Coalitional Game for the Creation of Efficient Virtual Core Network Slices in 5G Mobile Systems

Many ongoing research activities relevant to 5G mobile systems concern the virtualization of the mobile core network, including the Evolved Packet Core (EPC) elements, aiming for system scalability, elasticity, flexibility, and cost-efficiency. Virtual EPC (vEPC)/5G Core will principally rely on some key technologies such as Network Function Virtualization (NFV), Software ...

Network Slicing & Softwarization: A Survey on Principles, Enabling Technologies & Solutions

Network slicing has been identified as the backbone of the rapidly evolving 5G technology. However, as its consolidation and standardization progress, there are no literatures that comprehensively discuss its key principles, enablers and research challenges. This paper elaborates network slicing from an end-to-end perspective detailing its historical heritage, principal concepts, ...

Correction Factor for Analysis of MIMO Wireless Networks With Highly Directional Beamforming

In this letter, we reconsider a popular simplified received signal power model with single stream beamforming employed by the transmitter and the receiver in the regime when the beams have high gain and narrow beamwidth. We define the correction factor as the ratio of the average actual received signal power ...

A Fast and Low-Loss Electromagnetically Tunable Optical Filter

Fast and simple optical filtering is a prerequisite for low-cost passive optical networking using multiple wavelengths to scale to higher capacity. We demonstrate a simple electromagnetically tuned optical filter capable of tuning across more than 700 GHz of optical spectrum in under 1 ms with low optical loss. We show ...

A Latency and Reliability Guaranteed Resource Allocation Scheme for LTE V2V Communication Systems

By leveraging the direct device-to-device (D2D) interaction, LTE Vehicle-to-Vehicle (V2V) communication becomes a promising solution to meet the stringent requirements of vehicular communication. In this paper, we propose to jointly optimize radio resource, power allocation, and modulation/coding schemes of the V2V communications, in order to guarantee the latency and reliability ...

Integrated Hybrid Wavelength-tunable III-V/Silicon transmitter based on ring-assisted Mach-Zehnder interferometer modulator

  • Brenot R.
  • De Valicourt G.
  • Dong P.
  • Eggleston M.
  • Kim K.
  • Lee S.
  • Zhu C.

We demonstrate a wavelength-tunable hybrid III-V/Si transmitter based on a Vernier laser with more than 30 nm tuning range and two microring modulators nested in a Mach-Zehnder interferometer. This transmitter circuit has versatile operating modes. It can be used for OOK generation based on low drive voltage push-pull ring modulators ...

An RNS-Based Forwarding Approach To Implement SFC

  • Hu Z.
  • Zhao M.

Because of the more and more diversified service, SFC needs to be dynamically and feasibly implemented. Thanks to NFV and SDN ideas, the new SFC architecture is defined to meet the requirements in the IETF. Based on the OpenFlow, the approach of the single flow table is used to implement ...

Typhoon: An SDN Enhanced Real-Time Big Data Streaming Framework

  • Chang H.
  • Cho J.
  • Lakshman T.
  • Mukherjee S.
  • Van Der Merwe J.

Current big data streaming frameworks focus mainly on the scalability of real-time stream data processing, and are not flexible, controllable, and programmable enough to accomodate dynamic streaming application needs. For example, current frameworks do not deal well with use cases like updating routing and computation logic, or enabling live debugging ...

Low-Profile Miniaturized Coaxial Cavity Resonators and Filters

  • Bulja S.
  • Dmitry Kozlov
  • Doumanis E.

A new class of coaxial cavity filters with low-profile is proposed. The additional benefits of the technology include: volume reduction, high performance, and superior spurious free-response. The proposed resonator consists of a cavity enclosure and three metallic conductors; an outer hollow cylinder, an inner hollow cylinder protruding the cavity from ...

Simple optoelectronic frequency-offset estimator for coherent optical OFDM

  • Corcoran B.
  • Jignesh J.
  • Lowery A.
  • Zhu C.

We propose a carrier frequency-offset estimator for optical OFDM systems using off-the-shelf optical components and simple digital processing as a replacement for the purely digital signal processing using the cyclostationarity property of optical OFDM signals with cyclic prefix. Simulations show the system accuracy of < 4% estimate error within the ...

Optimal Control of Storage Regeneration with Repair Codes

  • De Pellegrini F.
  • El-Azouzi R.
  • Hassani O.
  • Silva A.

High availability of containerized applications requires to perform robust storage of applications' state. Since basic replication techniques are extremely costly at scale, storage space requirements can be reduced by means of erasure and/or repairing codes. In this paper we address storage regeneration using repair codes, which is a robust distributed ...

Coverage and Capacity Impact of Mobility and Human Body Blocking at Millimeter Waves

  • Kaya A.
  • Viswanathan H.

We investigate the impact human body blocking on the performance of millimeter wave wireless systems in an urban hotspot scenario. The effects of human body blocking at higher frequency bands are expected to be more severe than at traditional cellular bands because of worse signal propagation through the human body. ...

System-Level Performance Evaluation for 5G mmWave Cellular Network

  • Gacanin H.
  • Jonathan Rodriguez
  • Kazi M. S. Huq
  • Shahid Mumtaz
  • Sherif A. Busari

Cellular networks with hyper-dense deployment of small cells have been identified as the performance-optimizing architecture for fifth-generation (5G) mobile systems. A thousandfold capacity increase is projected when such networks benefit from aggressive spatial multiplexing and huge bandwidth, realizable with massive antenna arrays and millimeter-wave (mmWave) spectrum, respectively. As a precursor ...

What is the Optimal Network Deployment for a Fixed Density of Antennas?

  • Guoqiang Mao
  • Lopez-Perez D.
  • Ming Ding
  • Xuefeng Yao
  • Zihuai Lin

In this paper, we answer a fundamental question: when the total number of antennas per square kilometer is fixed, what is the optimal network deployment? A denser network with a less number of antennas per base station (BS) or the opposite case. To evaluate network performance, we consider a practical ...

Robust Regularised Channel Inversion for Massive MIMO Unlicensed

  • Ding M.
  • Garcia Rodriguez A.
  • Geraci G.
  • Qiang H.
  • Yuan J.

In this paper, we propose a robust regularised channel inversion (RRCI) approach to improve the downlink performance of massive multiple-input multiple-output unlicensed (mMIMO-U) under imperfect channel state information (CSI). We first derive the optimal parameter $alpha$ for regularised channel inversion (RCI). We then compare the beamforming performance among our proposed ...

LTE-M Evolution Towards 5G Massive MTC

  • Bhatoolaul D.
  • Ghosh A.
  • Mangalvedhe N.
  • Ratasuk R.

Massive machine type communication (mMTC) has been identified as an important use case for 5G New Radio wireless technology. In 4G Long-Term Evolution (LTE), 3GPP has previously introduced LTE-M for low-power, wide-area networks supporting the Internet of Things. Rel-13 specifications for LTE-M were completed in 2016. Rel-14 enhancements were completed ...

A Radio Resource-Efficient Paging Method in High Frequency 5G Networks

  • Awada A.
  • Michalopoulos D.

Conventional paging methods are associated with increased radio resource overhead when deployed in high frequency networks. This is due to the beam sweeping involved, which, particularly for large number of beams, renders conventional paging inefficient. This work provides an assessment in terms of radio resource usage efficiency of an alternative ...

Massive MIMO Unlicensed for High-Performance Indoor Networks

  • Claussen H.
  • Ding M.
  • Garcia-Rodriguez A.
  • Geraci G.
  • Giordano L.
  • Lopez-Perez D.

We propose massive MIMO unlicensed (mMIMO-U) as a high-capacity solution for future indoor wireless networks operating in the unlicensed spectrum. Building upon massive MIMO (mMIMO), mMIMO-U incorporates additional key features, such as the capability of placing accurate radiation nulls towards coexisting nodes during the channel access and data transmission phases. ...

Machine-Learning Identification of Airborne UAV-UEs Based on LTE Radio Measurements

  • Amorim R.
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Wigard J.

The overall cellular network performance can be optimized for both ground and aerial users, if different treatment is given for the two user classes. Airborne UAVs experience different radio conditions that terrestrial users due to clearance in the radio path, which leads to strong desired signal reception, but at the ...

Multigroup Multicast Precoding in Massive MIMO

Optimal physical layer multicasting (PLM) is an NP-hard problem that for simplicity has been studied under idealistic assumptions, e.g., availability of perfect channel state information (CSI), both at the base station (BS) and at the user terminals (UTs). With the advent of massive multiple-input-multiple-output (MIMO), PLM has become more challenging, ...