• Wednesday, 14 June, 11:00-12:30, Room Theatre Piki Hall
  • Session Chair: Hans-Peter Mayer (Nokia Bell Labs, Germany)



11:00 Computational and Experimental Studies for Probe Ring Radius in MIMO OTA Test Systems

Dmytro Anin (University of Oulu, Finland); Md Miah (Aalto University & School of Electrical Engineering, Finland); Erkki T. Salonen (University of Oulu, Finland)

The effect of the probe ring size in OTA test systems was studied based on simulations and OTA measurements in the anechoic chamber of the University of Oulu. The results are presented for two methodologies: Prefaded Synthesis (PFS) and Plane Wave Synthesis (PWS). Each size and synthesis type was validated for urban micro-cellular (UMi) and urban macro-cellular (UMa) radio channel models and for the cases the DUT in free space and in phantom hand.


11:18 Experimental Analysis on Possible Coexistence Issues Related to the Introduction of LTE in the 2300-2400 MHz Band

Valeria Petrini and Doriana Guiducci (Fondazione Ugo Bordoni, Italy); Claudia Carciofi (FUB, Italy); Claudio Cecchetti (Fondazione Ugo Bordoni, Italy); Manuela Vaser (University of Rome Tor Vergata, Italy); Elisa Ricci (Università di Roma Tor Vergata, Italy); Elio Restuccia (Istituto Superiore delle Comunicazione e delle Tecnologie dell'Informazione - MISE, Italy); Gianmarco Fusco (Istituto Superiore delle Comunicazione e delle Tecnologie dell'Informazione, Italy)

A significant change in the use of Internet content is actually ongoing. Users rely more and more on mobile radio technologies, thanks to a capillary diffusion of LTE mobile terminals. It leads both to investigate techniques to use more efficiently the already assigned spectrum and to study further spectrum resources in millimeter-wave bands for 5G systems. Recent regulatory initiatives of the European Commission focused on developing conditions for the introduction of WBB (Wireless Broadband) in the 2.3 GHz band. In response to the invitation of the European Commission to the Member States to perform specific analysis in this framework, Fondazione Ugo Bordoni and ISCOM (Istituto Superiore delle Comunicazioni e delle Tecnologie dell'Informazione) investigated the possible coexistence between Wi-Fi and LTE, planned to be in the adjacent bands due to the need of better characterize the performance of different Wi-Fi devices in a real LTE network. The new methodology based on the combination of on air and laboratory measurements can be applied in other sharing scenarios for the development of the future 5G systems.


11:36 System Analysis and Design of mmW Mobile Backhaul Transceiver at 28 GHz

Giuseppe Destino (University of Oulu, Finland); Olli Kursu, Saila Tammelin and Jari Haukipuro (Centre for Wireless Communications, University of Oulu, Finland); Marko Sonkki, Timo Rahkonen and Aarno Pärssinen (University of Oulu, Finland); Aki Korvala and Marko Pettissalo (Nokia, Finland); Matti Latva-aho (UoOulu, Finland)

In the next generation of mobile network, 5G, mm-wave (mmW) communication is considered one of main disruptive technologies to increase data rates and improve spectrum efficiency. Wireless backhaul with stationary or moving nodes is one of the best candidate use-cases. This paper provides a comprehensive analysis on the architecture and design of mmW transceiver with automatic gain control (AGC) for mobility management. The focus is on the RF component requirements, especially, power amplifiers, low-noise amplifier and antennas as well as on their impact on the link-budget. Results are provided based on real figures of commercial components.


11:54 Measuring LTE and WiFi Coexistence in Unlicensed Spectrum

Nikos Makris (University of Thessaly & CERTH, Greece); Agorastos Dimitrios Samaras and Virgilios Passas (University of Thessaly, Greece); Thanasis Korakis (New York University, USA); Leandros Tassiulas (Yale University, USA)

The exponential growth in mobile services demand, along with the scarce licensed spectrum in the sub-6GHz bands, mandate the exploitation of bands other than the traditionally used by mobile broadband technologies. An example of such operation is the opportunistic access of the unlicensed bands by the LTE technology, as a means to increase the delivered end-user capacity and enhancing the overall quality of experience. In this paper, we present some extensive testbed measurements used for modeling the coexistence of LTE and WiFi technologies when operating within the same unlicensed environment. The experiments deal with different bandwidth settings for both the WiFi and LTE technologies, when LTE is operating closely or inside the primary or secondary channels of IEEE 802.11, taking into account the different threshold values for the Clear Channel Assessment functions that WiFi entails. We present exhaustive experimental measurements, collected under a real testbed setup, and present a cognitive algorithm for minimizing the impact of the two technologies to each other.


12:12 Application of LTE 450 MHz in the Electric Energy Sector

Dick Carrillo (CPqD, Brazil); Ricardo Caldeira (Fundação CPqD - Centro de Pesquisa e Desenvolvimento em Telecomunicações, Brazil); Renato Coutinho (CPqD, Brazil)

The existing electric grid system in Brazil is facing many challenges, this encourages the roll out of smart grid system to reinforce the existing grid system. In this context energy companies are seeking for solutions and applications to grow and expand their network, improving reliability and coverage. One of the key technologies of smart grid is two-way communication between smart grid components. Considering that wireless communication outperforms wired communication, it becomes a good option to provide connectivity to smart grid that covers a wide range of geographical areas. This article presents a successful application of LTE 450 MHz in electric energy sector, it allows remote control of reclosers in an electric distribution network, thus giving a faster fault diagnosis, recovery and maintenance of faulty electric circuits. In comparison to similar solutions LTE 450 MHz provided a reliable coverage beyond 40 Km.