From the last two decades the communication networks were undergoing many changes, whereas few years ago the network was exclusively used to connect IT users. Ubiquitous and personal computing is an emerging technology in the networking field. Every modern business is completely dependent on enterprise network; it has become the most demanding areas of business communication and decision making. The idea of the network as a service is admired because of low cost network implementation and multivendor network. IT organizations are starting to witness a massive increase in video traffic. Consider by 2020 the Internet video alone will account for 60% of all consumer traffic. By 2020, there will be nearly everyone will be connected to the Earth. The huge network of mobile devices needs to be handled not just as demands of employees but as a business necessity. The paper presents an overview of Next Generation Networks (NGN). In Cognitive Radio (CR) various spectrum sensing techniques are used. The radio spectrum scarcity issue can be efficiently handled by cooperative game theory approach.

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Radio Spectrum Resource Allocation Dynamic Spectrum Access Cooperative Game Theory.