53 results about "Multi point control protocol" patented technology

A method and apparatus for receiving burst data in an OLT of an EPON are provided. The method includes the steps of: a) receiving burst data from the plurality of ONUs; b) generating a multipoint control protocol (MPCP) LOS signal for reducing a synch time of the burst data; c) reducing the synch time in response to generation of the MPCP LOS signal; and d) recovering the received burst data by performing a code-group sort in a period where the MPCP LOS signal is not generated.

The invention discloses a user level protocol and QoS (Quality of Service) based dynamic wavelength bandwidth distribution method in a WDM-EPON (Wavelength Division Multiplexing-Ethernet Passive Optical Network). The user level protocol and QoS based dynamic wavelength bandwidth distribution method in the WDM-EPON comprises the steps of: extending a frame structure in an existing MPCP (Multi-Point Control Protocol) and enabling an OLT (Optical Line Terminal) to support multiple uplink wavelengths by using the extended MPCP; dividing services into three levels, .i.e., an EF service, an AF service and a BE service, wherein the EF service is firstly subjected to online real-time scheduling, and the bandwidth distributed to the EF service is a requested bandwidth and transmitted on an appointed wavelength; setting minimum guaranteed bandwidths for the AF and BE services based on the user levels (a high-level user, a middle-level user and a low-level user) and carrying out offline scheduling, to be specific, firstly, scheduling the AF / BE service of the senior user (first scheduling the AF service and then scheduling the BE service), and then scheduling the AF / BE services of the middle-level user and the low-level user according to the following sequence (the AF service of the middle-level user, the AF service of the low-level user, the BE service of the middle-level user and the BE service of the low-level user). According to the dynamic wavelength bandwidth distribution method, the time delay can be reduced, and the bandwidth utilization rate and the QoS of the user with high priority are improved.

One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system is configured with at least one redundant component for the OLT and / or ONUs, wherein the redundant component can be optical or electrical, and can be a port, line card or link. The system provides protection by detecting a failure, and switching automatically to the redundant components to reduce service disruption time. The protection switching comprises: preserving the existing configuration over the loss of at least one of a multiple-point control protocol (MPCP) message; an operations, administration and maintenance (OAM) message; and a signal on the physical layer. The system recovers from the failure without performing ONU discovery.

A method for detecting-eliminating fault of passive optical network system includes querying fault state information of system terminal by system office end through fault query field of message, reporting fault state to system office end by system terminal through query response field of message, analyzing fault state by office end device, sending forced power failure command to fault system terminal through forced power failure command field of message if that system terminal is fault is confirmed and automatically switching off power supply after command is received by fault system terminal.