| Patent application number | Description | Published |
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| 20090263127 | METHODS AND DEVICES FOR REDUCING POWER CONSUMPTION IN A PASSIVE OPTICAL NETWORK WHILE MAINTAINING SERVICE CONTINUITY - The present invention discloses methods for reducing power consumption in a PON while maintaining service continuity, the method including the steps of: providing an OLT operationally connected to at least one ONU; triggering a sleep request for at least one requesting ONU; upon receiving a sleep acknowledgement, activating a sleep mode for at least one requesting ONU according to a sleep period designated in the sleep request; and terminating the sleep mode according to the sleep period. Preferably, the sleep acknowledgement is transmitted from the OLT to the requesting ONU. Preferably, the sleep period is executed by a sleep command in the sleep acknowledgement. Preferably, the method further includes the step of: upon completion of the sleep period, transmitting buffered data traffic from the OLT to a sleeping ONU. Preferably, the step of transmitting is performed without the sleeping ONU being re-registered and without causing packet reordering. | 10-22-2009 |
| 20110013904 | PASSIVE OPTICAL NETWORK (PON) IN-BAND OPTICAL TIME DOMAIN REFLECTOMETER (OTDR) - An in-band OTDR uses a network's communication protocols to perform OTDR testing on a link. Because the OTDR signal (probe pulse) is handled like a data signal, the time required for OTDR testing is typically about the same as the time required for other global network events, and is not considered an interruption of service to users. A network equipment includes an optical time domain reflectometry (OTDR) transmitter and receiver, each operationally connected to a link to transmit and receive, respectively, an OTDR signal. When an OTDR is to be performed, a network device operationally connected to the link actuates the OTDR transmitter to transmit the OTDR signal on the link during a determined test time based on a communications protocol of the link, during which data signals are not transmitted to the network equipment. A processing system processes the OTDR signal to provide OTDR test results. | 01-20-2011 |
| Patent application number | Description | Published |
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| 20080260378 | Method of ethernet frame forward error correction initialization and auto-negotiation - A method of managing forward error correction (FEC) initialization and auto-negotiation in ethernet passive optical networks includes receiving FEC data from an optical network unit (ONU | 10-23-2008 |
| 20090304385 | METHODS AND APPARATUS FOR NEXT GENERATION ACCESS PASSIVE OPTICAL NETWORKS - Methods and apparatuses for controlling transmission of converged data packets and for media access through a single next generation access (NGA) passive optical network (PON) which can coexist with EPON and GPON based systems and can interoperate with a 10 GEPON. A converged data packet is transmitted between a first node and a second node of the NGA network under NGA management control. The converged packet has a format which unifies a GEM header with the 10 GEPON preamble header and certain fields replaced in a EPON packet format to accommodate information corresponding to the preamble elements of a GEM packet. The converged data can be encoded in the line code of the 10 GEPON protocol, allowing use of a control protocol based either on MPCP or GTC for the NGA. Node apparatuses include NGA elements which enable preparation, encoding/decoding and transmission of converged packets. | 12-10-2009 |
| 20100106959 | Triple and quadruple churning security for 1G and 10G PON - A data encryption-decryption method for enhancing the confidentiality of data transmitted between two, first and second communication network entities including the steps of: at the first network entity, performing a quadruple-churning operation on a byte N to obtain an encrypted byte N, the quadruple-churning operation including: performing a first churning operation to obtain a first churned output; bit-wise XORing the first churned output with two values to obtain a first XOR result; bit-swapping the first XOR result; performing a second churning and XORing stages to obtain a second XOR result; performing a third churning and XORing stages to obtain a third XOR result; bit swapping the third XOR result; and performing a fourth churning operation on the third bit-swapped XOR result to obtain encrypted byte N; and transmitting the encrypted byte N to the second network entity. | 04-29-2010 |
| 20100118753 | POWER SAVING IN IEEE 802-STYLE NETWORKS - A system and method for power saving in IEEE 802-style and ITU-T G.984-style networks overcomes the limitations of conventional techniques using information from user and network devices for initiating power savings by the user or network device, enabling power savings on links such as optical networks. This innovative technique provides a system and method for communications between user and network devices, facilitating either the user or network device initiating a sleep mode for the user device. The implementation of a sleep mode in a device allows powering down of the device's transmitter and receiver for a specified length of time, during which the transmitter and receiver (also referred to as the physical interface of the device) consume diminished power. | 05-13-2010 |
| 20100174901 | IMPLEMENTING IEEE 802.1AE AND 802.1af SECURITY IN EPON (1GEPON AND 10GEPON) NETWORKS - A method and system is provided for securing communication on an EPON. Particularly different types of encrypted messages, each with a respective short MAC SegTAG, may be sent from the OLT to an ONU and from an ONU to the OLT without need for a full SecTAG with an explicit SCI. Discovery and control messages may be encrypted and a security offset may be less than 30 bytes. A packet header including its MAC address may be encrypted. | 07-08-2010 |
| 20100208745 | OPERATIONS METHOD IN AN ETHERNET PASSIVE OPTICAL NETWORK THAT INCLUDES A NETWORK UNIT WITH MULTIPLE ENTITIES - A method for registration of multiple entities belonging to a specific optical networks unit (ONU). In one embodiment, the multiple entity registration method comprises checking by an optical line terminal (OLT) if a registration request message ( | 08-19-2010 |
