Organizer:

Mark Buckner,
Oak Ridge National Laboratory, TN, USA
Email: bucknerma AT ornl DOT gov

Abstract: In order to realize the promise of sensing and targeting the "white spaces" by cognitive radios, one of the main requirements is the capability to rapidly characterize the RF/EM environment, identify waveforms and process them in real-time. This session will address two key aspects of this capability: 1) specialized FFTs and bases functions that are central to a host of Cognitive Radio applications and 2) parallelization and vectorization of the processing in order to realize orders of magnitude improvements to efficiency. The FFT is an essential building block for a number of Cognitive Radio components: signal detection in the presence of noise power uncertainty, multi-resolution spectrum sensing, minimization of side lobes of subcarriers in OFDM modulators, multi-stream processing, and spectrum loading. Furthermore, in order to rapidly process the multitude of both small, large, and sparse FFTs, adaptive parallelization and vectorization of these algorithms is also necessary.

S3: Cognitive Coding Cooperation and Competition in Wireless Networks

Organizers:

Petros Elia
EURECOM, France,
Email: petros.elia ATeurecom DOT fr

Lucile Sassatelli
UNSA CNRS, France,
Email: sassatelli AT i3s.unice DOT fr

Abstract: The session will seek to promote results in the general area of cooperative communications and transceiver design (encoding-decoding), over different multi-dimensional delay-limited channels induced in a cognitive radio network. Such channels may include the MIMO channel, the MIMO-MAC, as well as the interference and relay channels. A very common cognitive-radio scenario asks for several nodes to jointly, and non- intrusively transmit real-time information in an energy efficient manner. This brings to the fore different transmission protocols such as MIMO and cooperative communications. However, the benefits utilizing such cooperative or MIMO protocols, often fail to materialize in the absence of properly chosen coding and decoding schemes, that are specific to these protocols. This has brought to the fore the need for novel distributed transceiver designs that perform near optimally over a plethora of such settings, keeping in mind the underlying delay-and-energy constraints in CR, as well as the complexity limitations of having possibly small nodes with limited computational capabilities. Emphasis will hence be given to work that describes novel cooperation protocols that provably or empirically result in energy efficiency, as well to works that describe the specific coding-decoding structures that implement such cooperative or MIMO protocols. The session will seek to promote the introduction of novel cooperation protocols and codes, as well as the corresponding information-theoretic and complexity analysis of such protocols or transceivers.

Organizer:

Samson Lasaulce,
Supélec, France,
Email: lasaulce AT lss.supelec DOT fr

Abstract: While game theory has been recognized of being one of the dominant paradigms to analyze important problems like congestion, routing, spectrum auction, new important areas of applications have appeared recently, which explains a recent surge of game theory in communication networks. Among the underlying key concepts we find the cognitive radio concept. The aim of this special session is to show how conventional and advanced game‐theoretic concepts and tools can be applied to cognitive wireless networks.

Organizer:

Oscar Gustafsson
Department of Electrical Engineering, Linköping University, Sweden,
Email: oscarg AT isy.liu DOT se

Abstract: For cognitive and cooperative communication techniques to get closer to actual implementation and in the end deployment an important step is to demonstrate it is reality.
By using existing architectures the development time is reduced. However, there exists several different architectures that a potential research entity would like to consider. At the moment there is no real opportunities to get an overview of these architectures and be able to compare pros and cons in a simple way.
When comparing all the different parameters (cost, capabilities, software support etc) it is for most people hard to outline and evaluate the information, if it is even easily accessible. In this special session the aim is to bring attention to the possible architectures available for implementing demonstrators and testbeds. The proposed dissemination of the session is that each presenter gives and overview presentation of the different platform, with a focus on the usability for cognitive and cooperative communication. The contributors jointly write an overview paper which outlines the architectures and provides advantages and disadvantages. This could possibly be combined with a panel discussion to provide a bit more interactivity. The main outcome of this special session is that it will assist research entities in selecting a good platform for their purpose. The overview paper will also provide a relevant guide for non-visitors and also notes for later disucssions.

Organizer:

Bertrand Mercier,
THALES Communications, France,
Email: Bertrand.mercierb AT fr.thalesgroup DOT com

Abstract: The proposed session addresses a system-wide approach to design a cognitive radio network based on cooperative sensing performed by a wireless sensor network.
The objective targeted by such a system is to allow the cognitive radio network, also known as secondary network, to communicate in spectrum holes detected by the sensor network, without interfering with the licensed networks currently in use in the area. The introduction of sensor networks to detect communication opportunities for secondary use of licensed but unused spectrum is an innovative approach currently studied, as for example in the ICT SENDORA project funded by the European Commission. This system approach involves a set of advanced wireless communications techniques for spectrum sensing, interference management, cognitive radio reconfiguration management, cooperative communications, end-to-end protocol design and cross-layer optimisation. All these enabling techniques shall form together a compound system able to improve the spectrum use in a significant way. The special session agenda allows addressing all aspects of the design of a cognitive radio network based on wireless sensor network for spectrum measurement. Starting from an architectural study and a business case study performed by a telecommunication operator, technical needs and constraints of such a concrete system are highlighted.

Organizer:

Maria-Gabriella Di Benedetto,
INFOCOM Department, University of Rome "La Sapienza", Italy,
Email: dibenedetto AT newyork.ing.uniroma1 DOT it

Abstract: As cognitive radios are clearly emerging as a strong technological opportunity, the research and development is being promoted rapidly throughout the European research centers and consortia to introduce such technologies in different layers of the protocol stack. The COST ICT Action IC0902 goes beyond the above trend by integrating the cognitive concept across all layers of system architecture, in view of joint optimization of link adaptation based on spectrum sensing, resource allocation, and selection between multiple networks, including underlay technologies. Hence, the main objective of the COST Action is to allow for coordinated research and development activities in the field of flexible spectrum use, spectrum sharing and coexistence based on cognitive radio and networking, towards a vision of networks of devices with different degrees of cognition that interact in order to maximize efficiency in resource utilization.
 

Organizer:

Dirk Slock
EURECOM, Sophia Antipolis France
Email: dirk.slock AT eurecom DOT fr

Abstract: The session is organized by the EU FET project CROWN, covers the various topics addressed in the CROWN project, including familiar
cognitive radio concepts and less familiar concepts such as Spatial Interweave. It also involves advanced agile antenna concepts such as "ESPAR". Among the scenarios considered: cognitive relays in macro-cellular systems, macro-cell/femto-cell coexistence, ieee 802.22 white space WRANs.