68 results about "Transmission congestion" patented technology

The invention discloses a method for realizing packet scheduling in exchange equipment and the exchange equipment. The method comprises the following steps: inputting a packet message into packet queues in a packet buffer after at least one input scheduler receives the package message; outputting the packet queues to corresponding output buffers according to the sequence from high urgent degree to low urgent degree of the packet queues; and scheduling the packet messages according to the priorities of the received packet message in the packet queues by the output buffers. The method can realize packet exchange scheduling; and the packet has a plurality of optional output ports, and the congestion state of dummy output queues at the output terminal is considered fully, thereby reducing the message transmission congestion, improving the transmission efficiency, lowering the transmission delay, and achieving higher throughput of the exchange equipment.

A method and an apparatus for reducing packet loss for a packet data service during congestion in a transport network are provided. The method comprises measuring a packet loss rate over a time period in one or more flows of data traffic packets associated with the packet data service to determine whether the one or more flows of data traffic packets are experiencing a variation in a desired traffic performance level at a particular time duration during the congestion in the time period. The method further comprises triggering a request to reduce a flow rate of at least one of the one or more flows of data traffic packets based on the packet loss rate if the at least one of the one or more flows of data traffic packets experiences the variation in the desired traffic performance level. By using a distributed transport congestion control, for example, only such Best Effort data traffic packet flows that generate bursty traffic at a specific moment of congestion sense the congestion and thus trigger an associated rate reduction action. However, other flows that do not experience the congestion may not be affected.

A method and a system for mitigating transmission congestion are provided. The computer-implemented method uses distributed computing technology to convert electricity to useful work when determined beneficial to the electricity grid or grid assets. The method also includes an arrangement and prioritization of nodes to perform such work, whether located remotely or within a designated facility.

The invention discloses an Internet of things data transmission method, which comprises the following steps of: acquiring Internet of things data acquired by a sensor; filtering the Internet of things data according to a preset data filtering identifier; and compressing and packaging the filtered Internet of things data, and transmitting the packaged Internet of things data to a server. By the Internet of things data transmission method and Internet of things data transmission equipment provided by the embodiment of the invention, after being acquired, a great amount of Internet of things data acquired by the sensor is filtered to acquire valid Internet of things data satisfying needs, and the valid Internet of things data is compressed and packaged, so data traffic in a data transmission process is effectively reduced, network transmission congestion caused by high data traffic is avoided, and the transmission efficiency is improved.

The embodiment of the invention provides a method, equipment and system for sharing transmission bandwidth among different systems, belonging to the field of communication. When a first communication system and at least another communication system share the transmission bandwidth, the method comprises the following steps that: a first network element in the first communication system compares the sum of rates for sending services to a second network element in the first communication system with bandwidth preset for the second network element; the first network element adjusts the transmission priorities of services sent to the second network element according to the comparison result; and the first network element adjusts the sending bandwidth for transmitting services to the second network element according to the transmission congestion state of the first communication system. Therefore, the method provided by the invention solves the problems that equal distribution of bandwidth can not be ensured when two systems share the transmission bandwidth, and the two systems compete for the shared bandwidth, thus being unfavorable for improving the utilization efficiency of bandwidth.

The invention discloses a wireless network optimization method for an intelligent meter reading system. The method is an improved dynamic routing allocation optimization algorithm. The method mainly solves the routing optimization problem of a wireless network layer, DSR is preliminarily optimized, the unrelated routing number in the DSR is increased, and the enhanced DSR optimization algorithm is provided. In order to solve the route selection problem in the enhanced DSR optimization algorithm, the minimum spanning tree thought is introduced into the DSR, a DSR optimization protocol based on a minimum spanning tree is provided, factors in multiple aspects of bandwidth, transmission congestion, network throughput and the like are comprehensively considered, simulation software NS-2 is used for simulation, and the result shows that the method can effectively shorten delay and improve data transmission efficiency and other indexes.

The invention relates to a video encoding method and device. The method comprises the following steps: detecting current environment brightness, and determining a current brightness level according to the current environment brightness and a plurality of preset brightness levels; acquiring a shooting parameter corresponding to the current brightness level according to a corresponding relation between the preset brightness levels and shooting parameters; performing shooting with the obtained shooting parameter to obtain an initial image; and encoding the initial image to obtain I frames, performing encoding according to the initial image and the I frame to obtain a preset quantity of P frames and/or B frames, and inserting a preset quantity of P frames and/or B frames between two I frames to form transmission code streams. A corresponding adjustment relation is established specific to the shooting parameter and the current brightness level, so that images shot and encoded under different brightness conditions only meet a basic visual definition requirement; the image data size is limited and prevented from increasing along with the increase of brightness; and the problem of transmission congestion caused by increase of image data along with the increase of environment brightness is solved.

The invention discloses an electric car user charging selecting auxiliary decision-making method taking power transmission congestion into account. The electric car user charging selecting auxiliary decision-making method comprises the following steps that an electric car is judged to have the charging demand; road conditional information of traffic routes from the position where the electric caris located to all alternative charging stations is collected and analyzed; the charging time after the electric car reaches all the alternative charging stations is analyzed and calculated; accordingto the congestion situation of a power distribution network, the power sensitivity is calculated through the power flow, and corresponding guiding electricity price is formulated for all the alternative charging stations; and by combining with the road conditional information, the charging time and the guiding electricity price of the alternative charging stations, a charging selecting comprehensive judgment index system is built by applying an analytic hierarchy process, an entropy weight method and a technique for order preference by similarity to ideal solution, and optimal selecting for electric car user charging is completed. Effective technological means are provided for solving the electric car charging selecting problem, distribution of electric car charging loads is optimized while cost is saved for a user, and stable operation of the power distribution network is facilitated.

The invention provides a multichannel transmission control mechanism based on TCP friendliness on the basis of the prior art, and belongs to the technical field of computer networks. The scheme comprises parallel multichannel transmission congestion control oriented to TCP friendliness, a data scheduling strategy of TCP friendliness and a retransmission path selection scheme oriented to energy saving. The multichannel transmission control mechanism based on TCP friendliness can keep the friendliness and the fairness of a TCP while achieving the parallel multichannel transmission performance, load balancing of all paths in the parallel multichannel transmission process is achieved, data transmission performance is improved, and the demand for wisdom multichannel data transmission with environmental protection, energy saving and the like being as the important features of a user is met.

The invention provides a data aggregation algorithm in a wireless sensor network, belonging to the field of wireless sensor networks. The method is suitable for hierarchical networks with a topology structure. The algorithm has the following beneficial effects: through a dynamic time division multiple access (TDMA) mechanism in a cluster, a cluster head data cache mechanism in a cluster head grouping and forwarding mechanism, a cluster head path selection algorithm and a cluster head data forwarding low-latency request to send/clear to send (RTS/CTS) mechanism, the transmission congestion of the network can be relieved, conflicts and collision in transmission can be reduced and the transmission efficiency of the wireless channels is improved; and compared with the traditional data aggregation mechanisms, the low-latency data aggregation mechanism can reduce the data latency from acquisition to transmission to convergent nodes on the basis that the data aggregation efficiency is ensured.

The invention discloses a network transmission congestion control method and device. The method comprises the steps of obtaining a network state parameter, wherein the network state parameter represents network delay; determining a network bandwidth detection mode based on the network state parameter; selecting a congestion control algorithm in the network bandwidth detection mode; and sending a data packet to an opposite side according to a parameter of a congestion window. According to the method and the device, the technical problem that the transmission speed of a wireless network is slowis solved.

The invention relates to a transmission congestion elimination method under the participation of interruptible load. According to the method, user loss is evaluated according to the marginal value, a direct current optimal power flow model for coordinating unit output adjustment and interruptible load scheduling is built, and the congested lines are eliminated gradually through a sensitivity analysis method. The method includes the specific steps that (101) a user power economic value is obtained according to an input-output method and the department electric power demand curve cluster analysis; (102) the economic losses generated when certain load is interrupted by an interruptible load user K are analyzed according to the user power economic value and user electric power demand curve analysis; (103) with the minimum social cost generated by congestion as the target, the direct current optimal power flow model for coordinating the unit output adjustment and the interruptible load scheduling is built; (104) the congested lines are eliminated through the sensitivity method. Compared with the prior art, the transmission congestion elimination method has the advantages of capable of reducing social economic losses generated when the transmission is congested and the like.

The invention provides a method and a system of packet reorder. In inputting the packet of a packet flow to a switching network, a switching network input end inputs the transmission information, such as transmission path of the packet and other packets in the packet flow to the switching network. Thereby, in packet reorder by a packet serial number, a switching network output end can determine the packet with abnormal transmission according to the received transmission path information and perform corresponding packet output treatment as for the packet with abnormal transmission, such as waiting for the packet with transmission congestion in preset time interval and directly outputting the next packet, without waiting for the lost packet. The invention can be applicable to the large capacity packet switching network, avoid unnecessary waiting time resulting from packet loss, realize the packet reorder efficiency and fault tolerance performance improvement of the packet reorder, and improve the packet reorder method of all switching networks including the large capacity packet switch network.

The invention provides a communication port multiplexing method keeping transmission data integrity. The method includes: (1) a receiving end program sends on-demand request instructions to a sending end program in a TCP mode, and receiving objects are created at the same time; (2) the sending end program creates sending objects after analyzing the on-demand request instructions, the sending objects send media stream data to the receiving end program in an RTP data packet format, and the receiving end program distinguishes different media stream data according to multiplexing ID numbers and then sends to the corresponding receiving objects. The sending end performs multipath data transmission at the same physical port, the receiving end receives multipath forwarded data at the same communication port, multipath data is distinguished through multiplexing IDs, the problem that a shortage of communication ports in use in video conference and video command scenes causes data and signaling transmission congestions and media data loss is solved, integrity of media stream data is kept at the same time, and the problem of image frame loss caused by media stream data loss is avoided.

The invention discloses a data transmission method and a data transmission system. The method comprises the following step of: performing data exchange between an access terminal and an access network through a connectionless channel. Through the method and the device, the problems that an abrupt service of which a transmitted data packet is small is packaged in a signaling, and the transmission rate is low, the signaling transmission is influenced, the channel is jammed and the like by transmitting in a signaling mode, or the problem that abrupt data is transmitted in a connection-based data transmission mode, so that frequent disconnection and connection between the access terminal and the access network are required, the terminal consumes more electricity, the processing efficiency of the access network is influenced, null interface resources are wasted and the like in the related technology are solved, so that the jamming of the signaling channel or the aggravation of the jamming is avoided.

The invention discloses a cloud cluster virtual routing system and a realization method thereof. The cloud cluster virtual routing system comprises a cloud cluster virtual routing service subsystem. The cloud cluster virtual routing service subsystem comprises a network management unit, cloud server pools, and forwarding servers, wherein the network management unit is in charge of management of the overall cloud cluster virtual routing system, resource scheduling, session management, terminal management and forwarding network construction management; each cloud server pool is a collection of server resources managed by the network management unit in the cloud cluster virtual routing system; and each forwarding server is used for constructing a routing forwarding network and in charge of virtual routing table construction, terminal registration and data forwarding, and the forwarding server is a server resource selected and deployed independently from the cloud server pool by the network management unit for each network session. According to the cloud cluster virtual routing system and the realization method thereof, internet data transmission congestion can be avoided to the maximal degree, and data transmission delay can be avoided.

The invention discloses a task transmission congestion control method in a DCN (Data Center Network). Sending rates of small tasks and trailing streams in the tasks are accelerated according to data volume sent by current tasks and streams. According to the method, a congestion phenomenon resulting from big tasks in the DCN and a task trailing phenomenon resulting from few slow streams are avoided, the average finishing time of the tasks is effectively reduced, and the integrated performance of a network application is improved.

The invention discloses a current monitoring method for enterprise electric equipment based on a distributed type network. Child nodes in the current monitoring method collect currents of the corresponding electric equipment, so that alternating current signals are obtained, and AC-DC conversion is performed on the alternating current signals to obtain direct current signals. A ZigBee wireless transmission technology is adopted for transmitting the direct current signals to a parent node, after the parent node performs buffering and screening on the direct current signals, and the direct current signals are uploaded to a parent server by the adoption of a wire transmission technology and used for monitoring the currents of the electric equipment. In the current monitoring method, due to the facts that the parent node performs the data buffering and screening on the current signals, collected by the child nodes, of the electric equipment, and the wire transmission technology is adopted for transmitting the current signals to the parent node, the probability of data transmission failure caused by transmission congestion is reduced, through the data screening, the incorrect current signals are removed, so that the data transmission quantity is effectively reduced, and the rate and the reliability of the data transmission are effectively improved.

The invention provides a coordinated operation method of data transmission congestion of multiple photovoltaic power stations, and relates to the field of power grid dispatching. The coordinated operation method of data transmission congestion of multiple photovoltaic power stations comprises the steps of analyzing and calculating parameters which affect data priority classification and then describing the initial dynamic priority of the data of each photovoltaic power station by using a function; building an optimal distribution function by combining with environment parameters of each photovoltaic power station which affect the data transmission and a power generation power coefficient and setting a suitable priority threshold value; comparing the optimal distribution function value of the data transmission with the priority threshold set value to finish the priority classification; and finally realizing priority distribution of the overall data of each photovoltaic power station. According to the coordinated operation method of data transmission congestion of multiple photovoltaic power stations, the data with high priority are processed preferentially, the data congestion problem is solved and the utilization efficiency and the processing speed of the information data of each photovoltaic power station are improved.

The invention discloses an adaptive vertical routing method based on a network on chip and a routing unit. The routing method comprises steps of determining the direction of the next transmission node based on the relationship between the current node coordinate position and the destination node coordinate position of the transmitted data each time when the data are transmitted from the source node to the destination node, so that when the source node is at the upper position of the destination node, transmission is firstly performed in the vertical direction and then in the horizontal direction, when the source node is in the lower position of the destination node, transmission is firstly performed in the horizontal direction and then in the vertical direction, and when the source node and the destination node are in the same layer, transmission is directly performed in the horizontal direction. The routing unit comprises an input/output interface unit, an input/output selection unit and a direction calculation unit. The adaptive vertical routing based on the network on chip is achieved, the implementation method is simple, the transmission time is less, the transmission congestion is avoided, and the temperature control and the flexible transmission are realized at the same time.

The invention discloses a dynamic node identity implementing method and a dynamic node identity implementing system for a wireless measurement and control network based on ZigBee. The method comprises the following steps of: (1) customizing serial port commands of an upper computer, wherein the serial port commands comprise C/EX**** and C/CH****; (2) storing information of other nodes in a structure form by each node in an application layer of a protocol stack; (3) if a router node receives a node identity changing command, stopping a routing forwarding function and starting acquiring data; if a terminal mode receives the node identity changing command, stopping acquiring the data and starting the routing forwarding function; and (4) respectively storing the received data information according to different source addresses through router nodes specified by the serial port commands, and when the data information from the same source address reaches for 10 times, sending the 10 pieces of data information to a coordinator at one time. By the method and the system, the reliability of the network is improved, the transmission congestion phenomenon of the network is relieved, transmission delay of the data is reduced, and energy of the nodes is saved.