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Theory and experiments show that as the per-flow product of bandwidth and latency increases, TCP becomes inefficient and prone to instability, regardless of the queuing scheme. This failing becomes increasingly important as the Internet evolves to incorporate very high-bandwidth optical links and more large-delay satellite links.To address this problem, we(More)
We consider power and server allocation in a multibeam satellite downlink which transmits data to <i>N</i> different ground locations over <i>N</i> time-varying channels. Packets destined for each ground location are stored in separate queues and the server rate for each queue <i>i</i> depends on the power <i>p<sub>i</sub></i> (<i>t</i>) allocated to that(More)
This paper examines the robustness properties of existing adaptive control algorithms to unmodeled plant high-frequency dynamics and unmeasurable output disturbances. It is demonstrated that there exist two infinite-gain operators in the nonlinear dynamic system which determines the time-evolution of output and parameter errors. The pragmatic implication of(More)
Wireless vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication holds great promise for significantly reducing the human and financial costs of vehicle collisions. A common characteristic of this communication is the broadcast of a device's core state information at regular intervals (e.g. a vehicle's speed and location, or a traffic(More)
1. INTRODUCTION This paper reports the outcome of an exhaustive analyt-Due to space limitations we cannot possibly provide in ical and numerical investigation of stability and ro-this paper analytical and simulation evidence of all bustness properties of a wide class of adaptive control conclusions outlined in the abstract. Rather, we algorithms in the(More)