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A multi-path parallel-transmitted data scheduling method and a transmission control protocol

A transmission control protocol and data transmission technology, applied in network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as delayed data packet processing, excessive use of optimal links, and inability to effectively balance loads, etc., to achieve Improve transmission throughput, enhance user experience, and avoid excessive congestion

Active Publication Date: 2015-11-04
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] This algorithm associates the congestion window of each sub-flow with the performance of other sub-flows, and the window change is determined by the size of the total congestion window, which effectively realizes resource sharing, but also has the following disadvantages: 1) Excessive use of the optimal link , unable to effectively balance the load, affecting the overall transmission performance of the MPTCP transmission link; 2) unable to solve the serious differentiation of transmission quality between sub-stream links, a large number of out-of-order data packets are generated at the receiving end, and the processing of data packets by the application layer is delayed Process, affecting the overall transmission quality of MPTCP

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  • A multi-path parallel-transmitted data scheduling method and a transmission control protocol
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  • A multi-path parallel-transmitted data scheduling method and a transmission control protocol

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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] In MPTCP, the data to be transmitted is assigned two sequence numbers, the subflow layer sequence number and the data layer sequence number. The serial number of the substream layer is the serial number in TCP, and the serial number of the data layer is encapsulated in the option field. Due to the link delay gap, when the data packet arrives at the buffer space of the receiving end, it is an out-of-order data packet, and the data packet that arrives first has to wait for the data of the high-latency link to reach the buffer space of the receiving end until the orderly data packet is formed and uploaded to the application layer Perform data processing. In addition, the Smallest-RTT value of the RTT value in MPTCP t...

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Abstract

The invention discloses a multi-path parallel-transmitted data scheduling method and a transmission control protocol. The characteristics are that a dynamic value cwnd[r] of a congestion window is adjusted according to the following mode: when a path r successfully receives an ACK, the cwnd[r] of the congestion window increases by alpha / cwnd[total]; when the path r detects that a grouped packet is lost, the cwnd[r] of the congestion window decreases by max(beta*cwnd[r], cwnd[r] / 2). The multi-path parallel-transmitted data scheduling method based on congestion window dynamic adjusting of the invention gives full consideration to influences by link delayed differentiation to transmission quality; path delay factor parameters are introduced in a congestion window control mechanism so as to realize effective reduction of path transmission quality differentiation and avoid excessive congestion of the optimal link, thereby improving the MPTCP transmission throughput and improving user experience.

Description

technical field [0001] The invention relates to a multi-path parallel transmission technology in a multi-homed terminal, in particular to a multi-path parallel transmission data scheduling method and a transmission control protocol. Background technique [0002] The multi-homed terminal realizes the parallel transmission of data through multiple paths through the Multi-path Transmission Control Protocol (MPTCP). With the joint utilization of multiple different network access technologies, combined with the congestion control algorithm and data scheduling method, it can effectively Improve the throughput of multipath parallel transmission. The MPTCP data scheduling method is divided into three steps: 1) Find an available link among multiple links (the congestion window cwnd has space); 2) Select a link among the available links for data scheduling; 3) Make a decision on the link The upload packet size. When data scheduling is performed in multiple sub-flow links, it is nece...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/08H04W72/12
CPCH04W28/08H04W72/52
Inventor 唐碧华范文浩冯英倬吴帆张洪光
Owner BEIJING UNIV OF POSTS & TELECOMM
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