摘要
在多数的公网集群通信系统中,对切换的时延要求很高,如何减小切换时延变得相当重要。在公网集群通信系统中引入TD-LTE技术,使切换时延得到一定的减小,但切换过程中,基站和e MME间的频繁通信仍然增大了延时。基于背景扫描的切换算法,其思想是让e MME将其控制的所有基站下的小区的信息缓存起来,在进行切换时,e MME只需要查询自己的信息列表,从中获取目标小区的切换门限值、载频、预留的信道资源等信息,无需与目标基站通信,这样就减少基站和e MME间的频繁通信,整个切换过程主要在源基站和e MME侧完成,从而获得更低的时延。
In most public cluster communication system,requirements are high for the low time delay of switching. How to reduce the switching time delay becomes quite important. Public cluster communication system based on TD-LTE has some improvement in switching delay,but frequent communication between station and e MME also leads to the time delay. In switching algorithm based on the background of scan,e MME caches the information of communities which are covered by stations which are controlled by e MME,in order to reduce the frequent communication between station and e MME,so as to obtain lower delay.
出处
《数字通信》
2014年第6期44-47,共4页
Digital Communications and Networks
