This paper investigates the performance gains obtained by combining network coding and rate diversity gains in wireless environment. Network coding is a new research area which has a lot of interesting applications in practical networking systems. Link rate diversity provides another degree of freedom in wireless environment. Using network coding, intermediate nodes broadcast packets that are l...

In wireless sensor network routing protocol design and energy savings optimization is important because most of times nodes are in moving condition and deployed in remote area. This work focuses on minimizing energy consumption and maximizing network lifetime for data relay in one-dimensional queue network. An Energy Saving via Opportunistic Routing (ENS_OR) algorithm is designed to ensure mini...

Opportunistic or Delay Tolerant Networks (DTNs) may be used to enable communication in case of failure or lack of infrastructure (disaster, censorship, remote areas) and to complement existing wireless technologies (cellular, WiFi). Wireless peers communicate when in contact, forming an impromptu network, whose connectivity graph is highly dynamic and only partly connected. To cope with frequen...

Opportunistic networks are one of the most interesting evolutions of MANETs. In opportunistic networks, route connecting to the mobile nodes never exits, mobile nodes communicate with each other when they got opportunity to communicate. Furthermore, nodes are not supposed to possess or acquire any knowledge about the network topology. Routes are built dynamically, while messages are route betwe...