CASIA OpenIR  > 毕业生  > 博士学位论文
水下传感器网络节点设计与链路控制方法研究
Alternative TitleResearch on Node Design and Media Access Control for Underwater Wireless Sensor Networks
吕超
Subtype工学博士
Thesis Advisor谭民 ; 王硕
2009-05-25
Degree Grantor中国科学院研究生院
Place of Conferral中国科学院自动化研究所
Degree Discipline控制理论与控制工程
Keyword水下传感器网络 水声通信 媒体接入控制 时间同步 系统体系结构 Underwater Wireless Sensor Networks Underwater Acoustic Communication Media Access Control Time Synchronization System Architecture
Abstract水下传感器网络系统集成了无线传感器网络与水下机器人技术的优势,为解决水环境监测、水下探测等领域面临的监测数据有效实时回收问题提供了新思路。但是,水声通信的诸多限制使得许多陆地无线传感器网络的研究成果无法直接应用到水下环境,使水下传感器网络的研究面临更多挑战。本文在国家自然科学基金重点项目“水下移动传感器网络关键技术研究”的支持下,针对水下传感器网络中水下节点装置设计、时间同步方法、链路控制方法及水下传感器网络平台设计等四个关键问题展开研究。具体的研究内容包括以下四个方面: 1. 设计并实现了一种低成本、低功耗和高效率的水下传感器网络节点装置,为水下传感器网络的研究提供了物理层的解决方案。低成本、低功耗的水下通信方式的实现是水下传感器网络研究与应用中的瓶颈问题之一,该节点装置可以有效解决该问题,集成了水声通信、节点间距离测量、水下信息检测等功能,具有电源管理、监测事件实时响应、系统方便扩展等特点。 2. 结合水声通信的长延迟、低速率等特性,提出了一种基于循环收敛的水下传感器网络时间同步方法,为进一步研究水下传感器网络链路的分配与复用打下了良好的基础。该方法能够对水声通信中的主要时延进行估计和补偿,以降低节点间的同步误差;并通过循环收敛等方法减小节点间时延估计误差在多跳网络中的累积效应。 3. 针对传统的时分多路复用技术在水下传感器网络中的应用存在效率低、扩展性差等问题,提出了一种基于模板匹配的水下传感器网络链路控制方法,为水下传感器网络链路层协议的研究提供了主要的解决方案。在UA-MAC设计过程中,对影响节点间往返时间的主要因素进行了分析和讨论,并采用染色理论分析了节点时间帧大小的估计方法,为信道利用率和网络吞吐量的提高提供了重要参考。采用模板匹配策略设计水下传感器网络的信道分配与复用方法,在兼顾节点计算资源有限的条件下,较好地解决了水声信道的冲突问题。 4. 采用水下网络、水面转发网络及系统监控与信息管理服务器三层架构,设计并实现了一个水下传感器网络实验平台。通过水下节点的动态组网,实现了水下环境信息的监测与收集;由水面转发节点和系统监控与信息管理服务器通过无线通信形成水面转发网络,完成了水下网络数据的中转;针对系统监控与信息管理服务器的需求开发了具有网络管理、数据分析及人机界面交互等功能的监控与管理软件,实现了水下网络感知信息的统计与分析。 综上所述,本文对水下传感器网络进行了较系统的研究,设计并实现了一个水下传感器网络的系统原型,为进一步深入研究水下移动传感器网络的拓扑控制、定位和导航方法等奠定了基础。
Other AbstractThe underwater wireless sensor networks integrating the techniques of wireless sensor networks and underwater robots presents a good idea for overcoming the difficulties in such applications as underwater monitoring and exploring, marine navigation. However, the limitations of underwater acoustic communication make it unpractical to employ some research results directly from terrestrial wireless sensor networks, which bring more challenges for the research of UWSN. Supported by the key project of NSFC (National Science Foundation of China), this paper focuses on four important problems including node design, time synchronization method, media access control, and system integration of an UWSN experimental platform. And the research work are introduced in detail as below. 1. An underwater low cost low power sensor node is designed and realized, which presents a solution for the realization of UWSN physical layer. The node integrates the functions of underwater acoustic communication, ranging among the nodes and underwater environments sensing. And, the node also has excellent performances, such as efficient power utilization, good scalability, and real-time responses for urgent events. 2. A time synchronization method based on loop-convergence is presented for underwater acoustic communication with long propagation delay and low data rate. In the proposed method, several main kinds of time delay in underwater acoustic communication are compensated firstly to decrease the synchronization errors between the nodes, and then a loop-convergence strategy is designed to decrease the cumulate errors caused by multi-hop transmission. 3. the traditional TDMA Media Access Control in UWSN has been proved to be a feasible solution with such weaknesses as low channel utilization, bad scalability. So an improved TDMA MAC is presented based on template matching, which gives a solution for UWSN link layer. In the MAC design, the factors affecting round trip time are analyzed and discussed, and coloring theory is employed to estimate the size of time frame. All these analyses are helpful to improve the channel utilization and the network througthput. Considering the underwater sensor nodes` limited resources, a template matching method is designed to fulfill the channel reassignment process, and it also decreases the channel collisions of the intersection nodes. 4. An UWSN platform is developed, which has a framework with three layers: an underwater network, a transmissio...
shelfnumXWLW1347
Other Identifier200618014628008
Language中文
Document Type学位论文
Identifierhttp://ir.ia.ac.cn/handle/173211/6157
Collection毕业生_博士学位论文
Recommended Citation
GB/T 7714
吕超. 水下传感器网络节点设计与链路控制方法研究[D]. 中国科学院自动化研究所. 中国科学院研究生院,2009.
Files in This Item:
File Name/Size DocType Version Access License
CASIA_20061801462800(4470KB) 暂不开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[吕超]'s Articles
Baidu academic
Similar articles in Baidu academic
[吕超]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[吕超]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.