城市空间信息系统面向移动用户服务实现中若干关键技术的研究
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摘要
随着无线数据通信技术的飞速发展，基于无线数据通信的空间信息服务成为可能，于是面向移动用户的城市空间信息服务平台出现了。但是由于移动环境自身的特点包括无线通信带宽窄、移动终端性能弱等，我们不能简单的将一般面向移动用户的城市空间信息平台等同与面向移动的平台。我们需要出于移动的角度，来研究和开发面向移动用户的城市空间信息平台以及其终端产品，尽可能减缓空间信息量大、无线带宽窄、移动终端存储容量少这三者之间的矛盾。
本论文根据国家863项目：《基于SIG框架的(上海)城市空间信息应用服务系统———面向移动平台信息采集与服务子系统》的要求，主要从面向移动终端的城市空间信息服务平台、移动终端以及两者之间的空间数据传输的关键技术三方面进行了研究与探讨。目的是实现移动终端与移动代理平台之间更有效的交互，使城市空间信息移动用户能够在移动的环境下高效的利用空间信息，如定位查询、地图下载导航等。针对无线带宽窄、通信速率慢、移动终端的存储量小等移动环境的特点，我提出了一些算法和方法，包括有：基于“点源理论”的信息场点源体和单位点源体的描述方法；城市空间信息在代理与终端的优化传输算法。重点分析了移动终端上的设计的关键技术，总结了相关经验与方法，并且仿真实现了面向城市空间信息的移动终端软件
With rapid development of wireless network, it is possible that users can access spatial information services in mobile environment. So the spatial information service platform for mobile users is forwarded. Since wireless network transmission speed is much slower than the wire network and the performance of mobile terminal such as storage and CPU is worse compared with PC, the platform for mobile users is not equivalent to the spatial information service platform for wire users. So we should think much of limitations of mobile factors including the network and terminals when we design the spatial information service platform for mobile users and mobile terminals.
In this article, my main work is to research key technology of three parts including the spatial information service platform, mobile terminals for spatial information service and the transmission between the platform and the terminals. My research aim is to find some methods that make the platform can more effectively provide service for mobile users and users can more efficiently access the service platform in such current wireless environment. In this article, I propose two descriptions of objects. In addition, according to different data formats (grid and vector), I forward two different transmission algorithms, in order to shorten the transmission bytes in wireless networks. Furthermore, I analyze key technologies of mobile terminals and provide methods for design of terminals.
本论文根据国家863项目：《基于SIG框架的(上海)城市空间信息应用服务系统———面向移动平台信息采集与服务子系统》的要求，主要从面向移动终端的城市空间信息服务平台、移动终端以及两者之间的空间数据传输的关键技术三方面进行了研究与探讨。目的是实现移动终端与移动代理平台之间更有效的交互，使城市空间信息移动用户能够在移动的环境下高效的利用空间信息，如定位查询、地图下载导航等。针对无线带宽窄、通信速率慢、移动终端的存储量小等移动环境的特点，我提出了一些算法和方法，包括有：基于“点源理论”的信息场点源体和单位点源体的描述方法；城市空间信息在代理与终端的优化传输算法。重点分析了移动终端上的设计的关键技术，总结了相关经验与方法，并且仿真实现了面向城市空间信息的移动终端软件
With rapid development of wireless network, it is possible that users can access spatial information services in mobile environment. So the spatial information service platform for mobile users is forwarded. Since wireless network transmission speed is much slower than the wire network and the performance of mobile terminal such as storage and CPU is worse compared with PC, the platform for mobile users is not equivalent to the spatial information service platform for wire users. So we should think much of limitations of mobile factors including the network and terminals when we design the spatial information service platform for mobile users and mobile terminals.
In this article, my main work is to research key technology of three parts including the spatial information service platform, mobile terminals for spatial information service and the transmission between the platform and the terminals. My research aim is to find some methods that make the platform can more effectively provide service for mobile users and users can more efficiently access the service platform in such current wireless environment. In this article, I propose two descriptions of objects. In addition, according to different data formats (grid and vector), I forward two different transmission algorithms, in order to shorten the transmission bytes in wireless networks. Furthermore, I analyze key technologies of mobile terminals and provide methods for design of terminals.
引文
[1] 863 《基于SIG框架的(上海)城市空间信息应用服务系统》项目专利
[2] 唐辉，《基于图像的三维建模方法》华东师范大学硕士论文
[3] 任福，《基于PDA的个人移动导航系统的设计与实现》
[4] 陈军，《数字中国地理空间基础框架》
[5] 王家耀，《城市空间信息系统原理》
[6] 徐志杨，《无线定位TDDA估计及应用研究》交通大学博士论文
[7] 李天文，《GPS原理与应用》
[8] 张博，《GPS在农业中的应用技术研究》
[9] 移动定位服务，http://lingtu.com
[10] 李建中，《移动计算中的数据管理》，计算机世界
[11] 蔡建平，《关于嵌入式应用开发技术》，单片机与嵌入式系统应用
[12] 李涛，《瘦客户／服务器系统及应用》
[13] 沈庆国，《移动计算机通信网络》
[14] 《嵌入式系统开发圣经(第二版)》
[15] Shapefile Paper
[16] Mif Paper
[17] DBF paper
[18] Daubechies, 'Ten Lectures on Wavelets'
[19] Mallat,'A Wavelet Tour of Signal Processing(Second Edition)'
[20] Mallat, 'Multifrequency channel decomposition of images and wavelet models. IEEE Transact, Speech, Signal Processing'
[21] CompactGPS User Manual
[22] http://www.opengis.org, The OpenGIS Consortium Technical Committee, The OpenGIS Guide—Introduction to Interoperable Geoprocessing and the OpenGIS Specification, third Edition, 1998。
[23] http://www.opengis.org, The OpenGIS Consortium Technical
Committee, The OpenGIS Abstract Specification Model, Topic 0—Topic 14, Version 3, 1998。
[24] http://www.gridcomputing.com
[25] www.gridforum.org/
[26] Lattice Mobile Computing White Paper, http://www.lattice.com
[27] RFC1661 "The Point to Point (PPP)"
[28] Mobile Computing and Supporting Network Infrastructure, A report for CS367M Data Communication Class
[2] 唐辉，《基于图像的三维建模方法》华东师范大学硕士论文
[3] 任福，《基于PDA的个人移动导航系统的设计与实现》
[4] 陈军，《数字中国地理空间基础框架》
[5] 王家耀，《城市空间信息系统原理》
[6] 徐志杨，《无线定位TDDA估计及应用研究》交通大学博士论文
[7] 李天文，《GPS原理与应用》
[8] 张博，《GPS在农业中的应用技术研究》
[9] 移动定位服务，http://lingtu.com
[10] 李建中，《移动计算中的数据管理》，计算机世界
[11] 蔡建平，《关于嵌入式应用开发技术》，单片机与嵌入式系统应用
[12] 李涛，《瘦客户／服务器系统及应用》
[13] 沈庆国，《移动计算机通信网络》
[14] 《嵌入式系统开发圣经(第二版)》
[15] Shapefile Paper
[16] Mif Paper
[17] DBF paper
[18] Daubechies, 'Ten Lectures on Wavelets'
[19] Mallat,'A Wavelet Tour of Signal Processing(Second Edition)'
[20] Mallat, 'Multifrequency channel decomposition of images and wavelet models. IEEE Transact, Speech, Signal Processing'
[21] CompactGPS User Manual
[22] http://www.opengis.org, The OpenGIS Consortium Technical Committee, The OpenGIS Guide—Introduction to Interoperable Geoprocessing and the OpenGIS Specification, third Edition, 1998。
[23] http://www.opengis.org, The OpenGIS Consortium Technical
Committee, The OpenGIS Abstract Specification Model, Topic 0—Topic 14, Version 3, 1998。
[24] http://www.gridcomputing.com
[25] www.gridforum.org/
[26] Lattice Mobile Computing White Paper, http://www.lattice.com
[27] RFC1661 "The Point to Point (PPP)"
[28] Mobile Computing and Supporting Network Infrastructure, A report for CS367M Data Communication Class