103results about How to "Reduce the probability of congestion" patented technology

The invention discloses a spatial information network isomerism dynamic networking method based on a layered autonomous area. The method includes the following steps that according to components and functions of all parts in the whole spatial information network, a spatial information network system structure is set up; according to the properties, the functions, the zone positions and the requirements, all nodes in the network are divided into different layered autonomous areas with independent networking routing strategies; boundary nodes are selected to separate a control link from a service link and the inter-domain control information transmission and the intra-domain control information transmission are separated; an intra-domain sub-layer which is in line with international standards and an inter-domain sub-layer which has the same protocol and functions on all the nodes are set up to form a layered autonomous area model network protocol stack frame. According to the spatial information network isomerism dynamic networking method based on the layered autonomous area, coupling is little, the network nodes are plugged when needed, and the network managing control efficiency is high.

The invention discloses an electric power motor train unit grouping method more flexible and belongs to the field of motor train unit grouping methods of electric power motor train unit vehicles based on electric power electronic transformers. According to the electric power motor train unit grouping method, carriages, except a train head and a train tail, of a motor train unit are provided with novel electric power electronic transformers which have the functions of transformers and also the functions of traction convertors and serve as novel power supply devices so that a traction drive system of the whole train can be more efficient, capable of better saving energy and lighter, the pantograph layout and the grouping method of basic motor train units are improved based on the fact, and the electric power motor train unit grouping method is more flexible. In addition, the industrial Ethernet serves as a new communication bus between all novel motor train carriages and a drive control system to replace a traditional rail vehicle MVB communication bus, the data transmission efficiency is improved, the congestion probability is reduced, the overall system reliability of coupling or decoupling of the motor train is improved, and safety of the train during running is improved.

The invention belongs to the technical field of mobile communication, and discloses a switching method based on IEEE80211p in a VANET. The method comprises the steps of firstly, only considering the RSSI of an RSU to decide whether switching is carried out or not, and dividing the switching into hard switching and soft switching; then in the soft switching, conducting analysis through a Stackelberg game to decide whether a vehicle is switched or not; finally, after a first application of the vehicle for switching fails, conducting a repeated application for switching through a BEB, and completing the switching by applying a game method again. According the method, the switching situation of the vehicle in the overlapping region of the RSU under the real environment can be simulated, the vehicle can select the right time slice to conduct the switching, the probability of congestion of the switching is reduced, the delivery rate of the network is improved, the vehicle can obtain better handling capacity, the whole performance of a VANET subnet is improved, and the user experience degree is improved.

The invention discloses a wavelength switched optical network routing method based on universal multi-protocol label switch. A local matrix is introduced to each network node position, comprises power flatness information of all existing optical paths in routing and is stored and dynamically updated through RSVP-TE and OSPF-TE protocols. The matrix is utilized to obtain a path with minimum power flatness, so that the influence on a whole network of the power flatness of a single wavelength division multiplexing link during sudden failure is minimized. The problem caused by the power flatness is reduced, the power flatness possibly influences a survival optical path when the wavelength division multiplexing link fails in a GMPLS based wavelength switched optical network, and the M*M storage matrix exists in each network node and is dynamically updated through the RSVP-TE and OSPF-TE protocols. A simulation result shows that by means of a POSR scheme, the average key link number in the network is effectively decreased, and especially key links are decreased while POSR-0 congestion rate is not improved.

The invention relates to a highway intelligent aided guidance system based on a GPRS (General Packet Radio Service)/CDMA (Code Division Multiple Access) wireless network and a control method thereof. The highway intelligent aided guidance system based on the GPRS/CDMA wireless network is characterized by comprising a wireless network composed of a traffic information board node, a variable speed-limiting signboard node, a visibility detection node and a background monitoring center, wherein the background monitoring center is connected with the GPRS/CDMA wireless network, initializes settings of the traffic information board node, the variable speed-limiting signboard node and the visibility detection node and monitors the working state of the nodes; meanwhile the background monitoring center formulates an overall guidance scheme according to road condition parameters sent by the visibility detection node and guidance content fed back by the traffic information board node and the variable speed-limiting signboard node, and sends guidance adjusting commands to the corresponding traffic information board node and variable speed-limiting signboard node through the GPRS/CDMA wireless network; and the background monitoring center informs a highway department to take emergency measures such as road closure and the like under a particularly severe road condition.

The invention discloses a message receiving method and a device, and belongs to the field of network communication. The method comprises steps: a repeated confirmation message sent by a transmission control protocol (TCP) receiver is received, wherein the repeated confirmation message is triggered by a first data message; whether a second data message disorderly reaches the TCP receiver is detected; and if the detection result is that the second data message disorderly reaches the TCP receiver, an operation in response to the repeated confirmation message can be prevented from being executed or an operation of forwarding the repeated confirmation message to a TCP sender can be prevented from being executed. As the second data message is detected to disorderly reaches the TCP receiver, the operation in response to the repeated confirmation message can be prevented from being executed or the operation of forwarding the repeated confirmation message to a TCP sender can be prevented from being executed, the problem of repeated data message transmission due to disorder can be solved, and the purpose of greatly improving the effective network capacity can be achieved.

The invention relates to an optical cross connection device for core nodes of an optical burst switching network, which comprises a service source module, wherein the service source module is connected with a control module through a BCP channel and is connected with an optical cross connection module through an optical emission module; the optical cross connection module is controlled by the control module; a first demultiplexer and a first multiplexer are arranged in the optical cross connection module, and the first demultiplexer is connected with the first multiplexer through a channel unit; the channel unit comprises transmission channels which are in one-to-one correspondence with the wavelengths of BDP data; the control module comprises an identification unit and an analysis unit; a wavelength conversion unit is arranged in the optical cross connection module, one output end of the channel unit is connected with the input end of the wavelength conversion unit, and the output end of the wavelength conversion unit is connected with one output end of the channel unit; and the analysis unit is respectively connected with the channel unit and the wavelength conversion unit. The invention has the advantages of strong anti-congestion ability, simple structure and low cost.

The invention discloses an LEO satellite network reliability routing method based on QoS guarantee, and the method comprises the following steps: guiding flow of a hot spot area to transfer to a non-hot spot area, designing strict QoS constraints while selecting a route to complete search of an inter-satellite routing path so as to ensure that the found path has the optimal service quality; and the congestion probability of the satellites passing through the light-weight load task as much as possible is reduced, so that the packet loss rate is reduced, and the reliability of a routing forwarding path is improved.

An embodiment of the invention discloses a method, equipment and a system for allocating balanced access resources, which belong to the field of time division synchronous code division multiple access systems. The method comprises the following steps that: network-side receives a message which carries the frequency-band capacity of user equipment and is sent by the user equipment; the network-side equipment allocates radio resources to the user equipment according to the message; and the network-side equipment informs the user equipment of radio resource allocation information. The network-side equipment comprises a receiving module, an allocating module and an informing module. The user equipment comprises a sending module, the receiving module, a configuration module and the informing module. The technical scheme of the embodiment of the invention can solve the problem of radio resource unbalancing, thereby being favourable for balancing the allocation of the resources in each frequency band reasonably, reducing the probability of interference and resource congestion and improving network connection rate and user quality experience.

The invention provides a data processing method, device and system, and relates to the field of distributed computing. The method comprises: a controller receiving a processing request which is sent by a designated node and carries identifiers of a plurality of computing nodes used for executing a designated computing task, and then a target switching device can be determined from switching devices used for being connected with the plurality of computing nodes; respectively sending routing information used for indicating a data forwarding path between the plurality of computing nodes and the target switching equipment to the target switching equipment and the specified node; wherein the target switching device is used for carrying out merging processing on the data reported by the plurality of computing nodes according to the routing information and then sending the data to each computing node, the specified node is used for sending the routing information to each computing node, and each computing node can report the data to the target switching device according to the routing information. According to the method provided by the invention, the probability of network congestion canbe reduced, and the calculation task execution efficiency is improved.

The invention relates to a wireless communication method and system of an intelligent parking lot. The method comprises the following steps that: a variable quantity of each sampling value of one parking space relatively to an initial sampling value is compared with a preset variable threshold value; if the variable quantity is larger than the variable threshold value, the sampling value is reported by using a small cycle; and if the variable quantity is less than the variable threshold value, the sampling value is reported by using a large cycle. The reported sampling value is counted to obtain a second counting value; when the second counting value is larger than a response interval, a wireless router is required to take responses while the sampling value is reported. According to the invention, sampling values are reported by using different report intervals, thereby avoiding reporting of lots of sampling values, reducing the data bulk in a wireless channel, and reducing the channel congestion probability. Furthermore, when the number of the reported sampling values reaches a certain value, the wireless router is required to take responses, thereby reducing the channel congestion probability. Moreover, a wireless parking space detection node is mainly responsible for sensing data acquisition, thereby improving the work efficiency of the wireless parking space detection node.

The invention discloses a pre-allocation-based flow control method, which comprises the steps of: carrying out initialization, acquiring the available average band width for best-effort service of each link; setting the initial injection rate of best-effort service of each link to be the average service volume of the link; allocating the shortest path for best-effort service of all links; setting the target injection rate of best-effort service to lead the load factors of all links to be lower than 1; and according to the target injection rate, flow control is carried out by designing network interfaces and changing storage and transmission methods of data in an IP nucleus send buffer. The invention also discloses a pre-allocation-based flow control device. Taking advantage of the service predictability of network-on-chips, the invention reduces the service suddenness, lowers the congestion possibility and improves the network-on-chip performance by restricting the injection rate of best-effort service of all links within the average available band width of best-effort service of each link.

The invention relates to a block chain multi-chain concurrent transaction system. The block chain multi-chain concurrent transaction system effectively reduces the waiting time of transactions in a transaction flow through a mode of dividing a block chain system into a main chain and multiple sub-chains and distributing the transactions to different chains for packaging, thereby improving the utilization rate of resources, and improving the utilization rate of a multi-core CPU. The multi-chain concurrent transaction mode realizes a function of signing multiple chains simultaneously by a singleprivate key according to a method of adding some fields to an address of the main chain by a user to generate an address of the sub-address; cross-chain transactions between the main chain and the sub-chains and between the sub-chains are realized through a mode of setting a hub chain in the block chain system; the transactions are intelligently distributed to the sub-chains through an intelligent selection currency transferring address module, and the congestion rate of the block chain is reduced; the number of the sub-chains of the block chain system is intelligently increased or decreasedthrough an intelligent sub-chain increasing or decreasing module, and the operation performance of the block chain system is improved; and the balance of each sub-chain account is collected to a mainchain account at intervals through an intelligent balance collection module.

The invention discloses a laser cladding powder feeder. The laser cladding powder feeder comprises a powder cylinder, a base portion, a cover plate, a rotating disc, a powder suction pipe and a rotating disc motor. Relatively accurate powder feeding operation can be achieved by a relatively simplified structure on the basis of the laser cladding powder feeder.

The invention relates to the technical field of data bus communication, and particularly relates to a bus system and a data transmission method based on a combination of polling and uniform time slots. The bus system includes a bus, bus adapters and electronic equipment, wherein the bus performs two-way communication with multiple bus adapters, and each of the bus adapters performs two-way or one-way communication with multiple sets of electronic equipment; and the communication between the bus and the bus adapters adopts the combination of polling and uniform time slots. According to the scheme of the invention, a combination of polling and competitive time slots is adopted, burst services can be processed in time through the uniform distribution of the competitive time slots, the mean waiting time can be reduced, the real-time response characteristics of the system can be improved, and meanwhile, by setting the polling time slots, congestion data caused by competitive collisions canbe effectively eliminated, the network congestion rate can be reduced, the system throughput can be guaranteed, and the polling and competitive time slots can be customized.

The invention relates to the technical field of ports, in particular to an along-shore type full-automatic container wharf loading and unloading system. The along-shore type full-automatic container wharf loading and unloading system comprises (1) wharf operation berths, (2) wharf front operation areas, (3) a container automatic storage yard area and (4) facilities behind storage yards, wherein the wharf operation berths are arranged in a full hall manner, and the multiple berths are arranged on a wharf shoreline in a linear manner; the wharf front operation areas are defined between the container operation berths and the container automatic storage yards; the container automatic storage yard area is arranged in parallel and adjacent to the wharf front operation areas and composed of the multiple storage yards arranged in parallel to the wharf shoreline and a plurality of automatic rail cranes arranged in parallel to the direction of the storage yards; and the auxiliary facilities such as wharf entrance and exit gates, a yard parking lot and an auxiliary building area are arranged behind the container automatic storage yards. The method is beneficial to improving the harbor traffic organization and production operation efficiency and improving the intelligent level of a harbor loading and unloading system.

The invention proposes a message propagation method and system, and the method comprises the steps that a source node generates a message, and broadcasts the message based on a preset wireless network protocol, wherein the message comprises the navigation direction information and position information of the source node; the source node judges whether first response information returned by a first node is received or not; the first node returning the first response information is determined as a first jump relay node if the source node receives the first response information, so as to enable the first relay node to continue to broadcast the message. The method can reduce the message propagation quantity, and reduce the probability of channel congestion and information conflict.

The invention discloses a multi-ring-based optical network-on-chip topology structure design method, and is used for solving the problems of severe network congestion, low extensibility and complex network of the existing optical network-on-chip topology structure. The implementation steps are that a ring set collection G is set; the ring set collection G is initialized; whether each ring set gq in the initialized ring set collection G0 has no ring crossing is judged; the network congestion factors of all the ring sets in a target ring set collection Gn are calculated; the previous 2N ring sets of all the ring sets are selected according to ordering of the network congestion factors; the previous 2N ring sets are optimized and updated so that the target ring set collection Gn is obtained; and the updating number n is judged, and the ring set gmin of the lowest congestion probability factor is selected. The method of selecting the multi-ring topology of the lowest network congestion probability factor and the single wavelength communication method are adopted so that the congestion situation of the optical network-on-chip can be alleviated, the extensibility of the optical network-on-chip can be enhanced and the network complexity and cost can be reduced.

The invention discloses an electric vehicle charging guiding and pricing method based on a dynamic road-electricity coupling network. The method comprises the steps of building an interaction framework of traffic flow energy flow information flow of an electric vehicle in the dynamic road-electricity coupling network; dynamically updating the traffic network information, and establishing a singleelectric vehicle model for simulating a continuous driving charging state switching behavior of the electric vehicle; carrying out dynamic navigation and dynamic station selection on the electric vehicle according to the dynamic information of the coupling network; performing virtual load prediction according to the in-station virtual load and the out-station decision load; and pricing the electric vehicle charging in real time according to the load balance distribution and the predicted virtual load. According to the electric vehicle charging guidance and pricing strategy based on the dynamicroad-electricity coupling network, the distribution of the charging load in the space dimension is balanced, the congestion rate inside the charging station is reduced, the average income of electrictaxi drivers is increased, and meanwhile, the congestion phenomenon of a traffic network is relieved to a certain extent.

The invention provides a control method and device for connecting an eMTC terminal to a base station. The method comprises the steps of: when the base station of an eMTC system is prepared to be accessed randomly, randomly generating the first connection time; and, after the first connection time is delayed, sending a random access request to the base station of the eMTC system. By means of the method, the signalling storm due to the fact that a large number of eMTC terminals simultaneously initiate random access requests can be avoided; therefore, the eMTC network congestion probability is reduced; the success rate of randomly accessing the eMTC terminal to the base station is effectively increased; and the control method and device provided by the invention have relatively low complexity, and have better optimization and improvement effects on congestion control of the eMTC system.