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Dr. Mills research interests are in the areas of (1) computer network architectures, algorithms and protocols, (2) computer and network security, (3) computer communications systems hardware and software technology, (4) digital radio communication systems engineering.
The primary interest in (1) is computer network time synchronizationtechnology, including the analysis of algorithms,synthesis of architectures and protocols, and experimental test and evaluation.The Network Time Protocol (NTP) developed in theNetworkTime Protocol Project is now widely deployed in the Internet aroundthe globe. Research over the last 30 years has continuously improved theaccuracy, reliability, security and portability of the design and implementation.And, since NTP has already conquered this planet, theTimekeepingin the Interplanetary Internet Project funded by NASA/JPL has extendedNTP technology to the planets and beyond.
Work (2) funded by the Defense Advanced Research Projects Agency (DARPA) on theAutonomous Networks Project developed authentication and configuration algorithms and protocols for very large distributed networks, including ad-hoc sensor networks. This technology provides hands-free deployment of distributed applications in which time synchronization is automatically managed and secured without requiring prior analysis and engineering at each site.
Work (3) also funded by DARPA includes the analysis, design and implementation of high speed network switching and scheduling technology. TheHighball Project is an example of this technology operating at speeds to a gigabit per second in wide area networks spanning the country. It includes a number of high speed crossbar switches connected to each other and to participating hosts by optical fiber. A distributed algorithm receives reservation requests from the hosts and generates a switching schedule so that bursts transmitted by the hosts are guaranteed not to collide with each other on the way to their destinations. The switches do not need to interpret the data bursts themselves; therefore, the switching fabric can be made transparent and require no buffer storage.
Some projects (4) started as proof-of-concept demonstrations and somehow evolved a life of their own, including receivers and digital signal processors for specialized radio communication and navigation services, especially those used to disseminate national time standards. The research content in these projects is represented by the intricately engineered digital signal processing algorithms, which use a combined linear and nonlinear approach to achieve performance demonstrably better than current commercially available equipment. A summary of these contributions is in theCollaboration Resources web page.
Past research interests that have a habit of resurfacing from time to time include network performance evaluation, protocol engineering and routing algorithm design. This includes work in the early 80s on the design, implementation and testing of the IP/TCP protocol stack, especially TCP and dependent applications. The bottle of TCP mouthwash above, available at fine stores in Britain, is offered as authentic credentials in this area. Among theslide show archives is a tutorial on the technical history of the Internet and other adventures over the last 34 years. But, Internet technology is much older than that. In fact, there is evidence that theaddressing of things was invented by Oliver Cromwell in 1653.
