摘要
通过扩展IEEE 802.11的数据帧,结合数据和能量优先等级对S-MAC协议进行改进,解决数据优先等级的携带问题.发送数据时,根据发送数据和能量的优先等级及网络负载情况,节点调整竞争窗口,使网络高优先等级数据优先发送,低优先级的数据延迟发送,减少碰撞.采用NS2仿真实验平台,对改进协议仿真测试.结果表明,改进后的S-MAC协议对高优先等级数据传输时延明显降低,均衡了网络负载,延长了网络生存时间.
In this thesis,portability problem of the priority data is solved by extending the data frames of IEEE802.11 and combining data and energy priority for S-MAC protocol enhancement. When transmitting data,the nodeadjusts the contention windows based on the priority levels of transmitting data and energy,and the network load inorder to help network send high-priority data and delay in sending low-priority data and reduce collisions.Improved protocol simulation tests could be done by using NS2 simulation platform. The results show that theimproved S-MAC protocol reduces the delay of data transmission for high-priority information significantly,achieving a balanced network load and prolonging the survival time of the network.
出处
《河南科学》
2015年第4期569-573,共5页
Henan Science
基金
国家自然科学基金项目(61103143)
河南省科技厅基础与前沿技术研究计划项目(122300410395)
