由于车联网(vehicle Ad hoc networks,VANETs)采用IEEE 802.11p协议,传输距离短,常引用多跳路由。为此,提出基于HELLO包的链路质量感知的多跳路由(HELLO packet-link quality aware based multi-hop routing,HPLQAMH)协议。引用HELLO包...由于车联网(vehicle Ad hoc networks,VANETs)采用IEEE 802.11p协议,传输距离短,常引用多跳路由。为此,提出基于HELLO包的链路质量感知的多跳路由(HELLO packet-link quality aware based multi-hop routing,HPLQAMH)协议。引用HELLO包建立一跳邻居集,减少控制开销;用隐晦确认机制构建具有双向通道的节点集,估计链路质量;通过链路质量和距离因子估计节点转发权重,依据节点权重设置消息转发时延,降低数据传输时延。仿真结果表明,HP-LQAMH协议在消息丢失率、吞吐量性能方面优于同类协议。展开更多
Having been a laowai in Suzhou for 4 years in the past, I am familiar with the "Hello!" phenomenon as pointed out by Mr. Olivier Roos in China Today August 2002. This has, however, never caused me any irrita...Having been a laowai in Suzhou for 4 years in the past, I am familiar with the "Hello!" phenomenon as pointed out by Mr. Olivier Roos in China Today August 2002. This has, however, never caused me any irritation. By responding with "Hello" or "Nihao," I could start a conversation, mostly with young students, who wanted to practice English.展开更多
文摘由于车联网(vehicle Ad hoc networks,VANETs)采用IEEE 802.11p协议,传输距离短,常引用多跳路由。为此,提出基于HELLO包的链路质量感知的多跳路由(HELLO packet-link quality aware based multi-hop routing,HPLQAMH)协议。引用HELLO包建立一跳邻居集,减少控制开销;用隐晦确认机制构建具有双向通道的节点集,估计链路质量;通过链路质量和距离因子估计节点转发权重,依据节点权重设置消息转发时延,降低数据传输时延。仿真结果表明,HP-LQAMH协议在消息丢失率、吞吐量性能方面优于同类协议。
文摘Having been a laowai in Suzhou for 4 years in the past, I am familiar with the "Hello!" phenomenon as pointed out by Mr. Olivier Roos in China Today August 2002. This has, however, never caused me any irritation. By responding with "Hello" or "Nihao," I could start a conversation, mostly with young students, who wanted to practice English.