Patent application number | Description | Published |
20100172257 | Internet Real-Time Deep Packet Inspection and Control Device and Method - A deep packet inspection and control device includes a first rule table unit for storing a rule table including a first set of rule entries which are pre-defined or generated dynamically; a first scanning unit for receiving a first real-time packet data stream from the internet, and scanning the first real-time packet data stream according to a scanning window defined by the first set of rule entries; a first analysis unit for matching the first real-time packet data stream with the first set of rule entries in the scanning window of the first scanning unit, and outputting a matching result; and a first rule linkage unit for performing linkage control on the first real-time packet data stream to be output back to the internet according to the matching result output from the first analysis unit. | 07-08-2010 |
20120141135 | Optical Communication System, Device and Method Employing Advanced Coding and High Modulation Order - A transmitting device, a receiving device, an optical communication system, and associated methods are provided. The transmitting device transmits an optical signal containing data, and comprises: an optical tone generator for generating at least one optical tone; at least one encoder for performing advanced coding on at least one data signal respectively, each of the at least one data signal carrying a part of the data; at least one mapper for performing high order modulation on the at least one coded data signal; and an up-converter for up-converting the at least one high-order-modulated data signal into the optical signal to be outputted through the at least optical tone. Thereby, high speed (e.g., over 1-Tb/s) transmission per single channel over a long-haul distance (e.g. over 1000-km) with error-free recovery may be achieved. | 06-07-2012 |
20120141138 | System, Devices and Methods for Subcarrier Recovery at Local Oscillator Frequency in Optical OFDM System - The invention provides methods, devices and a system for recovering the corrupted subcarrier at the local oscillator (LO) frequency in coherent optical OFDM transmission. The method includes performing advanced coding on a data signal to obtain an encoded signal; performing high order modulation on the encoded signal to obtain a high-order-modulated signal; performing OFDM modulation on the high-order-modulated signal to obtain an electrical OFDM signal; and performing up-conversion on the electrical OFDM signal to obtain an optical OFDM signal to be output. The inventive technique of employing advanced coding with low rate combining with higher order modulation can be used to reduce the decoding bit error ratio (bit error rate) level, so that the LO subcarrier can be fully recovered while the bandwidth of the transmitted signal may be substantially the same as the existing optical OFDM system, and there is no need to add any feedback control module or feedback loop support or the like to the existing optical OFDM system, so that the complexity of the receiving side can be reduced. | 06-07-2012 |
20120294618 | Reconfigurable Optical Add/Drop Multiplexer and Reconfigurable Optical Add/Drop Multiplexing Method - A reconfigurable optical add/drop multiplexer and a reconfigurable optical add/drop multiplexing method are provided. The reconfigurable optical add/drop multiplexer comprises: an optical processing unit for receiving a first optical signal containing a plurality of optical channels, processing the first optical signal to generate a second optical signal which is a part of the first optical signal, and outputting the second optical signal; and a coherent detection unit for performing a coherent detection on the second optical signal so as to separate from the second optical signal an optical channel contained therein, and outputting the optical channel. With the reconfigurable optical add/drop multiplexer and the reconfigurable optical add/drop multiplexing method, any number of degrees can be supported, and adding/dropping of an optical channel with any wavelength and any bandwidth to/from any direction can be achieved, so that requirements of being colorless, directionless, contentionless and gridless can be satisfied. | 11-22-2012 |
20130107341 | Modulation Device and Modulation Method, and Demodulation Device and Demodulation Method | 05-02-2013 |
20130121706 | SIGNAL TRANSMISSION AND RECEPTION DEVICE AND METHOD - A signal transmission and reception device and method are provided. The transmission method comprises generating multiple optical carriers from a basic optical carrier; modulating optical carriers, except for a predetermined optical carrier, in the optical carriers by using multiple data signals respectively, to generate multiple optical modulated signals; and synthesizing the multiple optical modulated signals and the predetermined optical carrier into a single optical signal, and transmitting the signal. The reception method comprises separating an optical signal into multiple optical carriers, the optical carriers having different frequencies and including a predetermined optical carrier; generating from the predetermined optical carrier multiple optical waves, frequencies of which correspond to frequencies of optical carriers, except for the predetermined optical carrier, in the multiple optical carriers; and demodulating the optical carriers, except for the predetermined optical carrier, in the multiple optical carriers by using the multiple optical waves respectively. | 05-16-2013 |
20130128742 | Internet Real-Time Deep Packet Inspection and Control Device and Method - A deep packet inspection and control device for performing real-time traffic management on a real-time packet data stream over the internet that includes a first rule table unit for storing a rule table including a first set of rule entries which are pre-defined or generated dynamically; a first scanning unit for receiving a first real-time packet data stream from the internet, and scanning the first real-time packet data stream according to a scanning window defined by the first set of rule entries; a first analysis unit for matching the first real-time packet data stream with the first set of rule entries in the scanning window of the first scanning unit, and outputting a matching result; and a first rule linkage unit for performing linkage control on the first real-time packet data stream to be output back to the internet according to the matching result output from the first analysis unit. | 05-23-2013 |
20130216231 | OPTICAL COMMUNICATION SYSTEM, TRANSMISSION APPARATUS AND RECEPTION APPARATUS, AND TRANSMISSION METHOD AND RECEPTION METHOD - An optical communication system, a transmission apparatus and a reception apparatus, and a transmission method and a reception method are provided. The transmission apparatus transmits an optical signal, and comprises: at least one encoder for encoding at least one data signal, respectively; at least one first modulator for performing first modulation on the at least one encoded data signal, respectively, and generating at least one first modulated signal; at least one second modulator for performing second modulation, which is DFT-spread-OFDM modulation, on the at least one first modulated signal, respectively, and generating at least one second modulated signal; and an up-converter for up-converting the at least one second modulated signal into the optical signal to be transmitted. Thus, a PAPR of the optical OFDM transmission signal is decreased, a signal distortion caused by non-linearity of optical devices is reduced, and a reception quality of the signal is improved. | 08-22-2013 |
20140037023 | TRANSMITTING SYSTEM AND RECEIVING SYSTEM, AND TRANSMITTING METHOD AND RECEIVING METHOD - A transmitting system, a receiving system, a transmitting method and a receiving method capable of implementing communications with multiple rates are described. The transmitting system comprises: a transmitting-side selection apparatus for selectively inputting input bit data to one of a first constellation mapping modulation apparatus and a second constellation mapping modulation apparatus based on a rate to be transmitted; the first constellation mapping modulation apparatus for performing a first constellation mapping modulation on the signal input thereto based on a selection made by the transmitting-side selection apparatus, so as to obtain a constellation-mapped signal; the second constellation mapping modulation apparatus for performing a second constellation mapping modulation on the signal input thereto based on the selection made by the transmitting-side selection apparatus, so as to obtain a constellation-mapped signal; and an OFDM modulation apparatus for performing an OFDM modulation on the constellation-mapped signal to obtain an OFDM-modulated signal for transmission. | 02-06-2014 |