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Congestion relieving method based on QUIC protocol

A protocol and congestion window technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems of low efficiency of the QUIC protocol and achieve the effect of improving throughput

Active Publication Date: 2016-08-03
SICHUAN UNIV
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a congestion improvement method based on the QUIC protocol, to solve the problem of low efficiency of the QUIC protocol under high bandwidth and high delay, and to improve the performance of the QUIC protocol under high bit error rates

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Embodiment Construction

[0041]The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The invention proposes a congestion window growth method based on queuing delay, and at the same time, the maximum congestion window can be changed adaptively. For convenience of description, the present invention is described as QUIC+ (QuickUdpInternetConnection+). The present invention can make the congestion window reach the target window value more quickly, and finally can make the performance of the QUIC protocol better in the environment of high bandwidth, high delay and high bit error rate.

[0042] The architecture diagram of UDP-based reliable transmission protocol QUIC is as follows figure 1 As shown, from the figure, it can be seen that the QUIC protocol is an application layer protocol based on UDP, which solves many defects of TCP in the application. At the same time, QUIC is implemented in the application layer without mod...

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Abstract

The invention provides a congestion relieving method based on a QUIC protocol .Time delay information is added in a congestion algorithm, and the value of alpha is changed in a self-adaptive mode to judge the current network condition by comparing the last time RTT and the current RTT; then, a current target window value is adjusted according to the current network condition, and then a congestion window is changed based on a thrice increasing curve of a cubic algorithm .By means of the reliving mode, the current network condition can be more accurately judged with the QUIC protocol with higher timeliness, and the congestion window can be quickly changed to fully utilize the bandwidth .Meanwhile, the maximum congestion window limit 200 exists in the QUIC protocol, the congestion window cannot exceed 200 no matter how the congestion window grows, and the throughput rate of the QUIC protocol in the high-bandwidth and long-time-delay network environment can be greatly reduced by the limit .

Description

technical field [0001] The invention relates to the field of reliable transmission of the application layer of a computer network based on UDP (User Data Packet Protocol), in particular to a congestion improvement method of the QUIC protocol. Background technique [0002] In 2013, Google proposed the QUIC protocol, which realized reliable transmission based on UDP. The protocol is implemented in Google Chrome and is mainly focused on speeding up page access. Since the QUIC protocol is an application layer protocol based on UDP, it has better efficiency in handling packet loss and initial connection. QUIC mainly solves two problems of traditional TCP (Transmission Control Protocol). First, the traditional TCP is an orderly transmission, that is, in TCP, if a packet is lost, the subsequent packets must wait for the packet to be retransmitted before submitting the data to the application layer. But UDP supports out-of-order transmission. If a packet is lost, the following pa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/801H04L12/803H04L12/805H04L12/825H04L47/27H04L47/36
CPCH04L47/10H04L47/12H04L47/122H04L47/25H04L47/36H04L43/0864H04L47/27
Inventor 王俊峰刘婷高展丁雪峰
Owner SICHUAN UNIV
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