基于数据并发传输的频谱感知系统的研究

发布时间：2018-03-08 00:04

本文选题：并发处理　切入点：数据转发　出处：《北京邮电大学》2014年硕士论文　论文类型：学位论文

【摘要】：通信技术的不断发展以及软件无线电技术的日益普及致使频谱成为了一种很稀缺的资源,我们对这种稀缺的频谱信息资源的需求越来越多,对频谱信息进行感知的任务越来越重。互联网技术和数据库技术为频谱信息的感知提供了一个很好的平台,大量分散式分布的传感器通过网络的传输将这些数据存入特定的数据中心,为频谱信息的感知提供了很好的条件的同时也带来了很多技术方面的考验。“基于数据并发传输的频谱感知的研究”的目标是在满足当前大量分散式分布的传感器准确接收消息的同时,有效解决服务器由于本身性能而在处理并发连接时引发的延迟和连接丢失问题,并还原数据,以得到良好的数据展示。本文通过对现有网络相对成熟的服务器架构模型以及并发处理技术的研究,结合当前服务器结构的特性,设计并实现了一种基于数据并发传输的频谱感知系统。通过功能模块划分将系统划分为用户注册、用户认证、并发处理、转发识别处理、数据还原、数据存储、数据压缩以及界面展示八部分,通过模块化的方式完成系统功能并完成系统功能和性能方面的测试,将一定的用户信息通过Web页面展示。本文针对各个模块的功能需求,取得了以下研究成果： 1、并发处理模块：使用完成端口技术解决了并发延迟问题,有效解决大量线程间切换所引起的系统开销过大的问题。 2、转发识别处理模块：多对多服务器中,服务器需将用户请求准确发送到某一传感器上,同时传感器或数据库信息虚准确转发到信息请求来源。 3、数据还原模块：通过相应解密算法将接收的二进制数据进行还原,分别得到扫描频谱信息原始数据和单点频谱信息原始数据。 4、数据存储模块：将解码后的数据分布式存储在ORACLE数据库中,以便日后查询访问。 5、数据压缩模块：压缩模块通过Zlib技术来完成,压缩后的数据在传输的过程中减少了带宽的占用,同时减缓了服务器的压力。 6、界面展示模块：界面展示模块是通过Web界面的和Android界面的形式展示用户数据库中信息,以实时频谱图的形式显示所感知到的数据。
[Abstract]:With the continuous development of communication technology and the increasing popularity of software radio technology, the spectrum has become a very scarce resource, and we need more and more of this scarce spectrum information resources. The task of sensing spectrum information is becoming more and more important. Internet technology and database technology provide a good platform for spectrum information perception. A large number of distributed sensors store the data in a particular data center through the transmission of the network. It not only provides a good condition for spectrum information perception, but also brings a lot of technical tests. The goal of the research on spectrum sensing based on concurrent transmission of data is to satisfy a large number of distributed sensors. While receiving messages accurately, The problem of delay and connection loss caused by the processing of concurrent connection by the server due to its own performance is effectively solved, and the data is restored to get a good data display. In this paper, the relative mature network server architecture model and concurrent processing technology are studied, combined with the characteristics of the current server structure. A spectrum sensing system based on concurrent data transmission is designed and implemented. The system is divided into user registration, user authentication, concurrent processing, forwarding and identification processing, data restoration, data storage through the partition of function modules. Data compression and interface display eight parts, through modularization way to complete the system function and complete the system function and performance test, a certain user information through the Web page display. In this paper, according to the functional requirements of each module, the following research results have been achieved:. 1. Concurrency processing module: the completion port technology is used to solve the problem of concurrent delay, which effectively solves the problem of excessive system overhead caused by a large number of threads switching. 2, forwarding identification processing module: in many-to-many servers, the server needs to send the user request to a sensor accurately, and the sensor or database information should be forwarded to the source of the information request. 3, data restoration module: the binary data received is restored by the corresponding decryption algorithm, and the original data of scanning spectrum information and single point spectrum information are obtained respectively. 4, data storage module: the decoded data is distributed stored in ORACLE database for later query and access. 5, data compression module: the compression module is completed by Zlib technology, the compressed data in the transmission process reduces the bandwidth occupation, at the same time reduces the pressure of the server. 6. Interface display module: the interface display module displays the information in the user database through the form of Web interface and Android interface, and displays the perceived data in the form of real-time spectrum chart.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925

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