无人机辅助车联网环境下干扰感知的节点接入机制

doi:10.11959/j.issn.1000-436x.2019081

Abstract

Abstract:

In vehicular Ad Hoc network (VANET),frequent link handovers and channel interference can lead to increased transmission delay and decreased network throughput.To address the issues,unmanned aerial vehicle (UAV) were introduced to cooperate with vehicles and construct UAV-assisted air-ground integrated VANET.An interference-aware node access scheme was proposed.The node access problem was formulated as a multi-objective optimization problem considering link transmission rate,link handovers and transmit power.Then the optimization problem was decomposed into two convex optimization sub-problems by dual decomposition method,the sub-problem jointly optimizes handovers and link transmission rate while the sub-problem optimizes the transmit power based on link reliability.Finally,simulation results show that the proposed mechanism can effectively improve data delivery ratio,average end-to-end delay and network throughput.

Key words: VANET, UAV, interference-aware, handovers

CLC Number:

TP393

FAN Xiying,HUANG Chuanhe,ZHU Junyu,WEN Shaojie. Interference-aware node access scheme in UAV-aided VANET[J]. Journal on Communications, 2019, 40(6): 90-101.

Figures/Tables 10

References 35

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参数	含义
R_V	车辆通信范围
R_U	无人机通信范围
r _ij	链路ij 的传输速率
P_i	节点i发射功率
n_i	切换次数
d _ij	节点i和j之间的距离
c _ij	链路ij 的最大容量
ε	更新操作步长
γ	更新操作步长
m	调整参数
CT_ij	节点i和j的连通时间
C _i) (P	节点处发射功率产生的成本函数
C _i) (n	切换产生的成本函数
β	信干噪比阈值
α	与切换成本相关的系数
θ	与功率产生成本相关的系数

仿真参数	数值
仿真区域大小	3 km×3 km
车辆移动速度/(m.s^-1)	0~13
无人机移动速度/(m.s^-1)	0~15
节点密度/(n.km^-1)	3~10
信干噪比/dB	2~12

Interference-aware node access scheme in UAV-aided VANET

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