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Sink mobility brings new challenges to densely deployed and large wireless sensor network. When the sink moves, frequent location updates from the sink can generate excessive power consumption of sensors. In this paper, we propose OAR, an optimized agent-based routing protocol that provides efficient data delivery to mobile sink. Proposed algorithm reduces signaling overhead and improve degraded route...
In this paper, we propose a Network Mobility (NEMO) based ZigBee Mobile Router architecture and operations for supporting the network mobility of ZigBee network. Also, we present a design and implementation of the ZigBee mobile router for healthcare system. The architecture is particularly useful to manage patient's mobility where each patient is equipped with ZigBee sensor nodes.
In last decade intelligent transportation systems (ITS) and vehicular ad hoc network (VANET) became one of the most active and emerging fields of research. It is expected that this technology will bring revolutionary changes in transportation system and offer various services to make journey safer, secured, and more comfortable. In the meantime, US FCC allocated a block of frequency spectrum (popularly...
Mobile ad-hoc networks have emerged as an efficient solution for communicating in critical scenarios, such as emergency and rescue operations. However, the infrastructure-less and dynamic nature of these networks make them vulnerable to network partitions, which directly affects the data delivery process. To mitigate the impact of partitioning, we introduce a new architecture that employs sensors...
In tactical applications of wireless sensor networks (WSNs), such as intruder detection, tracking, and patrol operations, there tend to be multiple, mobile end-users who work amidst the sensors in the field to which data from individual sensors must be directly delivered. Efficient data dissemination in such networks is a challenging problem, since sensors with detections must be able to identify...
In this paper, we present two new ldquospatiotemporal multicastrdquo protocols for supporting applications which require spatiotemporal coordination in sensor networks. The spatiotemporal character of mobicast relates to the obligation to deliver a message to all the nodes that will be present at time t in some geographic zone Z, where both the location and shape of the delivery zone are a function...
Many anonymous communication solutions have been proposed to provide anonymous mobile ad hoc network (MANET) communications. However, they mainly focus on the routing layer and above to hide the end-to-end traffic patterns. The point-to-point communication relations are often considered as non-critical information in terms of anonymity, which actually exposes the traffic patterns on the PHY/MAC layer...
In this paper, improving DS/SS inter-vehicle communication using p-persistent CSMA MAC protocol is studied. It is possible for p-persistent CSMA to adapt optimally to current packet traffic situation by setting p to an appropriate value. Therefore, improvement of IVC performance is expected if optimal p value can be set according to the traffic of vehicles. In order to perform this, the scheme where...
Unattended Wireless Sensor Networks (UWSNs) are composed of many small resource-constrained devices and operate autonomously, gathering data which is periodically collected by a visiting sink. Unattended mode of operation, deployment in hostile environments and value (or criticality) of collected data are some of the factors that complicate UWSN security. This paper makes two contributions. First,...
The use of IEEE 802.11p for supporting intelligent transportation systems (ITS) enables enhancing the drive experience to provide vehicle users with useful information related to road efficiency and public safety. Safety services, such as collision or sudden hard braking warning, are used to improve passenger safety and reduce fatalities. Along with the delay-critical nature of those services, the...
Collaborative working manner of individual satellite nodes demand totally distributed algorithms and protocols. The mobile nature of these nodes requires that these algorithms and protocols must be adaptive to the ceaseless topology changes. This paper proposes an adaptive decision making function and weight factor in a highly efficient algorithm for the distributed nodes, which helps solving the...
Recent years have seen a proliferation of work on the Semantic Web, an initiative to enable intelligent agents to reason about and utilize World Wide Web content and services. Concurrently, the networking community has developed a concept of the knowledge plane, using artificial intelligence to reason about and manage network behavior. These two efforts have progressed independently despite potential...
The overlay-based network architecture has been recognized as an effective way to deal with the funneling effect in sensor networks, where sensors closer to the sink are usually responsible for relaying more network traffic. Such funneling effect is particularly harmful when the number of sensors in the network is vast. In an overlay-based sensor network, a special type of resource-rich multi-radio...
InVeTraS (intelligent vehicular transportation system) is proposed as a vehicle-to-vehicle (V2V) anti-collision mechanism that determines, estimates and absolves collision courses between two or more vehicles based on a correlative and cooperative wireless networking concept. The problem of collision avoidance is abstracted to the generic problem of location awareness and subsequent periodic information...
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