A Controller-Assisted Distributed (CAD) Load Balancing Scheme for ZigBee Networks

Kuei-Li Huang, C. Tseng, Jui-Tang Wang, Tsung-Hsi Yang
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引用次数: 3

Abstract

In this paper, we propose a controller-assisted distributed (CAD) load-balancing mechanism for the ZigBee network containing multiple personal area networks (PANs). Shifting the enforcement part from the central controller to PANs, each PAN in CAD maintains its load status whereas the central controller simply maintains node numbers of PANs and a list of switch pairs which each is formed from two nodes nearby in different PANs, denoting a possible load switch between the two PANs. Upon perceiving a network unbalanced, the controller just provides a heavy-loaded PAN a switch pair and an offload threshold so that the PAN enforces the offload of a sub tree onto a neighbor PAN. The number of nodes in sub tree may be exactly smaller than the threshold due to maintenance situation in PAN. Simulation results show that CAD achieves a same load balancing result as a centralized method which outperforms other methods, yet costing fewer control messages.
ZigBee网络的控制器辅助分布式(CAD)负载均衡方案
在本文中,我们提出了一种控制器辅助分布式(CAD)负载平衡机制,用于包含多个个人区域网络(pan)的ZigBee网络。将执行部分从中央控制器转移到PAN, CAD中的每个PAN维护其负载状态,而中央控制器仅维护PAN的节点数和由不同PAN中相邻的两个节点组成的开关对列表,表示两个PAN之间可能的负载切换。当感知到网络不平衡时,控制器只提供一个重载PAN、一个交换对和一个卸载阈值,以便PAN将子树的负载强制卸载到邻居PAN上。由于PAN中的维护情况,子树的节点数可能恰好小于阈值。仿真结果表明,采用集中式控制方法可以达到与集中式控制方法相同的负载均衡效果,且所消耗的控制消息更少。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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