一种改进的位置信息服务方法

在许多情况下,移动主机需要获得网络中其他移动主机精确或概略的位置信息,即需要一种位置服务。在对目前现有的 5种位置服务即位置信息洪泛、DREAM位置服务、简单位置服务、反应式位置服务和GLS位置服务进行简单描述和性能比较的基础上,提出了一种新的位置服务,简单新位置更新服务(SNLUS)。它通过在位置信息表中增加“信息更新标识”对目前较好的简单位置服务协议(SLS)进行了改进。仿真结果说明,该算法可以用较少的开销获得较好的位置信息服务。

Improved method of location information service

In many cases, mobile host needs to obtain accurate or approximate location information in the network, i.e. needs a location service. Five existing location services known as Location Information Flooding(LIF), DREAM Location Service(DLS), Simple Location Service(SLS), Reactive Location Service(RLS), and GLS Location Service were briefly discussed and their performances were compared. Based on these protocols, a new location service named Simple New Location Update Service (SNLUS) was put forward. It improved the Simple Location Service (SLS) by adding "sign of information update" in location information table. Simulation results show that it provides an effective location information service with less overhead.