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Patent
Wuhan Research Institute Of Posts And Telecommunications | Date: 2012-12-28

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.


Patent
Wuhan Research Institute Of Posts And Telecommunications | Date: 2011-11-24

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.


Patent
Wuhan Research Institute Of Posts And Telecommunications | Date: 2011-12-29

A system and method for generating an optical comb are provided. The system comprises at least one modulator for modulating a continuous wave sequentially by using at least one signal, respectively so as to generate a comb wave having a first plurality of subcarriers; and a nonlinear medium for causing the respective subcarriers of the comb wave to perform four-wave mixing to thereby generate a comb wave having a second plurality of subcarriers as the optical comb. With the present system and method, an ultra-wide spectrum optical comb with stable frequencies may be generated.


Patent
Wuhan Research Institute Of Posts And Telecommunications | Date: 2015-10-27

The present disclosure relates to a dual-channel orthogonal carriers assisted optical signal transmitting device, and a direct detection method and a direct detection system using the dual-channel orthogonal carriers assisted optical signal. The direct detection system using the dual-channel orthogonal carriers assisted optical signal comprises a transmitting device and a receiving device. The transmitting device is configured to generate and transmit a dual-channel orthogonal carriers assisted optical signal to be detected, wherein the dual-channel orthogonal carriers assisted optical signal is modulated with a modulation signal. The receiving device is configured to receive the dual-channel orthogonal carriers assisted optical signal, and recover amplitude and phase information of the modulation signal based on the dual-channel orthogonal carriers assisted optical signal.


Patent
Wuhan Research Institute Of Posts And Telecommunications | Date: 2013-03-08

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.

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