警用微基站收发系统设计与实现

发布时间：2018-02-14 02:09

本文关键词： 微基站 OpenBTS 软件无线电　出处：《电子科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：虽然目前移动通信网络已经日渐成熟,但是传统的宏基站技术仍不能满足所有用户的需求,例如它们在某些人口稀少、利用率低的地区建设显得成本过高,且缺乏针对性。在本课题的警用项目中,警方需要一个能够对指定用户群进行统一化管理,且能支持车载、甚至随身携带的“移动基站”,此时显然一般基站不能满足此需求。针对这种情况,本文主要设计并实现了一种基于OpenBTS软件协议栈架构+USRP软件无线电硬件平台的警用微基站收发系统。首先,本文给出了警用微基站收发系统的项目需求,据此主要提出了两种思路不同的系统架构,经比较后以OpenBTS软件协议栈架构为核心的微基站设计方案作为系统方案,并对该方案的具体软、硬件平台该进行了分析与选型,总的来说,该方案有着开发成本低、开发周期较短、二次开发性强等优点。其次,本文完成了系统平台的搭建,并对其基本功能进行了实测。测试结果表明,该系统能够很好地完成包括语音通话、短信收发、流量管理在内的所有功能。接下来本文分析了该系统在不同场景下的参数配置方法,对OpenBTS系统中的通话数据流程进行了研究,并着重分析了transceiver模块,该模块为OpenBTS与USRP的桥梁,在整个系统中起着至关重要的作用。接下来,本文在三种不同的环境下对该系统的覆盖范围进行了实测,并在对该系统的组网功能进行研究后,根据爱尔兰公式讨论了在不同需求下系统理论上需要的载频数和USRP数。最后,本文对OpenBTS系统进行了优化设计,这也是本文的特色所在,主要内容包括:1.对原有的逻辑信道分配策略进行了改进,使系统变得更加稳定,业务处理能力得到了加强。2.针对项目实际需求,增加了特定功能模块,包括短信群发模块、分组管理模块和定时管理模块。3.讨论了系统的安全性问题,分析了该系统可能出现的安全漏洞,设计并实现了一套用户安全性管理方案。总的来说,本文的研究工作已经取得了阶段性的成果,其功能基本能够满足项目需求,为团队接下来的研究打下了坚实的基础。
[Abstract]:Although mobile communication networks are becoming more and more mature, the traditional Acer station technology is still unable to meet the needs of all users. For example, they appear to be too expensive to build in some areas where the population is scarce and utilization is low. And lack of pertinence. In the police project of this subject, the police need a unified management to the designated user group, and can support the vehicle, Even the "mobile base station" that you carry with you, it is obvious that the general base station cannot meet this requirement at this point. This paper mainly designs and implements a police micro-base station transceiver system based on OpenBTS software stack architecture USRP software radio hardware platform. Firstly, this paper gives the project requirements of police micro-base station transceiver system. Based on this, two different system structures are put forward. After comparison, the design scheme of microbase station based on OpenBTS software stack architecture is taken as the system scheme, and the specific software and hardware platform of this scheme is analyzed and selected. In general, the scheme has the advantages of low development cost, short development period and strong secondary development. Secondly, the system platform is built and its basic functions are measured. The test results show that, The system can complete all functions including voice call, short message sending and receiving, traffic management and so on. Secondly, this paper analyzes the parameter configuration method of the system under different scenarios, and studies the call data flow in OpenBTS system. The transceiver module, which is a bridge between OpenBTS and USRP, plays an important role in the whole system. Then, the coverage of the system is measured in three different environments. After studying the networking function of the system, according to the Irish formula, the paper discusses the carrier frequency and USRP number needed by the system in theory under different requirements. Finally, this paper optimizes the design of the OpenBTS system, which is also the characteristic of this paper. The main contents include: 1.improve the original logical channel allocation strategy, make the system more stable, and enhance the business processing ability. 2. According to the actual requirements of the project, added specific function modules, including short message group module, Packet management module and timing management module .3.This paper discusses the security problems of the system, analyzes the security vulnerabilities that may appear in the system, and designs and implements a set of user security management schemes. The research work of this paper has already obtained the stage achievement, its function basically can satisfy the project demand, has laid the solid foundation for the team next research.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

【相似文献】