关键词: 移动自组网, 位置服务, 移动主机

Abstract: 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.

Key words: MANET(Mobile Ad-hoc NETwork), location service, mobile host