scholarly journals Hybrid Multi-Antenna Techniques for V2X Communications—Prototyping and Experimentation

Telecom ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 80-95
Author(s):  
Konstantinos Maliatsos ◽  
Leonidas Marantis ◽  
Petros S. Bithas ◽  
Athanasios G. Kanatas
Keyword(s):  
Intelligent Transportation System ◽  
Signal To Noise Ratio ◽  
Access Network ◽  
Maximal Ratio Combining ◽  
Connected Vehicle ◽  
Printed Antennas ◽  
Horizon 2020 ◽  
Vehicle To Vehicle ◽  
Radio Access ◽  
Hybrid Diversity

The support of the connected vehicle-to-everything (V2X) vision in conjunction with intelligent transportation system applications and services constitute a major 5G objective for modern radio systems and networks. More particularly, 5G deployment will involve multiple radio access network (RAN) technologies and a massive machine-type communication environment, offering a simultaneously supported variety of broadcast, multicast, and unicast applications. In this article, we present an implementation of a diversity engine able to support the multi-objective, multi-RAN, multi-service V2X use cases. The engine is enhanced with the adoption of a hybrid diversity scheme that exploits the beamshaping capabilities of the reconfigurable electronically switched parasitic array radiator (ESPAR) antennas. The hybrid scheme combines conventional maximal ratio combining with beamspace diversity and it improves system performance in terms of reliability and throughput with increased signal-to-noise ratio. It was implemented and demonstrated with integration of novel printed antennas on connected, vehicle-to-vehicle (V2V)-enabled trucks in the context of the Horizon 2020 project ROADART.

scholarly journals Cooperation and information replication in wireless networks

2016 ◽  
Vol 374 (2062) ◽  
pp. 20150123 ◽  
Author(s):  
Konstantinos Poularakis ◽  
Leandros Tassiulas
Keyword(s):  
Network Performance ◽  
Access Network ◽  
Network Architectures ◽  
Backbone Networks ◽  
Network Bandwidth ◽  
Multicast Service ◽  
Radio Access ◽  
Maximum Benefit ◽  
Wireless Medium ◽  
Cell Tower

A significant portion of today's network traffic is due to recurring downloads of a few popular contents. It has been observed that replicating the latter in caches installed at network edges—close to users—can drastically reduce network bandwidth usage and improve content access delay. Such caching architectures are gaining increasing interest in recent years as a way of dealing with the explosive traffic growth, fuelled further by the downward slope in storage space price. In this work, we provide an overview of caching with a particular emphasis on emerging network architectures that enable caching at the radio access network. In this context, novel challenges arise due to the broadcast nature of the wireless medium, which allows simultaneously serving multiple users tuned into a multicast stream, and the mobility of the users who may be frequently handed off from one cell tower to another. Existing results indicate that caching at the wireless edge has a great potential in removing bottlenecks on the wired backbone networks. Taking into consideration the schedule of multicast service and mobility profiles is crucial to extract maximum benefit in network performance.

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