Delivery of time-critical messages using a multiple copy approach
ACM Transactions on Computer Systems (TOCS)
Simulation study of the capacity effects of dispersity routing for fault tolerant realtime channels
Conference proceedings on Applications, technologies, architectures, and protocols for computer communications
Fast restoration of real-time communication service from component failures in multi-hop networks
SIGCOMM '97 Proceedings of the ACM SIGCOMM '97 conference on Applications, technologies, architectures, and protocols for computer communication
Distributed Route Selection for Establishing Real-Time Channels
IEEE Transactions on Parallel and Distributed Systems
Real-Time Communication in Multihop Networks
IEEE Transactions on Parallel and Distributed Systems
Reliability and Performability Modeling Using SHARPE 2000
TOOLS '00 Proceedings of the 11th International Conference on Computer Performance Evaluation: Modelling Techniques and Tools
Skip-Over: algorithms and complexity for overloaded systems that allow skips
RTSS '95 Proceedings of the 16th IEEE Real-Time Systems Symposium
Exploiting skips in periodic tasks for enhancing aperiodic responsiveness
RTSS '97 Proceedings of the 18th IEEE Real-Time Systems Symposium
Elastic Task Model for Adaptive Rate Control
RTSS '98 Proceedings of the IEEE Real-Time Systems Symposium
A Scalable Solution to the Multi-Resource QoS Problem
RTSS '99 Proceedings of the 20th IEEE Real-Time Systems Symposium
Fast low-cost failure recovery for real-time communication in multi-hop networks
Fast low-cost failure recovery for real-time communication in multi-hop networks
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 2
On providing elastic QoS in optical burst switched networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Dependability metrics
Trading availability among shared-protected dynamic connections in WDM networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Admission control with elastic QoS for video on demand systems
International Journal of Automation and Computing
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Abstract: When a client requests a real-time connection that requires an excessive amount of resources and/or a very high level of QoS (Quality-of-Service), the network service provider may have to reject the request, and in such case, only a small number of connections could be accepted. On the other hand, if the client, out of fear of the service provider's rejection, requests only the minimum level of QoS, s/he may receive only bare-bone service even when there are plenty of resources available. One way of utilizing resources efficiently is to specify flexible (elastic) QoS requirements that can be adapted to the availability of network resources. Recently, Han and Shin [1] proposed to allocate one primary channel and one or more backup channels to each dependable real-time (DR-) connection. One drawback of this scheme is the severe reduction in number of DR-connections that can be accommodated, due mainly to the need for reserving resources for backups. This is equivalent to wasting precious resources in the absence of faults as far as the system's ability of accepting DR-connections is concerned. Using elastic QoS for this dependable real-time communication service, one can accept substantially more DR-connections and improve the utilization of resources efficiently and significantly. In this paper, we analyze the dependable real-time communication service with elastic QoS. Fault-tolerance is achieved by allocating one backup channel to each DR-connection. A Markov model is developed and used to analyze the average QoS level allotted to the primary channel of each DR-connection. Our evaluation results show that the proposed Markov model accurately represents the behavior of DR-connections with elastic QoS.