Quality of Service Guarantees in High Speed Networks A Research Project Funded by the National Science Foundation
Principal Investigator: R. L. Cruz
Summary of Results
- R. L. Cruz, " Quality of Service Management in Integrated Services Networks," Proceedings of the 1st Semi-Annual Research Review, Center for Wireless Communications, UCSD, June 6, 1996. Abstract (html). Full paper:(3.5M,postscript) (544K, g-zipped postscript).
Service curves were introduced earlier as a convenient framework for management and allocation of end-to-end deterministic quality of service guarantees in virtual circuit switched networks operating with essentially no transmission errors, e.g. ATM networks. A service curve can be thought of as a generalized bandwidth specification, which simultaneously characterizes both latency and throughput guarantees. We generalize the service curve definition with the objective of addressing environments where link layer ARQ protocols are used to overcome random transmission errors. Using the generalized service curve definition, we develop a framework for provision and management of probabilistic end-to-end quality of service guarantees in an integrated services network. We also relax an earlier definition of traffic smoothness, which is convenient for calculation of probabilistic quality of service guarantees.