Patent application number | Description | Published |
20080199180 | OPTICAL NETWORK TERMINAL AND A MESSAGE PROCESSING METHOD, A MESSAGE PROCESSING APPARATUS AND SYSTEM THEREOF - The present invention discloses a message processing method of optical network termination (ONT), including: the ONT receiving an uplink message; the ONT performing a corresponding VLAN tagging operation in accordance with the characteristic value of the uplink message, wherein at least two types of uplink messages with different characteristic values have different VLAN Tags after the uplink messages are processed by the ONT. The present invention also discloses a VLAN Tag processing apparatus, an optical network termination (ONT), and a passive optical network system, which enable subsequent network devices to process the messages from the ONT in diverse ways. | 08-21-2008 |
20090010642 | METHOD FOR MEASURING FIBER LENGTH, OPTICAL LINE TERMINAL AND OPTICAL NETWORK SYSTEM - A method for measuring fiber length, an optical line terminal and an optical network system. The method for measuring fiber length according to the embodiment of the present invention includes the following steps: Sending the first message to an optical network device at the subscriber side; —Receiving the second message, which is a response returned by the optical network device at the subscriber side to the first message; —Determining the duration between sending the first message and receiving the second message; Calculating the length of the fiber to the optical network device at the subscriber side according to the above-mentioned duration and the information related to the processing delay of the optical network device at the subscriber side, wherein the information related to the processing delay of the optical network device at the subscriber side includes the actual response time of the optical network device at the subscriber side. | 01-08-2009 |
20090022494 | OPTICAL NETWORK TERMINAL, METHOD FOR CONFIGURING RATE LIMITING ATTRIBUTES OF PORTS, AND METHOD FOR PROCESSING PACKETS - The present invention relates to an optical network terminal (ONT), a method for configuring rate limiting attributes of ports, and a method for processing packets. The ONT includes a passive optical network (PON) protocol processing module, and a user network interface (UNI) module, which are connected through an internal interface. The ONT also includes a port rate limiting module connected to a UNI. The port rate limiting module stores rate limiting attributes, and the ONT uses these attributes to control the traffic of the UNI. The port rate limiting attributes are configured for the ONT through an ONT management and control interface (OMCI) message of an optical line terminal (OLT). In this way, when the ONT receives data from the UNI, it can control the traffic of the UNI according to the port rate limiting attributes. The present invention enables the port rate limiting function for the ONT, prevents overflow of the internal receiving buffer of the ONT, and prevents denial of service (DoS) attacks from illegal users. | 01-22-2009 |
20090092388 | METHOD, OPTICAL NETWORK AND NETWORK DEVICE FOR LOCATING FIBER EVENTS - A method for locating fiber events and an optical network and network device are provided. The method for locating fiber events includes: determining the distance between an event and an OLT, measuring the optical loss of the optical channel between the OLT and an ONU or ONT at the peer end of the measured fiber link, and, according to the measured optical loss of the optical channel, judging whether the event occurs on the measured fiber link, and if so, determining the location of the event on the measured fiber link according to the distance between the event and the OLT. | 04-09-2009 |
20090154920 | ETHERNET SERVICE CONFIGURATION DEVICE, METHOD, AND SYSTEM IN PASSIVE OPTICAL NETWORK - An Ethernet service configuration device, method, and system in a passive optical network (PON) are provided. The device includes a PON protocol processing module, an Ethernet module, and at least one service module based on Ethernet which are sequentially connected. The Ethernet module includes a media access control (MAC) bridge port configuration data management entity (ME) and an Ethernet service end node ME connected with each other. The service module based on Ethernet includes at least one non-Ethernet service functional end node ME correlated with the Ethernet service end node ME. According to the device, method, and system, the coupling between Ethernet service configuration and all kinds of service and/or device configurations based on Ethernet is reduced, which is propitious to the ONT maintenance and modularization configuration. | 06-18-2009 |
20090269053 | METHOD AND APPARATUS FOR DETECTING PASSIVE OPTICAL NETWORK FAILURES, AND PASSIVE OPTICAL NETWORK SYSTEM THEREOF - A method and apparatus for detecting Passive Optical Network (PON) failures, and a PON system are provided to obtain the monitoring information of a peer device before a PON system failure occurs. The method includes: obtaining monitoring information of an Optical Line Terminal (OLT) and an Optical Network Unit (ONU); and determining a failure of a passive ONU according to the obtained monitoring information of the OLT and the ONU. The monitoring information of the peer device is obtained before a PON system failure occurs. Thus the failure is discovered in time, quick troubleshooting is ensured, and the costs of system maintenance are reduced. | 10-29-2009 |
20100196006 | METHOD, SYSTEM AND DEVICE FOR OPTICAL NETWORK TERMINATION CONFIGURATION - A method for optical network termination (ONT) configuration is provided. The method includes: obtaining, by an optical line terminal (OLT), service types supported by an ONT and management methods available for each of the service types; and negotiating, by the OLT, with the ONT according to the management methods available for each of the service types, so as to determine a management method to be adopted for each of the service types, and configuring the ONT according to the determined management method. | 08-05-2010 |
20100221000 | METHOD AND DEVICE AND COMMUNICATION SYSTEM FOR MEASURING OPTICAL POWER - A method for measuring an optical power includes: acquiring code type information in an optical signal of a communication system, in which the optical signal includes an optical signal of burst emission and/or an optical signal of burst reception; measuring the optical signal of the communication system, and acquiring an optical power value of the optical signal; and correcting the optical power value according to the code type information. | 09-02-2010 |
20110274426 | DETECTING METHOD, APPARATUS, AND SYSTEM IN AN OPTICAL DISTRIBUTION NETWORK - A detecting method, an apparatus, and a system in an Optical Distribution Network (ODN) are provided. The method includes: an Optical Line Termination (OLT) reserves a test window, and an Optical Network Unit (ONU) stops sending an uplink signal in the test window, the OLT emits a downlink test signal having a wavelength the same as that of the uplink signal in the test window, the OLT receives backward signals of the downlink test signal, in which the backward signals include a backward scattered signal and a backward reflected signal, processes the backward signals, and obtains state information of the ODN according to the backward signals. The method does not need to add other hardware, and the downlink signal is sent normally in the downlink. The implementation is low in the cost and easy in the technology. | 11-10-2011 |
20120008939 | METHOD FOR IDENTIFYING AN OPTICAL NETWORK UNIT AND AN OPTICAL ACCESS SYSTEM AND DEVICE - The present invention discloses a method for identifying an optical network unit (ONU) in an optical access system, including: receiving uplink signals sent by a plutality of ONUs through a shared optical transmission path; extracting detection signals from the uplink signals, and obtaining signal characteristics of the detection signals; and comparing the signal characteristics with a reference characteristic value, and determining, according to a result of the comparison, whether the multiple ONUs that send the uplink signals include a point-to-point connection-based (P2P) ONU. Through the method for identifying an ONU in an optical access system, when P2P ONU is mistakenly connected into a point-to-multipoint (P2MP) connection-based optical access system, a fault alarm can be raised quickly, which facilitates system maintenance and troubleshooting. The present invention further discloses an optical access system, an optical line terminal, and an optical module. | 01-12-2012 |
20120237213 | METHOD, APPARATUS AND SYSTEM FOR TESTING AN OPTICAL NETWORK - Embodiments of the present disclosure describe a method and an apparatus for testing an optical network, which may be applicable to an integrated OTDR and the field of optical network technologies. The method includes obtaining a maximum test time of a single group test; dividing a total test time into at least two groups of single group test time that is not greater than the maximum test time when the total test time is greater than the maximum test time of the single group test; performing the single group tests in sequence according to each single group test time; and instructing optical network equipment to restore to a normal working state when the single group test time corresponding to each single group test ends. | 09-20-2012 |
20130195443 | TIME SYNCHRONIZATION METHOD, DEVICE, AND SYSTEM - The present disclosure provides a time synchronization method, including: acquiring, by a slave device, a first optical fiber transmission delay from a master device to the slave device, and a second optical fiber transmission delay from the slave device to the master device; exchanging a time synchronization signal with the master device, and calculating an initial time offset; adjusting the initial time offset by using the first optical fiber transmission delay and the second optical fiber transmission delay to obtain a corrected time offset; and adjusting a local clock according to the corrected time offset. Embodiments of the present disclosure further provide a corresponding device and system. | 08-01-2013 |
20140097756 | Method and Apparatus for Controlling Optical Power - A method can be used for controlling optical power. Output optical power of an optical source is monitored and it is determined whether a preset test control signal is received. When the preset test control signal is not received, a data signal is modulated to output light of the optical source and a bias current of the optical source is adjusted according to an output optical power monitoring result of the optical source to implement automatic power control. When the preset test control signal is received, a test is started and a test signal is superimposed to the data signal to form a superimposed signal. The superimposed signal is modulated to the output light of the optical source. The output optical power monitoring result of the optical source is ignored during the test period to maintain the bias current of the optical source at a preset target value. | 04-10-2014 |
20140178070 | METHOD, SYSTEM AND DEVICE FOR OPTICAL NETWORK TERMINATION CONFIGURATION - A method for optical network termination (ONT) configuration is provided. The method includes: obtaining, by an optical line terminal (OLT), service types supported by an ONT and management methods available for each of the service types; and negotiating, by the OLT, with the ONT according to the management methods available for each of the service types, so as to determine a management method to be adopted for each of the service types, and configuring the ONT according to the determined management method. | 06-26-2014 |