GPON-and-EPON transmission based on multi-standard OLT management structure for VPON in metro-access optical network

Based on multi-standard OLT management structure, this paper realizes supporting GPON and EPON simultaneously in metro-access optical network. To adjust VPON structure dynamically, virtual access mechanism is established. To support two different standards, compatible multi-standard management structure for VPONs is proposed. It can also manage dynamic connection between ONU and OLT. To transmit GPON and EPON frames in the same wavelength, this paper proposes shared bandwidth algorithm to allocate bandwidth to GPON and EPON sub-networks fairly. This algorithm can prevent bandwidth monopoly from high load sub-network, when load of one sub-network is much higher than that of the other. To further balance QoS demands for ONUs, different class services will acquire bandwidth by priority. Finally, the simulation results demonstrate a good performance of the mechanism and algorithm.