面向道路实况的车联网共享消息可信评估模型  

A Truth-Oriented Trust Evaluation Model of Shared Messages about Road Events in Internet of

作　　者：张佳敏 帅莉莎 董高雅 阳小龙[1] ZHANG Jiamin;SHUAI Lisha;DONG Gaoya;YANG Xiaolong(School of Computer and Communication Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学计算机与通信工程学院,北京100083

出　　处：《北京邮电大学学报》2023年第4期40-45,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61971033);工信部2020年工业互联网创新发展工程项目(TC200H01V)。

摘　　要：车联网环境下车辆间共享路况消息的可信性是事关交通出行效率和司乘人员安全的关键决策依据。为此,本着“察其言,观其行,重事实”的理念,提出一个面向道路实况的共享消息多维协同信任评估模型。在实体维度,依据车辆作为发送者和评估者的信任值计算实体信任值,解决因忽略实体的评估者角色而造成其信任值不准确的局限。在行为维度,为了对消息记录条数和真实提供频次不同的车辆实现公平评估,根据车辆对事件的共享率和诚实转发率计算车辆的行为信任值。在事实维度,定义以事实为中心的信任纠偏,以修正对诚实车辆的非主观恶意行为的误判。仿真结果表明,所提模型可以准确、公平地评估消息的可信性,有助于抑制虚假消息的散播。In the Internet of vehicles,the reliability of road condition message shared between vehicles is the key decision-making basis for the efficiency of transportation and the safety of drivers and passengers.To this end,a multi-dimensional collaborative trust evaluation model for shared message based on road facts is proposed,which is based on the concept of"understanding what they say,observing what they do,and emphasizing facts".In the entity dimension,the entity trust value is calculated according to the trust value of the vehicles acted as sender and evaluator,which overcomes the limitation of inaccurate trust value caused by ignoring the evaluator role of the entity.In the behavior dimension,to achieve a fair evaluation of vehicles with different message records and frequency of real provision,the behavior trust value of the vehicles is calculated according to the sharing rate and honest forwarding rate to the event.In the fact dimension,the fact-centered trust correction is defined to correct misjudgment of the non-subjective malicious behavior of honest vehicles.The simulation results show that the proposed model can accurately and fairly evaluate the credibility of messages,which contributes to suppress the spread of false messages.

关 键 词：车联网 消息可信性 信任评估模型 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]