The invention relates to certain compounds or pharmaceutically acceptable salts, solvates, clathrates, or prodrugs thereof, that are useful as immunosuppressive agents and for treating and preventing inflammatory conditions, allergic disorders, and immune disorders.

Compounds for inflammation and immune-related uses

A method for transmitting video data to the users via a network in a transcoder of an image processing system including a storage media having a predetermined amount of storage area is disclosed. The method includes the steps of storing in the storage media, the video data provided based on the corresponding services, monitoring a traffic condition of the network to determine if transcoding is necessary; transmitting the stored video data to the corresponding users, respectively, via the network, when the transcoding is not necessary; and transcoding the stored video data to transmit the video data to the corresponding users, respectively, when the transcoding is necessary. The video data provided is based on the corresponding services includes image information having the highest quality of service from a content provider.

Optical network for bi-directional wireless communication

Apparatus and methods for enhanced tuner efficiency, wherein tuner resources function to permit multiple content streams to be demultiplexed and thus made available for subsequent display. In one embodiment, Customer Premises Equipment (CPE) comprises a resource manager on which a guide application is run to control the tuning of an available tuner resource. This approach obviate reliance on OCAP or other proprietary vendor architecture applications. In another variant, the CPE is adapted to receive RF source data from a wideband tuner, or multiple tuners. The CPE may also be utilized in conjunction with other system configurations designed to enforce a security or other policies within a premises network. The CPE may also employ ‘look ahead’ capabilities to anticipate a QAM stream content before it is received.

Multi-stream premises apparatus and methods for use in a content-based network

In a PON system with WDM, at the time of initial setting, each ONU negotiates with an OLT, and automatically acquires a wavelength which can be used by the ONU. One wavelength for negotiation of assigned wavelength is fixed as a default, and a newly connected ONU first uses the wavelength. The OLT 200 includes a plurality of light sources for downstream communication. The ONU 300 includes a wavelength variable filter selectively receiving one of wavelengths of downstream communication, and a wavelength variable light source selectively emitting light of one of plural wavelengths for upstream communication. The ONU 300 uses a transmission wavelength (for example, λu32) for negotiation and transmits a wavelength assignment request 1000 to the OLT 200. The OLT 200 selects a wavelength λu1 to be assigned from unused wavelengths, and transmits wavelength information to the ONU 300. The OLT 200 and the ONU 300 communicates using the notified wavelengths.

Passive optical network system and wavelength assignment method

The present invention discloses a low-cost light source for optical transmission systems and optical networks based on wavelength-division multiplexing (WDM) technology. A light source in accordance with the present invention is implemented by externally injecting a narrow-band incoherent light into a Fabry-Perot laser diode (F-P LD). After injection of narrow-band incoherent light, the output of F-P LD becomes wavelength-selective rather than multi-mode and the output wavelength of F-P LD coincide with the peak wavelength of the injected incoherent light. Multi-channel WDM light sources according to the present invention can be implemented using a single broadband incoherent light source and plurality of F-P LDs. An optical transmission system for upstream signal transmission in an passive optical network using the light source according the present invention is also disclosed.

Low-cost wdm source with an incoherent light injected fabry-perot laser diode

Disclosed is a wavelength division multiplexing-passive optical network (WDM-PON) that enables the integration of broadcast and communication data, in which digital broadcasting and communication services are integrated and transmitted using WDM. An optical line terminal, connected to a broadcasting network and an Internet protocol network, receives a digital broadcast signal from the broadcasting network and a first communication signal from the IP network, and transmits them as a single (broadcast/communication) integrated optical signal after their photoelectric conversion, and further transfers a second communication signal from a service user to the IP network. An optical network terminal/optical network unit on the user side transfers the integrated optical signal from the optical line terminal to the user, and transfers channel-information data of a digital broadcast desired by the user and user data including the second communication signal from the user to the optical line terminal. A first WDM demultiplexer WDM-demultiplexes the single signal and transfers it to the optical network terminal/optical network unit. A first WDM multiplexer WDM-multiplexes the user data and transfers it to the optical line terminal.

Wavelength division multiplexing-passive optical network capable of integrating broadcast and communication services

PROBLEM TO BE SOLVED: To provide a passive optical subscriber network of a broadcast/communication integrable wavelength division multiplex system in which the wavelength division multiplex system is utilized to merge and transmit digital broadcast services and communication services. SOLUTION: The passive optical subscriber network of the wavelength division multiplex system includes an OLT 31 for receiving a digital broadcast signal from a broadcast network and a first communication signal from an IP network and applying electric/optical conversion to transmit these signals as one broadcast/communication integrated optical signal, an ONT/ONU 32 that is a user side apparatus for transmitting the broadcast/communication integrated optical signal from the OLT to a service user and transmitting user data from the service user to the OLT, a first WDM demultiplexer for applying WDM demultiplexing to the broadcast/communication integrated optical signal from the OLT for transmission to the ONT/ONU, and a first WDM multiplexer for applying WDM multiplexing to the user data from the ONT/ONU for transmission to the OLT. COPYRIGHT: (C)2005,JPO&NCIPI

Passive optical subscriber network of broadcast/communication integrable wavelength division multiplex system

PURPOSE: A wavelength division multiplexing -passive optical network capable of combining broadcasting and communication by using the WDM(Wavelength Division Multiplexing) method are provided to combine a digital broadcasting service and a communication service by using the WDM method. CONSTITUTION: An OLT(Optical Line Terminal) which is connected to a broadcasting network for providing a digital broadcasting service and an IP network for providing a communication service combines a digital broadcasting signal and the first communication signal and transmit the second communication signal of a service user to the IP network. An ONT/ONU(Optical Network Terminal/Optical Network Unit)(32) transmits the combined signal from the OLT to the service user and transmits channel information data of the digital broadcasting and user data including the second communication data to the OLT. A first WDM demultiplexer(33) is used for performing a WDM demultiplexing process for the combined signal of the OLT and transmitting the demultiplexed signal to the ONT/ONU. A first multiplexer(34) is used for performing a WDM multiplexing process for the user data and transmitting the multiplexed data to the OLT.

Wavelength division multiplexing -passive optical network capable of combining broadcasting and communication by using the wdm method, in which wdm-pon structure is provided

Gi Cheol Lee

Papers

Wavelength division multiplexing-passive optical network capable of integrating broadcast and communication services

Passive optical subscriber network of broadcast/communication integrable wavelength division multiplex system

Wavelength division multiplexing -passive optical network capable of combining broadcasting and communication by using the wdm method, in which wdm-pon structure is provided