In vehicular ad-hoc network, vehicles are move very speedy thus their topology is changing frequently and intermittent connectivity occur often. The intermittent connectivity network (delay and disruption-tolerant network) resulting is end to end path is absent. In this intermittent network connectivity areas, during emergency event occurs, emergency rescue message (Example: Fire, Accident, etc.,) are sent to a rescue team is most necessary. Due to these constraints, general ad hoc protocol approaches is not suitable and, as a result, alternative protocol must be deliberated. This leads to the make a specific protocol mechanisms able to deliver both fast and trustworthiness in-order delivery emergency message needed. Thus we introduce the DFEMDR protocol, it follow the vehicular delay tolerant network (VDTN) common technique store carry-forward method and message replicas. This paper describes an efficient Delay tolerant Fast Emergency Message Dissemination Routing Protocol, called DFEMD routing protocol. This protocol enables in VDTN, the source node broadcast an emergency message to all available node in its communication range. The source node allocates a message replicas and message time to live to the neighbour nodes (forwarded node) based on that node has credence value. Credence value is calculated to all nodes based on two values; the first value is visited level estimation, it is calculated based on the number of nodes previously visited by the node. The second value is Destination Reaches Level Estimation (DLE); it is calculated based on the number of times the node successfully delivered the message to the destination. Finally, each node credence value is calculated, from this visited level and destination reaches level estimation values. Finally, the trust authority received emergency messages and evaluate the trustworthiness of message based on message reputation value or message confidence value.

在车载自组织网络中，车辆移动速度非常快，因此它们的拓扑结构经常变化并且经常发生间歇性连接。导致端到端路径不存在的间歇性连接网络（延迟和中断容忍网络）。在这个网络连接断断续续的地区，在紧急事件发生时，将紧急救援信息（例如：火灾、事故等）发送给救援队是最必要的。由于这些限制，一般的 ad hoc 协议方法不合适，因此必须考虑替代协议。这导致使特定的协议机制能够交付所需的快速且可信赖的有序交付紧急消息。因此我们引入了 DFEMDR 协议，它遵循车辆延迟容忍网络（VDTN）通用技术存储结转方法和消息副本。本文介绍了一种高效的容错快速紧急消息传播路由协议，称为 DFEMD 路由协议。该协议使得在 VDTN 中，源节点向其通信范围内的所有可用节点广播紧急消息。源节点根据邻居节点（转发节点）的信任值分配消息副本和消息生存时间。基于两个值计算所有节点的信用值；第一个值是访问级别估计，它是根据节点先前访问过的节点数计算的。第二个值是目标到达级别估计 (DLE)；它是根据节点成功将消息传递到目的地的次数来计算的。最后，计算每个节点的信任值，从这个访问级别和目的地到达级别估计值。最后，信任机构接收紧急消息并根据消息信誉值或消息置信度值评估消息的可信度。