The Fleetnet project aims at the development of a wireless ad hoc network for inter-vehicle communications. We present the rationale behind the choice of an appropriate radio hardware and the use of a position-based routing approach and outline applications to exploit the Fleetnet platform. In addition, we discuss simulation of vehicle movements as a basis for protocol evaluation as well as aspects of Internet integration of Fleetnet. We state the basic problems together with the intended approach of tackling these challenges, thereby providing an overview of the Fleetnet project.
This article presents the latest status and achievements of the IEEE Communication Society Standards for Dynamic Spectrum Access Networks, formerly IEEE Standards Coordinating Committee 41, which develops standards in the areas of dynamic spectrum access, cognitive radio, interference management, coordination of wireless systems, advanced spectrum management, and policy languages for next generation radio systems under the sponsorship of the IEEE Communications Society. The article also envisions future directions for the DYSPAN Committee
A number of key examples of spectrum databases in wireless communications either persist or are in the process of being instantiated. Perhaps one of the most notable recent developments in this area is the spectrum databases that enable secondary usage of TV White Space (TVWS), authorized by regulators such as the FCC in the US, Ofcom in the UK, and various others internationally. Such developments have moved away from spectrum sensing for detection and secondary usage of TV band spectrum opportunities. However, it is clear that spectrum sensing might still viably assist opportunistic spectrum usage, even from a regulatory point of view, both in TVWS and in other forms of spectrum sharing. This also might be the case in wireless communications in general (e.g., in the context of self-organizing networks), particularly when spectrum sensing methods are employed to enhance or verify the operation of spectrum databases
Spectrum databases are increasingly being used, particularly in spectrum sharing mechanisms, but also in realms such as network optimization, novel licensing regimes, and regulatory monitoring, among others. Spectrum databases are often far more effective, reactive, or sometimes even are required to operate, in conjunction with spectrum sensing - especially if their operation requires automation. Given such observations, this paper presents an update on the IEEE 1900.6b standards work on spectrum sensing to support such databases. Specifically, this paper provides an overview of IEEE 1900.6 and the current work towards 1900.6b, pinpointing the latest updates and thoughts on aspects of the system model incorporating spectrum databases, as well as use cases for the standard. It particularly concentrates on some of the more recent developments and challenges that IEEE 1900.6 is addressing for 1900.6b, such as sharing of sensing infrastructures with different client constraints (noting that spectrum databases - the clients - may have very different requirements in terms of measures such as accuracy and reliability), flexibility in the definition of sensing infrastructures, and security requirements, among many others. This paper finishes by presenting some detail on an experimental set-up for an upcoming trial of the IEEE 1900.6 standard as amended with IEEE 1900.6b capabilities, supporting the operation of a spectrum database as a key European showcase
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