第三代移动通信系统TD-SCDMA无线资源管理技术的研究(论文14000字)
摘要
无线传感器网络是由传感器节点设备通过特定的方式构成的无线网络，以此达到对位于覆盖网络区域的对象信息进行协作感知、采集、处理。无线传感器网络技术将物理世界和信息技术结合起来，随着科技不断发展，它的巨大应用价值越发突出显现出来，其应用领域涵盖军事、工业过程、环境监测等。信息采集网络、数据分布网络、任务管理中心三模块构成无线传感器网络，它的主要组成部分是融合了传感器、数据处理单元、通信模块的网络节点。作为通信模块核心部分的无线传感器网关节点在无线传感器网络的重要地位是显而易见的，为满足无线传感器网络对所传感数据要求的周期性和同步性特点，研究不同应用场景下的无线传感器网络网关节点是非常有必要的。为了保证数据实时高效传输，降低节点功耗，同时使得网关的生命周期最大化，新型第三代移动通信技术是一个很好的选择。
3G即第三代移动通信技术，和前面几代主要不同的是:极大的提高数据传输速率，同时通信质量上也有了更好的保证，系统容量进一步扩升，通过OTT业务对移动终端用户提供更多更高级的服务将会变得更加可能。第三代移动通信系统已经成为目前常用的无线数据传输方式，也是物联网中数据传输方式发展的必然趋势。TD-SCDMA，三大 G技术里面的一种，这项3G标准融合了很多国际领先技术是由中国独自制定，它具有低辐射、良好的频谱利用率、对业务支持灵活的特点。随着国家政策的支持，TD产业联盟的建立，TD-SCDMA商业化不断成熟。在这样的形势下研究实现基于TD-SCDMA的嵌入式传感器网络是非常必要的。
本论文在熟悉嵌入式linux操作系统和TCP协议的基础上，首先介绍无线传感器网络的研究背景现状和应用场景，其次简述Linux开发、TCP传输控制协议；接着详细阐述如何实现TD-SCDMA模式的3G传输模块在ARM平台上的移植；进一步完成TD-SCDMA数据通道的构造建立，通过测试分析其传输性能，并与理论值作对比，提出3G通信模块的实用价值；最后将基于TD-SCDMA的3G数据通信模块与传感器网络相融合。
关键词：无线传感器网络；3G；嵌入式；TD-SCDMA
Research on TD-SCDMA radio resource management technology in the third generation mobile communication system
Abstract
Wireless sensor network is a specific way through the wireless network consists of sensor nodes to achieve cooperative sensing equipment, the information object on the overlay network area acquisition, processing technology. Wireless sensor network combines the physical world and the information technology, with the continuous development of science and technology, great value of its application is becoming more and more prominent emerged, the applications include military, industrial process, environmental monitoring and so on. Network information collection, data distribution network, task management center three modules of wireless sensor network, the main part of it is the integration of sensor, data processing unit, network node communication module.For the important position of wireless sensor node gateway communication module in the core part of the wireless sensor network is obviously, in order to meet the needs of wireless sensor networks for periodic and synchronization characteristics of sensor data requirements, wireless sensor network gateway nodes of different application scenarios is necessary. In order to ensure real-time data transmission efficiency, reduce at the same time the gateway node power consumption, the lifetime maximization model, the third generation mobile communication technology is a good choice.
3G is the third generation of mobile communication technology, and previous generations of the main difference is: to improve data transmission speed greatly, and communication quality ensure a better system capacity to further expand rise, through the OTT business to provide more advanced services to mobile users will become more likely. The third generation mobile communication the system has become one of the most commonly used way of wireless data transmission,.TD-SCDMA is also the inevitable trend of the development of the Internet of things in the way of data transmission, a three G technology, the 3G standard of the integration of many international leading technology is composed of Chinese alone formulation, it has low radiation, goodThe spectrum utilization of business support and flexible features. With the support of national policy, the establishment of TD industry alliance, TD-SCDMA business continues to mature. In such a situation on the implementation of embedded sensor network based on TD-SCDMA is very necessary.
This paper is based on the familiar embedded Linux operating system and TCP protocol, introduces the research background and application scenarios of wireless sensor networks, the second development of Linux, the TCP transmission control protocol; then describes how to realize the transplantation of 3G transmission module of TD-SCDMA model on the ARM platform; further constructed TD-SCDMA data channel establishment analysis of the transmission performance, through the test, and compared with the theoretical value, the practical value of 3G communication module; finally, based on TD-SCDMA 3G data communication module and sensor network.Fusion.
Key words: wireless sensor network; 3G; embedded; TD-SCDMA
目录
1 绪论 1
1.1研究背景和研究意义 1
1.2第三代通信系统的介绍 1
1.3国内外研究现状及分析 3
1.3.1国外在该方向的发展现状和分析 3
1.3.2国内在该方向的发展现状和分析 4
2 TD-SCDMA简述 4
2.1 TD-SCDMA基本特点 4
2.2 TD-SCDMA关键技术 6
2.2.1时分双工 6
2.2.2多址方式 7
2.3 TD-SCDMA系统结构 8
2.3.1TD-SCDMA网络结构 8
2.3.2 UTRAN通用协议模型 9
3 无线资源管理及DCA技术研究 10
3.1无线资源管理的基本概念 10
3.1.1无线资源管理的模块组成及功能 10
3.1.2 TD-SCDMA无线资源管理特点 12
3.2动态信道分配 13
3.3动态信道分配算法研究 14
3.3.1中心控制式DCA 14
3.3.2基于单业务的DCA 14
3.3.3基于交叉时隙干扰的DCA 15
3.4 TD-SCDMA数据通道构造 15
3.5TD-SCDMA传输模块性能分析 17
4 结论 19
参考文献 20 |
