Retransmission packet loss detection method and device for tcp protocol
A loss detection and packet retransmission technology, applied in the Internet field, can solve the problems of whether the data packet is lost, and the retransmission cannot be determined in time, so as to achieve the effect of timely determination.
Active Publication Date: 2017-11-14
CHINACACHE INT HLDG
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[0014] The main purpose of the present invention is to provide a retransmission packet loss detection method and device for the TCP protocol, to solve the problem in the prior art that it is impossible to determine in time whether the retransmitted data packet is lost
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[0032] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0034] It should be noted that the terms "fir...
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The invention discloses a method and a device for detecting retransmission packet loss of a TCP (transmission control protocol). The method for detecting retransmission packet loss of the TCP includes: transmitting to-be-retransmitted data packets in a transmit queue to a receiving end on the basis of the TCP, wherein the receiving end is used for receiving the data packets transmitted on the basis of the TCP; confirming a first data packet in the transmit queue, wherein the first data packet refers to the data packet which has already retransmitted once without first confirmation information returned from the receiving end; detecting whether second confirmation information corresponding to a second data packet in the transmit queue is received or not after the first data packet is transmitted, wherein the second data packet refers to the Nth data packet or any data packet behind the Nth data packet after the first data packet in the transmit queue is transmitted; if the detection shows that the second confirmation information is received after the first data packet is transmitted, confirming that the first data packet is lost. The method and the device for detecting retransmission packet loss of the TCP have the advantage that the lost retransmitted packets can be confirmed immediately.
Description
technical field [0001] The present invention relates to the Internet field, in particular to a retransmission packet loss detection method and device for the TCP protocol. Background technique [0002] Transmission Control Protocol (Transmission Control Protocol, TCP) is a connection-oriented, reliable, byte-stream-based transport layer communication protocol, and is the underlying protocol basis for many daily applications such as HTTP, FTP, SSH, SMTP and other services. [0003] TCP's cumulative confirmation: Each byte of data transmitted by TCP usually corresponds to a unique 32-bit number. When communicating through TCP, when the sender of the data packet receives the 32-bit acknowledgment sequence number carried in the response message of the receiver, it is considered that all data bytes below the acknowledgment number have been received. This is the so-called "cumulative confirmation". [0004] TCP SACK option: When the TCP receiving end receives data packets that d...
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IPC IPC(8): H04L1/16
Inventor 李易
Owner CHINACACHE INT HLDG