58results about How to "Reduce sending rate" patented technology

A technique for implementing an admission control scheme for data flows is disclosed. In one embodiment, the technique is realized by determining a current error value in response to a queue size in a packet buffer; generating a packet drop probability based at least in part on the current error value; receiving a data packet having a data type; and determining whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold. In addition, the technique may involve determining whether a randomly generated number is less than or equal to the packet drop probability and determining whether a count variable is greater than or equal to an inter-drop interval.

According to the teachings presented herein, a base station implements active queue management (AQM) for uplink transmissions from user equipment (UE), such as a mobile terminal. The base station, e.g., an eNodeB in a Long Term Evolution (LTE) network, uses buffer status reports, for example, to estimate packet delays for packets in the UE's uplink transmit buffer. In one embodiment, a (base station) method of AQM for the uplink includes estimating at least one of a transmit buffer size and a transmit buffer queuing delay for a UE, and selectively dropping or congestion-marking packets received at the base station from the UE. The selective dropping or marking is based on the estimated transmit buffer size and / or the estimated transmit buffer queuing delay.

The invention discloses congestion control methods, devices and a system, and belongs to the technical field of communication. The method includes the following steps: exchange equipment or a receiving terminal server can obtain a congestion message and congestion information of the exchange equipment when network congestion occurs in the exchange equipment; a congestion notification message can be sent to a sending terminal server, the congestion notification message carries the congestion information, and the congestion information is used for instructing the congestion level of a caching queue used for forwarding the congestion message in the exchange equipment; and the sending rate of the data flow to which a caching message belongs can be reduced according to different deceleration rates in accordance with the congestion level of the caching queue after the sending terminal server receives the congestion notification message. The method enriches the contents of the congestion notification message and enhances the precision of congestion control; network bandwidth utilization rates can be maximumly enhanced on the basis of alleviation of network congestion.

A method, apparatus, and computer program product for modeling dynamics of a queue are disclosed. A queue law function can be used to determine a control function for use in a congestion control module in a network for dropping packets. A queue law function may be determined based upon traffic conditions in the network. First a quantity that is representative of the link utilization between first and second nodes is determined. If the link is fully utilized, a quantity that is representative of an average round transmission trip time for data to be sent from the first node to the second node and an acknowledgment to be received by the first node is calculated. The queue law function which is dependent on a data drop probability based upon the link utilization, the buffer size, and the average round trip transmission time is determined. From this queue law function, parameters for defining a control function can be derived. These parameters include the minimum buffer size and the maximum expected queue size during normal operation for the node.

A method of controlling a data unit sender is described. A flow control procedure for controlling the flow of data units sent by said data unit sender is conducted in dependence on acknowledgement messages from the receiver The flow control procedure utilizes (S103) at least one output limiting parameter (olp; cwnd) for placing a limit on the data units sender's current data send rate. A procedure is provided for detecting (S110) a data unit loss indication, in response to the detection of a data unit loss indication, performing (S311) a retransmission, subsequent to said retransmission (S311) waiting (S312) for an acceptable acknowledgment message carrying the sequence position identifier indicative of said data unit indicated as potentially having been lost, and distinguishing (S317) whether said acceptable acknowledgment message relates to an original transmission, and in response to distinguishing that said acceptable acknowledgment message does not relate to said original transmission, performing (S318) a congestion response step, while in response to distinguishing that said acceptable acknowledgment message relates to said original transmission, said output limiting parameter is adapted (S319) based on one or more duplicate acknowledgment messages received since receiving the last acceptable acknowledgment message that precedes the acceptable acknowledgment message carrying the sequence position identifier indicative of said data unit indicated as potentially having been lost.

The invention relates to a method and system for reducing traffic flow from a sending network element to a mobile element during handoff situations when the connection of the mobile element is switched, or to be switched, over from a first network access element to a second network access element. When the mobile element detects, or is informed on, a handoff process to be initiated, a procedure is initialised for reducing the traffic flow from the sending network element to the mobile element. The procedure for reducing the traffic flow preferably comprises employing an optimization process, preferably a TCP optimization process, e.g. delaying the sending of an acknowledgement message from the mobile element to the sending network element, or to reduce the value of the field "advertised window" of the acknowlegdement message to a smaller value than the actually appropriate value.

The invention provides a network flow control system which comprises a detecting unit, a judging unit, a determining unit and a first processing unit, wherein the detecting unit is used for detecting and counting point-to-point flows; the judging unit is used for judging whether an operation of discarding a data packet is taken when detecting that the flows exceed a threshold; the determining unit is used for receiving a judging result of the judging unit and determining a protocol type of the discarded data packet when judging that the operation of discharging the data packet is taken; and the first processing unit is used for taking the operation of discarding the data packet when judging that the protocol type of the data packet is a transition control protocol, and controlling a receiving end to send a message indicating buffer region congestion to a sending end. Correspondingly, the invention also provides a network flow control method. According to the technical scheme provided by the invention, when the flows exceed the threshold, while the operation of discarding the data packet is taken, the message indicating the buffer region congestion is sent to the sending end, so that the sending end knows that the receiving end is congested, and can be used for actively reducing the message sending rate, and ensuring that the inlet bandwidth is reduced while the outlet bandwidth is reduced.

Conferencing data is reliably delivered to computer systems participating in a hierarchically arranged multi-cast conferencing session. When a child computer system does not receive a multi-cast packet (e.g., an IP multi-cast packet), the child computer system sends a negative acknowledgment to a parent computer system. In response, the parent computer system re-transmits conferencing data that was contained in the multi-cast packet to the child computer system. Conferencing data can be re-transmitted to the child computer system via uni-cast (e.g., TCP). Accordingly, conferencing data that is not received or that is damaged via multi-cast can be repaired via uni-cast. Computer systems can join an existing multi-cast conference session without having to communicate with the root computer system. The root computer system adjusts a multi-cast send rate to compensate for changed network conditions.

The invention provides a method for controlling the flow of an exchanger, comprising the following steps of: acquiring an MAC (Multi-Access Computer) address corresponding to an output port by utilizing the exchanger when the blockage of the output port is detected; sending an expanded PAUSE frame with the MAC address to a sender of the flow causing the blockage of the port by using an input port so as to reduce the speed of sending the target MAC address to the sender of the flow causing the blockage of the port and reduce the flow transmitting speed of the blocked port without influencing the flow transmitting speeds of other ports of the exchanger.

The invention provides a method for achieving explicit congestion notification, which is applied to a provider edge (PE) device which receives message containing an internet protocol (IP) head and transmitted by a user edge device, and the IP head contains marks supporting explicit congestion notification (ECN). When the device is confirmed to be in a congestion state, the received message is packaged to be multiple protocol label switching (MPLS) message, and an ECN label with a network congestion mark is arranged at the bottom of a label stack of the MPLS message. The invention further provides a method for achieving explicit congestion notification, which is applied to a provider (P) device which receives the MPLS message transmitted by the PE device, and when the device is in a congestion state and the ECN label at the bottom of the label stack of the MPLS message is provided with a network non-congestion label, the ECN label at the bottom of the label stack of the received MPLS message is set to be a network congestion mark and is conducted with public network label exchange processing. The invention further provides the PE device and the P device. The method and the devices can effectively relieve network device congestion in the MPLS network.

A method and an apparatus for transmitting data are provided. The method and the apparatus for transmitting data obtain reception information of a packet received by a reception apparatus on a virtual machine installed on an operating system of the data transmission apparatus, calculate a next sending rate based on the reception information, and transmit a packet according to the next sending rate.

The invention provides a vehicle control method and device. The method comprises the steps of: determining vehicles on a lane on which passing is going to be allowed; sending a preset first passable vehicle parameter to the vehicles; determining the first passable vehicle parameter when the vehicles are waiting for passing; according to the first passable vehicle parameter, judging whether the vehicle itself can pass the crossing in the passing period; and according to the judging result, determining a driving speed after passing is allowed. By adopting the scheme provided by the invention, the vehicle is enabled to judge whether the vehicle itself can pass the crossing in the passing period according to the first passable vehicle parameter, and the driving speed after passing is allowed is determined according to the judging result, so that fuel waste and traffic accidents caused by that the vehicles fail to know whether the vehicles themselves can pass the cross in the prior art are avoided; and each vehicle determines the driving speed before the passing is allowed, so that the passing efficiency is improved to a certain degree.

The invention provides a transmitting speed adjusting method in a wireless local area network and a device using the same. According to the method, a conflict factor related to cochannel active equipment is introduced into a current rate adaption method, so that the influence of multiple pieces of wireless communication equipment in the same wireless channel can be considered, the performance of the wireless local area network when the wireless local area network has a plurality of users is improved, and better user experience is brought to the users.

The invention provides a method for achieving an explicit congestion notification. The method is applied to provider edge: provider edge (PE: PE) device for receiving original message which contains an internet protocol (IP) header and is forwarded by a customer edge (CE), the IP header contains an identification which supports the explicit congestion notification (ECN); and if a congestion state at present is determined by the PE device, the received original message is encapsulated to be generic routing encapsulation (GRE) message, and a network congestion identification is set on an outer layer IP message header of the GRE message. The invention further provides further a method for achieving an explicit congestion notification, which is applied to provider: provider (P: P) device which receives the GRE message forwarded by a PE; and if the congestion state at present is determined by the P device and the network congestion identification is not set on the outer layer IP message header of the GRE message, the network congestion identification is set on the outer layer IP message header of a received GRE message. PE and P devices for achieving the explicit congestion notification are further provided. By means of the methods and the devices for achieving the explicit congestion notification, network device congestion is effectively relieved in GRE tunnel network.

The invention discloses a feedback type UART adaptive Baud rate system and an adaptive Baud rate method, and relates to a UART adaptive Baud rate system and a Baud rate method. The invention aims to solve the problems that the Baud rate change initiated by a slave is generally ignored in the conventional adaptive matching mode, and actually, the Baud rate of a bus also needs to be adjusted due tothe limitation of subsequent storage space by the slave. The system comprises a host sending module, a host receiving module, a slave sending module and a slave receiving module, wherein the host andthe slave share one UART bus; the host sending module is used for sending to-be-sent information to the receiving modules of the slaves; the host receiving module is used for receiving feedback information of the slave; the slave sending module is used for sending the Baud rate information applied by the slave to the receiving module of the host; and the slave receiving module is used for receiving the data information transmitted by the host sending module. The method is applied to the field of UART communication.

The invention provides a network congestion notifying method, a proxy node, and a computer device, and belongs to the field of data communication. When receiving a first data packet, the proxy node adds a source queue pair number to the first data packet to obtain the second data packet, and sends a second data packet to a receiving end through a network node. During the forwarding of the second data packet, the network node generates a first congestion notification message carrying the source queue pair number if the network congestion is detected, and sends the first congestion notificationmessage to the proxy node, and then the proxy node sends the congestion notification message to a sending end, so that the sending end reduces the sending rate of the data stream to which the first data packet belongs. Because the network node in the present invention detects the congestion of the network, the network node immediately sends the first congestion notification message to the sendingend, so that the sending end can reduce the sending rate of the data stream to which the first data packet belongs in time, thereby avoiding the loss of a follow-up messages of the data stream.

The invention relates to a field of wireless network communications, and is used for solving a congestion problem in the wireless network communication. A technical scheme adopted by the invention is that a congestion control method based on a GARCH time sequence algorithm comprises the following steps: establishing a GARCH (p, q) autoregression condition heteroscedasticity prediction model by taking the generalized autoregression condition heteroscedasticity GARCH algorithm as the basis and taking the time interval that a sending end accepts the arrival of a correct command as a time sequence, wherein p is the order of the autoregression, and the q is the order of an ARCH item, predicting the delay time for sending a data packet by the sending end so as to obtain a prediction value; comparing the size of the data packet with the prediction value; if the actual bandwidth is greater than this value, regarding that the transmission is free from the congestion phenomenon; otherwise, regarding that the network is in the congestion phenomenon, and the size of a data sending window with the congested sending end needs to be correspondingly adjusted. The method disclosed by the invention is mainly applied to the wireless network communication.

Embodiments of the invention disclose a data sending method. The method comprises the following steps of through calculating network time delay of a preset time segment, analyzing time-delay changes of a current network; according to the time-delay changes of the current network, analyzing a network congestion state trend; according to the network congestion state trend, determining whether the current network is in a congestion state; when the current network is in the congestion state, reducing a sending rate of current sending data. The invention also discloses a correlation device. By using the method and the device, the sending rate can be adjusted in advance, and a technical problem that video transmission quality is severely influenced because congestion network recovery time is long in a low bandwidth network in the prior art is solved. In addition, through creating a sending window used for limiting an instantaneous sending rate, a network deterioration degree during a detection process can be further controlled; jamming and pause frequencies of video playing are greatly reduced and real-time and fluent performance of the video playing are guaranteed.

The embodiment of the invention discloses a method, device and system for controlling network congestion, and belongs to the technical field of big data. The method comprises the steps that a transferdevice receives a target token request sent by a data sending end and sends the target token request to a data receiving end, and the data receiving end can determine a target token packet corresponding to the target token request according to the target token request and then send the target token packet to the transfer device according to a priority identifier. After the transfer device receives the target token packet, the transfer device can determine the sending rate of the token packet according to the link bandwidth of the transfer device, the preset packet length of the token packet and the preset packet length of the data packet, and then send the target token packet to the data sending end according to the priority identifier and the sending rate of the token packet. After receiving the target data packet sent by the data sending end, the transfer equipment can send the target data packet to the data receiving end. According to the invention, the packet loss rate can be reduced.

The invention relates to streaming media transmission technique and provides a congestion control processing method based on a RTP protocol. The congestion control processing method comprises the following steps: linearly increasing the transmission rate of TCP stream, and linearly increasing the transmission rate of streaming media; when the increase amplitude of the transmission rate of the streaming media is greater than the increase amplitude of the transmission rate of the TCP stream, multiplicatively decreasing the transmission rate of the streaming media; under the conditions that the packet loss rate increases but the network is not in the congestion state, multiplicatively decreasing the transmission rate of the streaming media; and monitoring whether the network is in the congestion state or not, if the network is in the congestion state, multiplicatively decreasing the transmission rate of the TCP stream, and if the network is not in the congestion state, returning to the step one. The invention can carry out stream control on the multimedia stream when the packet loss rate increases but the congestion is not formed to avoid congestion with lower cost, and simultaneously decreases the transmission rate of the TCP stream and the transmission rate of the multimedia stream under the condition that the congestion occurs, thereby shortening the time of the network for releasing the congestion and ensuring the fluency of streaming media transmission.

According to the teachings presented herein, a base station implements active queue management (AQM) for uplink transmissions from user equipment (UE), such as a mobile terminal. The base station, e.g., an eNodeB in a Long Term Evolution (LTE) network, uses buffer status reports, for example, to estimate packet delays for packets in the UE's uplink transmit buffer. In one embodiment, a (base station) method of AQM for the uplink includes estimating at least one of a transmit buffer size and a transmit buffer queuing delay for a UE, and selectively dropping or congestion-marking packets received at the base station from the UE. The selective dropping or marking is based on the estimated transmit buffer size and / or the estimated transmit buffer queuing delay.

The invention relates to an edge node for connecting an Ethernet and an optical burst switching network, which comprises physical layer equipment, a first switching module and a second switching module, wherein the first switching module comprises an Ethernet frame analyzing and burst packet grouping unit, a queue managing unit and a scheduling unit; the second switching module comprises a burst packet analyzing and Ethernet grouping unit, a category temporary-storing unit and an inquiry unit. The realizing method for the edge node comprises the following steps of: judging the flowing direction of data; if the data is sent to the burst packet switching network from the Ethernet, analyzing the Ethernet frame, and grouping the burst packets; storing each burst packet according to the destination addresses; finding an idle channel to send the burst packets; if the data is sent to the Ethernet from the burst switching network, analyzing the burst packets and extracting the Ethernet frame; respectively storing the Ethernet frames according to the destination addresses; finding an idle physical interface to send the Ethernet frame, waiting for the next data, and repeating the steps. The invention has the advantages of full duplex switching and blockage improvement.

The invention relates to a speed limit method and device for inflow rate of network. The speed limit method includes steps that when a message arrives, confirming a controlled unit which waits for receiving the message; judging whether the inflow speed rate of the controlled unit arrives at a current limit threshold; if so, setting a congestion CE identification for the explicit congestion notification ECN flag bit of the message; submitting the message with the CE identification to the controlled unit. The speed limit method and device for the inflow rate of the network are capable of carrying out speed limit on the inflow rate of the controlled unit, reducing the active packet loss number and avoiding the problems of network speed rate shaking, high total network load and the like due to mass active packet loss.

The invention discloses a cloud safe and fast distribution network method and a distribution network system. The method comprises the following steps: an authentication device sends a distribution network request to a gateway, and the gateway forwards the distribution network request to a cloud end; the cloud end sends the cloud authentication data packet to the authentication device through the gateway according to the received distribution network request; the authentication device checks and signs the received cloud authentication data packets, verifies that the cloud authentication is legal according to the cloud authentication data packets, and sends the device authentication data packets to the cloud through the gateway after verifying that the cloud authentication is legal; the cloud end checks and signs the received equipment authentication data packets, and sends the network parameters to the authentication device through the gateway after verifying that the authentication device is legal according to the equipment authentication data packets; device authentication packets and cloud authentication packets are carried by WIFI management messages. The invention realizes two-way identity authentication, dynamic key authentication and extreme speed distribution network, greatly improves safety and convenience, and improves user experience.

Methods and apparatus for signalling congestion are described, in respect of a network element (10) operable to forward received data items in a telecommunications networks such as the Internet, and in respect of a processing element operable to process received requests for service. In either case, the element is operable to perform its processing function at up to a processing rate which is subject to variation, and has a queue for items awaiting processing having a counter associated therewith which maintains a count from which a queue metric is derivable. The method comprises: updating the count at a rate dependent on the processing rate (32, 50); further updating the count in response to receipt of items awaiting processing (32, 50); and signalling a measure of congestion in respect of the element in dependence on the queue metric (34, 36, 50). The method further comprises (i) altering the rate at which the count is being updated (54) and (ii) adjusting the counter whereby to cause a change in the queue metric (54) if it is determined (52) that the processing rate has changed.

The invention relates to an active queue management method for a hybrid access network of a wireless local area network and a multi-service broadband network in a software-defined control device, and a corresponding software-defined control device. The method comprises the steps of acquiring a received signal strength identifier of the wireless local area network; based on the received signal strength identifier, determining a first data packet marking probability; and notifying a home gateway to reduce a sending rate of a data source at a first ratio, wherein the first ratio corresponds to the first data packet marking probability. According to the method and the device which are disclosed by the invention, congestion of the hybrid access network consisting of the wireless local area network and the multi-service broadband network can be more reliably avoided; and moreover, flexibility of active queue management also can be improved.

The embodiment of the invention discloses a bandwidth allocation method and device, equipment and a storage medium, and belongs to the technical field of networks. The method comprises the following steps: when detecting that a first network parameter changes, determining a network state measurement duration according to a first data sending rate and a first data volume; obtaining a second networkparameter in the network state measurement duration; and allocating a first bandwidth and a second bandwidth based on the second network parameter, the first bandwidth being a bandwidth used for sending a first data packet of the target service, and the second bandwidth being a bandwidth used for retransmitting a second data packet, which is not successfully received by the receiving device, of the target service. According to the embodiment of the invention, bandwidth allocation can be carried out according to more accurate second network parameters, the effective code rate is improved, andthe audio and video quality is further improved.

The embodiment of the invention discloses a data processing method and device. The data processing method comprises the following steps: monitoring the quality of a radio link; and when the quality ofthe radio link is lowered, reducing sending rate of an RLC (Radio Link Control) layer. According to the data processing method disclosed by the embodiment of the invention, when the quality of the radio link is lowered, the sending rate of the RLC layer is reduced, thereby correspondingly slowing down scheduling of data of a TCP (Transmission Control Protocol) layer or IP (Internet Protocol) layer by the RLC layer, then indirectly adjusting a real-time rate of the TCP layer to ensure that the quality of the radio link is in a relatively good state and further improving the performance of a TCP congestion control mechanism; and therefore, the transmission performance is improved.

The invention relates to the field of wireless transmission, and discloses a UDP-based data transmission rate self-adaption method in a wireless network environment. The method comprises the followingsteps: a data sending end receives a sending task, performs decomposition, stores data contents in a task pool, and sends task data information to a control center at the same time; the control center allocates the task information to a currently valid data transmission queue in the queue pool according to the principle of uniform distribution; a sending thread in a data sending thread pool readsand sends data from the data transmission queue in a queue polling manner; the control center receives a data confirmation message sent by a receiving end, and the control center calculates a data transmission success rate according to the data confirmation message, and adjusts the sending rate according to the success rate; and the unconfirmed data are placed in the data transmission queue againand are retransmitted. By adoption of the technical scheme provided by the invention, the data transmission rate under a wireless channel is improved, and meanwhile, the problem of data transmissionfailure caused by channel congestion due to data burst within a short time is solved.