The 2013 Johannesberg Summit, May 20-21, brought together wireless/mobile industry R&D leaders with leading academics from all over the world to probe into the future of wireless. Thes summit is an annual forum to discuss trends, ”what’s hot and what’s not”, that may influence to long range developments of the Industry. Discussions took place around the “Future of Wireless” with a broad perspective on services, technologies, policies and business models that may have an impact in the long-range evolution of the industry.
Watch videos of talks and interviews with the participants
The event is a joint endeavor between Wireless@kth and Ericsson.
Network sharing is a commonly used solution for macro cellular networks when mobile operators want to exploit benefits of sharing infrastructure, typically to save network costs. For local area and indoor networks infrastructure sharing using distributed antenna systems (DAS) and repeaters are commonly used solutions to improve indoor coverage. For these applications multi-operator solutions are well known and supported by both standardization bodies and by collaboration practices. However, when local networks are discussed in terms of femtocell solutions, offloading or heterogeneous networks, the multi-operator context seems to be forgotten. Small cells are often presented in a single-operator context.
Cognitive radio (CR) systems have been proposed for efficient usage of spare spectrum licensed to primary systems. This leads to the issue of providing as much spectrum to CR users as possible while not degrading the quality of service (QoS) of primary users of the spectrum. This paper proposes a novel cooperation scheme between primary and CR users to guarantee QoS of primary users up to the cell edge while making the licensed spectrum available for opportunistic access by the CR users.
This paper considers a distributed power allocation scheme for sum-rate-maximization under cognitive Gaussian multiple access channels (GMACs), where primary users and secondary users may communicate under mutual interference with the Gaussian noise.
We report results from the recently finished QUASAR project, which has studied overall system aspects of cognitive radio technologies and has paid attention particularly to the economic viability of different use cases. We find that successful secondary sharing goes far beyond the detection of spectrum holes. Large-scale commercial success requires that secondary systems are scalable so that a large number of users can be served in an economically viable fashion.