As wireless and 3G networks become more crowded, users with mobile devices have difficulties in accessing the network. Opportunistic networks, created between mobile phones using local peer-topeer connections, have the potential to solve such problems by dispersing some of the traffic to neighboring smartphones. Recently various opportunistic routing or dissemination algorithms were proposed an...

Opportunistic networks have been the study of much research — in particular on making end-to-end routing efficient. Users’ privacy concerns, however, have not been the subject of much research. What privacy concerns might opportunistic network users have? Is it possible to build opportunistic networks that can mitigate users’ privacy concerns while maintaining routing performance? Our work-to-d...

Opportunistic routing is based on the use of broadcast transmissions to expand the potential forwarders that can assist in the retransmission of the data packets. The receptors need to be coordinated in order to avoid duplicated transmissions. This is usually achieved by ordering the forwarding nodes according to some criteria. The proposed opportunistic routing protocols differ in the criterio...

MORE (MAC-independent Opportunistic Routing & Encoding) could increase network throughput by using network coding. On the other hand, directional antenna has better power efficiency and introduce the possibility of space diversity. In this paper, the authors try to combine directional antenna with opportunistic routing protocols and tried to use Network Simulator version2 to simulate it. The re...

Opportunistic networks, as representative networks evolved from social networks and Ad-hoc networks, have been on cutting edges in recent years. Many research efforts have focused on realistic mobility models and cost-effective routing schemes. The concept of “community”, as one of the most inherent attributes of opportunistic networks, has been proved to be very helpful in simulating mobility ...

Generally, the radio channel quality of a wireless sensor network (WSN) is unstable in harsh environment. For instance, in maritime search and rescue, the nodes of WSN move dynamically, the topology changes with respect to the time and the communication link changes frequently as well. What is more, the given communication distance of nodes can limit the efficiency of routing. In view of these ...

Today’s wireless networks usually use a single-path routing protocol, derived from wired networks. Opportunistic routing makes use of the multicast nature of wireless networks. The goal of this thesis is to implement and evaluate an opportunistic routing protocol for wireless mesh networks. Since TCP is greatly important for a major fraction of the expected traffic, this work will also consider...

Opportunistic networks are wireless networks which may be used in areas where large delays are presented between data transmission also long distances may be handled by nodes. In these networks nodes may communicate with others through intermediate nodes. Data transmission takes place via various routing protocols. An opportunistic network provides standard routing protocols that are epidemic r...