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Taming Cross-Technology Interference for Wi-Fi and ZigBee Coexistence Networks

机译:缓解Wi-Fi和ZigBee共存网络的跨技术干扰

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Recent studies show that Wi-Fi interference has been a major problem for low power urban sensing technology ZigBee networks. Existing approaches for dealing with such interferences often modify either the ZigBee nodes or Wi-Fi nodes. However, massive deployment of ZigBee nodes and uncooperative Wi-Fi users call for innovative cross-technology coexistence without intervening legacy systems. In this work, we investigate the Wi-Fi and ZigBee coexistence when ZigBee is the interested signal. Typically, the duration of transmitting a ZigBee data packet is longer than that of a Wi-Fi packet. Mitigating short duration Wi-Fi interference (called ) in long duration ZigBee data (called ) is challenging. To address these challenges, we propose ZIMO: a sink-based MIMO design for harmony coexistence of ZigBee and Wi-Fi networks with the goal of protecting the ZigBee data packets from being interfered by high-power cross-technology signals. The key insight is to properly exploit opportunities resulted from differences between Wi-Fi and ZigBee, and bridge the gap between interested data and cross technology signals. Also, extracting the channel coefficient of Wi-Fi and ZigBee will enhance other coexistence technologies such as TIMO . We implement a prototype in GNURadio-USRP N200, and our extensive evaluations under real wireless conditions show that ZIMO can improve ZigBee network throughput up to 1.9, with 1.5 in media, and 1.1 to 1.9 for Wi-Fi network as byproduct in ZigBee signal recovery.
机译:最近的研究表明,Wi-Fi干扰已成为低功耗城市传感技术ZigBee网络的主要问题。解决此类干扰的现有方法通常会修改ZigBee节点或Wi-Fi节点。但是,ZigBee节点的大规模部署和不合作的Wi-Fi用户要求在不干预传统系统的情况下实现创新的跨技术共存。在这项工作中,当ZigBee是感兴趣的信号时,我们将研究Wi-Fi和ZigBee共存。通常,传输ZigBee数据包的持续时间长于Wi-Fi数据包的持续时间。缓解长时间ZigBee数据(称为)中的短期Wi-Fi干扰(称为)具有挑战性。为了应对这些挑战,我们提出了ZIMO:一种基于接收器的MIMO设计,用于ZigBee和Wi-Fi网络的和谐共存,目的是保护ZigBee数据包不受大功率跨技术信号的干扰。关键见解是正确利用Wi-Fi和ZigBee之间的差异所带来的机遇,并弥合感兴趣的数据与跨技术信号之间的鸿沟。此外,提取Wi-Fi和ZigBee的信道系数将增强TIMO等其他共存技术。我们在GNURadio-USRP N200中实现了原型,在真实无线条件下的广泛评估表明ZIMO可以将ZigBee网络吞吐量提高到1.9,其中媒体为1.5,Wi-Fi网络为1.1至1.9,这是ZigBee信号恢复中的副产品。 。

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