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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)
represents the rate of traffic originating at nodë and destined for node ©. A joint routing and power allocation policy is developed which stabilizes the system and provides bounded average delay guarantees whenever the input rates are within this capacity region. Such performance holds for general arrival and channel state processes, even if these(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)
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)
i depends on the power p i (t) allocated to that server and the channel state c i (t) according to a concave rate-power curve µ i (p i , c i). We establish the capacity region of all arrival rate vectors (λ 1 ,...,λ N) which admit a stabilizable system. For the case when channel states and arrivals are iid from timeslot to timeslot, we develop a particular(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)
In a network, multiple links are interconnected by means of switches. A switch is a device with multiple input and output links, and its job is to move data from the input links to the output links. In this thesis, we focus on a number of fundamental issues concerning the quality of service provided by electronic and optical switches. We discuss various(More)