Zhenghua Fu

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— This paper studies TCP performance over multihop wireless networks that use the IEEE 802.11 protocol as the access method. Our analysis and simulations show that, given a specific network topology and flow patterns, there exists a TCP window size Ï £ , at which TCP achieves best throughput via improved spatial channel reuse. However, TCP does not operate(More)
—Transport protocol design for supporting multimedia streaming in mobile ad hoc networks is challenging because of unique issues, including mobility-induced disconnection, recon-nection, and high out-of-order delivery ratios; channel errors and network congestion. In this paper, we describe the design and implementation of a transmission control protocol(More)
This paper studies TCP performance in a stationary multihop wireless network using IEEE 802.11 for channel access control. We first show that given a specific network topology and flow patterns, there exists a window size W * at which TCP achieves the highest throughput via maximum spatial reuse of the shared wireless channel. However, TCP grows its window(More)
Transport protocol design for mobile ad hoc networks is challenging because of unique issues, including mobility-induced disconnection, reconnection, and high out-of-order delivery ratios; channel errors; and network congestion. In this work, we describe the design and implementation of a TCP-friendly transport protocol for ad hoc networks. Our key design(More)
1. MOTIVATION The evolving global information infrastructure consists of a wide-area networking backbone that provides connectivity among service providers and clients requesting multimedia services via different applications. As this infrastructure scales, service providers replicate data and resources on the network to serve more concurrent clients.(More)
abstract Cost-effectively collecting distributed state information is a challenging problem. It perhaps has no single perfect answer since different distributed application environments pose different requirements from the information collection process. In any case, knowledge of the environment, in terms of traffic models, load models etc. play a key role(More)
— As an efficient distribution mechanism, peer-to-peer technology has become a tremendously attractive solution to offload servers in large scale video streaming applications. However, in providing on-demand asynchronous streaming services , P2P streaming design faces two major challenges: how to schedule efficient video sharing between peers with(More)
In this paper, we present and evaluate algorithms to address combined path and server selection (CPSS) problems in highly dynamic multimedia environments. Our goal is to ensure effective utilization of network and server resources while tolerating imprecision in system state information. Components within the framework implement the optimized scheduling(More)
—As an efficient distribution mechanism, Peer-to-Peer (P2P) technology has become a tremendously attractive solution to offload servers in large-scale video streaming applications. However, in providing on-demand asynchronous streaming services , P2P streaming design faces two major challenges: how to schedule efficient video sharing between peers with(More)