Reconfigurable networks are a powerful framework, because they can change topology in real-time to best handle changing traffic conditions. This allows for more intelligent and efficient use of the network's limited resources. However, it is difficult to fully utilize the benefits of reconfiguration.
One way to realize these networks is by using steerable free-space optics (FSO). Steerable FSOs are uniquely suited for a wide range of scenarios since they are wireless and highly directional. Because FSOs are wireless, they can be easily deployed in situations where wired networks are impractical. Since FSO transmitters and receivers are directional, they essentially cause zero interference, and can therefore be used to create dense networks unlike other wireless technologies. However, there are several challenges that must be addressed before steerable FSOs can be realistically used.
In this work, we address two main challenges of reconfigurable networks based around steerable FSO links: 1) reliability and consistency of the underlying FSO links, and 2) fully utilizing the reconfigurability of the network. For the first part, we propose several tracking and pointing (TP) systems that maintain the FSO link even when the transceivers move beyond the inherent tolerances of the link. Each TP system is designed around a specific environment: picocell backhaul network, datacenter, and virtual reality system. For the second part, we propose several algorithms for reconfigurable networks including initial network design given specific restrictions, and heuristics for reconfiguring the network at runtime. Together this work helps to make FSO-based reconfigurable networks a reality and showcase their benefit.
|Commitee:||Das, Samir, Balasubramanian, Aruna, Longtin, Jon|
|School:||State University of New York at Stony Brook|
|School Location:||United States -- New York|
|Source:||DAI-B 82/7(E), Dissertation Abstracts International|
|Keywords:||Free-space optics, Wireless networking, Tracking and pointing|
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