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Class 398/99 - Multiple access (e.g., TDMA, CSMA)


Subclass of Class 398 - Optical communications
Definition: Subject matter wherein stations use a protocol to obtain
No. of patents: 131
Last issue date: 05/29/2012


1        
NumberTitleIssue Date
8190029Bandwidth allocation method, optical line terminator, optical network unit, communication system, and recording medium recording program of device
An object of the present invention is to increase the bandwidth use efficiency without requiring costly and fast integrated circuits or CPUs in the control unit even in a large-scale system with a large number of ONUs. An optical network unit includes an allocating ...
05/29/2012
8078058Ultra high-speed adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates
The present invention relates to an adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates and/or multiple communication protocols. By performing a real-time pulse width compression on an original electronic or optica...
12/13/2011
8078057Centralized congestion avoidance in a passive optical network
In one aspect, a method for congestion avoidance in a passive optical network having an optical line terminal communicatively connected to a plurality of optical network termination devices is provided. A dynamic bandwidth allocation information is periodically requ...
12/13/2011
7970281System and method for managing different transmission architectures in a passive optical network
In accordance with the teachings of the present invention, a system and method for managing different transmission architectures in a passive optical network (PON) is provided. In a particular embodiment, a method for managing different transmission architectures in...
06/28/2011
7437076Data transmission method in gigabit ethernet passive optical network
Disclosed is a upstream data transmission method in a gigabit Ethernet-passive optical network (GE-PON) system. In the GE-PON system including an optical line termination having a scheduler and optical network units connected to the optical line termination, the opt...
10/14/2008
7421203Method for transmitting packet in wireless access network based on wavelength identification code scheme
A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a...
09/02/2008
7412169FTTH system for convergence of broadcasting and communication through switched broadcasting
A fiber to the home FTTH network for convergence of broadcasting and communication is disclosed. The network includes: an OLT for receiving and converting a first predetermined number of broadcast signals and an Ethernet signal into a plurality of converted optical ...
08/12/2008
7408955Gigabit ethernet passive optical network system and media access control method for the same
A GE-PON (Gigabit Ethernet Passive Optical Network) system and media access control method for the same are disclosed. In the GE-PON system, by employing MAC attributes of the gigabit Ethernet frames, an OLT (Optical Line Termination) transmits a downstream window c...
08/05/2008
7409114Optical modulator
An optical modulator using a thin plate including a portion having 20 μm or less thickness, capable of selecting a specific polarized wave from a light wave which propagates in an optical waveguide in the modulator without reduced productivity. The modulator includ...
08/05/2008
7398021Optical transmitter and passive optical network using the same
An optical transmitter including a multi-lambda source to output injection light consisting of a plurality of injection wavelengths in channels, a circulator having a first port, a second port, and a third port, the circulator receiving the injection light at the fi...
07/08/2008
7394985Wavelength access server (WAS) architecture
A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,...
07/01/2008
7389047Optical ring transmission network
The network comprises an optical ring link (F) and a concentrator (HUB) that sends via one end of the link “downlink” optical signals carried by respective wavelengths and receives “uplink” optical signals via the other end of the link. The link is divided i...
06/17/2008
7389048Optical wavelength-division multiple access system and optical network unit
The present invention provides an optical wavelength-division multiple access system and a corresponding optical network unit. A wavelength band Da (wavelengths λd1 to λdn) for downlink optical signals corresponding to the n ONUs, a wavelength band Ua (wave...
06/17/2008
7386236Multiple wavelength TDMA optical network
A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time division multiple access (TDMA) protocol. The upstream TDMA traffic ther...
06/10/2008
7382982Ethernet passive optical network for integrating broadcast and communication based on time division multiplexing scheme
An Ethernet-PON integrates broadcast/communication through time division multiplexing, which provides users with high-speed, high-volume communication data and high-quality, real-time digital broadcast/image data. An OLT performs a switching operation on a plurality...
06/03/2008
7373084Optical network termination device for use in passive optical network based on WDM/SCM scheme
A termination device for use in a WDM-SCM PON system can effectively support a multi-channel integration function of a WDM/SCM PON system. The termination device contained in a termination end of a WDM/SCM (Wavelength Division Multiplexing/Sub-Carrier Multiplexing) ...
05/13/2008
7369771Optical network terminator and optical network connection method using it
An optical network terminator of the present invention includes an optical wavelength division multiplexer for receiving an optical signal and incoherent light. An optical detection unit converts a downstream high speed and low speed optical signals into electrical ...
05/06/2008
7369769Ethernet passive optical network ring and its method of authorization and collision detection
An Ethernet passive optical network (EPON) ring for providing protection against fiber failures. The optical network unit (ONU) is coupled to the ring fiber by a three-port passive optical splitting module that has three two-way optical passages. By the three two-wa...
05/06/2008
7366423System having multiple agents on optical and electrical bus
A system includes multiple agents coupled to an optical bus for transmission of high speed signals and to an electrical bus for transmission of low speed signals. The agents can be memory modules, such as DIMMs. An optical connector housing for coupling the agent to...
04/29/2008
7366417Delivering multicast services on a wavelength division multiplexed network using a configurable four-port wavelength selective crossbar switch
A method and a system in which selected wavelengths of a wavelength division multiplexed (WDM) signal are modulated with multicast data for multicasting data services on an optical network. The WDM signal is received from a hub node of the optical network, such as a...
04/29/2008
7356209Method and apparatus for optically powering and multiplexing distributed fiber optic sensors
An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of tha...
04/08/2008
7352972Method and apparatus for the zonal transmission of data using building lighting fixtures
This invention relates to the zonal transmission of data by radio means and optionally by optical means through the modulation of light from common building light fixtures, including the light output of fluorescent, mercury vapor, and other arc or discharge lamps an...
04/01/2008
7349158Diffraction grating-based encoded micro-particles for multiplexed experiments
Microparticles 8 includes an optical substrate 10 having at least one diffraction grating 12 disposed therein. The grating 12 having a plurality of colocated pitches Λ which represent a unique identification digital code that is detected...
03/25/2008
7340172Optical WDM-TDM network
An optical WDM-TDM network includes a plurality of devices, each of the devices including at least one optical add/drop device adapted to drop optical signals of at least one channel of a plurality of received channels and pass through the remaining channels, at lea...
03/04/2008
7333729Optical transmitter, optical receiver and optical transmission system using same
To resolve problems, with the invention, an optical transmitter comprises an encoder for generating an optical signal obtained by encoding multi-wavelength pulses corresponding to sending data by use of a method of time spread/wavelength hopping in accordance with a...
02/19/2008
7321730Method and apparatus for the transmission fault detection in an access network
An optical network unit (ONU) interconnected by passive optical network (PON) equipment to an optical line terminal (OLT) is identified using secondary modulation of the optical carrier to impress an identifier of the ONU onto the carrier. This resolves a recurring ...
01/22/2008
7319817System for transparent node for WDM shared “virtual ring” networks
A system and method for a transparent WDM metro ring architecture in which optics enables simultaneous provisioning of dedicated wavelengths for high-end user terminals, while low-end user terminals share wavelengths on “virtual rings”. All wavelengths are sourc...
01/15/2008
7292785Optical transmission system constructing method and system
An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the op...
11/06/2007
7292599Method for provisioning a permanent virtual circuit in an ATM network
A permanent virtual circuit (PVC) over an ATM network is provisioned by using a deterministic PVC addressing scheme for computing a unique combination of VPI and VCI values based on certain input parameters associated with the network to which the PVC is logically c...
11/06/2007
7286762Apparatus with spread-pulse modulation and nonlinear time domain equalization for fiber optic communication channels
A transmitter and transceiver for an optical communication channel may include a data encoder, a partial response (PR) precoder, a pulse filter, and an electrical-to-optical converter to transmit a spread pulse signal over an optical communication channel. The data ...
10/23/2007
7272321Passive optical network
A passive optical network. The optical network has an optical fiber ring with ends terminating at an optical line terminal. The optical line terminal transmits signals through the fiber ring to optical network units passively connected to the fiber ring. The optical...
09/18/2007
7263257Gires-Tournois etalons and dispersion compensation
A first embodiment of the invention provides a Gires-Tournois etalon (DGTE) 20 comprising a cladding mode suppressed optical fibre 22, including an etalon section 24 in which a weakly reflective optical waveguide grating 26 and a strongly...
08/28/2007
7263245Method and apparatus for optically powering and multiplexing distributed fiber optic sensors
An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of tha...
08/28/2007
7257326Method for allocating bandwidth for voice service in a Gigabit Ethernet passive optical network
Disclosed is a bandwidth allocation method for an optical line termination (OLT) in a Gigabit Ethernet passive optical network (GE-PON) having one OLT and a plurality of optical network units (ONUs) connected to the OLT. The method includes the steps of transmitting...
08/14/2007
7236708Optical communication system with optical output level control function
An optical communication system can increase a minimum optical reception level or the number of connectable optical receivers by controlling optical output levels of its optical transmitter. The optical communication system includes the optical transmitter having an...
06/26/2007
7224706Hitless re-routing in composite switches
A method of the grooming traffic signals through a composite switch is disclosed that enables a traffic signal that is being transmitted between any two constituent switches to be re-routed through the composite switch without a hit (i.e., the dropping, replacing, i...
05/29/2007
7200334System for transmitting digital signals in a space vehicle
The invention relates to a system for conveying digital signals inside a space vehicle between a transmitter and a receiver. In the invention, the link between the transmitter and the receiver comprises a first portion made of optical fiber and a second portion in w...
04/03/2007
7190522Chemical synthesis using diffraction grating-based encoded optical elements
An optical identification element having a synthesized chemical attached thereto includes an optical substrate having at least one diffraction grating disposed therein, the grating having a resultant refractive variation at a grating location, said grating being emb...
03/13/2007
7187867Optical wireless communication system
The present invention provides a bilateral communication network system, particularly, a optical wireless communication system communicating information frames via an optical node mounted on a mobile object and a plurality of optical repeaters connected to a wired n...
03/06/2007
7180903Resource management in uncoordinated frequency hopping system
A method and apparatus for communication using a plurality of time slots within a frequency spectrum is described. A fast frequency hopping traffic channel having a set of the plurality of time slots and a first set of hop carrier frequencies is established between ...
02/20/2007
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