Manuscript Due

Oct. 31, 2016 (closed)


Research, requirement analysis and initial standardization work towards the 5th generation of cellular systems have now been under way for a few years. The system requirements, ranging from extremely low set up and end to end delay, to the perception of infinite capacity will need novel system architecture solutions. More importantly, these requirements will increase the demand on wireless spectrum, further accelerating the spectrum scarcity problem. There has been agreement that fixed spectrum allocation and usage commonly adopted today are a bottleneck to 5G requirement fulfillment. Both academic and regulatory bodies have focused on dynamic spectrum access and or dynamic spectrum usage to optimize scarce spectrum resource.

These 5G systems will serve classical cellular services, but a large portion of traffic will be fed by machines and things. This machine type communication has yet specific requirements. They are much more delay sensitive and the fact that the expected tens of billions of devices will need to be reliably connected further increases the problem scale.

Cognitive radio, with the capability to flexibly adapt its parameters, has been proposed as the enabling technology for unlicensed secondary users to dynamically access the licensed spectrum owned by legacy primary users on a negotiated or an opportunistic basis. It is now perceived in a much broader paradigm that will contribute to solve the resource allocation problem that 5G requirements raise.

5G is expected to address a 1000x capacity compared to today’s networks, whereas available spectrum resource will, by far, not grow in the same proportion, enabling only a few new portions or frequency bands. New technologies will have to be researched and tested in order to exploit this scarce and already crowded spectrum. Besides, the convergence of cellular systems with the Internet of Things and machine-to-machine communications will require a new technology bundle in order to enable a flexible service delivery over flexible networks to optimize spectrum usage and power consumption. We believe that dynamic access, flexible radio and cognitive approaches (in a wide sense) addressed by this special issue can help address these challenges.

Topics of interest include:
  • 5G
  • Spectrum Access
  • Flexible Radio
  • Cognitive Radio
  • Spectrum Policy

Lead Guest Editor

  • Dominique Nouguet, CEA+LETI, France

Guest Editors

  • Klaus Moessner, University of Surrey, UK
  • Danijela Cabric, University of California, Los Angeles (UCLA), USA
  • Masayuki Ariyoshi, NEC Corporation, USA
EURASIP Journal on Wireless Communications and Networking