一种软件定义无线网络负载均衡架构及算法

软件定义网络（ SDN）为实现异构无线网络中的负载均衡提供了新的思路.设计了一种软件 定义的无线网络负载均衡架构,并提出对应算法.首先,根据接收信号强度构建候选网络列表;其 次,根据各候选网络的可用负载比率标准差进行负载差异分级;再次,将服务质量匹配度函数和负载 均衡指数线性组合成联合优化函数,并根据负载差异分级对联合优化的权重进行动态调整,合理设 置门限进行接纳控制.与传统算法相比,所提算法一方面可使各类业务阻塞率明显降低大约20% , 另一方面使不同网络的归一化负载更加接近.该算法在进行网络负载均衡的同时,能够有效降低业 务阻塞率,从而有效提升异构无线网络的整体性能....

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Bibliographic Details
Published in电讯技术 Vol. 57; no. 1; pp. 72 - 77
Main Author 郭娟 张森 姚远
Format Journal Article
LanguageChinese
Published 西安邮电大学通信与信息工程学院,西安,710121%西安邮电大学电子工程学院,西安,710121 2017
Subjects
异构无线网络
接纳控制
负载均衡
软件定义网络
load balancing
负载均衡
heterogeneous wireless network
软件定义网络
admission control
software defined network
异构无线网络
接纳控制
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ISSN1001-893X
DOI10.3969/j.issn.1001-893x.2017.01.012

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Summary:软件定义网络（ SDN）为实现异构无线网络中的负载均衡提供了新的思路.设计了一种软件 定义的无线网络负载均衡架构,并提出对应算法.首先,根据接收信号强度构建候选网络列表;其 次,根据各候选网络的可用负载比率标准差进行负载差异分级;再次,将服务质量匹配度函数和负载 均衡指数线性组合成联合优化函数,并根据负载差异分级对联合优化的权重进行动态调整,合理设 置门限进行接纳控制.与传统算法相比,所提算法一方面可使各类业务阻塞率明显降低大约20% , 另一方面使不同网络的归一化负载更加接近.该算法在进行网络负载均衡的同时,能够有效降低业 务阻塞率,从而有效提升异构无线网络的整体性能.
Bibliography:GUO Juana,ZHANG Sena,YAO Yuanb（a. School of Communication and Information Engineering; b. School of Electronic Engineering,Xi＇an University of Posts and Telecommunications, Xi＇an 710121, China）
software defined network;heterogeneous wireless network;load balancing;admission control
Software defined network（SDN） provides a new way to achieve load balancing in heterogeneous wireless networks. Aload balancing architecture and algorithm for software defined wireless network are proposed. First,the algorithm constructs a list of candidate networks based on the received signal strength （RSS）. Secondly,by calculating the standard deviation of available load ratio in each available candidate network,the load differences among the candidate networks are classified. Then,a jo in t optimization func-tion is proposed by linearly combing a quality of service（ QoS） matching function and a load balancing in-dex. In accordance with classification results,the weight of the joint optimization function is dynamically ad-justed an
ISSN:1001-893X
DOI:10.3969/j.issn.1001-893x.2017.01.012