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

A transmission control protocol and data transmission technology, applied in wireless communication, network traffic/resource management, electrical components, 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: 2018-11-13
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 transmission data scheduling method and transmission control protocol
  • A multi-path parallel transmission data scheduling method and transmission control protocol
  • A multi-path parallel transmission data scheduling method and 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 transmission data scheduling method and a transmission control protocol, characterized in that the dynamic value cwndr of the congestion window is adjusted in the following manner: when the path r successfully receives an ACK, the congestion window cwndr increases by α / cwndtotal; When path r detects a packet loss, the congestion window cwndr is reduced by max(β*cwndr, cwndr / 2). The multi-path parallel transmission data scheduling method based on the dynamic adjustment of the congestion window proposed by the present invention fully considers the influence of the link delay differentiation on the transmission quality, and introduces the path delay factor parameter in the congestion window control mechanism, which can realize the differentiation of the path transmission quality Effective reduction to avoid excessive congestion of the optimal link, thereby improving MPTCP transmission throughput and enhancing 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 & AuthorityPatents(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
OwnerBEIJING UNIV OF POSTS & TELECOMM