基于3G的VANETs数据传输的技术研究  

Research on data delivery in VANETs 3G-assisted

作　　者：赵凯[1] 李玮瑶[2] 

机构地区：[1]平顶山学院教务处,河南平顶山467000 [2]平顶山学院计算机科学与技术学院,河南平顶山467000

出　　处：《电子设计工程》2016年第5期130-133,共4页Electronic Design Engineering

摘　　要：在车载自组织VANETs中,为解决车辆间通信数据传输不流畅的问题。提出采用3G辅助VANETs的数据传输技术。在无法利用VANETs多跳通信传输数据时,启动3G传输,将此方案命名为3GDD,首先建立数据传输率和数据传输时延的效用函数,利用3G辅助VANETs数据传输实现最大化效用;其次,为了避开优化问题的复杂性,将原始的优化问题变换成整数线性规范问题ILP(integer linear programming problem);最后通过解决ILP,在不同时刻分配3G预算,并选择最不可能通过VANETs传输的数据用于3G传输。实验结果表明,提出的3GDD与同类的方案相比具有良好的性能。Data delivery is significant impact on application of a vehicular ad hoc network （VANET）. In this paper, we explore the problem of 3G-assisted data delivery in a VANET with a budget constraint of 3G traffic. A packet can either be delivered via multi-hop transmissions in the VANET or via 3G. We propose an approach called 3GDD for 3G-assisted data delivery in a VANET. Firstly, we construct a utility function to explore the tradeoff between delivery ratio and delivery delay, which provides a unified framework to reflect the two factors. We formulate the 3G-assisted data delivery as an optimization problem in which the objective is to maximize the overall utility under the 3G budget constraint. Secondly, to circumvent the high complexity of this optimization problem, we further transition the original optimization problem as an integer linear programming problem （ILP）. Finally, solving this ILP, we derive the 3G allocation over different time stages. Given the 3G budget at each time stage, those packets that are most unlikely delivered via the VANET are selected for 3G transmissions. Evaluation results show that our approach outperforms other schemes.

关 键 词：3G 效用函数 整数线性规划 数据传输率 VANETS 

分 类 号：TN915.11[电子电信—通信与信息系统]