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38results about How to "Increased hardware resources" patented technology

Method and device for realizing Openflow multistage flow table

InactiveCN103401783AReduce the number of loopbacksImprove search speedData switching networksOpenFlowComputer science
The invention discloses a method and a device for realizing an Openflow multistage flow table. The method comprises the following steps of receiving and analyzing a message to acquire the attribute of the message and carrying out sequential search on at least one-stage flow stage according to the attribute of the message; after the message matching of the last-stage flow table in the sequential search is finished, judging whether to carry out the matching of the next-stage flow table or not, if so, transmitting the message into an ingress port preserved inside a chip through a chip roundtrip channel and carrying out the search of the next-stage flow stable, and otherwise, directly processing the message according to the matched flow behavior. According to the method and the device disclosed by the invention, by combining an Openflow processing mechanism with a roundtrip mechanism, the matching of the multi-stage flow table is realized by one-time roundtrip, so that the roundtrip times of the message are reduced, the utilizable bandwidth is increased, the matching of the Openflow multistage flow table is realized, the search speed of the message is increased and the forwarding of the message is facilitated. In addition, the ever-increasing demand on network application can be met.
Owner:SUZHOU CENTEC COMM CO LTD

Capacitance-type inertial sensor digital servo circuit

The present invention provides a capacitance-type inertial sensor digital servo circuit. The capacitance-type inertial sensor digital servo circuit comprises a capacitance-type sensor, a reading-out amplification circuit, an analog-digital converter (ADC), a digital loop filter, a multi-digit quantizer and a pulse-width modulation generator. The capacitance-type sensor, the reading-out amplification circuit, the analog-digital converter (ADC), the digital loop filter, the multi-digit quantizer and the pulse-width modulation generator are connected in order and form a loop. Through adoption of the digital loop filter, the capacitance-type inertial sensor digital servo circuit is high in flexibility and accuracy; through adoption of the multi-digit quantizer, the capacitance-type inertial sensor digital servo circuit realizes multi-digit quantification and has small quantification noise, high linearity and high duty ratio; and moreover, through adoption of the pulse-width modulation generator, the capacitance-type inertial sensor digital servo circuit generates differential force feedback control signals to realize multi-digit force feedback control so as to greatly reduce the nonlinearity introduced by a common analog-digital converter (DAC) and improve the inhibition capability for common-mode noise.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI

Network communication system and method based on TCP/IP communication protocol

ActiveCN106375324AIncreased hardware resourcesSolve the defects that cannot satisfy large-scale user connectionsTransmissionClient-sideDistributed computing
The invention provides a network communication system based on a TCP/IP communication protocol. The network communication system comprises a server and at least one client side; the server is used for creating a dynamic chain table; the dynamic chain table comprises a head node and a plurality of child nodes; starting from the head node, the nodes are sequentially connected in series through a pointer field next, so that the dynamic chain table is formed; the server judges whether a communication event is triggered at the client side or not by calling an epoll_wait function; if so, the server quits the epoll_wait function, and traverses and processes the communication event; and if not, a blocking mode is adopted to wait for the triggering of the communication event at the client side. According to the network communication system disclosed by the invention, by utilization of an epoll server communication model, online and offline states of the client side, communication between the client side and the server, and communication between the client side and another client side can be realized through the dynamic chain table; the defect that large-scale user connection cannot be satisfied by a general server can be solved; and furthermore, the memory utilization rate of the server is increased by utilization of computer hardware resources.
Owner:SHENZHEN INST OF ADVANCED TECH

A Capacitive Inertial Sensor Digital Servo Circuit

The present invention provides a capacitance-type inertial sensor digital servo circuit. The capacitance-type inertial sensor digital servo circuit comprises a capacitance-type sensor, a reading-out amplification circuit, an analog-digital converter (ADC), a digital loop filter, a multi-digit quantizer and a pulse-width modulation generator. The capacitance-type sensor, the reading-out amplification circuit, the analog-digital converter (ADC), the digital loop filter, the multi-digit quantizer and the pulse-width modulation generator are connected in order and form a loop. Through adoption of the digital loop filter, the capacitance-type inertial sensor digital servo circuit is high in flexibility and accuracy; through adoption of the multi-digit quantizer, the capacitance-type inertial sensor digital servo circuit realizes multi-digit quantification and has small quantification noise, high linearity and high duty ratio; and moreover, through adoption of the pulse-width modulation generator, the capacitance-type inertial sensor digital servo circuit generates differential force feedback control signals to realize multi-digit force feedback control so as to greatly reduce the nonlinearity introduced by a common analog-digital converter (DAC) and improve the inhibition capability for common-mode noise.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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