Bruce A. Mah

The Tenet real-time protocol suite: design, implementation, and experiences

Many future applications will require guarantees on network performance, such as bounds on throughput, delay, delay jitter, and reliability. To address this need, the authors have designed, simulated, and implemented a suite of network protocols to support real-time channels (network connections with mathematically provable performance guarantees). The protocols, which constitute the prototype Tenet real-time protocol suite (Suite 1), run on a packet-switching internetwork and can coexist with the popular Internet protocol suite. The authors rely on the use of connection-oriented communication, per-channel admission control, channel rate control, and priority scheduling. This protocol suite is the first set of transport and network-layer communication protocols that can transfer real-time streams with guaranteed quality in packet-switching internetworks. The authors have performed a number of experiments and demonstrations on multiple platforms using continuous-media loads (particularly video). The results show that the approach is both feasible and practical to build, and that it can successfully provide performance guarantees to real-time applications. The paper describes the design and implementation of, the suite, the experiments performed, and some of the lessons learned.

Providing network video service to mobile clients

Mobile computing and multimedia are two emerging trends in computer systems. One foreseeable application suggested by these two trends is the playback of stored video on both mobile devices and conventional workstations. A system supporting such an application must provide performance-guaranteed delivery of video data to different types of clients, some of which may be mobile. In this paper, we address some of the issues involved in supporting such an application, namely the efficient layout of multiple representations of video data on a file server and network support for host mobility.<<ETX>>