Web Services在基于WAP技术的LBS系统中的应用

介绍了WAP与Web Services的概念,给出了一种基于Web Services和WAP技术的LBS系统应用框架,重点叙述了该应用框架的组成和工作原理,并详细地介绍了该应用的设计和实现。

基于WebServices的LBS系统设计与实现

文章在对位置服务进行介绍的基础上 ,提出了一种基于WebServices架构的位置服务解决方案 ,并对其中的关键技术进行了探讨 ;采用J2ME和J2EE技术进行了详细的系统结构设计 ,并实现了一个原型的LBS系统。

基于LBS的旅游路线推荐系统设计

为满足日益增长的高品质、多样化、个性化旅游需求,采用基于位置的服务(Location Based Services,LBS),结合用户行为分析和智能算法处理,设计旅游路线推荐系统。该系统由个性化路线推荐模块、消息推送模块、用户管理模块、人工智能模块等构成。系统性能测试结果表明,该推荐系统能显著提高旅游规划效率和用户满意度,可为旅游行业智慧化服务模式发展提供技术支持。

User location privacy protection mechanism for location-based services

With the rapid development of the Internet of Things(IoT),Location-Based Services(LBS)are becoming more and more popular.However,for the users being served,how to protect their location privacy has become a growing concern.This has led to great difficulty in establishing trust between the users and the service providers,hindering the development of LBS for more comprehensive functions.In this paper,we first establish a strong identity verification mechanism to ensure the authentication security of the system and then design a new location privacy protection mechanism based on the privacy proximity test problem.This mechanism not only guarantees the confidentiality of the user s information during the subsequent information interaction and dynamic data transmission,but also meets the service provider's requirements for related data.

Location Privacy in Device-Dependent Location-Based Services:Challenges and Solution

With the evolution of location-based services(LBS),a new type of LBS has already gain a lot of attention and implementation,we name this kind of LBS as the Device-Dependent LBS(DLBS).In DLBS,the service provider(SP)will not only send the information according to the user’s location,more significant,he also provides a service device which will be carried by the user.DLBS has been successfully practised in some of the large cities around the world,for example,the shared bicycle in Beijing and London.In this paper,we,for the first time,blow the whistle of the new location privacy challenges caused by DLBS,since the service device is enabled to perform the localization without the permission of the user.To conquer these threats,we design a service architecture along with a credit system between DLBS provider and the user.The credit system tie together the DLBS device usability with the curious behaviour upon user’s location privacy,DLBS provider has to sacrifice their revenue in order to gain extra location information of their device.We make the simulation of our proposed scheme and the result convince its effectiveness.

Location Based Services Acceptance and Adoption Evaluation: An Investigation on Mobile Phone Users’ Response to Awareness and Utilization of LBS Technology in Nairobi Kenya

Location Based Navigation System (LBNS) is a specific Location Based Service (LBS) purely for navigational purpose. These systems resolve position of a user by using GNSS/GPS positioning technologies, to which supplementary information on goods and services are tagged. The navigation services have become popular and can be installed on mobile phones to provide route information, location of points of interest and user’s current location. LBS has continued to face challenges which include “communication” process towards user reference. Location Based Service System conveys suitable information through a mobile device for effective decision making and reaction within a given time span. This research was geared at understanding the state of LBS technology acceptance and adoption by users in Nairobi Kenya. To do this a quantitative study was carried out through a questionnaire, to investigate mobile phone users’ response on awareness and use of LBS technology. Testing the growth of this technology in this region compared to predictions in previous studies using Technology Acceptance Model (TAM), it is evident that many users may be aware of GPS functionality in mobile phones but are certainly yet to fully embrace the technology as they rarely use it. This points to some underlying challenges towards this technology within this part of the World, thereby recommending for deliberate monitoring and evaluation of LBS technology for sustenance growth based on user satisfaction and acceptance for improved usability.

Design and implementation of user information sharing system using location-based services for social network services

Internet takes a role as a place for communication between people beyond a space simply for the acquisition of information.Recently,social network service(SNS)reflecting human’s basic desire for talking and communicating with others is focused on around the world.And location-based service(LBS)is a service that provides various life conveniences like improving productivity through location information,such as GPS and WiFi.This paper suggests an application combining LBS and SNS based on Android OS.By using smart phone which is personal mobile information equipment,it combines location information with user information and SNS so that the service can be developed.It also maximizes sharing and use of information via twit based on locations of friends.This proposed system is aims for users to show online identity more actively and more conveniently.

Cloud-Based Spatial Information Service Architecture within LBS

Location Based Services (LBS) have become a popular technology to retrieve information about the surroundings of a mobile user which results in ubiquitous demand of spatial information service with diverse needs of different types of users. The aim of this paper is to reveal the potential of cloud-based spatial information service architecture that plays an integral role in LBS design and practice. This paper analyzes the characteristics of the spatial information of cloud services, such as data access transparency, spatial analysis parallelization, service capabilities flexible, information services standardization, service aggregation visualization, re-development flexible. This paper provides a possible solution to overcome the LBS service issues. In this paper, the short review of LBS and Cloud computing are given first and then the possibility of LBS design with cloud computing are analyzed. At last, cloud-based spatial information service architecture is proposed.

The NCC: An Improved Anonymous Method for Location-Based Services Based on Casper

Casper Cloak is a privacy protection method based on K-anonymity algorithm. To be anonymous, Casper Cloak needs to search regional sibling and parent node, which requires a complex process and huge expenditure. In addition,the anonymous area has space redundancy and it is not accurate enough to achieve high Location-Based Services (LBS) quality. To address these problems,this paper proposes an improved privacy protection method-NCC, based on the Casper Cloak. To reduce the unnecessary search, NCC introduced the concept of the first sibling node. NCC also improves the LBS quality by considering the characteristics of user mobility. Moreover, the improved method,NCC, which is incorporated with a redundancy optimization processing strategy,realizing more precise in the anonymous area and accurately guaranteeing the related degree of privacy. Adopting NCC verification experiments reflects varied advantages as bellow: (1) By reducing 80% searching time, NCC highly improved searching process. (2) The anonymous area produced in NCC not only meet users' anonymous demands, but the direction of the mobility which improves 4 times accuracy of services in comparison with Casper mode.(3) According to optimization strategy, NCC can reach minimum anonymous area index, increasing the rates of anonymous optimization in original algorithm.

基于微信与LBS云的应急避难场所信息服务系统研究及实现

为解决一直以来应急避难场所信息服务形式单一化、用户体验不佳、软件不易推广的现状,陕西省地震局结合微信这一在移动通讯领域得到广泛应用的即时通信平台和百度地图高性能集群式LBS云技术,设计并实现了一套应急避难场所信息服务系统。本文详细阐述了系统架构以及用户信息管理和位置上报、应急避难场所云数据存储和检索、避难路线规划导航等关键技术实现思路和方法。该系统具有使用便捷、易于推广、云计算性能高、人性化设计等优势,目前,已成为陕西省地震局最为重要的信息服务平台,为公众灾后紧急疏散提供了便利,提升了地震部门信息服务的有效性和针对性,为防震减灾信息化服务提供了新的思路和方法。

Visualization Techniques viaMLBS for Personnel Management in Major Events

Mobile location-based services(MLBS)refer to services around geographic location data.Mobile terminals use wireless communication networks(or satellite positioning systems)to obtain users’geographic location coordinate information based on spatial databases and integrate with other information to provide users with required location-related services.The development of systems based on MLBS has significance and practical value.In this paper a visualization management information system for personnel in major events based on microservices,namely MEPMIS,is designed and implemented by using MLBS.The system consists of a server and a client app,and it has some functions including map search and query,personnel positioning and scheduling,location management,messaging,and location service.Managers of the events can quickly search and locate the staff on the specific area of the map in real-time,and make broadcasting messages to the staff,and manage the staff.The client app is developed on the Android system,by which staff users can send the positions information to the server timely.The client users can search fuzzily near their peers and list their locations,and also call near peers through sending messages or query the history record of staff locations.In the design of the system,several new proposed techniques,including visual annotation method for overlapping locations,correcting trajectory drift algorithm,microservices-based overall system architecture methodology and other new techniques,which are applied to the implementation of the system.Also,HTML5,JQuery,MLBS APIs(Application Program Interfaces)related programming techniques have been used and combined with loading Ajax asynchronously and Json data encapsulation,map marker optimization techniques,that can improve the positioning accuracy and the performance of the system.The developed system with practical functions can enhance the efficiencies of the organization and management of major events.

LBS中连续查询攻击算法及匿名性度量

k-匿名机制是LBS(location based service)中保证查询隐私性的重要手段.已有文献指出,现有的k-匿名机制不能有效保护连续性查询的隐私性.提出一种连续查询发送模型,该模型融合了查询发送时间的间隔模型和连续性模型,针对此模型下的两种k-匿名算法Clique Cloaking和Non-clique Cloaking,分别提出了一种连续查询攻击算法.在此攻击算法下,匿名集的势不再适合作为查询匿名性的度量,因此提出一种基于熵理论的度量方式AD(anonymityd egree).实验结果表明,对连续性很强的查询,攻击算法重识别用户身份的成功率极高;AD比匿名集的势更能反映查询的匿名性.

基于SOA的面向服务LBS

LBS是GIS最有前景的应用方向之一,而以GIS和现代移动通信技术为基础的LBS存在用户访问方式多样、异构兼容性不足和开发维护不易等问题。提出了将SOA架构运用于LBS,结合中间件技术,运用开放的Web服务技术能较好地解决上述问题,并提出了面向服务的LBS定位服务平台架构和实施方案。

面向车辆监控的LBS地图可视化技术研究

为解决LBS技术中组件式地理信息服务在车辆监控应用中研发成本和应用门槛较高的问题,基于第三方地图服务,研究分别从数据层、中间处理层与用户交互层出发,实现坐标系统转换、空间数据筛选与图形叠加等监控数据地图可视化关键技术,将数据层中不同源空间数据筛选转换成用户层中图形可视化交互信息。研究实现实时位置追踪与车辆行驶轨迹等基础功能,验证了监控数据地图可视化技术的可行性;并测试空间数据筛选技术的有效性,数据筛选率最高为30%。

基于J2EE架构的LBS平台的设计与实现

鉴于现有LBS系统开发中的不足,提出了一种基于J2EE多层体系结构的通用的易于拓展的LBS平台系统设计方案,并通过利用J2EE技术中多种分布式组件的特性,实现了LBS平台中所有模块的功能。该系统不仅能满足当前LBS服务的用户需求,而且还能保证系统具有良好的开放性和可扩展性。

基于室内外定位的校园LBS研究

提出基于室内外定位的校园LBS平台总体框架,设计中心平台、移动终端和信息亭结构。给出室内定位系统,研究基于ZigBee的室内无线定位网络的部署原则和方法,建立基于室内外定位的校园LBS平台原型演示验证系统,该系统实现了终端定位、地图查询、三维浏览、导航与导游、跟踪监控、短信通知等功能。

基于SVG的开放式LBS系统设计与实现

基于SVG适合互联网传输的矢量数据格式 ,讨论了在基于位置的服务 (LBS)系统和移动终端上应用SVG作为GIS数据传输的可行性 ,结合J2ME和J2EE的技术特点 ,设计了一个开放的、可支持多种终端的LBS系统 ,并以掌上电脑作为移动终端 ,实现了该LBS系统。

基于LBS的分布式车辆监控信息服务平台

结合GPS、GPRS和Webservices构建应用于车辆监控信息服务的LBS平台,分析了以GPRS构建监控系统存在的问题及其解决方案。同时对信息的发布作了详细讨论,提出基于Webservices的分布式信息发布框架。设计采用B/S和C/S混合3层模式,实现了车辆监控信息服务平台,克服了信息广域共享问题,提高了管理性能,实验取得了较好的效果。

路网环境下保护LBS位置隐私的连续KNN查询方法

位置隐私保护与基于位置的服务(location based service,LBS)的查询服务质量是一对矛盾,在连续查询(continuous query)和实际路网环境下,位置隐私保护问题需考虑更多限制因素.如何在路网连续查询过程中有效保护用户位置隐私的同时获取精确的兴趣点(place of interest,POI)查询结果是目前的研究热点.利用假位置的思想,提出了路网环境下以交叉路口作为锚点的连续查询算法,在保护位置隐私的同时获取精确的K邻近查询(K nearest neighbor,KNN)结果;基于注入假查询和构造查询匿名组的方法,提出了抗查询内容关联攻击和抗运动模式推断攻击的轨迹隐私保护方法,并在分析中给出了位置隐私保护和查询服务质量平衡方法的讨论.性能分析及实验表明,该方法能够在连续查询中提供较强的位置隐私保护,并具有良好的实效性和均衡的数据通信量.

多种定位技术融合构建LBS体系

重点讨论LBS中的核心问题:定位技术和系统结构。介绍LBS(Location-BasedServices)的基本概念。