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A dynamic cross-layer control strategy for resource partitioning in a rain faded satellite channel with long-lived TCP connections

机译:动态的跨层控制策略,用于在具有长期TCP连接的雨衰卫星频道中进行资源分配

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摘要

The paper aims at devising a control system for dynamic resource allocation in a packet-oriented satellite network. The traffic to be served is represented by TCP long-lived connections (elephants). A Master Station adaptively assigns bandwidth and transmission parameters (bit and coding rate) to TCP buffers at the earth stations, grouping connections characterized by the same source-destination pair. The assignment is effected according to each pairu27s traffic load and fading conditions, in order to reach a common goal. The latter may consist of maximizing the overall TCP goodput, of equalizing the connectionsu27 goodput for global fairness, or a combination thereof. Thus, there is a cross-layer interaction between the physical and data link layers, whereby fading plays a role in the overall bandwidth allocation, through the tradeoff between bandwidth and Bit Error Rate (BER) of TCP connections. Three different allocation strategies are devised, and their respective performance is compared, under a realistic link budget.
机译:本文旨在设计一种面向分组卫星网络中动态资源分配的控制系统。要服务的流量由TCP长期连接(大象)表示。主站为地球站的TCP缓冲区自适应地分配带宽和传输参数(位和编码率),将以相同源-目的对为特征的连接分组。为了达到共同的目标,分配是根据每对通信量的负载和衰落条件进行的。后者可能包括最大程度地提高总体TCP吞吐量,均衡连接的吞吐量以实现全局公平性,或其组合。因此,物理层和数据链路层之间存在跨层交互,从而衰落通过带宽和TCP连接的误码率(BER)之间的折衷在总体带宽分配中发挥作用。在实际的链路预算下,设计了三种不同的分配策略,并比较了它们各自的性能。

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