Workshops 3B & 4B: 5G - What’s the Big Deal?
Wednesday, 25 March 2015 (Fung Auditorium)

As 4G systems are being deployed worldwide, the communications community is preparing for the next leap in communications and is delving into intense debates on the potential roadmap to 5G communications. Novel 5G communication concepts are currently under discussion and this is a good time to start thinking about the essential features that should make their way into future 5G standards and system implementations, especially features that provide the “hooks” for novel mission critical communication applications and novel spectrum management schemes.

The 5G workshop at SDR-WInnComm 2015 brings together people from different groups of the wireless community, including industry technologists, academicians, regulatory bodies, business managers, and standards bodies, as well as different market segments, including commercial, defense and public safety. The workshop provides an opportunity to showcase research work and position papers, and stimulate discussions on topics related to the technical, regulatory, and economic aspects of 5G communication systems. The focus will be on mechanisms that enable efficient spectrum utilization and mission critical communications.

Session Agenda:

Workshop 3B
Wednesday, 25 March, 10:30-12:00 (Fung Auditorium)

  • "Impact of Spectrum Sharing on 5G Technology and Standards," Preston Marshall, Google
  • "5G, Implications for Public Safety and Critical Communications," Bruce Oberlies, Motorola
  • "5G Prototyping Checklist," David Squires, BEEcube
  • Technical presentation: LabVIEW based Software-Defined Physical/MAC layer architecture for prototyping dense LTE Networks

    Rohit Gupta (National Instruments, Germany); Russell Ford (New York University, USA); Bjoern Bachmann (National Instruments, Germany); Nikhil Kundargi, Amal Ekbal and Karamvir Rathi (National Instruments, USA); Vincenzo Mancuso (IMDEA Networks Institute, Spain); Arianna Morelli (Intecs, Italy); Sundeep Rangan (New York University, USA); Andreas Kruppe (National Instruments, Germany); Arash Asadi (IMDEA Networks Institute & University Carlos III of Madrid, Spain)

    Next generation wireless networks (5G) have to cope with significant traffic increase due to high quality video transmission and cloud-based applications. A dense heterogeneous deployment of small cells such as pico/femto cells in addition to high power macro cells is foreseen as one of the potential solutions to achieve high data rate requirements. We propose the use of Software Defined Networking (SDN) within EU FP7 CROWD (CROWD is an EU FP7 Project that stands for 'Connectivity management for eneRgy Optimised Wireless Dense networks') project as the way to manage interference within such a large number of heterogeneous base-stations. In this paper, we present an architecture and initial results based on software-defined physical and MAC layers to build a small scale LTE testbed within the lab environment using LabVIEW and the open-source NS-3 LENA LTE stack to emulate dense deployment. The proposed testbed specifically allows study of the performance of cross layer PHY/MAC algorithms within an interference limited cellular environment. We also present a novel general-purpose API for physical/MAC layer that can either be integrated with an open source LTE stack or SDN Controller. The proposed physical layer is written in LabVIEW which is a graphical based design environment with seamless RF/base-band integration with the NI PXI Platform and the main goal is to create a modifiable, configurable and scalable architecture to prototype next generation cellular systems. The current physical layer architecture of our testbed is built on the LTE standard as the baseline, however the main goal is to be able to change these parameters or even replace the different building blocks of protocol stack/physical layer based on the needs of 5G wireless systems in order to set the stage for future research for next generation wireless systems. Finally, such a testbed will be used to demonstrate a representative subset of algorithms proposed within the framework of EU FP7 CROWD project for tackling the challenges of dense deployments.

 

Workshop 4B
Wednesday, 25 March, 14:00-15:30 (Fung Auditorium)

  •  Technical papers:
A Heterogeneous Cellular Communication System for Moving Users: A 5G Prospective
Sanjay Kumar Biswash, Santosh V Nagaraj and Mahasweta Sarkar (San Diego State University, USA)
The Fifth Generation Communication (5G) system is has the several unique feature like: Massive MIMO, Device Centric Communication, Smarter Device-to-Smarter Deice, Native support for Machine-to-Machine Communication and Millimeter wave communication. The expected target for 5G network to achieve the 1000 times more system capacity, 10 times higher spectral efficiency, 100 time more energy efficiency than current network technologies, high data rate (i.e., peak data rate of 10 Gb/s for low mobility and peak data rate of 1 Gb/s for high mobility), and 25 times more average cell throughput with peak consideration of the cost and reliability of the system. The users mobility leads to the handover of device in the neighbor area, it cause the poor connection reliability and high communication cost with risk of connection loss. To address these challenges we are proposing a base station centric Device-to-device communication system, for overlapping area in 5G networks. The multiple signals from Base Station refers to overlapping coverage area, and user must be handover to next location area. For the same we are suggesting the user centric communication (without Base Station interface) to handover the device in adjacent area, until the users finalize the communication. The suggested method will reduce the signaling cost and overheads for the communication.
 
A Survey of Millimeter Wave RF Design Approaches For 5G Cellular Communications
Vivekanandh Elangovan (Virginia Polytechnic Institute and State University, USA); Dinesh Datla (Harris Corporation, USA); Jeffrey Reed (Virginia Tech, USA)
Industry and academia have started discussions on 5G cellular communications which is being projected as the next generation of cellular communications. Millimeter wave communication technology is a strong potential candidate for 5G communications given the vast attention that it has received by industry and academic research, and given the vast potential for expanded spectrum spaces. Millimeter wave system design, although viewed as novel in the cellular world, has been commonly used in satellite communications, radar, commercial and biomedical applications. Meteorological satellites, such as the MTSAT, operate in ka band (uplink of 27 – 31 GHz). Popular commercial applications include body scanners used by airport security which operates in mm wave frequencies. Airplane navigation support radars operate in the 31 – 36 GHz band. Broadly speaking, the literature discusses the application of heterodyne, superheterodyne, and direct conversion architectures for millimeter wave RF front end design. This paper has three objectives: (a) to survey existing approaches for millimeter wave RF design with focus on system level design aspects of RF signal reception and transmission; (b) evaluate their suitability for 5G communications; and (c) discuss the drawbacks of employing existing cellular RF design approaches for 5G millimeter wave communications. In 5G cellular communications, the RF design is expected to be power efficient and robust (low phase noise), and there is relatively less emphasis on spectral efficiency.
 
Effect of Imperfect Channel Estimation on Spectrum Sharing Between the Massive MIMO System and MIMO Radar
Ture Peken and Mohammed Hirzallah (University of Arizona, USA)
Massive MIMO have been introduced to improve the spectral efficiency. With massive MIMO, the systems having a much larger number of antennas per site than today are considered. Massive MIMO has several benefits which makes this technology an active research area for next generation wireless systems such as 5G. Perfect channel estimation becomes a big challenge since the maximum number of orthogonal training sequences for channel estimation are upper bounded by either the channel coherence time or the interference from the users in neighboring cells. This paper presents the problem of spectrum sharing between a communication system with a massive MIMO capability and MIMO radar. If the interference channels are assumed to be perfectly estimated by the communication users and fed back to the radar without an error, the interference at the communication receivers can be eliminated. We study how the results would change in spectrum sharing between the massive MIMO system and MIMO radar when the interference channels are estimated with linear squares (LS) and linear minimum mean squared error (LMMSE) channel estimation techniques. According to our simulation results, we get worse performance with LMMSE but nearly same performance with LS compared with using the perfect channel. Therefore, we can eliminate interference from MIMO radar even if the channel is not perfectly estimated.

 

5G Panel
Wednesday, 25 March, 16:00 (Auditorium)

with panelists:

Klaus Doppler, Nokia Research
Farooq Khan, Samsung
Preston Marshall, Google
Bruce Oberlies, Motorola
David Squires, BEEcube
Ed Tiedemann, Qualcomm
 
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