43results about How to "Implementation Latency" patented technology

The invention is appropriate for the communication filed, which provides a fiber optic repeater, a time delay measurement method and a device for the same. The method comprises the steps below: the capped end equipment of each level in local equipment forward N-1 level capped end sends a time delay test instruction respectively; the capped end equipment of each level that receives the time delay test instruction tests this level single transmission time delay of the optic fiber link between itself and next-level capped end equipment; the local end equipment acquires the single line transmission time delay of the optic fiber link between the local end equipment and the N-level capped end equipment, according to the sum of this level single line transmission time delay acquired by each level capped end equipment in the former N-1 level capped end equipment, to compensate base band signal time delay of the former N-1 level capped end with reference on the single line transmission time delay. The embodiment of the invention implements the situation below: when multi-level capped end equipment is concatenated in the fiber optic repeater, the up/down link base band I/O signal time delay of all the capped end equipment is aligned automatically, so that the fiber optic repeater can work coordinately and stably.

The invention provides a method for measuring performance of an Ethernet. The method comprises the following steps: sending a performance measurement request message to a second MEP by a first MEP, wherein the message comprises a first performance measurement parameter; receiving a first performance measurement response message sent by the second MEP, wherein the first performance measurement response message carries a third performance measurement parameter and a fourth performance measurement parameter; receiving a second performance measurement response message sent by a first MIP, wherein the second performance measurement response message carries a first performance measurement parameter, a second performance measurement parameter and a fifth performance measurement parameter; after receiving the first performance measurement response message and the second performance measurement response message, recording a sixth performance measurement parameter; calculating performance parameters between the first MEP and the second MEP and the performance parameters between the first MEP and the MIP according to the performance measurement parameters. By virtue of the method, device and system provided by the embodiment, measurement on packet loss, time delay and jitter performance of each node on a service path can be finished at a time and multiple times of measurement for subregions are not needed.

The present invention discloses a grading control computer system based on the optical packet switch and optical multicast, including at least two groups of CPUs (A), and optical interconnection switching devices linked between the CPUs (A). The optical interconnection switching devices include at least a first level node (1) and a second level node (2). The current HPCS usaully takes use of the centralized control mode: each port has to send the request signals to a central dispatcher after it generates a business, and if the distance is longer, it may introduce a trip delay having a larger request and answer signal. The present invention adopts a grading controlled management style, in which the node is only needed sent requests to the local control unit, thus it can greatly reduce such delay, and at the same time, can reduce the storage and computing pressure of each level control unit.

The invention discloses a network performance measuring method, apparatus and system. The method is used for measuring the network performance parameters of the communication link between a first device and a second device. The first device is configured to be a control client and a session initiating side to implement the TWAMP, and the second device is configured to a server and a session response side to implement the TWAMP. The network performance measuring method is applied to the first device and includes creating the TWAMP type SLA work after a work creation command is received; starting to schedule the TWAMP type SLA work after the starting work scheduling command is received; by scheduling the TWAMP type SLA work to realize the following operation: negotiating with the second device the UDP port number used in the interactive testing of messages; interactively testing the messages with the UDP port determined by the negotiation and the second device; and measuring the network performance parameters according to the interactive testing messages.

According to the edge cloud collaborative deep learning target detection method based on target tracking acceleration provided by the invention, the problem that the real-time performance of the target detection problem cannot be guaranteed is solved. The method comprises the following three stages of processing: in the first stage, a key frame selection method is provided by using a self-adaptive key frame algorithm on an edge node, and key frames are selected in the same deep learning model only by extremely low computing resource cost; and a second stage, at the cloud, high-precision target detection is peformed by using the edge screened data and a high-precision classification model; and a third stage, at an edge end, rapid tracking is carried out through classification of key frames and a frame marking result by utilizing a twin network, and according to the method, data screening aiming at video target detection is realized by utilizing an adaptive key frame algorithm, and meanwhile, compromise between model precision and time delay consumption is realized. A reliable scheme is provided for solving the video target detection problem of the edge cloud collaborative deep learning model.

The method detecting changes of MAC address of AP is used to detect happening of switch. Non-uniform interval detection model is used to make detection. When MN detects happening of switch, it gets new MAC address of AP. With looking up mapping table, MN gets the IP address of AR and subnet prefix in the accessed ESS. The MAC address of MN and the subnet prefix of its neighboring ESS are used to build care-of-address of MN, and makes uniqueness authentication and pre-login to AR in its neighboring ESS. The features of invention includes: detection to mobility of node doesní»t require support of beacon and trigger in link layer, and can be implemented in network layer so that it can be applied in existing WLAN environment directly.

The invention provides a method for testing a multi-mode apparatus. The method comprises the following steps of: loading a plurality of pieces of testing engineering, wherein the plurality of pieces of the testing engineering comprises apparatus testing engineering and equipment testing engineering; setting running identifiers for the apparatus testing engineering and the equipment testing engineering, performing monopolistic control on a data acquisition card by adjusting the running identifiers, and occupying the data acquisition card in different time sharing by the apparatus testing engineering and the equipment testing engineering; detecting a communication type of an apparatus to be tested or equipment to be tested, and initializing the corresponding data acquisition cards respectively according to the communication type; and running the plurality of pieces of testing engineering in a preset command mode by the data acquisition card. In the invention, the monopolistic requirement on the data acquisition card and communication network using is met during testing of the different apparatuses to be tested or in the different testing engineering by setting the running identifiers, and test on a plurality of characteristics, such as an apparatus execution instruction, time delay, a continuous execution instruction and the like is realized at the same time. The invention also discloses a system for testing the multi-mode apparatus.

The invention provides an intelligent operation control system and device. The device comprises a plurality of intelligent operation control systems; each intelligent operation control system comprises an edge intelligent operation control system, a second-stage intelligent operation control system and an n-stage intelligent operation control system; n is an integer greater than or equal to 2; the plurality of edge intelligent operation control systems is connected to one secondary intelligent operation control system; a plurality of second-level intelligent operation control systems is connected to one third-level intelligent operation control system; and so on, connection is carried out; each intelligent operation control system comprises an operation center and at least one intelligent operation control terminal; each operation center is connected with each intelligent operation control terminal; each operation center is at least one server, equipment communication and protocol conversion are executed in a local machine, and microsecond-level time delay and nanosecond-level clock synchronization are achieved; the internet of things of the industrial internet can be quickly constructed, and industrial digital upgrading is enabled.

The invention discloses an LB detection method and system based on MPLS-TP OAM, relates to the technical field of communication, and aims to expand LB detection in MPLSTP OAM, realize time delay and packet loss measurement under LB detection and improve the detection efficiency. And the station-by-station measurement time delay and packet loss measurement of the station-passing node are realized,and the defects that only end-to-end measurement can be realized and the station-by-station measurement of the station-passing node cannot be realized in the existing LM/DM measurement technology areovercome. And meanwhile, a station-by-station detection function of LB similar to Trace is realized, and rapid fault positioning of engineering operation and maintenance is facilitated.

The invention relates to the technical field of communication networks, and particularly discloses a hybrid relay selection method for an intensive communication network, which comprises the followingsteps: taking a group of switching nodes as an information source node and an information sink node, M configurable relay nodes being arranged between the group of switching nodes, and K subcarriersbeing used by the group of switching nodes; and excluding relay nodes at adverse positions by setting parameters of an adjustment timer. The channel state information monitoring burden of the information source node can be reduced, and the burden is distributed to each relay node for bearing in a 'distributed' manner; the dynamic balance among the system stability, the time delay and the signalingburden can be conveniently realized by adjusting the parameters of the timer; and meanwhile, the method is high in expandability, and the method can be easily expanded to super-multi-antenna selection and other complex communication resource allocation scenes.

The invention discloses a transmitter test system and method based on a real-time digital-analog simulation system. The system comprises a tested transmitter, an information feedback device and the real-time digital-analog simulation system, wherein a transmitter test simulation model is established by the real-time digital-analog simulation system according to test parameters required by the tested transmitter, and a current and/or voltage signal is outputted in a small power signal mode to the tested transmitter; in combination with an electrical signal outputted by the tested transmitter and set values of the corresponding tested parameters, whether the electrical signal at an output end of the tested transmitter meets the excessive logic test condition is detected by the information feedback device according to excessive logic test pressure plates, whether the electrical signal at the output end of the tested transmitter meets the under-logic test condition is detected by the information feedback device according to under-logic test pressure plates, and the detection result is fed back to the real-time digital-analog simulation system in the form of a contact signal; whether the test result is correct is determined by the real-time digital-analog simulation system according to the received contact signal. The system is advantaged in that test efficiency of the transmitter can be greatly improved.

The invention relates to a low-delay end-to-end communication method based on a CAN bus. The method comprises the following steps: connecting a plurality of spacer layer devices with a CAN communication gateway through the CAN bus; connecting the CAN communication gateway an external device through a low-delay PHY Ethernet port or a 5G module, wherein the low delay is the connection of microsecond-level time delay; when the spacer layer device communicates with the CAN communication gateway, using a method of priority automatic conversion or intelligent adjustment of the CAN load rate so thatthe communication delay is lower than 5ms. The method is suitable for a standard CAN bus hardware lower-layer protocol, formulates a standard protocol for an application layer, realizes 'low delay' and 'end-to-end' communication characteristics by embedding CPU software and hardware for optimization, and can also solve the problem of 'last kilometer communication' data high-speed communication.

The invention discloses a method and a system for measuring IQ two-path delay inequality and frequency response of a transmitter, and belongs to the field of communication. According to the method, two signals meeting a specific relation are used at a transmitting end, a low-bandwidth photoelectric detector (PD) is used at a receiving end to receive the signals, low-frequency signals containing time delay information are extracted by utilizing the characteristic of low bandwidth, and the frequency response of a transmitter and IQ two-path time delay difference are measured at low cost. Moreover, the receiving end only needs to perform simple correlation and expectation operation on the signal by using the single-tone signal with the known frequency, and does not need to adopt a complex DSP (Digital Signal Processor) equalization algorithm to solve the time delay of the transmitting end, so that the signal processing complexity of the receiving end is reduced.

The invention discloses a time delay measurement method, device and equipment and a readable storage medium. The method comprises the following steps: each node receiving a negotiation message performs timestamp on the message according to a stamping rule contained in the negotiation message; obtaining timestamps stamped for the same message by different nodes; and subtracting the timestamps marked for the same message by different nodes to obtain time delays among the different nodes. According to the invention, the message content does not need to be edited, and the time delay between the nodes is measured on the premise that the link bandwidth is not additionally increased.