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Performance Modeling of a Bottleneck Node in an IEEE 802.11 Ad-Hoc Network

机译：IEEE 802.11 Ad-hoc网络中瓶颈节点的性能建模

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摘要

The ieee 802.11 mac-protocol, often used in ad-hoc networks, has the tendency to share the capacity equally amongst the active nodes, irrespective of their loads. An inherent drawback of this fair-sharing policy is that a node that serves as a relay-node for multiple flows is likely to become a bottleneck. This paper proposes a flow-level performance model of such a bottleneck node using fluid-flow analysis. Assuming Poisson initiations of new flow transfers at the bottleneck node, we obtain insightful, robust, and explicit expressions for characteristics related to the overall flow transfer time, the buffer occupancy, and the packet delay at the bottleneck node. The analysis is enabled by a translation of the behavior of the bottleneck node and the source nodes in terms of an m/g/1 queueing model. We conclude the paper by an assessment of the impact of alternative capacity sharing amongst source nodes and the bottleneck in order to improve the performance of the bottleneck.
机译：通常在Ad-hoc网络中使用的IEEE 802.11 MAC协议，无论其负载如何，都具有在活动节点中平等地共享容量。该公平共享策略的固有缺点是作为多个流量的中继节点用作中继节点的节点可能成为瓶颈。本文采用了使用流体流分析的这种瓶颈节点的流量级性能模型。假设宠物线圈节点的新流量转移的泊松发动机，我们获得了与瓶颈节点上的整体流动传输时间，缓冲区占用和数据包延迟相关的特征的富有识别，鲁棒和显式表达式。通过在M / G / 1排队模型方面，通过瓶颈节点的行为和源节点的平移来实现分析。我们通过评估源节点之间的替代能力共享和瓶颈的影响来结束论文，以提高瓶颈的表现。

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