Suchitra Raman

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"Soft state" is an often cited yet vague concept in network protocol design in which two or more network entities intercommunicate in a loosely coupled, often anonymous fashion. Researchers often define this concept operationally (if at all) rather than analytically: a source of <i>soft state</i> transmits periodic "refresh messages" over a (lossy)(More)
Images account for a significant and growing fraction of Web downloads. The traditional approach to transporting images uses TCP, which provides a generic reliable, in-order byte-stream abstraction, but which is overly restrictive for image data. We analyze the progression of image quality at the receiver with time and show that the in-order delivery(More)
The Application Level Framing (ALF) protocol architecture 2] encourages application control over mechanisms that traditionally fall within the \transport layer", e.g., loss detection and recovery. Traditional ARQ-based reliable protocols for unicast (e.g., TCP) as well as multicast (e.g., Horus 30], RMTP 15], etc.) number data units sequentially to detect(More)
Images account for a significant and growing fraction of Web downloads. The traditional approach to transporting images uses TCP, which provides a generic reliable in-order bytestream abstraction, but which is overly restrictive for image data. We analyze the progression of image quality at the receiver with time, and show that the in-order delivery(More)
The development and deployment of a large-scale, wide-area multicast infrastructure in the Internet has enabled a new family of multi-party, collaborative applications. Several of these applications, such as multimedia slide shows, shared whiteboards, and large-scale multi-player games, require <i>reliable</i> multicast transport, yet the underlying(More)
This paper describes Root Administered Multicast Addressing (RAMA), a protocol for wide-area IP multicast that scales to a large number of simultaneous groups with topologically distant members. RAMA solves the wide-area " rendezvous " problem by making the root of the distribution tree explicit in the multicast group identi-fier. This is done by extending(More)
1. INTRODUCTION Over the past few years, we and others in the network research community h a ve designed , implemented, and deploye d a n umber of applications and application-level protocols for large-scale, multiparty remote-conferencing over the Internet Multi-cast Backbone or MBone Eriksson 19944. In the past incarnation of these MBone tools", a(More)
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