Article Preview
TopConsiderable researches have been carried out to find a stable data dissemination infrastructure in highly mobile and sparsely connected VANETs environments (Chen, Kung, & Vlah, 2001; Wu, Fujimoto, Guensler, & Hunte, 2004; Zhao, Zhang, & Cao, 2007; Zhao & Cao, 2008). Nadeem, Shankar, and Iftode (2006) formulate a data push communication model for vehicle to vehicle communication without any road side infrastructure support. Zhang, Zhao, and Cao (2010) provide a single RSU-based VANETs model which maintains both upload and download queues and try to get the service balance among them. Yi, Bin, Tong, and Wei (2008) provide a mesh RSUs infrastructure based VANETs on both space and time dimensions and formulate reliability and fairness based algorithms. Ali, Chan, and Li (2011) analyze the performance of different on-demand scheduling algorithms for incorporating upload queue with download queue in RSU-based VANETs. Chen, Cao, Zhang, Xu, and Sun (2009) study the performance of the effectiveness of certificate revocation distribution in VANETs with and without enabling vehicle to vehicle communication. Liu and Lee (2010) analyze dynamic traffic characteristics in RSU-based VANETs. They propose to use different channels to disseminate different types of data and apply push and pull data dissemination technique based on the volume of requests at RSU server.