Design and implementation of network services that provide end-to-end QoS in ATM-based real-time environments

There has been an increasing need of highly predictable, timely, and dependable communication services with QoS guarantees on an end-to-end basis for embedded real-time applications and for multimedia-integrated distributed control. Performance objectives used in conventional networks-such as maximizing the throughput, minimizing the response time, or providing fairness to users-are not of the most important concern for both types of applications. Instead, resources should be appropriately reserved and managed to support quality of service (QoS) on an end-to-end basis, as well as application-specific tradeoffs among them. The main intent of this paper is thus to develop and demonstrate an environment an integrated set of networks resource management techniques, middleware layers, and network software-for supporting QoS on an end-to-end basis in ATM-based distributed real-time environments. We present an analytic QoS framework that incorporates a flow/QoS specification, a QoS translation/negotiation policy, an admission control facility, a route construction scheme, a resource reservation manager, a run-time message scheduler, and a traffic regulator and QoS monitor. Then, sue elaborate on the algorithms and mechanisms to implement these network components. To empirically analyze the interplay among different components, and the performance that results from careful coordination of all the components, we care currently implementing them as middleware layers in the Sun Solaris environment, and will comment in the paper our implementation strategies.