This paper proposes a formal definition of the robustness property which, we believe, developers of future real-time (RT) local area network (LAN) protocols must aim to realize. A s a demonstration of the utility of this definition, the Carrier Sense Mult iple Access with Deterministic Collision Resolution (CSMA/DCR) protocol is then analyzed for its robustness and an extension of the CSMA/DCR ...

Controller Area Network CAN is a serial com munications protocol for transmitting short control messages in a real time embedded system For larger messages several higher level transport pro tocols have been proposed and standardized for a wide range of applications These protocols gen erally assign the same xed priority to all frames in a given message This paper presents a new transport proto...

It is widely known that Control Area Networks (CAN) are used in real-time, distributed and parallel processing which cover manufacture plants, humanoid robots, networking fields, etc., In applications where wireless conditions are encountered it is convenient to continue the exchange of CAN frames within the Wireless CAN (WCAN). The WCAN considered in this research is based on wireless token ri...

In this paper, we will present a method to enable hard real-time communication with guaranteed quality of service over shared media Ethernet. This method is based on an extension of the standard medium access control by a deterministic token-passing protocol that could also be applied to other network technologies such as HomePNA or Powerline. We show that the assignment of QoSand real-time par...

Title of dissertation: Real Time Terminal Area Trajectory Planning For Runway Independent Aircraft Min Xue, Doctor of Philosophy 2006 Dissertation directed by: Assistant Professor Ella M. Atkins Department of Aerospace Engineering The increasing demand for commercial air transportation results in delays due to traffic queues that form bottlenecks along final approach and departure corridors. In...

_______________________________________________ This work was supported in part by the U.K. EPSRC, grant number 06R00456 Department of Computer Systems, P.O. Box 325, S-751 05 Uppsala, Sweden (E-mail: [email protected]) Abstract The increasing use of communication networks in time critical applications presents engineers with fundamental problems with the determination of response times of communi...

Volume models often show high depth complexity. This poses difficulties to the observer in judging the spatial relationships accurately. Illustrators usually use certain techniques such as improving the shading through shadows, halos, or edge darkening in order to enhance depth perception of certain structures. Both effects are difficult to generate in real-time for volumetric models. Either th...

The Controller Area Network has a maximum transmission rate of 1 Mbitk and its fixed priorities-based medium access control limits the maximum bus utilisation when timeliness guarantees are required. An implementation of earliest deadline first (EDF) message scheduling on CAN, based on the F’IT CAN protocol, is presented, which allows higher utilisation factors with timeliness guarantees. The a...

We prove the filling area conjecture in the hyperelliptic case. In particular, we establish the conjecture for all genus 1 fillings of the circle, extending P. Pu’s result in genus 0. We translate the problem into a question about closed ovalless real surfaces. The conjecture then results from a combination of two ingredients. On the one hand, we exploit integral geometric comparison with orbif...

The increasing importance of distributed multimedia applications and the emergence of user interfaces based on digital audio and digital video will soon require that computer communication networks offer real-time services. This paper argues that the feasibility of providing performance guarantees in a wide-area network should be investigated, and describes a possible approach. We present a mod...