位置服务：接地气的云计算

摘要

With the rapid development of mobile internet ,human society has inevitably become a large-scale social network with massive data .With the support of cloud computing ,plenty of achievement has been made in all aspects .The most down-to-earth one among them is location-based service(LBS) .Combined with cloud computing ,traditional geographic information system now possess social ,location and mobile features ,making it a daily service .In this paper ,we describe key technique of location-based Service ,and then propose both inner and outer design criterion for cloud-based LBS data center .We expect these proposes will help LBS to be the most popular application for cloud computing .%随着移动互联网的迅猛发展，人类社会已不可避免的进入了大数据时代。云计算支撑大数据发现价值，在各个领域均已开花结果，其中最典型的案例，就是无人不用，无时不需，无所不在的位置服务。传统的地理信息系统（GIS）、导航定位系统（GNS）与云计算结合，给原本垂直的领域应用赋予了社交、位置和移动等特点。研究位置服务的关键技术，探讨云计算支撑下位置服务数据中心的特点，应具备的内在指标如时间连续，空间无缝、精度多样、结果可靠、在线服务，和外在指标如电力消耗随服务负载变化情况，带宽支持及其动态使用情况，位置服务覆盖的范围和粒度，服务注册的用户数量及在线微支付能力等等，能有效促进位置服务成为最接地气的云计算。