In this paper we provide an abstract view of the long-term evolution vehicular ad-hoc network (LTE-V) and propose analytical models to obtain its reliability and survivability metrics. Various stochastic modeling techniques (such as semi-Markov process, reliability block diagrams, and Markov chains) are used to develop these models. Reliability of the LTE-V network is obtained through reliability block diagrams. In addition to reliability, the availability of channels should also be taken into consideration for a better performance of the network. To serve this purpose, measures such as blocking and dropping probabilities of service requests in various states of the reliability model are also obtained. A two-level hierarchical model is developed to obtain these measures in which the upper level is a reliability model that behaves as a Markov reward model and the lower level is a performance model for the availability of channels. Apart from a reliable network, a fault tolerant network is also required to satisfy the high expectations of the users. Therefore, various survivability measures for the LTE-V network are also evaluated which depict the impact of hardware failure and unavailability of channels on the performance measures. Further, the average number of service requests lost due to hardware failures is also obtained as a performance measure. To demonstrate the viability of our approach, numerical illustrations of the proposed models are presented. The numerical results are also validated via simulation.

在本文中，我们提供了长期演进车载自组织网络（LTE-V）的抽象视图，并提出了分析模型以获取其可靠性和生存性指标。各种随机建模技术（例如半马尔可夫过程，可靠性框图和马尔可夫链）用于开发这些模型。LTE-V网络的可靠性是通过可靠性框图获得的。除了可靠性之外，还应考虑通道的可用性，以提高网络性能。为了实现该目的，还获得了诸如在可靠性模型的各种状态下阻塞和丢弃服务请求的概率之类的措施。开发了一个两级分层模型来获取这些度量，其中上层是充当马尔可夫奖励模型的可靠性模型，下层是信道可用性的性能模型。除了可靠的网络之外，还需要容错网络来满足用户的较高期望。因此，还评估了LTE-V网络的各种生存能力度量，这些度量描述了硬件故障和信道不可用对性能度量的影响。此外，还获得了由于硬件故障而丢失的服务请求的平均数量，作为性能指标。为了证明我们方法的可行性，提出了所建议模型的数字说明。数值结果也通过仿真验证。