车载自组网(vehicular ad?hoc networks,VANETs)已经成为智能交通(intelligent transportation system,ITS)的重要组成部分。在高速动态的城市环境下,为使道路车辆尽快选择到传输信息的最佳路线,提出一种基于Nakagami?m信道模型的V2X通...车载自组网(vehicular ad?hoc networks,VANETs)已经成为智能交通(intelligent transportation system,ITS)的重要组成部分。在高速动态的城市环境下,为使道路车辆尽快选择到传输信息的最佳路线,提出一种基于Nakagami?m信道模型的V2X通信协议(V2X communication protocol based on Nakagami?m channel model,VCNCM),来提高数据传输率(packet delivery ratio,PDR)和降低平均端到端延迟(average?end?to?end?delay,AE2ED)。本协议采用路边基础单元(road side units,RSUs)辅助通信系统来寻找最佳的通信路径。同时,本协议还使用考虑车辆速度和密度的动态广播机制来提高路由决策的准确性。仿真实验采用SUMO处理哈尔滨的市区地图,其中NS3的仿真结果表明VCNCM在PDR和AE2ED方面具有较大的优势。展开更多
IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. ...IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. It is a two-way wireless communication technology with short distance, low complexity, low power consumption and low data transmission rate and low cost. The paper analyzes the features, framework, performance indicators and overall hardware platform structure of JN5121 chip which is used in JENNIC Corporation. And the paper researches the characteristics of actual oroducts for project development.展开更多
文摘车载自组网(vehicular ad?hoc networks,VANETs)已经成为智能交通(intelligent transportation system,ITS)的重要组成部分。在高速动态的城市环境下,为使道路车辆尽快选择到传输信息的最佳路线,提出一种基于Nakagami?m信道模型的V2X通信协议(V2X communication protocol based on Nakagami?m channel model,VCNCM),来提高数据传输率(packet delivery ratio,PDR)和降低平均端到端延迟(average?end?to?end?delay,AE2ED)。本协议采用路边基础单元(road side units,RSUs)辅助通信系统来寻找最佳的通信路径。同时,本协议还使用考虑车辆速度和密度的动态广播机制来提高路由决策的准确性。仿真实验采用SUMO处理哈尔滨的市区地图,其中NS3的仿真结果表明VCNCM在PDR和AE2ED方面具有较大的优势。
文摘IEEE802.15.4 is the communication protocol meeting the requirements of short distance and low transmission rate, and achieving the objective of low power. The technique is an emerging wireless communication standard. It is a two-way wireless communication technology with short distance, low complexity, low power consumption and low data transmission rate and low cost. The paper analyzes the features, framework, performance indicators and overall hardware platform structure of JN5121 chip which is used in JENNIC Corporation. And the paper researches the characteristics of actual oroducts for project development.
