Non-cooperative and Cooperative Spectrum Sensing in 5G Cognitive Networks

Abstract

5G is the expected next step of the mobile cellular network evolution, and it is considered as the answer to the ongoing huge increase of cellular users and services. The architecture envisioned for 5G includes a large number of different network entities and systems that share a common spectrum resource via a dynamic spectrum access (DSA) approach. This solution is expected to significantly increase the overall spectrum efficiency but also introduces the challenge of optimizing the coexistence between the entities forming the overall network, by limiting their mutual interference. Within this context, the cognitive radio (CR) paradigm, mainly focusing on its peculiar function, that is, spectrum sensing (SS), is being currently proposed as one of the main enablers for efficient DSA with limited interference. The goal of this chapter is to provide a comparative analysis on CR-inspired spectrum resource management (CR-SRM) mechanisms recently proposed for the 5G architecture, which mainly exploit SS, in order to characterize up-to-date research trends on the topic and highlight stillopen challenges and possible future work directions.

A Novel T–Test Based Spectrum Sensing Technique for SIMO and MIMO Cognitive Radio Networks

“…Motivated by the ever-increasing demand for the precious electromagnetic spectrum, the conception of opportunistic spectrum access has emerged in recent decades [1,2]. Cognitive Radios are seen as one of the most innovative solutions to implement the opportunistic spectrum access which is also denoted as spectrum sharing [3][4][5]. In CR networks, the secondary user (SU) (unlicensed user) should identify the white space of the considered spectrum, periodically monitor the activity of the primary user (PU) (licensed user), and share the spectrum in an intelligent way.…”

Intelligent Allocation of Channel Resources in 5G Network

“…One may think the emergence of newer technologies will help the process to create an efficient 5G network, but this will make it very challenging to implement. Such potential challenges that may hinder the effective implementation of this network are astronomical growth regarding mobile internet service and its traffic, and a high level of spectrum scarcity [4]. Cognitive Radio is one of the most encouraging technologies of 5G networks, where it garnered significant industrial and academic attention.…”