7 results about "Autonegotiation" patented technology

The invention relates to an energy management system of an energy storage power station, in particular to an automatic negotiation method for a service port of an IEC104 protocol of the energy storage power station. According to the invention, the IEC104 protocol is expanded to support that the IEC104 master station replies that the port is available or conflicts after the IEC104 substation initiates the service port change request, and the IEC104 substation changes the port or finishes the change operation after receiving the reply of the IEC104 master station, so that the purpose of automatic adaptation of the IEC104 master station port after the IEC104 substation port is changed is achieved, and the service port change efficiency is improved. The problem that in the prior art, the modification cost of manual port distribution is large is solved. After the invention is adopted, the change of the IEC104 service port only needs to modify the configuration at the IEC104 substation end, and the IEC104 substation automatically synchronizes the port change to each master station, thereby not only simplifying the configuration steps, but also avoiding the configuration omission of the IEC104 master station.

Method (100) performed by an Ethernet device (500) comprising a transmitter (516, 517) and a receiver (518, 519), comprising the following steps: Sending (102) autonegotiation (AN) base pages via the sender (516, 517) to an Ethernet link peer (552) to offer that the Ethernet device (500) has the capability to support at least one IEEE (“Institute of Electrical and Electronics Engineers”) 802.3 Ethernet specification that supports an AN; Detect (104) at the receiver (518, 519) using a first detection mode, a valid signal sent by the Ethernet link peer (552) that does not support autonegotiation (AN); and Detect (104) at the receiver (518, 519) using a second detection mode, of AN pages sent by the Ethernet link peer (552) using an Ethernet IEEE-802.3 link specification that supports an AN, wherein the first detection mode includes: Detect (108) whether a signal received at the receiver (518, 519) is a valid signal sent by an Ethernet link peer (552) that does not support AN; in response to the detection (108) that the signal received at the receiver (518, 519) is a valid signal sent by an Ethernet link peer (552) that does not support AN, starting (110) an autonegotiation wait timer; and Detect (112) whether both a single_link_ready state and an autoneg_wait_timer_done state are true, and the Ethernet connection, which does not support AN, is a 10 Gigabit-per-second direct link cable (10G-DAC) connection, further comprising: in response to the detection (112) that both the single link_ready state and the autoneg_wait_timer_done state are true, Disable (114) the AN transmission and switch the transmitter (516, 517) to a 10G-DAC mode.

The present invention relates to the technical field of switch aging testing, and discloses an aging testing device and method for a POE switch for security protection. The method includes: fixing the POE switch to be tested on a test platform, applying standard loads to the POE power supply ports respectively through a load simulator and obtaining power supply parameters and port states to obtain initial test data; classifying to generate a hierarchical test benchmark matrix; respectively performing a full-load test on the POE ports, a port isolation data flow test, and an auto-negotiation interaction test, and collecting a full-scale test data set in a hierarchical and progressive manner; performing PSE power supply characteristic calculation, MAC address aging characteristic calculation, and port performance characteristic calculation to generate multiple device state characteristic vectors; calculating the device deterioration trend through an aging prediction model set to obtain a device deterioration prediction index. The present invention realizes the correlation analysis of multi-dimensional performance parameters of the device, and enhances the adaptability and prediction accuracy of the testing method in extreme environments.

The invention relates to the technical field of switch aging test, and discloses a POE switch aging test device and method for security protection, and the method comprises the steps: fixing a to-be-tested POE switch on a test platform, respectively applying a standard load to a POE power supply port through a load simulator, obtaining a power supply parameter and a port state, and obtaining initial test data; performing classification to generate a layered test reference matrix; respectively executing a POE port full load test, a port isolation data flow test and an automatic negotiation interaction test, and collecting a full test data set according to a hierarchical progressive mode; pSE power supply feature calculation, MAC address aging feature calculation and port performance feature calculation are carried out to generate a plurality of device state feature vectors; according to the method, the correlation analysis of the multi-dimensional performance parameters of the equipment is realized, and the adaptive capacity and the prediction accuracy of the test method in an extreme environment are enhanced.

A USB3.1 fiber optic expansion card based on PCI-E can be converted into multiple USB3.1 interfaces through PCI-E technology, and the USB3.1 electrical signals of the multiple USB3.1 interfaces are converted into optical signals for transmission using optical fibers. The USB3.1 fiber optic expansion card is used in conjunction with a USB3.1 fiber optic receiving end, and the optical fiber communication between the two can be automatically negotiated through custom communication rules. The four ports of the USB3.1 HUB main control chip at the USB3.1 fiber optic receiving end can be connected to USB3.0 or USB3.1 terminal peripherals, and the transmission distance can reach 300 meters to 400 meters. The data transmitted by the technical solution adopted by the present invention is in the native USB3.1 data format, and the USB3.1 signal is transparent during the transmission process using the optical fiber transmission equipment, and all ultra-high-speed terminal peripherals that meet the USB3.1 standard can be connected normally.

System for extending an existing twisted copper cable for data transmission, comprising the selection of an additional conductor within the cable as an additional channel, the physical encoding of the data to be transmitted via this additional channel using embedded clock encoding, training and clock recovery using an initial training sequence, the exchange of connectivity data for autonegotiation, and an automatic fallback to the primary Ethernet link in case of missing or faulty autonegotiation.

The invention discloses a multichannel switching Ethernet compatible communication method, a multichannel switching Ethernet compatible communication device, multichannel switching Ethernet compatible communication equipment and a medium. The multichannel switching Ethernet compatible communication method comprises the following steps: receiving a power-on instruction, initializing a control chip, an Ethernet switching component and an Ethernet physical layer chip, and establishing a bus communication link; the control chip obtains equipment state parameters through the established bus communication link and performs communication rate matching to obtain rate matching information; the control chip sends a switching control instruction to the Ethernet switching component and the Ethernet physical layer chip according to the rate matching information so as to switch to a corresponding target communication channel; the control chip performs communication protocol configuration according to the target communication channel; and the Ethernet switching component or the Ethernet physical layer chip performs frame forwarding output on the data information from the control chip according to the configured communication protocol. According to the Ethernet compatible communication method, different vehicle-mounted Ethernet standards are compatible through automatic negotiation switching of multiple transmission rates, and the communication compatibility and stability are greatly improved.