基于命名数据网络的车载自组织网络数据分发机制

车载自组织网络（VANET）是一个高度动态的通信网络，设计稳定的数据分发机制是一个很大的挑战。将关注数据内容的命名数据网络（NDN）应用于车载自组织网络中，能有效缓解网络拓扑频繁变化所带来的问题。首先，优化命名数据网络的消息类型和数据结构；然后，结合车载自组织网络的特性，提出根据路段建立路由的方式，减少数据分发的开销。仿真实验结果表明，所提出的基于命名数据网络的车载自组织网络数据分发机制与应用于车载自组织网络数据分发的传统命名数据网络算法对比，数据转发平均命中率（AHR）提高大约53个百分点，平均转发次数减少大约0.4。因此提出的基于命名数据网络的车联网数据分发机制，采用新的路由方式，能够提高数据分发效率。

Named data networking based data dissemination mechanism for vehicular Ad Hoc network

Vehicular Ad Hoc Network (VANET) is a highly dynamic communication network, which means it's a great challenge to design a stable data dissemination mechanism. Applying Named Data Networking (NDN), which focused on the content of the data, to VANET could effectively relive the problems brought by the frequent change of network topology. Firstly, the message types and data structure of NDN were improved. Secondly, the way of establishing routes according to section was put forward with the combination of characteristics of VANET so as to reduce the cost of data dissemination. The simulation results show that compared to the traditional NDN algorithm which is applied to VANET data dissemination, Average Hit Rate (AHR) and Average Forward Times (AFT) can be significantly improved by VANET data dissemination mechanism based on NDN. Therein, the average increase of AHR is about 53 percent points, while the average reduction of AFT is about 0.4 times. Therefore, the improved VANET data dissemination mechanism can improve the efficiency of data dissemination by using the new routing method.