44results about How to "Shorten networking time" patented technology

A synchronous soft-start networking control strategy of EMU parallel auxiliary converter is disclosed. When that first auxiliary converter is put into bus bar, the non-first auxiliary converter synchronously completes networking and network connection during the first amplitude soft-start process. The specific scheme is as follows: fast networking logic, busbar fast tracking logic and PQ droop control strategy. The fast networking logic includes the identification of the first and non-first auxiliary converter, the busbar fast tracking logic includes phase, frequency and amplitude tracking, and the PQ droop control strategy includes the introduction of correction factor K. A synchronous soft-start networ control strategy of auxiliary converter of EMU can realize fast and reliable automaticnetwor of auxiliary converter in EMU emergency traction mode. In the normal mode of EMU network, the networking time can be significantly shortened. Therefore, the invention can ensure that the EMU can be started in a prescribed time under various working conditions, and provides a powerful guarantee for the stable and reliable operation of the EMU.

The invention relates to a method for quickly detecting the performance of an HPLC carrier module, and provides a rapid detection platform system. The system includes an analog concentrator, an analog meter tool to be tested, an attenuator, a coupler, a serial port server, a PC upper computer, and an MDS system; Read the module information by using the analog concentrator and the tested HPLC carrier module to dynamically and automatically form a network. It can verify the communication performance of the HPLC module under the condition of 60dB attenuation and the change of the working voltage of the module, and quickly complete the chip ID verification test, module communication performance test, power consumption detection test and power supply adaptability required by the State Grid Specifications test etc. The invention utilizes the analog concentrator as the copy control main equipment to realize the automatic and rapid detection of the performance of the communication module to be tested. Simultaneous detection of multiple HPLC carrier modules to be tested is realized through concurrent meter reading; it is also equipped with an analog meter tool to be tested, which can be quickly bound to the HPLC carrier module to shorten the business process node time and speed up networking efficiency.

The invention provides a neighbor finding method for a directional Ad Hoc network. An antenna active detection / passive monitoring mode of a node is determined based on the binary coding bit of the ID of the node, a channel resource is divided into a plurality of sub-channels through the CDMA or the OFDM technology, the number of the sub-channel which is occupied by the node is determined through an equal-probability random selection method, the purpose that multiple nodes send information alternately on different channels is achieved, the data collision conflict caused by the fact that the multiple nodes send information to the same node at the same time in the neighbor finding process is effectively reduced, the success probability of finding a neighbor node can be remarkably improved, and network networking time is shortened. By the adoption of the neighbor finding method for the directional Ad Hoc network, the neighbor node can be rapidly found in the Ad Hoc network with directional beam transmission being adopted completely, and the neighbor finding method for the directional Ad Hoc network is suitable for all networking scenes with network density being large from small. The neighbor finding method for the directional Ad Hoc network is easy to achieve, the time spent in finding all the neighbor nodes within a one-hop range is short, and reliability is high.

The invention discloses a networking method for a power line carrier module applied to power utilization information acquisition. A master node-dominated networking way is adopted in a networking initialization process; a beacon message is sent by a master node; network access applications are initiated specific to slave nodes which receive the beacon message sent by the master node; and silent modes are kept and channel access is not performed specific to slave nodes which do not receive the beacon message sent by the master node. The networking method for the power line carrier module applied to power utilization information acquisition is provided through redesign of a networking flow, the master node-dominated networking way is adopted, and a time slot allocation mechanism is introduced to allocate a dedicated contention slot and a dedicated non-contention slot to networking, so that the channel access times of the nodes are reduced; an entire networking process is more ordered; and the networking time can be shortened greatly and effectively.

The invention provides an implementation method of a hybrid routing protocol based on a time pulse source, which belongs to the field of communication technology, how to balance network routing overhead and delay overhead, and provide a large-capacity, low-latency, and highly dynamic ad hoc network routing for the system The protocol is the main problem to be solved by the present invention, and the scheme includes: the routing protocol completes the establishment and maintenance of the path tree through the active and periodic broadcast of the pulse message by the pulse node, and completes the path establishment, maintenance and path optimization along the path tree when the non-pulse node has data requirements . Beneficial effects of the present invention: it better solves the problem that active and passive routing protocols use flooding for path discovery and path maintenance, which is not suitable for large-scale nodes, and solves the problem of large end-to-end delay in passive routing protocols problem, this solution is more suitable for situations where the network topology changes rapidly and the scale of network nodes is large.

The invention relates to a networking optimization method for wireless networks for industrial automation. The networking process comprises the following steps: adding a gateway broadcast time slot in the middle of a superframe so as to increase the number of broadcast messages sent by a gateway every unit time; a node to be accessed to an internet receiving the broadcast messages and adding candidate neighbors; selecting synchronization points to carry out time synchronization; utilizing collision detection to perform neighbor finding to find out bidirectional neighbor nodes; the node to be accessed to the internet selecting the bidirectional neighbor node, which ranks in the front, as an agent node from a neighbor table and sending a join request message to the agent node; the agent node forwarding the request message to the gateway; after receiving the join request message, the gateway allocating network resources to the node to be accessed to the internet, with the network resources being distributed to the node in a wireless message manner; and after all resource allocation messages are sent, the networking process is over. The networking optimization method greatly reduces networking time, improves the usage efficiency of join time slot resources, and enables the network resource allocation to be more reasonable.

The invention discloses a master station networking method, a slave station networking method, and a data frame structure for data distribution and wireless transmission, wherein the data transmission of the master station and the slave station after network access follows the data frame structure; the data frame structure includes T combined subframes of slave stations, subframes of the master station, and dynamically assignable subframes; the combined subframes of the slave stations include subframes of the master station and subframes of the slave stations; the subframes of the master station include N distributable frames; The slave station subframe includes M allocatable frames; the master station subframe includes P allocatable frames, and the master station subframe is used for the master station to transmit data; the dynamically assignable subframe includes Q allocatable frames, and the master station subframe includes Q allocatable frames. A station or an authorized slave station transmits data by occupying the dynamically allocable subframe; the allocatable frame includes X time slots. The data frame of the present invention has sub-frames that can be allocated dynamically, which satisfies the requirements of changing data sources of nodes in the system to a certain extent. The network entry of late-entry stations does not affect the network entry status of already-entry stations, and the present invention has a short networking time.

The invention discloses a PLC (power line communication) physical layer clock synchronizing method. The method is characterized in that the transmitting signal of a physical layer comprises a frame header formed by OFDM modulation of known data and a frame body formed by OFDM modulation of control data or upper-layer data required to be transmitted, and a pilot signal formed by OFDM modulation of known data is inserted into the frame body; when a receiving machine processes the receiving signal of the frame header, and preliminary clock frequency and phase deviation are estimated; interpolation is performed on the digital receiving signal according to the estimated sampling clock error so as to allow the sampling clock of the digital receiving signal obtained through interpolation to synchronize with the clock of the digital signal of a transmitting end; when the receiving machine process the receiving signal of the frame body, clock phase deviation is further estimated according to the pilot signal, and the parameters of interpolation is adjusted according to the estimated clock phase deviation. By the method, signals of other nodes can be received, networking time is shortened, network robustness is increased, and network maintenance is simplified.

The invention discloses a networking method of a micro-power wireless communication network. Child nodes in the network are divided into backbone nodes and normal nodes, and networking is performed by employing parallel mode of two networking channel groups; the method includes steps of beacon sending, field intensity collection, and parameter configuration, master nodes and the backbone nodes perform field intensity collection and parameter configuration, and normal node neighbors of the backbone nodes directly perform parameter configuration. According to the method, two networking channel groups are employed in a parallel manner in the networking process, a basic network is established by employing the manner of a backbone network so that the network stability is guaranteed to a large extent, a lot of normal node neighbors do not need field intensity collection and directly perform parameter configuration so that the networking time is greatly saved, and rapid networking is realized.

The invention relates to a multi-network coexistence multi-frequency point wireless communication networking method, which belongs to the field of network planning. The method includes: after the central control node and the site are powered on, when the central control node is in an unnetworked state, adopting a networking method; after the networking is completed, performing network maintenance through proxy changes and real-time routing repair processes; Afterwards, the central control node or site is in the successful state of networking, and the central control node or site network recovery method is adopted. The present invention realizes the networking of multi-network coexistence and multi-frequency points, and shortens the networking time, improves the networking efficiency and network stability and the utilization rate of time slot time, and reduces the network overhead; at the same time, it can quickly restore the network to working status.

The invention discloses an ideal point-based multi-user concurrent access anti-collision method for satellite communication, which divides users applying for access to the network into user groups, constructs a network access ranging model with the user group as a unit, and constructs a multi-objective optimization problem. Then, based on the Pareto evolutionary algorithm, the multi-objective optimization problem is solved, and the solution set is used to form a plan database; the actual network users, time requirements, channel number restrictions and other conditions are determined, and the negotiation curve between the network time and occupied channels is constructed based on the Logistic model and input. Pre-plan library; obtain ideal points that meet actual networking requirements, perform user grouping, arrival rate setting, ranging channel configuration, etc. The networking time in the case of concurrent access has the advantages of strong versatility and easy implementation.

A method for automatic networking of smart home devices, using a self-made automatic configuration tool to automatically read device information through a wired communication connection to a customized product fixture, and cooperate with a cloud server to complete product verification; then, the self-made automatic configuration tool passes a reliable The one-to-one connection method (including serial port and TCP communication) reliably completes the distribution of the wireless Zigbee network of the specified device, and synchronizes the configuration data to the cloud server in real time through the Internet network, and finally completes the assembly of all devices before installation. network. The whole process simplifies and automates the production and installation of smart home products, and optimizes the networking process before leaving the factory; at the same time, it solves the problems of complex installation of various smart devices on the construction site, and time-consuming and laborious equipment configuration and recording.