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POLYPHONY: Scheduling-Free Cooperative Signal Recovery in Enterprise Wireless Networks

机译:POLYPHONY:企业无线网络中的无调度协作信号恢复

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Recent years have seen major innovations in cooperative wireless networks. Despite the fact that throughput gains have been achieved in packet recovery, hardly any of these technologies could effectively decode signals when the number of signal sources is greater than available antennas in each AP. Thus, conventional cooperative methods rely on adaptive scheduling for interference-free data packets. Deploying scheduling-free cooperative signal recovery requires prompt processing with low overheads. Yet potentially, the concurrent client transmissions could overwhelm any single AP, i.e., the number of concurrent transmissions are more than that of antennas. This paper presents the first step towards breaking this stalemate, by enabling symbol alignment and constellation reinforcement instead of relying on scheduling. We present POLYPHONY, a scheduling-free cooperative design, where decoding process could be coordinated without over-the-air scheduling, and coupled signals are decoded promptly after deep cooperations. We implement POLYPHONY prototype with GNURadio/USRP platform, and deploy it with a 16-node enterprise network. Particularly, we demonstrate how it manages the complex interactions with scheduling-free signal enforcement, and enables a beyond node-DoF (Degree of Freedom) decoding with AP coordinations. Furthermore, we show how the cooperative decoding process improves radio access among clients. Our results demonstrate a gain of nearly 200 percent for network throughput, which is a significant improvement for heavy contending networks.
机译:近年来,在协作无线网络中看到了重大创新。尽管在数据包恢复中已经实现了吞吐量的增长,但是当信号源的数量大于每个AP中可用的天线时,这些技术中几乎没有一种可以有效地解码信号。因此,常规的协作方法依赖于针对无干扰数据分组的自适应调度。部署免调度的协作信号恢复需要以低开销进行迅速处理。然而潜在地,并发客户端传输可能使任何单个AP不堪重负,即,并发传输的数量大于天线的数量。本文提出了通过打破符号僵局的第一步,它实现了符号对齐和星座增强,而不是依赖调度。我们提出了POLYPHONY,这是一种无调度的协作设计,在无需无线调度的情况下就可以协调解码过程,并且在深层合作之后可以迅速对耦合信号进行解码。我们使用GNURadio / USRP平台实现POLYPHONY原型,并在16节点企业网络中进行部署。特别是,我们演示了它如何利用免调度信号实施来管理复杂的交互,并通过AP协调实现了超出节点的DoF(自由度)解码。此外,我们展示了协作解码过程如何改善客户端之间的无线电访问。我们的结果表明,网络吞吐量提高了近200%,对于竞争激烈的网络而言,这是一个显着的提高。

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