An underwater communication network to remote subsea platforms

到远程海底平台的水下通信网络

• 批准号: 535778-2018
• 负责人: Bousquet, JeanFrancois
• 金额: $ 1.41万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=677044
• 关键词: underwater; communication; network; remote; subsea

The aim of this project is to provide remote access to underwater sensors deployed for detection of subsea activity through the development of a distributed communication network. To avoid eavesdropping and access of data from intruders, covert transmission between the nodes is required. Also, to avoid a surface expression (for example a buoy) that is easily detected, a gateway buried a few meters below the sea surface will serve to establish a link with a mobile platform above the sea surface.The subsea network will rely primarily on acoustic propagation to exchange and relay information between the underwater nodes. To extend the range, different network topologies will be studied and a communication protocol will be defined to allow deployment of self-powered nodes for missions that can span several months. The messages will be broken up using short burst to share the network resources among multiple nodes. Also, adaptive modulation techniques that rely on a diverse set of frequency tones will reduce the probability of intercept. Using these modulation techniques, the users will be provided unique signatures that are spread over a wide bandwidth, and constrained by the hardware requirements available on submarine vessels. Specific coding techniques will be used to encrypt the message, and allow a secured and private link. To forward the data from below the sea surface to a surface vessel, a short-range relay link will be established that crosses the air-water interface. A communication link relying on magnetic induction (MI) will be proposed for this purpose. Although MI has traditionally been used as a short range link on the order of ten meters for diver-to-diver communication, in this work MI will be used at the air-water interface, and the possibility of achieving a few hundred meters will be explored. For this, a priori, an analytical model of the behaviour of the electro-magnetic fields, as it crosses the air-water boundary will be developed. A reconfigurable radio will be used to optimize the capacity of the link, as the distance between the nodes is varied. At the end of the project, the network will be deployed at sea.

该项目的目的是通过开发分布式通信网络来远程访问用于检测海底活动的水下传感器。为了避免窃听和从入侵者访问数据，需要在节点之间进行秘密传输。此外，为避免易于检测到的表面表达（例如浮标），掩埋在海面以下几米的门户将用于与海面上方的移动平台建立链接。海底网络将主要依赖在水下节点之间交换和继电器信息的声音传播。 为了扩展范围，将研究不同的网络拓扑，并将定义通信协议，以允许部署可以跨越几个月的任务的自动节点。 这些消息将使用短爆发分解，以在多个节点之间共享网络资源。 同样，依赖各种频率音调的自适应调制技术将降低截距的可能性。使用这些调制技术，将提供用户的独特签名，这些签名分布在宽带宽度上，并受到潜艇船上可用的硬件要求的约束。 特定的编码技术将用于加密消息，并允许有安全的私有链接。 为了将数据从海面下方转发到表面容器，将建立一个跨空气水接口的短距离继电器链路。 为此，将提出依赖磁性感应（MI）的通信链接。 尽管传统上，MI被用作10米的距离沟通订单的短距离链接，但在这项工作中，MI将在空气水接口处使用，并且可以实现几百米的可能性探索。 为此，将开发出横断空气水边界的电子磁场行为的先验模型。 随着节点之间的距离变化，可重新配置的无线电将用于优化链接的容量。在项目结束时，网络将在海上部署。