This memo discusses a proposed extension to the Internet architecture and protocols to provide integrated services, i.e., to support realtime as well as the current non-real-time service of IP. This extension is necessary to meet the growing need for real-time service for a variety of new applications, including teleconferencing, remote seminars, telescience, and distributed simulation. This me...

Integrated r egional networks provide an infrastructure for the deployment of accountable, accessible, and secure teleconsultation services. In addition, the use of clinical protocols, combined with the automated retrieval of relevant health data, can improve the effectiveness and efficiency of teleconsultation sessions. In the context of HYGEIAnet, the regional health telematics network of Cre...

Integrated services networks integrate wide variety of services, such as voices, video, and data, onto a common infrastructure. There are however major obstacles to overcome, since different services not only have drastically different traffic characteristics, but also extremely diverse Quality of Service (QoS) requirements expressed in terms of delay, jitter, throughput and loss rate. An impor...

The Internet Integrated Services (IIS) architecturee3] has a fundamental scaling problem in that per ow state is maintained at all routers and end-systems supporting a ow. This paper examines the use of aggregation as a technique to reduce the amount of state needed to provide IIS. In our approach, routers at the edge of a region doing aggregation keep detailed IIS state, while in the interior ...

The Broadband Integrated Services Digital Network (B-ISDN) is expected to be the public communications network of the future. One of the prime factors influencing the development of such a network is the emergence of a large number of teleservices with different requirements (sometimes still unknown). However, a common requirement for all these services is the need to be protected against unaut...

Variable bit rate (VBR) video is expected to be a major source of traac for the Broadband Integrated Services Digital Network (B-ISDN). To dimension the network, there is a need to predict the network performance. Traac models are often used as an aid in this process, and many have been proposed as suitable for the modeling of VBR video sources. However, further work is required in the area of ...

Broadband integrated services digital network(B-ISDN) efforts are driven by the emerging needs for high-speed communications and enabling technologies to support new integrated services. Among the available technologies, asynchronous transfer mode (ATM) has emerged as a standard for supporting B-ISDN. ATM uses short, fixed-size cells consisting of 48 bytes of payload and 5 bytes of header in or...

INTRODUCTION In Iowa, the geographic distribution of the population makes telemedicine connections an efficient way to deliver tertiary care services to underserved areas. We established “connections” around the State of Iowa using (1) a courier service, (2) Integrated Services Digital Network-Primary Rate Interface (ISDN-PRI) connections operating at 1.54 Mbps, and (3) DS3 links operating at 4...