VoWLAN快速切换方法研究  

Study on the method of the fast handoff for VoIP over WLAN

作　　者：李闯[1] 褚丽莉[1] 曹灵莉[1] 王玉辰[1] 

机构地区：[1]辽宁工业大学,辽宁锦州121001

出　　处：《信息通信》2016年第1期199-201,共3页Information & Communications

摘　　要：无线局域网承载下的Vo IP切换延迟是由探测扫描、认证和重联接引起的,其中探测扫描阶段占总切换延迟的90%以上,因此解决探测阶段的延迟至关重要。文章对无线局域网(WLAN)探测阶段的主要切换方法和策略,并给出了相应的解决方案。利用邻居图的算法,找出当前AP相邻的APs,综合了信号强度、信道利用率,接入用户数以及APs剩余带宽和移动终端所需要的带宽之间关系,进行切换权值计算,选择候选APs进行认证重关联。vowlan switch delay is caused by the probe scanning, authentication and reconnection. The probe scanning phase accounts for more than 90% of the total switching delay. So solving the probe scanning phase＇s delay is very important. The thesis gives the corresponding solutions on scanning phase of wireless local area network including the main switch methods and strategies. We find out the current APs which is adjacent to AP by the neighbor graph algorithm. To select a candidate APs re-associate certification, we have to calculate the switch weight combining the signal strength, the relationship between the channel utilization, the number of users and bandwidth APs surplus bandwidth and bandwidth mobile terminals need.

关 键 词：WLAN 切换延迟 权值计算 

分 类 号：TN915.65[电子电信—通信与信息系统]