Remotely powered sensor network over CATV infrastructure

Young Cheol Kim, I. Choi, B. Yun, Hyun Deok Kim
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Abstract

The CATV infrastructure has been deployed in most houses and buildings and the coaxial cables of the CATV infrastructure usually can provide sufficient bandwidth to accommodate other services as well as CATV service. We have proposed and demonstrated a novel remotely powered sensor network over the existing CATV infrastructure composed of coaxial cables, splitters and so on. The proposed sensor network has been implemented by using the wasted bandwidth of the coaxial cable (VHF and UHF bands) of the conventional CATV network without any change of the existing infrastructure. Furthermore, it supports a convenient remote power feeding from a central node to end nodes (sensor nodes) by using coaxial cable. We have developed transceiver for the wired sensor network matched the characteristics impedance of the coaxial cable of the CATV network. We also have developed protocol stack of the transceiver to interface with wired cable instead of air and to support the remote power feeding to the end nodes. We have confirmed the performance of the proposed sensor network by measuring the packet error rate (PER) for various data rates when the end nodes were remotely powered. The maximum transmission distance between the central node and the end node of the wired CATV network was about 265 m when the 128 sensor nodes were joined the network at the operating data rate of 250 kb/s.
远程供电传感器网络在有线电视基础设施
有线电视基础设施已经部署在大多数住宅和建筑物中,有线电视基础设施的同轴电缆通常可以提供足够的带宽,以容纳其他业务和有线电视业务。我们提出并演示了一种基于现有有线电视基础设施的新型远程供电传感器网络,该网络由同轴电缆、分路器等组成。该传感器网络是在不改变现有基础设施的情况下,利用传统有线电视网络中同轴电缆(VHF和UHF频段)的浪费带宽实现的。此外,它还支持通过同轴电缆方便地从中心节点远程馈电到终端节点(传感器节点)。根据有线电视网络同轴电缆的阻抗特性,研制了有线传感器网络收发器。我们还开发了收发器的协议栈,以有线电缆代替空气接口,并支持远程电源馈送到终端节点。当终端节点远程供电时,我们通过测量各种数据速率的数据包错误率(PER)来确认所提出的传感器网络的性能。当128个传感器节点以250 kb/s的运行数据速率接入有线有线电视网络时,网络中心节点与终端节点之间的最大传输距离约为265 m。
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