Medium Access Control (MAC) protocols plays very important role in Cognitive Radio (CR) networks. CR enables the Secondary (unlicensed) Users (SU) to opportunistically access the spectrum unused by the Primary (licensed) Users (PU). The two main functions of the CR MAC are interference control and avoidance for PUs and collision avoidance among SUs. This book is the case of overlay spectrum sharing mode of contention based, distributed, non cooperative spectrum sharing access mode protocol. In order to devise efficient CR MAC protocol, it will be efficient to use CSMA/CA based protocol as it...

A Delay Tolerant Networks (DTNs), also known as intermittently connected wireless mobile networks, works effectively at the time of discontinuous network connectivity between two nodes. A communication network which is capable of storing packets momentarily in intermediate nodes and conveys the packets when end-to-end route is re-established or regenerated is known as a delay tolerant network/ disruption tolerant networks. Many routing protocols have been developed for DTN based on movement pattern of the nodes. In this book we presents a novel routing protocol which exploits mobility...