User-level real-time network system on Real-Time Mach

The paper presents the design and implementation of a user level real time network system in Real-Time Mach. Traditional network systems, which tend to focus on high performance and flexibility, are not suitable for real time communication. Our network system provides a framework for implementing real time network protocols which are able to bound end to end delay and throughput. We especially focus on the aspects to avoid the priority inversion problem in order to make network systems more preemptable and predictable. We also describe the feasibility of our network system for building distributed multimedia systems.