Vehicular Delay Tolerant Networks (DTN) use moving vehicles to sample and relay sensory data for urban areas, making it a promising low-cost solution for the urban sensing and infotainment applications. However, routing in the DTN in real vehicle fleet is a great challenge due to uneven and fluctuant node density caused by vehicle mobility patterns. Moreover, the high vehicle density in urban a...

Routing is one of the most challenging problems in Delay-Tolerant Networks (DTNs) due to network partitioning and intermittent connectivity. Most existing protocols are based on unlimited bandwidth and buffer size. Previous protocols based on limited bandwidth or buffer size (e.g., MaxProp, RAPID, etc) only consider the scenario that each node has at most one contact opportunity during any time...

In this paper, we focus on Internet-based multimedia data delivery services (e.g., services provided by Web, FTP, and video-on-demand servers). According the ITU-T (working group SG 12), the Quality of a multimedia service is defined subjectively as perceived by the user and it has defined by a set of user-related parameters: i) delay, ii) delay variation, and iii) information loss. To provide ...

Routing protocols for vehicular ad hoc networks (VANETs) have attracted a lot of attention recently. Most of the researches emphasize on minimizing the end-to-end delay without paying attention to reducing the usage of radio. This paper focuses on delay-bounded routing, whose goal is to deliver messages to the destination within user-defined delay and to minimize the usage of radio because radi...

Service composition is an effective approach for large-scale multimedia delivery. In previous works, user requirement is represented as one fixed functional path which is composed of several functional components in a certain order. Actually, there may be several functional paths (deliver different quality level multimedia data, e.g., image pixel, frame rate) that can meet one request. And due ...

In this paper, we propose a novel hierarchical routing protocol for a large wireless sensor network (WSN) wherein sensors are arranged into a multi-layer architecture with the nodes at each layer interconnected as a de Bruijn graph and provide a novel hierarchical routing algorithm in the network. Using our approach, every sensor obtains a unique node identifier addressed by binary addressing f...

Mobile Ad-hoc Network routing protocols such as AODV, DSR etc. fail in scenario in which no contemporaneous path exists between source and destination because they try to find end-toend path before data transmission which is not exist in VANET which increase delivery delay and decrease delivery ratio. So VANET uses ‘store-carry-forward’ paradigm. In network coding, source node or intermediate n...

In recent years, Wireless Sensor Networks (closely deployed nodes) are widely used in applications ranging from weather forecasting to defense. It comprises of data gathering nodes (source), transmitting nodes (routers) and data collecting node. Wide research sprang in this area for improving the efficiency of these networks in terms of packet delivery ratio, throughput and reliability by modif...

Modern Internet protocols demonstrate inefficient performance in those networks where the connectivity between end nodes has intermittent property due to dynamic topology or resource constraints. Network environments where the nodes are characterized by opportunistic connectivity are referred to as Delay Tolerant Networks (DTNs). Because of numerous applications such as low-density mobile ad ho...