With the popularity of small cells in the campus network construction,the research about location service based on small cell is a kind of active exploration for the application of location service on the smart campus. The system contains four subsystems,including access,switching,data and service,which are implemented by Femtocells,soft-switching devices,small cells and campus geospatial data-bases,and location service. The location service represents signal covering area as open geospatial consortium specified buffer object based on the parameters of cells' air interface. It calculates the related spatial features from campus geospatial database with spatial reasoning technology,builds the relationships between small cells and mobile stations and computes the place and trajectory of users. The experi-mental results indicate that personnel distribution and individual behavior can be investigated at some accepted fine granular level,at the ground of rational siting of small cell stations and parameters setting within reasonable scopes,without the privacy violation at best effort.%随着小基站在校园无线网络构建中的普及,研究基于小基站的位置服务是对位置服务在智慧校园中应用的一种积极探索.该系统包含接入、交换、数据、服务四个子系统,分别由Femtocell基站、软交换设备、小基站数据库及校园地理数据库以及定位服务所构成.定位服务根据基站的空中接口参数将其信号覆盖区域表示成符合OGC规范的缓冲区对象,利用空间推理技术计算出校园地理数据库中与缓冲区对象关联的道路、建筑等空间要素,将接入特定基站的移动站与相应的空间要素关联,从而计算用户所在的场所及轨迹.实验结果表明,合理选择小基站的放置地点以及参数设置,将信号覆盖范围关联的空间要素数量控制在一个合理的范围内,该系统就能在尽量不侵犯个人隐私的前提下,较细粒度地为校园内人员分布和个人行为统计提供支持.
展开▼
