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White Papers
Overview of Rivulet's Dynamic Synchronization Technology [PDF]
From the outset, the earliest Internet protocol (IP) packet networks, which primarily carried large amounts of data among a relatively small number of university research and government nodes, were designed for "best-effort" traffic. As these networks grew and capabilities became amenable to commercial usage (web browsing was a major stimulus), it was natural that expectations of carrying a wider breadth of applications would similarly expand.
The Interrelationship of Forward Error Correction [PDF]
The transmission of interactive IP video imposes particularly demanding requirements among the suite of other highquality, real-time, multimedia applications. In particular, the former requires low delay and jitter, and is especially sensitive to packet loss. Consequently, interactive IP video is best suited to "hard QoS" approaches - rather than the relative levels of QoS achieved using traditional traffic prioritization techniques. In recent years, research and ensuing standards activities have largely focused on forward error correction as the preferred solution.
Multiprotocol Label Switching [PDF]
Multiprotocol Label Switching (MPLS) is gaining widespread recognition as a traffic aggregation technology in the core of Internet Packet (IP) networks. When used to carry IP packets, it affords a framework for virtual private networks, and can interwork with Differentiated Services (DiffServ) as a framework for supporting some improvement in Quality of Service (QoS). However, MPLS, alone, cannot guarantee continuous QoS levels needed to support real-time applications (or applications that require correct delivery the first time - every time), for which performance must be comparable to dedicated networks.
Technology Briefs
MPLS and Rivulet's Dynamic Synchronization Technology TM (DST) [PDF]
As with queuing mechanisms present in router IP code, MPLS offers various tools that can help address delay, jitter and packet loss, but MPLS does not have tools to eliminate loss or bound jitter. MPLS in of itself does not address the fundamental problem of router queue overflow. Unlike MPLS, Dynamic Synchronization TechnologyTM (DST) eliminates packet loss and bounds jitter by solving the fundamental problem of router queue overflow.
Case Studies
Memorial Sloan-Kettering Cancer Center [PDF]
Memorial Sloan-Kettering Cancer Center (MSKCC), the #1 U.S. cancer hospital according to U.S. News and World Report, is committed to exceptional patient care, leading-edge research, and superb educational programs. The Center set a goal to vastly improve all three aspects of its mission using high-definition medical video from its new surgical suites.
New York University Medical Center [PDF]
New York University Medical Center (NYUMC) was struggling to reconcile two goals that were initially in conflict. A primary goal was to improve the quality of physician training and classroom education, conferences and symposia, and clinical consultation using real-time highdefinition medical video.
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