Wu-chang Feng

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In order to stem the increasing packet loss rates caused by an exponential increase in network traffic, the <sc>ietf</sc> has been considering the deployment of active queue management techniques such as <sc>Red</sc> [14]. While active queue management can potentially reduce packet loss rates in the Internet, we show that current techniques are ineffective(More)
In order to stem the increasing packet loss rates caused by an exponential increase in network traffic, the IETF is considering the deployment of active queue management techniques such as RED [13]. While active queue management can potentially reduce packet loss rates in the Internet, this paper shows that current techniques are ineffective in preventing(More)
This paper describes and evaluates Stochastic Fair Blue(SFB), a novel technique for enforcing fairness among a large number of flows. SFB scalably detects and rate-limits non-responsive flows through the use of a marking probability derived from the BLUE queue management algorithm and a Bloom filter. Using analysis and simulation, SFB is shown to(More)
Video-based sensor networks can provide important visual information in a number of applications including: environmental monitoring, health care, emergency response, and video security. This article describes the Panoptes video-based sensor networking architecture, including its design, implementation, and performance. We describe two video sensor(More)
This paper describes the results of the first comprehensive analysis of a range of popular on-line, multiplayer, game servers. The results show that the traffic behavior of these servers is highly predictable and can be attributed to the fact that current game designs target the saturation of the narrowest, last-mile link. Specifically, in order to maximize(More)
This paper exposes an inherent weakness in current active queue manage ment techniques such as<italic>Red</italic>in that they rely on queue lengths to indicate the severity of congestion. In light of this observation, a fundamentally different active queue management algorithm called<italic>Blue</italic>is proposed.<italic>Blue</italic>uses packet loss and(More)
The transfer of prerecorded, compressed video requires multimedia services to support large uctuations in bandwidth requirements on multiple time scales. Bandwidth smoothing techniques can reduce the burstiness of a variable-bit-rate stream by prefetching data at a series of xed rates, simplifying the allocation of resources in video servers and the(More)
This paper describes the results of a 500 million packet trace of a popular on-line, multi-player, game server. The results show that the traffic behavior of this heavily loaded game server is highly predictable and can be attributed to the fact that current game designs target the <i>saturation of the narrowest, last-mile link</i>. Specifically, in order(More)