| Patent application number | Description | Published |
|---|
| 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 |
| 20110188849 | SYSTEM FOR REDUNDANCY IN ETHERNET PASSIVE OPTICAL NETWORKS (EPONS) - A system for redundancy in Ethernet passive optical networks (EPONs) facilitates fast recovery from failure (less than 50 msec), path redundancy of the fiber optic network, and location redundancy of the OLTs. An optical networking unit (ONU) in a normal state monitors input communications, and when the input communications are quiet for a predetermined minimum length of time, the ONU transitions to a lenient state in which: the ONU accepts old and new security keys; upon receiving a packet: the ONU updates an ONU timestamp based on the packet's timestamp; and the ONU transitions to the normal state of operation. While the ONU is in the lenient state if a packet is not received for a predetermined given length of time the ONU transitions to a deregistered state. In this system, main and standby OLTs do not require synchronization of security parameters or synchronization for differences in fiber lengths. | 08-04-2011 |
| 20110246861 | 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), and the optical line terminal (OLT) responds to the ONU with FEC data. Upon receiving data not forward error corrected from an ONU, the OLT responds with data not coded for FEC. Similarly, upon receiving forward error corrected data from the OLT, the ONU responds with forward error corrected data; and upon receiving data not forward error corrected from the OLT, the ONU responds with data not forward error corrected. The communications quality from the ONU is monitored, if the communications quality is not sufficient, the OLT transmits forward error corrected data to the ONU; otherwise, the OLT transmits non-FEC data to the ONU. Similarly, the method includes monitoring communications quality from the OLT by the ONU; if the communications quality is insufficient, the ONU transmits FEC data to the OLT; otherwise, the ONU transmits data not forward error corrected to the OLT. | 10-06-2011 |
