A slotted counter rotating metropolitan area ring network

In this paper, we propose and analyze a new architecture for metropolitan area networks (MANs). The architecture is based on ring topology and is called counter rotating slotted ring (CRSR). The proposed MAN (CRSR) has a dual-ring architecture and consists of two unidirectional transmission media that are shared among all network users. The information is transmitted by using fixed size slots. The flow of information in two rings is in the opposite direction. As each user is connected to both the rings, each user has two possible routes to send the information to a desired destination. The evaluation of CRSR under various conditions is also presented in this paper. Simulation and analytical modeling are used for evaluating the proposed MAN architecture. The results show that CRSR provides better performance in comparison with other similar MANs.