This special series originates from the international workshop organised by COST IC1004, held in May 2015 at the Technical University of Valencia. Initially, it publishes some key contributions presented at the workshop dealing with optimisation of 4G Networks performance and some aspects of 5G concepts for Future Radio Access Networks (RAN) beyond 2020. The series would continue with further articles dealing with 5G RAN related issues.
Edited by: Narcis Cardona, Kentaro Saito and Yan Zhang
The sleeping cell problem is one of the most critical issues for cellular deployments, consisting in the outage of a cellular station, which, conversely, works properly from the point of view of the monitoring...
This paper presents the problem formulation, development, and use of a robust dynamic genetic algorithm (GA) for channel allocation in cognitive radio. This approach offers an efficient way to access available...
Fifth generation (5G) technical requirements turned toward end-to-end capacity increase with limited latency and constant network power consumption involve dedicated research topics. Multiple radio access tech...
Small cell systems are a cost-effective solution to provide adequate coverage inside buildings. Nonetheless, the addition of any indoor site requires evaluating the trade-off between the coverage and capacity ...
Spectrum sensing is one of the most essential components of cognitive radio since it detects whether the spectrum is available or not. However, spectrum sensing accuracy is often degraded due to path loss, int...
While random access presents a promising solution for efficient uplink channel access, the preamble collision rate can significantly increase when massive number of devices simultaneously access the channel. T...
There are three pillars that characterize the new 5G revolution, namely, the use of heterogeneous wireless access technologies conforming an ultra-dense network, the software-driven flexibility of this network...