一种ANDSF获取接入网动态信息的方法

下一代异构无线网络环境是宽带移动无线接入和异构分布的网络,如何减少切换时延实现无缝切换是当前需要解决的问题。文章针对在切换之前如何获取有效的接入网信息提出了一种新的方法,即一种ANDSF(接入网发现和选择功能)获取接入网动态信息的方法,该方法可以保证ANDSF中接入网信息及时准确。然后介绍ANDSF功能实体,分析其工作原理,指出其不足,并提出改进方法。

A Method of Acquiring Access Network Dynamic Information for ANDSF

The next generation network is characterized of heterogeneity and broadband wireless access, how to minimize the handoff delay to achieve seamless handover is the current problem to be solved. In this paper, firstly, a kind of method to achieve effective information in the access network before handover is introduced. Specially, it is a method for ANDSF （access network discovery and selection function） to obtain dynamic information in the access network which can guarantee the information in ANDSF to be in time and accurate. And then the function entities in ANDSF are introduced, its working principles are analyzed, the shortcomings are pointed out and proposals to make improvements are offered in the end.