Mobile Delay Tolerant Networks (MDTNs) are wireless mobile networks in which a complete routing path between two nodes that wish to communicate cannot be guaranteed. A number of networking scenarios have been categorized as MDTNs, such as wildlife tracking sensor networks, vehicular ad hoc networks, pocket switched networks, etc. The network asynchrony, coupled with the limited resources of mob...

Delay (or disruption) tolerant sensor networks may be modeled as Markovian evolving graphs [1]. We present experimental evidence showing that considering multiple (possibly not shortest) paths instead of one fixed (greedy) path can decrease the expected time to deliver a packet on such a network by as much as 65 per cent depending on the probability that an edge exists in a given time interval....

Delay Tolerant Network (DTN) can be defined as an approach to Computer Network Architecture which provides a promising solution that seeks to address the technical issues in the regions where end-toend network connectivity may lack continuously or is not available. These problems are aggravated by end nodes with limited power or memory resources. In DTNs, the intermediate nodes on a Transmissio...

Advances in ubiquitous mobile computing has given rise to the pervasive deployment of physical devices embedded with sensors, software, and wireless communications that collect and exchange data. These devices are adept for deployment in environments with minimal existing infrastructure, as the devices themselves become the components of a functioning network. With the addition of mobility, the...

Delay Tolerant Networks (DTNs) have emerged as communication paradigm for providing endto-end routing based on opportunistic forwarding, without the need for costly infrastructure. Nevertheless, empirical studies have shown that opportunistically integrating encountered infrastructure—e. g. Internet access via WiFi—into hybrid DTNs can significantly boost routing performance. However, designing...

Routing in delay and disruption-tolerant networks (DTNs) relies on intermediary nodes, called custodians, to deliver messages to destination. However, nodes usually differ significantly in terms of available resources: energy, buffer space, and bandwidth. Routing algorithms need to make the most efficient use of custodian resources while also making sure those in limited supply are not exhauste...

Delay tolerant networks (DTNs) are a special type of wireless mobile networks which may lack continuous network connectivity. Multicast supports the distribution of data to a group of users, a service needed for many potential DTNs applications. While multicasting in the Internet and mobile ad hoc networks has been studied extensively, due to the unique characteristic of frequent partitioning i...

As experience with the Web 2.0 has demonstrated, users have evolved from being only consumers of digital content to producers. Powerful handheld devices have further pushed this trend, enabling users to consume rich media (for example, through high resolution displays), as well as create it on the go by means of peripherals such as built-in cameras. As a result, there is an enormous amount of u...

Many multicast protocols for Delay Tolerant Networks fall in the class of tree based algorithms. Most of these tree computations aim to reduce the time taken by the message to reach its recipients. However, many scenarios have a greater demand to save on the space usage than on the time requirement. The present work proposes a tree computation technique that aims to reduce the duplication of me...