Title :
Dynamic topology optimization and transition schemes for assuring connectivity in multihop mobile optical wireless communications networks
Author :
Velez, Paul ; Dwivedi, Anurag ; Harshavardhana, P. ; Tebben, Daniel ; Hammons, A. Roger, Jr.
Author_Institution :
Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD, USA
Abstract :
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 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.
Keywords :
mobile radio; optical communication; optical links; optimisation; telecommunication network reliability; telecommunication network routing; telecommunication network topology; dynamic network optimization; dynamic topology optimization; link fragility; mobile free space optical links; multihop mobile optical wireless communications networks; network connectivity; routing control methodology; topology transition schemes; Context awareness; Crisis management; Earthquakes; Economic forecasting; Environmental economics; Monitoring; Network topology; Optical fiber networks; Spread spectrum communication; Wireless communication;
Conference_Titel :
Military Communications Conference, 2009. MILCOM 2009. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-5238-5
Electronic_ISBN :
978-1-4244-5239-2
DOI :
10.1109/MILCOM.2009.5379830