Both the cognitive radio (CR) and the fifth generation of cellular wireless standards (5G) are considered to be the future technologies: on one hand, CR offers the possibility to significantly increase the spectrum efficiency, by smart secondary users (CR users) using the free licensed users spectrum holes; on the other hand, the 5G implies the whole wireless world interconnection (WISDOM-Wireless Innovative System for Dynamic Operating Megacommunications concept), together with very high data rates Quality of Service (QoS) service applications. In this paper, they are combined together into a "CR based 5G". With this aim, two novel ideas are advanced: the 5G terminal is a CR terminal and the CR technology is chosen for WISDOM concept. Thus, the 5G takes CR flexibility and adaptability and makes the first step through a commercial and tangible form.
In the recent years Cognitive Radio (CR) technology imposed itself like a very good solution to the increasing spectrum utilization. This technology recommends the development of a new radio type-a cognitive radio-endowed with intelligence that shall sense, share, and use the spectrum opportunities (SOP) of the preexisting wireless networks, that is the channels that are not used by the licensed users.A new routing algorithm for CR networks (CRN): SAGRA-Spectrum Aware Geographic based Routing Protocol is presented in the paper. As suggested by the name, the geographic, and the spectrum aware routing concepts were used together in the protocol's design. The dynamism and flexibility, characteristic to both CR and IP networks, made us compare the CR concept with the IP concept (a wireless versus wired flexible environment comparison); thus we assumed the IP routing approach for CRN. The proposed strategy is based on hop-by-hop routing, local decisions being taken by nodes according to both local information (CR node's neighborhood) and global information (the entire topology of CRN), channels availability, and destination location.
With the tremendous expansion of the Internet and devices connecting to computer networks, cyber security has become critical in information protection, data storage and use in the virtual environment. A system for detecting the user behavior in a network is a tool for Security Information and Event Management (SIEM). This technology provides real-time analysis of security alerts generated by applications and hardware networks.Keywords: security, network security, cyber security, SIEM, detection of user's behavior, program for detecting the abnormal behavior of users.I.
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