Abstract
Spectrum requirement is the biggest issue in the field of communication. Because
of new technology and applications expansion bandwidth becomes more crucial. Many
methods and techniques are used to solve this problem. One of them is bandwidth sharing
cognitive radio technique. This paper shows b
andwidth sharing in
cognitive radio using
common control channel. For this purpose after spectrum sensing, actual work spectrum
sharing is done. New secondary user comes into the network and checks spectrum
availability by using one of the spectrum sensing techniques, if spectrum is free than
spectrum sharing technique assigns available channel to new user without harming existing
primary users. This is done through first come first serve bases. Priority is given to the
primary users. If existing spectrum band contains secondary users and new primary user
comes into the network when no more spectrum band is free then one of the secondary user
needs to vacant the band and that spectrum band is allocated to new primary user. In this paper simulation results have been described which gives exact idea of spectrum sharing.
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