摘要:
A wavelength division multiplexing passive optical network (WPON) comprising an optical line terminal (OLT) and a plurality of optical network units (ONUs) coupled to the OLT via a power optical splitter. The OLT is configured to monitor wavelengths in use by the ONUs and to divide upstream traffic from the ONUs into multiple channels using tunable filters. Also disclosed is an OLT for a PON, the OLT comprising a plurality of receivers and a plurality of tunable filters corresponding to each of the receivers. The OLT also comprises channel control logic coupled to the tunable filters, wherein the channel control logic is configured to detect a plurality of wavelengths in use for upstream traffic in the PON and to divide the upstream traffic into multiple channels using the tunable filters. Included is a method for managing upstream traffic in a PON, the method comprising monitoring, by a processor, wavelengths in use for upstream traffic in the PON. The method also comprises dividing the upstream traffic into multiple channels using tunable filters.
摘要:
A system and method for transmitting an optical signal. The system includes a first optical transmitter capable of transmitting a first optical signal under one or more first operating conditions, and the first optical signal corresponds to a first wavelength. Additionally, the system includes a second optical transmitter capable of transmitting a second optical signal under one or more second operating conditions, and the second optical signal corresponds to a second wavelength. Moreover, the system includes an optical multiplexer coupled to the first optical transmitter and the second optical transmitter and capable of generating a multiplexed optical signal, a detection component configured to determine at least whether the first optical transmitter satisfies one or more predetermined conditions, and a tunable optical transmitter capable of transmitting a third optical signal. The third optical signal corresponds to a third wavelength.
摘要:
A method for detecting a failure network terminal in a Passive Optical Network includes: changing timeslots assigned to potential failure network terminals one by one; and determining the failure network terminal according to uplink data frames sent by the potential failure network terminals whose timeslots are changed. Embodiments of the present invention also disclose an apparatus and system for detecting a failure network terminal. The solution of the present invention may detect which Optical Network Unit/Terminal (ONU/ONT) fails and perform the corresponding processing in accordance with embodiments of the present invention, which recovers the system health and improves the network security, stability and self-healing ability.
摘要:
A device and a method for detecting received optical power in an optical communication network, the device mainly including: an optical splitter for separating a part from an uplink optical signal received by an optical receiver in the optical communication network and transferring the part of optical signal to a photoelectric converter; the photoelectric converter for converting the received optical signal transferred from the optical splitter into a current or voltage signal and transferring the current or voltage signal to a logic control circuit; and the logic control circuit for judging the received current or voltage signal transferred from the photoelectric converter according to a set threshold to determine whether the received optical power of the optical receiver in the optical communication network overloads, and for outputting a corresponding control signal.
摘要:
This invention is directed to compounds of formula (I): where r, q, R, R2, R3, R4a, R4b, R4c, R5a, R5b, R5c, R6a, R6b, R6c, R7, R8, R9 and R10 are described herein, or pharmaceutically acceptable salts, solvates, polymorphs, ammonium ions, N-oxides or prodrugs thereof; which are leukotriene A4 hydrolase inhibitors and which are therefore useful in treating inflammatory disorders. Pharmaceutical compositions comprising the compounds of the invention and methods of using and preparing the compounds of the invention are also disclosed.
摘要:
This invention is directed to acyl piperazine derivatives which are useful as anti-inflammatory agents. This invention is also directed to pharmaceutical compositions containing the compounds of the invention, and methods of using the compounds to treat inflammatory disorders in humans.
摘要:
Compounds of the following formula: where m, n, R1, R2, R3, R4 and R6 are described herein, are useful as inhibitors of platelet adenosine diphosphate. Pharmaceutical compositions containing these compounds, methods of using these compounds as antithrombotic agents and processes for synthesizing these compounds are also described herein.
摘要:
A wavelength division multiplexing passive optical network (WPON) comprising an optical line terminal (OLT) and a plurality of optical network units (ONUs) coupled to the OLT via a power optical splitter. The OLT is configured to monitor wavelengths in use by the ONUs and to divide upstream traffic from the ONUs into multiple channels using tunable filters. Also disclosed is an OLT for a PON, the OLT comprising a plurality of receivers and a plurality of tunable filters corresponding to each of the receivers. The OLT also comprises channel control logic coupled to the tunable filters, wherein the channel control logic is configured to detect a plurality of wavelengths in use for upstream traffic in the PON and to divide the upstream traffic into multiple channels using the tunable filters. Included is a method for managing upstream traffic in a PON, the method comprising monitoring, by a processor, wavelengths in use for upstream traffic in the PON. The method also comprises dividing the upstream traffic into multiple channels using tunable filters.
摘要:
A system and method for transmitting an optical signal. The system includes a first optical transmitter capable of transmitting a first optical signal under one or more first operating conditions, and the first optical signal corresponds to a first wavelength. Additionally, the system includes a second optical transmitter capable of transmitting a second optical signal under one or more second operating conditions, and the second optical signal corresponds to a second wavelength. Moreover, the system includes an optical multiplexer coupled to the first optical transmitter and the second optical transmitter and capable of generating a multiplexed optical signal, a detection component configured to determine at least whether the first optical transmitter satisfies one or more predetermined conditions, and a tunable optical transmitter capable of transmitting a third optical signal. The third optical signal corresponds to a third wavelength.
摘要:
Piperidine derivatives of the following formulae I and II: and their pharmaceutically acceptable salts, which are functional antagonists of the CC chemokine receptor CCR1 and are thus useful as anti-inflammatory agents, a pharmaceutical compositions containing said piperidine derivatives or their pharmaceutically acceptable salts, and methods of their use.