30results about How to "Improve link utilization" patented technology

Methods and apparatuses for improved data transmission control protocols. Acknowledgment streams are used by a sender process to generate various estimates of eligible transmission rates that are fair to other processes competing for bandwidth across a common network. In addition, the acknowledgment streams are used in conjunction with various other standard transmission control protocol metrics to adapt a filter for use on the rate estimates. Additional improvements in throughput may no be had by measuring the overall capacity of the computer network using packet pair dispersion measurements and adaptive network probing. In addition, the methods may be adapted for both packet transmission and video streaming applications.

The invention discloses an MPTCP path management method based on a multi-path transmission protocol and a device. The MPTCP path management method based on the multi-path transmission protocol comprises steps of obtaining transmission state information of each TCP sub-path in MPTCP connection, calculating the QOS value of each TCP sub-path in the MTCP connection based on the transmission state, determining the TCP sub-path where the transmission quality is deteriorated according to the QOS value, and setting the TCP sub-path as a standby state. The method and device of the invention can quantify the communication quality of each path as QoS according to the performance comparison of each path, detects the path where the communication quality is changed during the communication process, can analyze the path parameter of each MPTCP path in real time, guarantees that the transmission path used in the network can realize the maximum handling capacity and the bandwidth utilization, enables the network handling capacity to change smoothly, and improves the link utilization rate, the handling capacity and the robustness of the handling capacity.

The invention discloses a multipath transport control protocol (MPTCP) based congestion control method and apparatus. The method comprises the steps of establishing an MPTCP connection, and allocating a buffer region for each TCP substream in the MPTCP connection; estimating the occupation ratio of the buffer region of each TCP substream; and determining the congestion level of the TCP substream according to the occupation ratio of the buffer region, and adjusting the transmission rate of the TCP substream based on the congestion level. According to the MPTCP based congestion control method and apparatus, the buffer region is split for each substream, then whether congestion exists is detected accurately according to the use ratio of the buffer region of each substream, the traffic is regulated and controlled level by level according to the congestion level, and MPTCP transmission fairness is also taken into consideration, so that the network throughput change more smoothly, and the link use ratio, throughput and robustness of the MPTCP are improved.

The invention provides a link adaptation-based heterogeneous network TCP congestion control method. According to the method, an adaptive growth factor is introduced to an exponential type window growth function, so that window growth rate can be matched with link status, and in a packet loss differentiation strategy, an adaptive queue threshold is adopted to improve the performance of a TCP in a wireless environment; the window growth rate and a back-off strategy are adaptively adjusted according to links, so that the degradation of the transmission performance of the TCP caused by different link bandwidth, the difference of time delay and high packet loss can be avoided; a strategy for accelerating the convergence of a congestion window is adopted, and only a transmitting-end TCP needs to be modified, and therefore, the method can be gradually deployed on and applied to the Internet; and according to performance analysis and evaluation, the fairness of TCP congestion control algorithms, the utilization rate of the links and the fairness of end-to-end round-trip delay can be improved.

A method and apparatus for increasing the capability of a network topology model having a plurality of nodes connected by existing links to maintain service continuity in the presence of faults. The steps of the method include adding new links to the network topology model to protect against single node failures, and adjusting link weights for the network topology model to reduce at least one of a cost of network operation and an imbalance in link utilizations. Preferably, the link weights are adjusted to reduce the imbalance in link utilizations without deteriorating the cost of network operation. The link weights are preferably adjusted to reduce the cost of network operation without increasing the imbalance in link utilizations. Preferably, the link weights are adjusted to reduce the cost of network operation without increasing the imbalance in link utilizations while keeping the utilization for each link below a specific threshold. In addition, links can be added to the network topology model to reduce the cost of network operation.

The invention discloses an SDN (Software Defined Network) core network QoS (Quality of Service) routing optimization algorithm based on reinforcement learning. The SDN core network QoS routing optimization algorithm comprises the following steps: acquiring network topology and real-time node information and link information through an SDN controller; according to the obtained network topology and real-time node information and link information, calculating a reward matrix by using a QoS network routing optimization model; initializing and updating the Q table; and obtaining a required optimal forwarding path according to the Q table which is iteratively updated. According to the method, multiple QoS intentions such as low delay, low jitter, large bandwidth, preferential use of private lines and service levels can be met, the shortest forwarding path meeting the QoS requirement can be found for each service flow, the link utilization rate is high, network congestion can be effectively prevented and reduced, and the network resource utilization rate is improved.

The invention discloses a fault-tolerant deflection routing method and device for a bufferless network-on-chip. The method comprises the following steps of: (1) connecting adjacent routers by configurable bidirectional transmission links; (2) coding before sending a data packet, decoding after receiving the data packet, and entering next step when decoding occurs appointed error; (3) pausing the error chain circuit, detecting the chain circuit, if error does not exist during detection, restoring the chain circuit, otherwise, marking the chain circuit to be faulty; and (4) allocating the transmission direction of the chain circuit with unidirectional fault according to the receiving and sending conditions at two ends of the normal chain circuit. The device comprises routers and a direction dispenser for controlling the transmission direction of the chain circuit between the adjacent routers, wherein each router comprises a computing unit, an exchange dispenser, a cross bar switch, a packet updating unit, multiple registers, a testing control unit and multiple direction-allocable transmission control units which are corresponding to the registers. The method and device have the advantages of good fault tolerance, high chain circuit utilization rate and small area expense.

The invention discloses a framing and interconnection transmitting method in an electricity utilization information collecting system. The framing and interconnection transmitting method in the electricity utilization information collecting system comprises the following steps: setting the length of a single frame after framing according a transmitting mechanism, and expressing that the frame is a complete frame or a subsequent frame by 'frame tagging bits'; and reading descending data of electricity quantity, electric energy meter information and the like in an intelligent electric energy meter into a buffer region of a collector, judging the completeness of a data frame by control codes, and assembling the data frame in the collector. The electric energy meters manufactured by different meter manufacturers have different framing lengths, but the integrity of the data frame can be determined only according to the tagging bits, and the frame losing and frame assembling errors can be prevented, so that the collector can be suitable for the electric energy meters of all manufacturers, and the interconnection and communication properties with the electric energy meters are improved. By adopting the framing interconnection transmitting method in the electricity utilization information collecting system, a low-voltage electricity utilization information collecting system is introduced for the framing transmitting method, so that the ascending data constant-length framing transmission of the collector is realized, and the transmission velocity and the link utilization ratio are improved.

The invention provides a data transmission method between data centers. The data transmission method between the data centers includes the following steps that a first compressed data package is obtained after first data to be transmitted are compressed by a first server of a first data center and sent to a first acceleration device through a first interchanger, the first compressed data package is accelerated through the first acceleration device, the first acceleration device sends the first accelerated compressed data package to a second interchanger of a second data center through the first interchanger, the second interchanger sends the first compressed data package to a second acceleration device, the second acceleration device restores the first accelerated compressed data package to obtain the first compressed data package, and the first compressed data package is sent to a second server through the second interchanger. The data transmission method between the date centers can achieve flow control aiming at different application programs and has high efficiency and usability. The invention further discloses a data transmission system and a subsystem of the data transmission system.

A call services manager and methods for improving the quality and efficiency of voice of Internet Protocol (“VOIP”) calls are provided. In an embodiment a method to improve communication link utilization on a call requiring the use of a central service platform is provided. An additional method is provided to validate caller identification information exchanged between originating and terminating communication devices in an IP voice network. In a further aspect of the invention, a method using a call services manager is provided to dynamically switch from one call route to another based on quality of service considerations. A call services manager is also provided. The call services manager is a software proxy that can reside at any type of network element. The call services manager includes software modules to implement the above methods for improving VOIP quality, and can include other call service and quality improvement modules.

The embodiment of the invention provides a message processing method and device. The method comprises the steps of receiving a DNS response message returned by a DNS domain name server, wherein the DNS response message carries an IP address of a data server; obtaining a plurality of data links between a routing device and the data server according to the IP address of the data server; selecting the data link which is allowed to be used and has the highest idle bandwidth from the plurality of data links; and determining the selected data link as the target data link for transmitting a data request message of which destination address is the IP address. Through application of the method provided by the embodiment of the invention, the data link which is allowed to be used and has the highest idle bandwidth is selected for transmitting the data request message of which destination address is the IP address, further the load balancing of the plurality of data links between the routing device and the data server can be realized, and further a link utilization rate can be improved. Artificial participation is removed in the process of the improving the link utilization rate, so the artificial cost is relatively low.

A system and method for implementing collision resolution scheduling of satellite optical burst switch. According to the topology of space-based broadband transmission backbone network and the statusof each switching node, through the scheduling method of network resources pre-allocation, at that boundary of the space-based broadband transmission backbone network, the data to be transmitted and exchanged to the space-based broadband transmission backbone network is controlled, the switching time and the forwarding path of each optical burst data entering into the space-based broadband transmission backbone network are planned in advance, and the collision resolution scheduling of the optical burst data exchange of the space-based broadband transmission backbone network is realized. The optical burst data of the space-based broadband transmission backbone network is generated by the electric domain. After completing the electro-optical conversion at the edge node of the backbone network, the optical burst data enters the backbone network for optical burst exchange. After reaching the destination edge node, the optical burst data is converted, and then the data is sent to the processing terminal to complete the data routing exchange process. Through pre-planning and scheduling, the system can resolve the collision of satellite optical burst switch by using network resources.

Disclosed is a method of controlling communication rates over a link within a communications system. The method includes storing packets associated with voice and data traffic in individual buffers, and determining an instantaneous number of active voice and active data traffic in the individual buffers. Furthermore, a total link bandwidth that the active voice traffic will consume during a frame interval is determined, and an available link bandwidth, for the active data traffic, remaining after the total link bandwidth is calculated. Finally, rate control is applied to fit the active data traffic in the available link bandwidth. Rate control is achieved by allowing a data session to send data at a portion of its full-rate, where the portion is determined as a function of the instantaneous load generated by all sessions carried on the link.

The invention relates to the technical field of communication, and provides a message loop elimination method and a distributed elastic DR device. The message loop elimination method is apply to the distributed elastic DR device. A local DR device includes a second DR interface constituting a DR group with each first distribute aggregated DR interface of a peer DR device, a unidirectional isolation group is arranged for an internal control link port IPP of a local DR device. The unidirectional isolation group comprises a second DR interface satisfying a preset condition. The method comprises:receiving a message sent by a peer DR device from the IPP; sending the message through an interface other than a second DR interface in the unidirectional isolation group. Blind forwarding is avoided,thus avoiding the emergence of message loops, and implementation is realized simply without the use of complex protocol algorithms, avoiding low link utilization and waste of network bandwidth resources.

The invention discloses a satellite network active queue management method based on the sizes of groups. The method includes the following steps that firstly, the sizes of groups in which group data just arrive are acquired; secondly, according to the sizes of the groups, the value of a packet loss probability impact factor function based on the sizes of the groups is calculated; thirdly, the packet loss probability pz of a PID controller suitable for a satellite network is calculated, the total packet loss probability p of a router is calculated according to the packet loss probability pz and the value of the packet loss probability impact factor function, the size of a router cache is set to be qlim, and if q(k) is larger than or equal to qlim, the group data are abandoned; if q(k) is smaller than or equal to qlim, the probability for abandoning the group data is p; fourthly, and the groups which are not abandoned enter a queue for queuing. The total packet loss probability of the router is calculated according to different sizes of the groups, in other words, the large groups have the small packet loss probability, the small packets have the large packet loss probability, and therefore data packets with the large sizes of the groups can be protected.

The invention concerns SEAMA, a source encoding assisted multiple access (MAC) protocol, for integrating voice and data traffic in a wireless network. SEAMA exploits the time variations of the speech coding rate, through statistical multiplexing, to efficiently use the available bandwidth and to increase the link utilization.

The invention discloses a framing and interconnection transmitting method in an electricity utilization information collecting system. The framing and interconnection transmitting method in the electricity utilization information collecting system comprises the following steps: setting the length of a single frame after framing according a transmitting mechanism, and expressing that the frame is a complete frame or a subsequent frame by 'frame tagging bits'; and reading descending data of electricity quantity, electric energy meter information and the like in an intelligent electric energy meter into a buffer region of a collector, judging the completeness of a data frame by control codes, and assembling the data frame in the collector. The electric energy meters manufactured by different meter manufacturers have different framing lengths, but the integrity of the data frame can be determined only according to the tagging bits, and the frame losing and frame assembling errors can be prevented, so that the collector can be suitable for the electric energy meters of all manufacturers, and the interconnection and communication properties with the electric energy meters are improved. By adopting the framing interconnection transmitting method in the electricity utilization information collecting system, a low-voltage electricity utilization information collecting system is introduced for the framing transmitting method, so that the ascending data constant-length framing transmission of the collector is realized, and the transmission velocity and the link utilization ratio are improved.

The invention discloses a path management method and device based on the multi-path transmission protocol MPTCP, wherein the method includes: obtaining the transmission status information of each TCP sub-path in the MPTCP connection; The QOS value of the TCP sub-path; determine the TCP sub-path whose transmission quality deteriorates according to the QOS value, and then set the TCP sub-path to a standby state. The method and device of the present invention can quantify the communication quality of each path as QoS according to the performance comparison of each path, and detect the path whose communication quality changes during the communication process through the value of QoS, and analyze each path in real time. The path parameters of MPTCP ensure that the transmission path used in the network can achieve the maximum throughput and bandwidth utilization, make the network throughput change more smoothly, and improve the link utilization, throughput and robustness of MPTCP.

According to the invention, a passive optical distribution node is constructed, so that a plurality of servers connected to the same passive optical distribution node form a calculation cluster, the calculation cluster is used as a basic unit to form a data center electro-optical hybrid double-layer access network, and the network access function of the servers in the data center is realized. Flowconvergence of m servers in one calculation cluster is achieved through passive optical distribution nodes, and the high link utilization rate of a connecting link of a passive optical distribution node convergence switching interface and an inter-cluster switch switching interface is achieved. The calculation clusters can realize direct communication of servers in the clusters through channels in the clusters without forwarding of electric switching equipment, so that the forwarding time delay of inter-cluster data communication is reduced; the network provided by the invention can greatly reduce the number of access layer network electric switching equipment, reduce network power consumption and simplify the complexity of layout and wiring of an upper layer network; Meanwhile, the tunable transceiver is configured for the dual-transceiving network interface card of the server, so that the network bandwidth can be flexibly configured according to the real-time network load.

The invention discloses an SDN network-based multi-QoS load balancing routing method, a storage medium and a terminal. The method comprises the steps: determining a plurality of service quality impactfactors of the SDN network, and calculating the weight corresponding to each service quality impact factor through employing an AHP analytic hierarchy process; calculating the weight of each link inthe SDN network based on the calculated weight of each service quality influence factor; and selecting a corresponding optimal load balancing route for the arrived data flow based on the calculated weight of each link in the SDN network. According to the scheme, the route meeting the multi-user service quality requirement can be selected in the SDN network. The service quality is improved, and thesatisfaction degree of users is improved.

The invention belongs to the technical field of avionics, and discloses a method for processing bursts of critical services in an airborne avionics network. The method for processing bursts of critical services in the airborne avionics network is based on business planning and partition scheduling of a TTE network The mechanism divides the time axis into multiple basic periods, and each basic period is divided into two sections: the TT segment that only transmits TT and the ET segment that transmits RC / BE. The present invention solves the problem that the network carries burst messages without causing packet loss through the replacement of key burst services and the one-way conversion of downgrading priority. The optimized ET scheduling method is based on the level of burst services, which not only ensures The deterministic delay of the key services sent will not bring much delay impact on the original TT and RC services, and also improve the link utilization rate of the TT segment.