移动位置信息服务平台的研究与实现

【作者】 刘江涛；

【导师】 夏清国；

【作者基本信息】 西北工业大学 ， 计算机科学与技术， 2007， 硕士

【摘要】 移动位置服务(Location Based Service，LBS)是通过移动网络获取移动终端的经纬度坐标，在地理信息系统的支持下为用户提供相应服务的一种移动增值业务。移动位置服务融合了移动通信、空间定位、地理信息系统、分布式计算等多项技术，反映了空间信息社会化的趋势，具有巨大的市场潜力。然而，移动位置服务的技术门槛较高，业务开展的难度较大。为了整合现有地理信息系统，方便服务运营商开发LBS业务，本文设计并实现了一个通用的移动位置信息服务平台，论文的主要工作包括： 1．介绍了基于基站网络、卫星定位和辅助GPS三种常见的定位技术。阐述了移动定位协议在定位数据传输中的作用，分析了各种定位请求的交换方式及Le接口协议的组成。 2．结合OpenLS框架，详细阐述了LBS平台的参考体系结构、核心服务和关键用例。讨论了地理信息处理引擎的技术需求以及GML语言在空间信息交互中的作用。介绍了短消息和WAP接入的业务流程，重点分析了CMPP协议、ISMG网关和WAP网关等访问接入技术。 3．设计了一个基于J2EE框架的移动位置服务平台，实现了平台的各个核心组件，包括适用于不同网关、不同协议的短消息接口组件；可以根据移动终端的种类动态生成结果的WAP接口组件；支持定位缓冲、异步多线程功能的定位接口组件；支持业务订购和用户自服务的MISC接口组件；基于GML消息交换的GIS引擎接口组件。分析了异步消息传递、地理信息查询、移动地图渲染等一系列实现问题。 4．讨论了服务门面和WebService两种服务提供方式的共性与差异，给出了LBS服务的集成方法，分析了LBS应用服务的访问控制及隐私保护策略。简单概述了用户自服务，计费对帐等平台子系统的功能。更多还原

【Abstract】 Location Based Service is a new wireless value-added service, which can provide mobile users location-based information services through mobile network.LBS is a fusion of spatial information technology, mobile communication, GPS, GIS, which reflects a tendency of socialization of spatial information and has promising market revenue. However, it is very difficult for service providers to enter the industry. To integrate existing geographic information system, to facilitate the development of LBS for services operators, this paper describes the design and implementation of a universal platform for location-based service. The research work of this thesis includes:1. Introduced three common positioning technology, include Cell-ID, satellite positioning and GPS assistant. Elaborated the functions of mobile location protocol in position data transmission. Analysed various methods of location requests and the composition of Le interface protocol.2. Elaborated LBS platform reference architecture and core services with key cases based on OpenLS framework. Discussed geographic information-processing engine technology and the characteristic of GML in the interactive space information. Analysed SMS and WAP technology, CMPP protocol, ISMG Gateway, WAP Gateway and other related technologies and business processes.3. Designed a location-based service platform based on J2EE framework. Implemented core components of the platform,include: Gateway applicable Short Message interface components, WAP interface component which can dynamic generate result pages according to the types of mobile terminal, positioning interface components supported location Buffer and asynchronous multithreading function, MISC interface components for User-order business and support services, GML-based information GIS interface engine components.Analysed a series of implementation problems such as asynchronous message interactive, geographic information inquiries and mobile map Rendering.4. Introduced Facade of service delivery and WebService delivery, and the similarities and differences between the two types of services. Given LBS integration services, analysis of LBS application service access control and privacy protection strategy. Simple overview of user self-help services and accounting reconciliations subsystems.更多还原