ZCNET: Achieving High Capacity in Low Power Wide Area Networks
ZCNET: Achieving High Capacity in Low Power Wide Area Networks
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DOI：
10.1109/tnet.2022.3158482
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发表时间：
2022-10
期刊：
影响因子：
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通讯作者：
Zhenghao Zhang;Raghav Rathi;Steven Perez;Jumana Bukhari;Yaoguang Zhong
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文献类型：
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作者：
Zhenghao Zhang;Raghav Rathi;Steven Perez;Jumana Bukhari;Yaoguang Zhong
本文提出了一种新的LPWAN技术——ZCNET，它比现有的LoRa、Sigfox和RPMA等解决方案实现了更高的网络容量。ZCNET的产能提升主要有两个原因。首先，ZCNET节点传输的信号占用信号空间的一小部分，导致碰撞概率低。其次，ZCNET通过使用8个Zadoff-Chu （ZC）根序列在单个频率通道内支持8个并行根通道。根信道之间不会产生严重的干扰，主要是因为干扰功率均匀地分布在整个信号空间中。介质访问使用简单的aloha风格协议，节点随机选择根通道及其在根通道内占用的范围。ZCNET已经在USRP和模拟的真实世界实验中进行了广泛的测试，结果证实ZCNET比LoRa， Sigfox和RPMA取得了显著的进步。ZCNET可能会更好地适应物联网网络规模的爆炸式增长，并满足物联网应用的需求。
In this paper, a novel LPWAN technology, ZCNET, is proposed, which achieves significantly higher network capacity than existing solutions, such as LoRa, Sigfox, and RPMA. The capacity boost of ZCNET is mainly due to two reasons. First, a ZCNET node transmits signals that occupy a small fraction of the signal space, resulting in a low collision probability. Second, ZCNET supports 8 parallel root channels within a single frequency channel by using 8 Zadoff-Chu (ZC) root sequences. The root channels do not severely interfere with each other, mainly because the interference power is spread evenly over the entire signal space. A simple ALOHA-style protocol is used for medium access, with which a node randomly chooses the root channel and the range it occupies within the root channel. ZCNET has been extensively tested with both real-world experiments on the USRP and simulations, and the results confirm that ZCNET achieves significant gains over LoRa, Sigfox, and RPMA. ZCNET will likely better accommodate the explosive growth of IoT network sizes and meet the demand of IoT applications.