Ad Hoc Wireless Networks: Protocols and Systems
Ad Hoc Wireless Networks: Protocols and Systems
Link fragility and longevity in directional networks
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
Critical technology gaps and potential solutions for mobile free space optical networking
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Free-Space Optical Communications for Next-generation Military Networks
IEEE Communications Magazine
Autonomous Reconfiguration in Free-Space Optical Sensor Networks
IEEE Journal on Selected Areas in Communications
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Mobile Free Space Optical (FSO) links suffer from frequent link blockages due to opaque obstructions or link degradations that can result in degraded or failed networks. In this paper, a dynamic layer-1 based topology and routing control methodology is presented for assuring connectivity in networks with fragile links. Core components of this methodology are described with special emphasis on the dynamic topology optimization algorithm and topology transition schemes. The effectiveness of the proposed methodology depends on the fragility of links compared to the topology optimization duration. If the link fragility is comparable to the time taken to achieve the optimal topology, then this methodology will not lead to a stable network. A companion paper [1] presents link fragility results for various types of terrain and demonstrates that the expected link longevity is significantly greater than the time taken by the proposed dynamic network optimization scheme. Thus, network connectivity can be greatly improved by employing the proposed dynamic topology control methodology and optimization of physical network parameters such as antenna height.