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When todayÂ¿s commuters in the train want to access broadband multimedia services. However, the classical solutions such as WLAN and UMTS are not sufficient to provide a high bandwidth to train users. In this paper, we discuss the RoF cell-cluster architecture in WDM/TDM hybrid-PON for train users. Also, we propose RoF cell-cluster architecture concept that can reduce the optical switching times and enlarge the coverage length of service.