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首页> 外文期刊>IEEE transactions on mobile computing >Maximizing Transmission Opportunities in Wireless Multihop Networks
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Maximizing Transmission Opportunities in Wireless Multihop Networks

机译：在无线多跳网络中最大化传输机会

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Being readily available in most of 802.11 radios, multirate capability appears to be useful as WiFi networks are getting more prevalent and crowded. More specifically, it would be helpful in high-density scenarios because internode distance is short enough to employ high data rates. However, communication at high data rates mandates a large number of hops for a given node pair in a multihop network and thus, can easily be depreciated as per-hop overhead at several layers of network protocol is aggregated over the increased number of hops. This paper presents a novel multihop, multirate adaptation mechanism, called multihop transmission opportunity (MTOP), that allows a frame to be forwarded a number of hops consecutively to minimize the MAC-layer overhead between hops. This seemingly collision-prone nonstop forwarding is proved to be safe via analysis and USRP/GNU Radio-based experiment in this paper. The idea of MTOP is in clear contrast to the conventional opportunistic transmission mechanism, known as TXOP, where a node transmits multiple frames back-to-back when it gets an opportunity in a single-hop WLAN. We conducted an extensive simulation study via OPNET, demonstrating the performance advantage of MTOP under a wide range of network scenarios.
机译：随着Wi-Fi网络变得越来越普遍和拥挤，多速率功能在大多数802.11无线电中已经很容易获得，它似乎很有用。更具体地说，这在高密度情况下将很有用，因为节点间距离足够短，可以采用高数据速率。但是，高数据速率的通信要求多跳网络中给定节点对具有大量跳数，因此，由于在增加的跳数上聚合了多层网络协议的每跳开销，因此很容易折旧。本文提出了一种新颖的多跳，多速率自适应机制，称为多跳传输机会（MTOP），该机制允许将帧连续转发多个跳，以使跳之间的MAC层开销最小。通过分析和基于USRP / GNU Radio的实验证明了这种看似容易发生冲突的不间断转发是安全的。 MTOP的思想与传统的机会传输机制（称为TXOP）形成鲜明对比，在传统的机会传输机制中，节点在单跳WLAN中有机会时会背对背传输多个帧。我们通过OPNET进行了广泛的仿真研究，证明了MTOP在各种网络场景下的性能优势。

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