded mmWave small cell base stations (SC-BSs) and mmWave SC-BSs’ ON/OFF status switching for underloaded spot. In this paper, the effectiveness of the proposed meshed network is confirmed by both numerical analyses and experimental results. Simulations are conducted over a practical user distribution modeled from measured data in realistic environments. Numerical results show that the proposed algorithm can cope with the locally intensive traffic and reduce energy consumption. Furthermore, a WiGig (Wireless Gigabit Alliance certified) device based testbed is developed for Proof-of-Concept (PoC) and preliminary measurement results confirm the proposed dynamic formation of the meshed network’s efficiency. Full article
(This article belongs to the Special Issue Trends, Issues and Challenges toward 5G and beyond)
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