ABSTRACT
The rapid growth of wireless networking technologies, the emergence of several new devices that offer or need Internet interconnection, and a pent-up demand for wide band access, especially away from the big cities, are hampered by the problem of the frequency spectrum exhaustion for telecommunications services. A more efficient use of the spectrum passes through solutions, such as the improvement and deployment of radios with cognitive ability. In this context, the problem of neighbor discovery extends not only for the initial blind rendezvous, but also for the maintenance of periodical encounters of neighbors after such initial encounter. At this stage, it will be necessary for a node that has already found a peer to interrupt its data communication, so that nodes can become aware of changes in their surroundings and the network can support the addition of new nodes. The contribution of this paper is the creation of asynchronous, distributed and robust schedules to guarantee multiple continuous rendezvous and communication opportunities between two or more cognitive radios using control channels, employing frequency hopping with new sequences and mappings based on combinatorial design theory.
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Index Terms
Multi-Channel Continuous Rendezvous in Cognitive Networks
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