Two-Dimensional Pilot Design for Non-Orthogonal Multiple Access in Multicarrier System

  • Chen Y.

As being adopted as an important candidate Multiple Access (MA) scheme of future wireless communications, Non-Orthogonal Multiple Access (NOMA) recently attracts more and more attention. In this paper, we propose a solution of two-dimensional superimposed pilot design for NOMA. The proposed scheme exploits Walsh Hadamard matrix and its modifications to ...

Designing Optimal Heterogeneous Networks

  • Batteram H.
  • Chen X.
  • Louwdyk F.
  • Mukhopadhyay A.
  • Sharma A.
  • Zhao Z.

Wireless operators worldwide are struggling with network congestion following explosion of mobile data traffic over the last several years. In many countries, spectrum addition is not an option. Improvement in spectral efficiency is not keeping up with traffic growth. Thus the only option to add network capacity is to re-use ...

On the Performance of Multi-tier Heterogeneous Networks under LoS and NLoS Transmissions

  • Jiaqi Wang
  • Lopez-Perez D.
  • Ming Ding
  • Xiaoli Chu

Heterogeneous networks (HetNets) with a multi-tier structure have been considered as a promising method to provide high quality of service to mobile users. The dense deployment of small-cell base stations (BSs) implies short distances between BSs and users. It is therefore likely that users will see line-of-sight (LoS) links from ...

Resource Scheduling for Mixed Traffic Types with Scalable TTI in Dynamic TDD

  • Baracca P.
  • Galati Giordano L.
  • Liao Q.
  • Lopez-Perez D.

The idea behind this paper is to analyse the performance benefits of a user-centric scheduling approach, exploiting the combination of the promising advantages of a flexible duration of the transmission time interval (TTI) available in the fifth generation (5G) and the dynamic Time Division Duplex (TDD) where downlink (DL) and ...

Performance Comparison and Optimization of ICN Prototypes

  • Ali Safari Kathuoni
  • Gallo M.
  • Luca Venturini
  • Marco Mellia
  • Perino D.

Information Centric Networking paradigm is now a solid proposal to replace and update the original Internet design. While the research community is still working on technical improvement, the technology has reached a stage that allows the design, testing and deployment of ICN specific applications. To this goal, key is the ...

Extracting Location Information Content from RF Fingerprints

  • Claussen H.
  • Dashti M.

Location Fingerprinting (LF) is a promising localization technique that enables many commercial and emergency location-based services (LBS). Significant efforts have been invested in enhancing LF using advanced machine learning methods. Most of these techniques require a huge amount of geo-tagged training data to achieve significant improvement in accuracy. This increases ...

Transient analysis of Virtual Dictionary Extension compression method

  • Farkas L.
  • Finta I.
  • Sergyán S.
  • Szénási Sándor

The application of lossless data compression meth- ods may significantly decrease the required storage space or throughput. The quality of the compression ratio is influenced by several factors, like the available space and processing resources and the statistical characteristic of the data to be compressed. In this contribution we will ...

Memory-rate trade-off for caching and delivery of correlated sources

  • Erkip E.
  • Hassanzadeh P.
  • Llorca J.
  • Tulino A.

In cache-aided networks, due to the multicast nature of wireless signals, coded multicast delivery results in significant load reductions that are proportional to the aggregate cache size. State of the art caching schemes exploit exact content reuse across the network, which, due to the personalized nature of the content consumed ...

A Unified Coding Framework for Distributed Computing with Straggling Servers

  • Avestimehr A.
  • Li S.
  • Maddahali M.

We propose a unified framework for distributed computing incorporating recent coding ideas in [1] and [2] to speed up a distributed matrix multiplication application. We utilize MDS codes to create redundant computations to deal with straggling server nodes, and also apply coded multicasting during the data shuffling to reduce the ...

Architecture Approaches for 5G Millimetre Wave Access Assisted by 5G Low-Band using Multi-Connectivity

  • Ambrosy A.
  • Aziz D.
  • Bakker H.
  • Gebert J.
  • Halbauer H.

One of the key technology components envisioned for the delivery of extreme mobile broad band in 5G networks is the transmission using millimetre waves. However, using this technology, it is challenging to provide reliable and seamless data transmission to the users. Due to the propagation characteristics of millimetre waves, high ...

Delay-Tolerant Autonomous Transmissions for Short Packet Communications

  • Balachandran K.
  • Kang J.
  • Karakayali K.
  • Rege K.

The cellular network evolution has generally focused on improving system and edge user throughput while reducing latency. Recently, a new class of service involving the communication of short packets has emerged wherein scale, coverage, reliability, and energy efficiency has greater importance than the rate or latency at which the information ...

The impact of channel knowledge on energy-efficient uplink communication

  • Biral A.
  • Huang H.
  • Zanella A.
  • Zorzi M.

In this work we address the problem of optimal resource allocation in the uplink of a wireless cellular network with Rayleigh fading channels, where the aim is to minimize the average total energy, given by the sum of the transmit energy and an overhead circuit energy, spent for packet delivery. ...

Fronthaul for 5G: low bit-rate design enabling joint transmission and reception

  • Boviz D.
  • El Mghazli Y.

Centralization of base-band processing in mobile networks in a flexible manner is a key element of 5G architecture and aims to achieve significant performance and efficiency gains cite{rostcloud}. The increase of transmission bandwidth and of the number of antennas requires a modification of Cloud Radio Access Network (C-RAN) architecture in ...

Dual-Band Multipath Cluster Analysis of Small-Cell Backhaul Channels in an Urban Street Environment

  • Haneda K.
  • Nguyen S.
  • Putkonen J.

Thanks to the large spectrum chunks available above 6-GHz bands, several centimeter-wave (cm-wave) and millimeter- wave (mm-wave) bands are being exploited for mobile communications to meet 5G high data speed and low latency requirements. The 5G standardization has been started with the channel modelling for the bands from 6 and ...

Frame Structure Design for Future Millimetre Wave Mobile Radio Access

  • Cassiau N.
  • Li Y.
  • Luo J.
  • Miao H.
  • Pajukoski K.
  • Qi Y.
  • Svensson T.
  • Vihriala J.
  • Zaidi A.

5th generation cellular systems will extend the operation to above 6 GHz to meet extreme data rate requirements. This sets new requirements for the air interface design. In this paper, we propose several frame structure solutions from the mmMAGIC project [1], which address the challenges of using higher carrier frequencies. ...

Reflection Environment Maps for Enhanced Reliability in 5G Self-Organizing Networks

  • Li Z.
  • Lunden P.
  • Prasad A.
  • Uusitalo M.

Enabling extreme mobile broadband data rates with improved reliability is a challenging requirement in 5G radio access networks. In order to achieve this, enhancements in currently defined self-organizing functions are essential. In this work, we consider the use of reflection environment maps (RefMaps) to improve reliability, coverage and data rates ...

Energy-Efficient Subcarrier Allocation and Power Control in Wireless Virtualization Networks

  • Kwang-Cheng Chen
  • Liqiang Zhao
  • Lopez-Perez D.
  • Yaoyuan Zhang

Optimization of joint subcarrier and power allocation is fundamental to implement orthogonal frequency division multiple access (OFDMA). While energy efficiency (EE) is a critical issue for OFDMA systems, the appropriate energy efficient design to enable emerging virtualization in wireless OFDMA networks remains open. In this paper, we focus on energy ...

Urgent! Please Lower Small Cell Antenna Heights in 5G

  • Lopez-Perez D.
  • Ming Ding

In this paper, we present a new and significant theoretical discovery. If the absolute height difference between base station (BS) antenna and user equipment (UE) antenna is larger than zero, then the network capacity performance in terms of the area spectral efficiency (ASE) will continuously decrease as the BS density ...

Modeling of Mobility-Aware RRC State Transition and Its Application on Energy-Constrained Signaling Reduction

  • Aziz D.
  • Liao Q.

For the coming 5th Generation, mobile devices are becoming more chatty due to the machine-type-communication and always-on applications. On the other hand, the densely deployed heterogeneous networks cause more frequent handovers. From the network's perspective, the increased amount of background traffic and handovers increase the signaling load due to frequent ...

Study on the Idle Mode Capability with LoS and NLoS Transmissions

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

In this paper, we study the impact of the base station (BS) idle mode capability (IMC) on the network performance in dense small cell networks (SCNs). Different from existing works, we consider a sophisticated path loss model incorporating both line-of-sight (LoS) and non-line-of-sight (NLoS) transmissions. Analytical results are obtained for ...