Abstract—Polar code, the first capacity achieving code, has ranked in the key FEC candidates for 5G wireless. Despite of its remarkable properties of absence of error floor and fine-grained rate-adaptation, low parallel-ism and finite length performance have limited its applications. This tutorial will present cutting-edge techniques of making polar code a good trade-off between the overall communication performance and a number of implementation metrics such as complexity and energy efficiency. In order to match the two main research categories of polar codes, the proposed tutorial will be divided into two parts: Part I: Principles and Methodologies of Polar Codes given by Professor Kai Niu; Part II: Efficient Implementations of Polar Codes given by Professor Chuan Zhang. Indicated by its title, this proposed tutorial of “Polar Code for 5G Wireless: Algorithms and Implementations” commits itself to introducing the emerging techniques and recent progress mentioned above. We mean to bring a synthesized source and wide view of recent progress and existing challenges in this particular but very important research area of wireless communication.
History of capacity-approaching channel codes.
Basic concept of channel polarization: Explain the channel polarization phenomenon (good and bad channel generation) from the two channel polarization example. Further extend to more channels polarization, such as 64-, 256-, and 1024-channel polarization and show the evolution of channel polarization.
Asymptotic analysis of polar codes: Explain the asymptotic behavior of polarized channels and capacity-achieving property of polar codes; summarize the breakthrough of polarization ideas in coding theory.
Polar coding principle:
Generic structure of polar encoder.
Coding of systematic polar codes.
Hybrid or concatenated structure of polar encoder.
Basic construction method: Introduce the iterative calculation of Bhattacharyya parameters under the BEC channels.
Enhanced construction methods: Explain basic ideas of some enhanced construction methods and compare these algorithms advantages and disadvantages.
State the idea of SCS decoding and compare it with SCL algorithm.
CRC-aided decoding algorithm: Describe the decoding process of CA-SCL/CA-SCS and show the performance gains over the WCDMA/LTE turbo codes or WiMax LDPC codes.
Belief propagation (BP) decoding: Express the basic idea of BP decoding and analyze the corresponding performance and complexity.
A polar coded HARQ:
Rate compatible schemes of polar codes.
Polar coded incremental redundancy (IR) HARQ.
Polar coded chase combining (CC) HARQ.
Implementations of conventional SC polar decoders: The existing main implementation techniques for conventional SC polar decoders will be introduced. The techniques include tree architecture, pre-computation, semi-parallelization, interleaving, and folding.
Implementations of simplified SC (SSC) and fast SC (FSC) polar decoders: The basic concepts of SSC and FSC polar decoding will be introduced first. The corresponding hardware implementations are given also.
Implementations of SC list (SCL) and SC stack (SCS) polar decoders: Implementations of both SCL and SCS polar decoders are introduced.
Implementations of polar encoders and partial-sum blocks: This part will first introduce the data-flow graph (DFG) analysis of both polar encoders and partial-sum blocks. Based on the DFG analysis, the corresponding folded hardware implementations are given.
Implementations of BP polar decoders: Efficient early termination schemes will be given first. Then the hardware implementations of BP polar decoders will be given.
Implementations of soft cancelation (SCAN) decoder and concatenation decoders: One variant of BP polar decoder, SCAN decoder will be introduced. For performance issue, concatenation polar decoders with LDPC code or BCH code are introduced also.
Stochastic implementations of polar decoders: For better hardware efficiency, fault tolerance, and computation accuracy, the stochastic implementation approach for polar decoder is discussed.
Software implementations of polar decoders: In order to implement polar decoding with general purposed CPUs, the software implementation approaches of polar decoders are discussed.
Principles and Methodologies of Polar Codes
Background of Polar Codes
Polar Coding and Construction
Polar Decoding Algorithms
Practical Applications of Polar Codes
Summary of Part I
Efficient Implementations of Polar Codes
Implementations of Successive Cancellation (SC) Polar Decoders
Implementations of Belief Propagation (BP) Polar Decoders
Heterogeneous of Implementations of Polar Decoders
Summary of Part II
Primary Audience This tutorial is it aimed at audience who are familiar with 5G wireless and interested in the emerging and promising polar codes. It is expected that the great portion of attending experts will be interested.
Novelty This tutorial will greatly help the prospective VTC2016-Spring participates understand basic ideas of polar codes and its possible applications for 5G. Cutting-edge research progresses in this area will be introduced. Having such a tutorial focusing on polar codes for 5G wireless will expand VTC’s own academic and industrial influence and strengthen its pioneering position for vehicular technology. This tutorial will for sure initialize further progress in this specific research area.
Biography Dr. Kai Niu received a B.S. in information engineering and a Ph.D in signal and information processing from Beijing University of Posts and Telecommunications (BUPT) in 1998 and 2003 respectively. Then he joined the Information Theory and Technique Center, BUPT. Currently he is a professor in School of Information and Communication Engineering, BUPT. He is a senior member of Chinese Institute of Electronics. Professor Niu’s research areas of interests include: polar code, iterative signal processing, MIMO signal processing. Published 26 SCI papers, 200+ EI papers, holding 36 China patents in the fields of 3G/LTE, MIMO detection, iterative decoding.
Dr. Chuan Zhang is now an associate professor of National Mobile Communications Re-search Laboratory, School of Information Science and Engineering, Southeast University, Nanjing, China. He received B.E. degree in microelectronics and M.E. degree in VLSI design from Nanjing University, Nanjing, China, in 2006 and 2009, respectively. He received both M.S.E.E. degree and Ph.D. degree in Department of Electrical and Computer Engineering, University of Minnesota, Twin Cities (UMN), USA, in 2012. His current research interests include 5G communication system designs, low-power high-speed VLSI design, specifically VLSI design for digital signal processing, digital communications (with emphasis on error-control coding and cryptography), quantum information theory, and bio-chemical synthesis implementation. As the first author, Dr. Zhang has published papers in journals such as IEEE Transactions on Circuits and Systems I and II, IEEE Trans-actions on Signal Processing, and refereed proceedings such as ISCAS, ICC, Asilomar, APCCAS, SOCC, and so on.
Abstract—Emerging online social networks significantly change the way of content distribution and information dissemination, while the traffic of social networks has dominated Internet traffic in the mobile communication networks. Therefore, it is vital to design future wireless networks and 5G mobile communications by properly leveraging the properties of social networks. In light of the interplay between social network and technological networks, we shall further look into the fundamentals of network science and subsequent social network analysis, and the abstract ways to utilize the nature of social networks to design wireless networks, while supplying with successful engineering examples. Various aspects from analysis and system applications, particularly IoT/CPS and cellular networks will be presented in this tutorial. It shall open a new scenario and subsequently paradigm shift in the technology development of wireless networks and wireless communications to better meet the expectation from users.
Tutorial Objectives Emerging network science, further generalization of social networks, suggests a new paradigm to design information-centric wireless networks, self-organizing networks, and vehicular networks (including wireless robotics). In this tutorial, in addition to traditional views on mobile social networks, we shall further look into the fundamentals of social network analysis (and network science in more general view), and its abstract ways to design wireless networks, supplying with successful engineering examples. Various aspects from analysis and system applications will be presented in this tutorial. It shall open a new scenario and subsequently paradigm shift in the technology development of wireless networks and wireless communications to better meet the expectation from users. This tutorial particularly helps the vision and techniques for VTC attendees to better design wireless communications and networks of user interests.
1. Introduction to Social Networks and Their Generalization
2. Socially Aware Mobile Networks and D2D Communication
3. Random Graphs, Random Networks, and Statistical Physics
4. Random Graphs and Stochastic Geometry for Cognitive Radio Networks and Energy-Harvesting Networks
5. Social Network Analysis via Random Graphs
6. Social Network Analysis on Epidemics and Applications to Network Security and Networking for Internet of Things
7. Socially Enabled Routing for Ad Hoc Networks
8. Socially Enabled Resource Allocation and Caching for 5G Mobile Communications and Network Economy
9. Networked Data Analytics Toward Self-Organizing Wireless Networks, to Integrate Networking and Context-Aware Computing
Primary Audience Researchers, graduate students, and practice engineers in wireless networks and communication systems, and professionals in wireless industry interested in online social networks and applications over wireless networks.
Novelty Social networks are important state-of-the-art technology and have deep insights in fundamentals that wireless communication and networking engineers are not familiar with. This tutorial first time tailors proper knowledge for engineers and systematically summarizes research to design wireless networks as another capstone in 5G mobile communications and Internet of Things.
Biography Kwang-Cheng (K.C.) Chen received the B.S. from the National Taiwan University in 1983, and the M.S. and Ph.D from the University of Maryland, College Park, United States, in 1987 and 1989, all in electrical engineering. From 1987 to 1998, Dr. Chen worked with SSE, COMSAT, IBM Thomas J. Watson Research Center, and National Tsing Hua University, in mobile communications and networks. Since 1998, Dr. Chen has been with National Taiwan University, Taipei, Taiwan, ROC, and is the Distinguished Professor in the College of Electrical Engineering and Computer Science, National Taiwan University. He is visiting the Research Laboratory of Electronics at the Massachusetts Institute of Technology, 2012-2013 and 2015-2016. Dr. Chen was with the STAG, Executive Yuan, to engineering Taiwan’s telecommunication deregulation and to plan nation’s regulator (today’s NCC) in 1990’s. He founded a wireless IC design company in 2001, which was acquired by MediaTek Inc. in 2004. He has been actively involving in the organization of various IEEE conferences as General/TPC chair/co-chair, serving editorships with a few IEEE journals, and various IEEE volunteer services with IEEE Fellow Committee, IEEE VTS Fellow Evaluation Committee, IEEE VTS Distinguished Lecturer, etc. Most recently, he founds and chairs the Technical Committee on Social Networks in the IEEE Communications Society. Dr. Chen also has contributed essential technology to various international standards like IEEE 802 wireless LANs, Bluetooth, LTE (4G wireless communications) and LTE-A. He has authored and co-authored 250 IEEE papers and more than 20 granted US patents. He co-edited (with R. DeMarca) the book Mobile WiMAX published by Wiley in 2008, and authored the book Principles of Communications published by River in 2009, and co-authored (with R. Prasad) another book Cognitive Radio Networks published by Wiley in 2009. Dr. Chen is an IEEE Fellow and has received a number of awards including very recent 2011 IEEE COMSOC WTC Recognition Award, 2014 IEEE Jack Neubauer Memorial Award, 2014 IEEE COMSOC AP Outstanding Paper Award. Dr. Chen’s current research interests include wireless communications, network science, and data science.
T3: TV White Spaces: A Detailed Summary, Implementation Specifics, and Performance Assessment by Oliver Holland (King's College London), Przemysław Pawełczak (TU Delft), Yue Gao (Queen Mary Univ) has been cancelled
Abstract—The dramatic increase of mobile traffic due to the widespread use of smart devices, further combined with the complexity of future wireless infrastructures in supporting more diverse applications through the use of spatially distributed radio resources, directly necessitates intensive research efforts on the 5th Generation (5G) wireless networks worldwide.
In supporting the stringent requirements of 5G particularly the anticipated 1,000 times increase of the network capacity, advanced physical and network layer techniques are essential to enable new air interface, spatial transmission schemes with extremely high utilization rates of 3-D distributed radio resources, tight collaboration among heterogeneous networks, and extremely cost-effective network operations. It is expected that the future 5G network is not only the evolution of the current 4G system, but a dramatic revolution and convergence of the broad area of information and communication technologies (ICT) which enables highly efficient, ultra-reliable, secure and delay critical services to interconnect everyone and everything.
This tutorial aims analyzing key technical aspects of the physical and network layers of 5G networks, and sharing insights on 5G requirements, enabling technologies and research opportunities. Advanced physical and network layer techniques for 5G including 3-D spatial transmission schemes, heterogeneous networks, and effective 5G operations will be presented. The tutorial will be focused on massive MIMO, distributed antenna, physical layer waveform design, millimeter wave, and software defined networking in 5G. Our target audience encompasses researchers from academia, industry and standard development bodies.
Tutorial Objectives The objective of this tutorial is to analyze the key technical aspects of the 5G physical and network layers, and share insights on the requirements, challenges, and enabling technologies including massive MIMO, millimeter wave, distributed antenna systems and software defined networking (SDN) technologies. The tutorial will have three parts where each of them will be covered approximately in about 1 hour.
In the second part, key physical and network layer technologies for 5G will be presented. These include the essential transmission and networking technologies (i.e., distributed antenna systems, massive MIMO and SDN), new waveform designs, channel characterization and network security. In this respect, special emphasis will be given on some of the fundamental aspects of these technologies such as the hardware architecture, channel state information (CSI) acquisition and beamforming of massive MIMO and mmWave, small cell enabled heterogeneous virtual macro cells, user centric small cell architecture, non-orthogonal multiple access (NOMA) transmission with massive MIMO (small cell), single carrier and multicarrier transmission in MIMO (mmWave), 3D-communication, user centric distributed transmission, spectrum aggregation, dynamic spectrum utilization with shared licensed and unlicensed bands, SDN enabled offloading and load balancing for collaborative network (HetNet), and legitimate user authentication with SDN.
Emerging 5G physical and network layer research opportunities and challenges will be discussed in the last part of the tutorial. Topics in this part covers both theoretical and practical aspects, including channel modeling and characterization, system optimization, hardware distortion impact, interference coordination and minimization. Furthermore, latency, reliability, SDN enabled network security, and spectrum and network agility will be discussed at the network layer.
Part I: Physical and Network Layer Technical Analysis of 5G
o 5G introduction
o Worldwide research and standardization activities
o 5G technical requirements
o Key enabling technologies
o Multi-tier architectures of 5G access networks
o Deployment aspects of 5G (Management and Operation)
o Emerging 5G research topics
o SDN for collaborative network and HetNet
o Channel characteristics, measurement and reciprocity
o Frequency and bandwidth allocations
Part II: Advanced physical and network layer techniques for 5G
o 5G Network Waveform design
o CoMP transmission and reception
o Distributed Antenna Network (DAN)
o Cooperative Signal Transmission Techniques
o Heterogeneous Virtual Macro-cell
o Small-cell versus DAN
o Massive MIMO and mmWave
o Training sequence design and beamforming
o Channel Modeling, Characteristics and Estimation
o Hardware architecture and impairments
o Multi-tier interference management and relaying
o Spectrum aggregation and sharing
o SDN for 5G offloading and load balancing
o 5G network Authentication and Security
Part III. Emerging Research Opportunities and Challenges
o Novel physical layer waveform design
o Synchronization for NOMA
o Spatial channel modeling, estimation and prediction
o Hardware distortions in mmWave (massive MIMO)
o Form factor constrained mmWave (massive MIMO) training and beamforming design
o Device-centric cooperative transmission
o Energy efficient transmission and processing techniques
o SDN for 5G network security
o Efficient interference coordination and cancellation
Primary Audience The tutorial covers a number of key technical aspects, and summarizes the emerging research opportunities on 5G. Our target audience encompasses 5G researchers from academia, industry, government agencies and standard development bodies. We aim to bridge all stakeholders related to 5G and accelerate the ongoing R&D efforts and standardization processes worldwide.
Novelty Part of this tutorial has been presented at IEEE PIMRC 2015 (T8: Advanced Air Interface Techniques for 5G: Emerging Concepts and Research Opportunities). The current tutorial for VTC 2016 Spring contains substantial new materials, which are included to reflect the most recent development on 5G during the last one year including critical technologies, design challenges and vertical industries supported for 5G.
Biography Dr. Xianbin Wang (S’98-M’99-SM’06) is a Professor and Canada Research Chair at Western University, Canada. Dr. Wang has over 250 peer-reviewed journal and conference papers on various communication system design issues, in addition to 24 granted and pending patents and several standard contributions. Dr. Wang is a Senior Member of IEEE and an IEEE Distinguished Lecturer of Vehicular Technology Society. He was involved in a number of IEEE conferences in different roles such as symposium chair, tutorial instructor, session chair, track chair, and TPC chair. His current research interests include adaptive wireless systems, 5G networks, communications security, and distributed ICT systems.
Dr. Tadilo Endeshaw Bogale (S'09-M'14) is a joint postdoctoral researcher at Western University and INRS, Canada. Currently, he is working on assessing the potential technologies to enable the future 5G network. Specifically, his research focuses on the exploitation of massive MIMO and millimeter wave (mmWave) techniques for 5G network. His research interests include hybrid Beamforming for massive MIMO and mmWave systems and pilot contamination reduction for multicell massive MIMO systems. He has organized a workshop in CROWNCOM 2015 and participated in tutorial presentation at PIMRC 2015 conferences.
Dr. Fumiyuki Adachi is an IEEE Fellow and IEICE Fellow and a Professor at Tohoku University, Japan. Dr. Adachi is a pioneer in wireless communications since 1973 and has largely contributed to the design of wireless networks from 1 generation (1G) to 4G. He is listed in Highly Cited Researchers 2001 (http://highlycited.com/archives/)and is an IEEE Vehicular Technology Society Distinguished Lecturer since 2012. He was a recipient of the IEEE Vehicular Technology Society Avant Garde Award 2000, IEICE Achievement Award 2002, Thomson Scientific Research Front Award 2004, Ericsson Telecommunications Award 2008, Telecom System Technology Award 2010, Prime Minister Invention Award 2010, and KDDI Foundation Excellent Research Award 2012. His recent research interests include 5G mobile communications with a focus on small-cell network using distributed antennas.
Abstract—One of the most promising physical layer techniques for 5G wireless communications is the massive MIMO that can deeply exploit the spatial dimension of wireless resources via large amount of the antennas equipped at base station and thereby significantly improve frequency/power efficiencies. Nevertheless, the high dimensionality of such systems increases overhead of the transmission considerably. Hence, a successful deployment of a massive MIMO relies heavily on the availability of the low-cost transceivers. This tutorial will provide the audience with a systematically design from a low-cost point of view, including transmission schemes, power consumption, computational complexity, and even hardware cost. Then the framework of low-cost massive MIMO will be described based on recent research findings. This tutorial will also introduce key components of low-cost massive MIMO which include hybrid precoding schemes, quantized OFDM, low resolution receiver, low-rank spatial basis expansion modeling, UL/DL channel estimation for TDD/FDD system based on DFT and angle reciprocity, etc.
Tutorial Objectives TIn recent years, there has appeared substantial theoretical progress on massive MIMO system. Most of works still require very high implementation complexity or try to provide a low cost solution based on some ideal assumptions. However, a successful deployment of a massive MIMO relies heavily on the availability of low-cost transceivers. Given these challenges, communication theories and signal processing techniques must be re-conceptualized. Hence, there still exist many challenging problems in both fundamental theory and key techniques waiting to be issued, for example, how to design a low-cost massive MIMO system from the aspects of the transmission architecture, receiving architecture, as well as hardware implementation? This tutorial will try to answer the above questions and provide a possible solution to the low-cost implementation of the massive MIMO system.
Part 1: Low-Cost Massive MIMO: Transceiver Architecture, Performance Analysis and Practical Prototyping (9:00am-10:40am)
1. Concept of Low-Cost Massive MIMO (9:00am-9:10am)
a) Literature Review
b) Fundamental Limits of Current Massive MIMO techniques
c) Low-Cost Massive MIMO
2. Transceiver Architecture (9:10am-9:40 am)
a) Hybrid Precoding Schemes
b) Channel Estimation Techniques
c) Mixed-ADC Receiver
d) quantized OFDM
3. Performance Analysis (9:40am-10:10am)
a) Sum Rate Analysis
b) Resource Allocation
4. Practical Prototyping (10:10am-10:30am)
a) Fast-Prototyping Platform
b) Implementations of Concept Systems
5. Summary (10:30am-10:40am)
Part 2: A Concrete Example of Low-Cost Transmission Strategy for Massive MIMO: (10:40am-12:00pm)
1. Literature Review (10:40am-10:50am)
2. System Model (10:50am-11:10am)
a) Characteristics of ULA and Channel Vectors
b) DFT based Spatial BEM
c) Frame Structure
3. Channel Estimation (11:10am-11:40am)
a) Obtain Spatial Information through Uplink Preamble
b) Uplink Training
c) Downlink Training with Angle Reciprocity
4. Data Transmission with User Scheduling (11:40am-11:50am)
5. Summary (11:50am-12:00pm)
Primary Audience This tutorial will be of interest to all the attendees of VTC2016-Spring both from the industry, research institutes and universities.
Novelty This tutorial emphasizes the architecture of massive MIMO receivers, particularly problems with low-cost transceivers. Although tutorials have already been developed in the past one to two years for general massive MIMO systems, none of these tutorials focus on issues with low-cost transceivers. This tutorial begins with a review of literature on the promising research directions and existing challenges. Instead of addressing each issue separately, this tutorial presents a unified framework in the form of low-cost massive MIMO systems. Key components of low-cost massive MIMO will also be introduced in details.
Biography Dr. Jin received the Ph.D. degree in communications and information systems from the Southeast University, Nanjing, in 2007. From June 2007 to October 2009, he was a Research Fellow with the Adastral Park Research Campus, University College London, London, U.K. He is currently with the faculty of the National Mobile Communications Research Laboratory, Southeast University. His research interests include space time wireless communications, random matrix theory, and information theory. He serves as an Associate Editor for the IEEE Transactions on Wireless Communications, and IEEE Communications Letters, IET Communications, and a member in SPCOM-TC. Dr. Jin and his co-authors have been awarded the 2011 IEEE Communications Society Stephen O. Rice Prize Paper Award in the field of communication theory and a 2010 Young Author Best Paper Award by the IEEE Signal Processing Society.
Dr. Gao received the Ph.D. degree from National University of Singapore, Singapore in 2007. He was a Research Fellow with the Institute for Infocomm Research (I2R), A*STAR, Singapore in 2008 and an Assistant Professor with the School of Engineering and Science, Jacobs University, Bremen, Germany from 2009 to 2010. In 2011, he joined the Department of Automation, Tsinghua University, Beijing, China, where he is currently an Associate Professor. Prof. Gao's research areas include signal processing for communications, array signal processing, and convex optimizations. Prof. Gao has served as a member in SPCOM-TC, as an Editor of IEEE Transactions on Wireless Communications, IEEE Wireless Communications Letters, International Journal on Antennas and Propagations, and China Communications. He has received the IEEE ComSoc Asia Pacific Outstanding Young Researcher Award in 2013.
Abstract—The tutorial deals with cellular multi-antenna beam forming systems. After an initial Matlab-based digital MIMO beam forming fundamentals review; the tutorial dives into cellular 3GPP standardized beamforming techniques from R8 all the way to R13 4G/LTE. We explore codebook and non-codebook based beamforming; LTE evolution towards beamforming with spatial multiplexing combined; we contrast beam forming techniques from a single cell and multiple coordinated cells and we present LTE 3GPP evolution towards 3D beamforming and Large-Scale Antenna Systems. We close the tutorial showing that beamforming techniques are a must in 5G mmWave bands and present the challenges and tradeoffs of implementing hybrid (analog/digital) beam forming techniques in such high frequency bands.
Tutorial Objectives We are in the verge of a wireless industry revolution in which larger capacity, low latency, and multiple access technology coexistance will play fundamental rolls. The fifth generation of cellular communication systems bring new perspectives in the search of additional bandwidth for capacity. Main trends in that search are linked to a better and jointly use of licensed and un-license spectrum and the option of operating in larger mmWave bands. For the later, given the propagation characteristics and wave length of mmWave bands, natural expectation is that small cells and beamforming techniques will play a paramount importance for link reliability and system capacity in 5G systems. But, the introduction of beamforming techniques in cellular networks is not new. In fact, it’s being a long learning process in 4G/LTE since its stone-age introduction in 3GPP R8 to the most recent 3D version in R13. And most of the lessons learned in that process, one way or another, will find its path into 5G standards, so reviewing and understanding the evolution path of beamforming in 3GPP LTE is of importance in current times and it is the main motivation of this tutorial.
2. MIMO Beamforming fundamentals
Beamforming in 4G LTE Cellular Systems
3. Large Scale Antenna Beamforming Systems in 5G mmWave
Primary Audience Wireless professionals working on cellular Radio Access Networks
Novelty Beamforming techniques in cellular systems have been introduced in an evolutionary and innovative path within 3GPP specifications, but haven’t shown to be a mandatory requirement till the introduction of mmWaves in 5G candidates. The tutorial presents, in an original and unified way, such innovative and complex techniques and discusses the challenges to implement them in high frequency bands.
Biography Jose Edson Vargas Bautista holds a Ph.D. degree from the State University of Campinas (UNICAMP/Brazil) and a M.Sc. degree from the Aeronautics Institute of Technology at the Brazilian Aerospace Technical Center (ITA/CTA/Brazil) both in Electrical Engineering. Dr. Vargas Bautista has been recipient of full Federal M.Sc. and Ph.D. program founding from the Brazilian Federal Bureau for the Academic Excellence of Graduate Students (CAPES). He has over 15 years of work experience in various capacities related to wireless research and development. He spent time in the academy as an assistant professor member of the faculty staff at the Sao Paulo State University where he lectured Wireless Communications and Microprocessors. In 1999 Dr. Vargas Bautista joined the wireless unit of Ericsson communications working in Radio Resource and Mobility Management algorithm design for Base Station Controllers. In 2002, Dr. Vargas Bautista joined Huawei’s core R&D team in Dallas/TX working on 3G RRM algorithm design. Since 2004, Dr. Vargas Bautista is with Qualcomm Technologies in San Diego/CA working on multiple aspects of 4G wireless packet data access. Areas of expertise range from the end-to-end system architecture conceptualization and algorithm design of UE and Small Cell chip sets, to performance tuning of 3G/4G systems in commercial networks. Dr. Vargas Bautista is a recipient of QCT’s “Upendra Patel” achievement award for his active leadership rolls in Qualcomm’s LTE technology and contributions to the success of the first world multi-mode modem UE chipset. Most recently, he is working on Qualcomm’s Small Cell’s chipset development for heterogeneous networks supporting multiple antenna transmission modes, multi-RAT co-existence, self-optimizing algorithms and cognitive radio for LTE operation in unlicensed bands. Dr. Vargas Bautista has conducted a large number of international technology workshops, technology trainings, and live network performance optimization for different Qualcomm’s OEM customers and Network Operators around the globe. Dr. Vargas Bautista holds a number of patent applications and a number of IEEE published research technical papers.
Abstract—This tutorial is aimed to provide a comprehensive crash course on the critical and essential importance of spatial models for an accurate system-level analysis and optimization of emerging 5G ultra-dense and heterogeneous cellular networks. Due to the increased heterogeneity and deployment density, new flexible and scalable approaches for modeling, simulating, analyzing and optimizing cellular networks are needed. Recently, a new approach has been proposed: it is based on the theory of point processes and it leverages tools from stochastic geometry for tractable system-level modeling, performance evaluation and optimization. The potential of stochastic geometry for modeling and analyzing cellular networks will be investigated for application to several emerging case studies, including massive MIMO, mmWave communication, and wireless power transfer. In addition, the accuracy of this emerging abstraction for modeling cellular networks will be experimentally validated by using base station locations and building footprints from two publicly available databases in the United Kingdom (OFCOM and Ordnance Survey). This topic is highly relevant to the attendees of IEEE VTC, who are highly interested in understanding the potential of a variety of candidate communication technologies for 5G networks.
Tutorial Objectives 5G is coming. Quo vadis 5G? What architectures, network topologies and technologies will define 5G? Are methodologies to the analysis, design and optimization of current cellular networks still applicable to 5G? The proposed tutorial is intended to offer a comprehensive and in depth crash course to communication professionals and academics. It is aimed to critically illustrate and discuss essential and enabling transmission technologies, communication protocols and architectures that are expected to make 5G wireless communication networks a reality. More specifically, the present tutorial is focused on illustrating the critical and essential importance of spatial models for an accurate system-level analysis and optimization of 5G networks, which are expected to use different frequency bands compared to state-of-the-art networks and to rely on a much denser deployment of access points and antenna-elements, to a scale that has never been observed in the past.
Even though no clear definition of 5G networks exists to date, the vast majority of industrial and academic researchers believe that three concepts are expected to make 5G a revolution in the cellular industry:
- The utilization of millimeter-wave frequencies for high-rate data transmission.
- The densification of access points with heterogeneous characteristics (e.g., transmit-power, density, access technologies, etc.).
- The densification of antenna-elements per access point, in order to further enhance the link spectral efficiency.
Such a fundamental and radical paradigm-shift in network design and architecture requires cross-sectoral skills and background, which can very unlikely be realized by researchers that have not received personalized training on innovative technologies and adequate methodological tools to their analysis. The fundamental objective of the present tutorial is to offer to academic and industrial researchers, graduate students and professors a crash course on these essential elements that are expected to significantly shape 5G mobile cellular systems.
More specifically, a main and overarching issue is currently attracting the interest of the research community, because of its peculiarity compared to previous generations of cellular networks:
- Due to the densification of access points and antenna elements, as well as the peculiar channel models for transmission in the millimeter-wave band, the approaches used in the past for system-level simulation, analysis and optimization as a function of the network deployments are not applicable anymore. New and scalable (with the density of access points and antennas, as well as will the complexity of the new channel models) approaches need to be developed and experimentally validated for the envisaged access technologies and frequency bands.
At the end of the tutorial, the audience will receive a thorough understanding of state-of-the-art, current research activities, theoretical & practical issues, and opportunities for research & development of essential elements for 5G communications, with particular focus on new methodologies for simulating, modeling, analyzing and optimizing hyper-dense 5G cellular networks that use a variety of emerging access technologies. In particular, these new approaches for system-level simulation and modeling will be validated with the aid of experimental data related to the locations of cellular base stations and to channel propagation models at millimeter-wave frequencies.
1. The Path Towards 5G Communications
a. 5G requirements
b. 5G worldwide research activities
c. 5G potential architectures and network topologies
d. 5G transmission technologies:
----- Massive MIMO
----- mmWave communications
----- Wireless-powered communications
e. 5G standardization efforts
2. Introduction to Stochastic Geometry Modeling
a. From the grid to the point processes: Why stochastic geometry modeling?
b. Enabling mathematical tools and fundamental results
c. Application to wireless networks:
----- Ad hoc
----- Heterogeneous cellular
d. From stochastic geometry to “computational” stochastic geometry: Making stochastic geometry computationally-efficient
e. Experimental validation of stochastic geometry modeling with real base station locations, building footprints, and channel models
3. Application to 5G Networks: Ultra-Dense Heterogeneous Cellular Networks Simulation, Modeling, Analysis and Optimization
a. Stochastic geometry modeling, analysis, an optimization of μWave MIMO-aided cellular networks
b. Stochastic geometry modeling, analysis, and optimization of mmWave MIMO-aided cellular networks
c. Stochastic geometry modeling, analysis, and optimization of massive MIMO-aided cellular networks
d. Stochastic geometry modeling, analysis, and optimization of self-powered MIMO-aided cellular networks
Primary Audience Students, academic researchers, industry affiliates and individuals working for government, military, science and technology institutions who would like to learn about emerging 5G architectures, transmission technologies, communication protocols and their achievable performance, by taking into account practical channel models and network deployments. The tutorial is intended to provide the audience with a complete overview of the potential benefits, research challenges, implementation efforts and applications of enabling 5G technologies.
Novelty The proposed tutorial is offered at a time when several graduate students and research engineers have just started their research & developing activities on 5G and may benefit from the proposed comprehensive but focused crash course. 5G, in fact, is receiving the interest from a broad research community across all continents. Thus, the proposed tutorial is expected to draw a lot of interest from the wireless communications community from different parts of the world.
Biography Marco Di Renzo received the Laurea (cum laude) and the Ph.D. degrees in Electrical and Information Engineering from the Department of Electrical and Information Engineering, University of L’Aquila, Italy, in April 2003 and in January 2007, respectively. In October 2013, he received the Habilitation à Diriger des Recherches from the University Paris-Sud XI, Paris, France.
Since January 2010, he has been a Tenured Associate Professor (“Chargé de Recherche Titulaire CNRS”) with Paris-Saclay University in the Laboratory of Signals and Systems, a joint academic and research laboratory of CNRS, CentraleSupelec and University Paris-Sud XI, Paris, France. His main research interests are in the field of wireless communications theory. He is a Principal Investigator of seven European-funded research projects (Marie Curie ITN-GREENET, Marie Curie IAPP-WSN4QoL, Marie Curie ITN-CROSSFIRE, Marie Curie IAPP-SmartNRG, Marie Curie ITN-5Gwireless Marie Curie ITN-5Gaura and Marie Curie RISE-CASPER). He is a co-founder and the Chief Scientific Officer for Wireless Communications Research of the university spinoff company WEST Aquila s.r.l..
Dr. Di Renzo is the recipient of several awards, including the 2012 IEEE CAMAD Best Paper Award; the 2013 IEEE VTC-Fall Best Student Paper Award; the 2013 Network of Excellence NEWCOM# Best Paper Award; the 2013 IEEE-COMSOC Best Young Researcher Award for Europe, Middle East and Africa; the 2014 Royal Academy of Engineering Distinguished Visiting Fellowship, United Kingdom; the 2014 IEEE ATC Best Paper Award; the 2014 IEEE CAMAD Best Paper Award; the 2015 IEEE ComManTel Best Paper Award, the 2015 IEEE Jack Neubauer Memorial Award; and the CNRS PEDR prize for excellence in research and doctoral students supervision.
Currently, he serves as an Editor of the IEEE COMMUNICATIONS LETTERS and of the IEEE TRANSACTIONS ON COMMUNICATIONS. He is a Senior Member of the IEEE and COMSOC, and a Member of the European Association for Communications and Networking (EURACON.
Abstract—Wireless communication technologies are ubiquitous nowadays. Most of the smart devices have Cellular, Wi-Fi, Bluetooth connections. These technologies have been developed for many years, nonetheless they are still being enhanced. More development can be expected in the next 5 years, such as faster transmission data rate, more efficient spectrum usage, lower power consumption, etc. Similarly, cellular networks have been evolved for several generations. For example, GSM as part of 2G family, UMTS as part of the 3G family, and LTE as part of 4G family. In the next few years, cellular networks will continue the evolution to keep up with the fast-growing needs of customers. Secure wireless communications will certainly be part of other advances in the industry such as multimedia streaming, data storage and sharing in clouds, mobile cloud computing services, etc. This tutorial covers the topics on security for next generation mobile wireless networks, with focusing on 4G (LTE and LTE-A) and 5G mobile wireless networks, followed by a discussion on the challenges and open research issues in the area.
Tutorial Objectives Wireless communication technologies are ubiquitous nowadays. Most of the smart devices have Cellular, Wi-Fi, Bluetooth connections. These technologies have been developed for many years, nonetheless they are still being enhanced. For instance, Wi-Fi has been enhanced from IEEE 802.11a/b/g standards to IEEE 802.11n/ac standards. More development can be expected in the next 5 years, such as faster transmission data rate, more efficient spectrum usage, lower power consumption, etc. Similarly, cellular networks have been evolved for several generations. For example, GSM as part of 2G family, UMTS as part of the 3G family, and LTE as part of 4G family. In the next few years, cellular networks will continue the evolution to keep up with the fast-growing needs of customers. Secure wireless communications will certainly be part of other advances in the industry such as multimedia streaming, data storage and sharing in clouds, mobile cloud computing services, etc.
Wireless security is one of the most important topics and attracting more and more attention from industry, research, and academia. Network security encompasses integrity, authentication, confidentiality and non-repudiation of both user and management information. Unlike wired communication networks that have some degree of physical security, physical security in mobile wireless communication networks is impossible to achieve on wireless links (because of the broadcast nature) and therefore security attacks on information flow are the most widespread. Modification of information is possible because of the nature of the channel and the mobility of nodes. The radio channel is harsh and subject to interference, fading, multipath, and high error rates. As a result, packet losses are common even without security threats. An opponent can make use of these natural impairments to modify information and also render the information unavailable. This tutorial will address all these issues. Special attention will be paid to wireless specific issues, e.g., tradeoffs between security and power consumption, adaptively changing security protocols in response to the radio channel, etc. This tutorial covers the topics on security for next generation mobile wireless networks, with focusing on 4G (LTE and LTE-A) and 5G mobile wireless networks, followed by a discussion on the challenges and open research issues in the area.
1. Security concepts & mechanisms
a. Security services – confidentiality, integrity and authentication – and their use for protection/prevention in wireless communication networks
b. Other prevention mechanisms – access control, firewalls, and perimeter security
2. Classical mobile wireless network security
a. A quick overview of 2G & 3G Security
-----i. Network security of CDMA and GSM
-----ii. Network security of UMTS and WiMAX
3. Mobile wireless network security - 4G Security (LTE, LTE-A)
a. Vulnerabilities of LTE & LTE-A system architecture
b. LTE & LTE-A security architecture
c. LTE & LTE-A security features and mechanisms
d. Heterogeneous and small cell network security
e. Solutions to the related security issues in LTE & LTE-A
4. Next generation mobile wireless network security - 5G Security
a. Overview of potential network security of 5G networks
-----i. Security for new service delivery models
-----ii. Evolved threat landscape
-----iii. Increased privacy concerns in 5G
b. 5G radio network security
c. Flexible and scalable security architecture
d. Energy-efficient security
e. Massive MIMO security and privacy
f. High frequency communications security
g. Cloud security
5. Challenges and open research issues
Primary Audience Graduate students, professors, researchers, scientists, practitioners, engineers, Industry managers, consultants, and government security agencies.
Novelty This tutorial not only covers the current research and development on security for 4G (LTE and LTE-A), but also the latest development on security for 5G mobile wireless networks, and the unique discussions on the challenges and open research issues in the area, based on the author’s own research experience.
Biography Yi Qian is an associate professor in the Department of Electrical and Computer Engineering, University of Nebraska-Lincoln (UNL). Prior to joining UNL, he worked in the telecommunications industry, academia, and the government. Some of his previous professional positions include serving as a senior member of scientific staff and a technical advisor at Nortel Networks, a senior systems engineer and a technical advisor at several start-up companies, an assistant professor at University of Puerto Rico at Mayaguez, and a senior researcher at National Institute of Standards and Technology. His research interests include information assurance and network security, network design, network modeling, simulation and performance analysis for next generation wireless networks, wireless ad-hoc and sensor networks, vehicular networks, smart grid communication networks, broadband satellite networks, optical networks, high-speed networks and the Internet. Dr. Yi Qian is a member of ACM and a senior member of IEEE. He is serving on the editorial board for several international journals and magazines, including serving as the Associate Editor-in-Chief for IEEE Wireless Communications Magazine. He is the Chair of IEEE Communications Society Technical Committee for Communications and Information Security. He is a Distinguished Lecturer for IEEE Vehicular Technology Society.
Dr. Qian has been teaching “Network Security” every fall semester, and “Wireless Security” every spring semester after he joined University of Nebraska-Lincoln in 2009. He received two best teaching awards from the College of Engineering at UNL in the last few years. After teaching “Wireless Security” at UNL for the last six years, Dr. Qian is writing a comprehensive textbook on the topic, “Security in Wireless Communication Networks”, to be published by Wiley/IEEE Press in 2016.