Computational algorithms for closed queueing networks with exponential servers
Communications of the ACM
TOSSIM: accurate and scalable simulation of entire TinyOS applications
Proceedings of the 1st international conference on Embedded networked sensor systems
A message ferrying approach for data delivery in sparse mobile ad hoc networks
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
Intelligent fluid infrastructure for embedded networks
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Using mobile relays to prolong the lifetime of wireless sensor networks
Proceedings of the 11th annual international conference on Mobile computing and networking
Exploiting mobility for energy efficient data collection in wireless sensor networks
Mobile Networks and Applications
Sink mobility protocols for data collection in wireless sensor networks
Proceedings of the 4th ACM international workshop on Mobility management and wireless access
Mobility-based communication in wireless sensor networks
IEEE Communications Magazine
Recovery from multiple simultaneous failures in wireless sensor networks using minimum Steiner tree
Journal of Parallel and Distributed Computing
Coverage-aware connectivity restoration in mobile sensor networks
Journal of Network and Computer Applications
Optimized relay node placement for connecting disjoint wireless sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
A store-carry-process-and-forward paradigm for intelligent sensor grids
Information Sciences: an International Journal
On optimal connectivity restoration in segmented sensor networks
EWSN'13 Proceedings of the 10th European conference on Wireless Sensor Networks
Establishing connectivity among disjoint terminals using a mix of stationary and mobile relays
Computer Communications
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Due to the wide range of applications in sensors and Wireless Sensor Networks (WSN), research in this area has recently received increasing attention. WSNs rely on network connectivity to deliver data to a base station through multihop communication. However, connectivity may not be always achievable for a number of reasons. In this paper, we study the problem of data delivery in disconnected WSNs. A special class of disconnected sensor networks called "Fragmented wireless sensor networks (FWSN)" is considered. A FWSN consists of several groups of connected sensors that we call "fragments". To achieve connectivity between these fragments, mobile agents move in the network and act as data relays between fragments, in order to eventually deliver data to the base station. The main contribution of this paper is the modeling of the movement of these mobile relay nodes as a closed queueing network to obtain steady state results of the distribution of the mobile relays in the network. Building on these results, we derive the distributions of the fragment-to-fragment, and fragment-to-sink delays. Comparing these analytical results to results from the TOSSIM simulator, it is shown that this model accurately captures the system behavior, and can be used to predict data delivery delays.