Sharif Digital Repository

Introducing a new paradigm, cognitive radio, for spectrum utilization of unlicensed users, new research on spectrum utilization of licensed users was planned. The results show inefficiency of spectrum usage, so cognitive radio network was introduced. Cognitive radio network should not have any affect on primary users activity, so these networks face with some chalenges and the important ones is the supporting of the QoS.
In this thesis after analyzing of the proposed routing metrics for finding best end-to-end path, the important ones of them were selected for more precise analyzing. After analyzing we find some disadvantage, can be improved by multi-radio. Although all of these metrics... 

One of the main application domains of Internet of Things is the smart home. There are lots of kinds object in any home and all of them need to be connected to each other for sharing information. The central management system of smart home uses this information for controlling and organizing the home. The first condition of smart home is that the home should know every detail about itself. So the network infrastructure of home is very important and every single object in home must be connected to the central management system of home. But because of variety in objects there are so many connection ways which any object uses them for connecting to the network. So the central management system...