Thesis
Dynamic routing for enhancing security in a mission critical network
Washington State University
Master of Science (MS), Washington State University
2011
Handle:
https://hdl.handle.net/2376/102210
Abstract
GridStat is status dissemination middleware for the electric power grid. It has an infrastructure capable of carrying the synchrophasor measurements (status variables) information from the Publisher to the Subscriber in a timely, secure, robust and resilient manner. Since this information sent to the Subscriber contains very critical data which will be used to monitor and control the status of the electric power grid, the data delivery must be as reliable as possible. The existing infrastructure has been implemented only on local clusters. The local clusters conforms these reliability standards by providing QoS guarantees for the GridStat. But when GridStat is implemented on a very large scale (Internet) no QoS guarantees can be provided by the network itself as Internet just provides best effort delivery of data and is known to be unreliable. In order to test scalability of such application we need a suitable testbed. We thus go for PlanetLab platform which is a widely used testbed for carrying out planetary scale testing. PlanetLab platform has thousands of nodes located across the globe which can be used to conduct tests of various types of short-term, long-term and parallel applications. Even though the PlanetLab platform offers a virtual environment capable of simultaneous usage of the nodes by various users it also does not provide any QoS guarantees. Hence in order to incorporate this reliability into the platform we provide QoS guarantees using our dynamic routing algorithm. Our algorithm uses a heuristic called Average Total Utility, which is a function of sending rates of the various intermediate nodes and the average round trip delay of the path between the intermediate node and the corresponding subscriber, to route the synchrophasor data dynamically. The algorithm tries to maximize the value of Average Total Utility by maintaining the delay, sending rate and packet loss requirements of the subscriber. By maximizing the Average Total Utility we improve the performance (reliability) of the network for the application.
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Details
- Title
- Dynamic routing for enhancing security in a mission critical network
- Creators
- Divya Giri
- Contributors
- Min Sik Kim (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525108201842
- Language
- English
- Resource Type
- Thesis