摘要
认知无线Mesh网络是下一代无线宽带通信系统的主要形式之一,它能通过使用授权网络未使用的频谱资源来提高网络带宽.组播是一种应用非常广泛的无线业务需求.本文主要研究CR-Mesh路由器和CR-Mesh终端之间的组播调度问题.由于CR-Mesh路由器和CR-Mesh终端具有可用信道异构的特征,这将导致无线业务组播的时间变长.本文的目标是最小化无线业务组播的时间,提出一种基于节点协助的分布式组播调度算法DAMSA,通过同组成员或者其他组成员的协助达到降低组播时间的目的.通过大量的仿真发现,我们提出的DAMSA算法不仅降低了无线业务需求的组播时间,而且提高了系统的吞吐量.
Cognitive wireless mesh network is one of the primary networks in the next generation broadband wireless communication system, which makes use of the unused spectrum resource which belongs to the primary users in order to increase the broadband. Multicast is one of the very popular wireless service. We are aim to solve the problem of multicast scheduling between the CR-Mesh route and CR-Mesh client. The multicast time of wireless service is becoming longer on account of the heterogeneous of channel for CR-Mesh route and CR-Mesh client. The goal of this paper is to minimize the multicast time of wireless service. A distributed assis- tance multicast scheduling algorithm （ DAMSA ） in cognitive wireless mesh networks is proposed in this paper. The multicast time of wireless service reduces through the assistance of nodes which belong to or not belong to the same multicast group. Simulation results show that the proposed algorithm not only can achieve low multicast time, but also can increase the throughout of system.
出处
《小型微型计算机系统》
CSCD
北大核心
2013年第2期264-268,共5页
Journal of Chinese Computer Systems
基金
国家自然科学基金面上项目(61073186
61073104
60903058)资助
湖南省科技计划重点项目(2010NK2003)资助
长沙市科技计划项目(K1005180-61)资助
湖南省公安厅科学研究项目(湘公装[2008]14号)资助
关键词
认知无线Mesh网络
组播
节点协助
cognitive wireless mesh network
multicast
node assistance
