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Data transmission method

A data transmission method and data transmission technology, applied in the direction of digital transmission system, transmission system, data exchange network, etc., can solve problems such as real-time inspection of link status and failure of transceivers to detect link failures in time, etc. The effects of order-preserving processing, preventing network congestion, and reducing message delay

Inactive Publication Date: 2008-04-09
ZTE CORP
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  • Abstract
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Problems solved by technology

Moreover, this method does not mention the real-time inspection of the link status, and the transceiver cannot detect the failure of the link in time

Method used

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Embodiment Construction

[0028] The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] As shown in Figure 1, the present invention provides a data transmission method, comprising the following steps:

[0030] In step S102, a connection is established between the sending end and the receiving end and both are in an open state, the sending end merges or splits the short messages into data packets, and sends the data packets to the receiving end in sequence.

[0031] In step S104, the receiving end checks after receiving the data packet, and feeds back a negative acknowledgment message indicating that the data packet is lost to the sending end after finding that a certain data packet is lost.

[0032] Step S106, the sending end resends the lost data packet to the receiving end according to the negative acknowledgment message.

[0033] As shown in FIG. 2 , the method of the present invention divides RUDP into an...

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Abstract

The invention provides a data transmission method which comprises the following steps: step 1, a connection is established between a transmitting terminal and a receiving terminal and each terminal is set in opened state, the transmitting terminal merges or splits short messages to form data packets and sends the data packets sequentially to the receiving terminal; step 2, the receiving terminal receives the data packets and then checks, and feedbacks a negative response message indicative of the data pack loss to the transmitting terminal when detecting the loss of a certain data pack; step 3, the transmitting terminal resend the lost data pack to the receiving terminal based on the negative response message, the receiving terminal receives the data followed by unpacking or packing. With the method, the transmitting terminal can instantly detect the message sequence that doesn't arrive at the receiving terminal, and retransmit the lost data pack in time, thereby reducing the time delay of the lost message.

Description

technical field [0001] The invention relates to the communication field, in particular to a data transmission method. Background technique [0002] The communication protocols between two nodes in the network mainly include UDP (User Datagram Protocol, User Datagram Protocol) and TCP (Transfer Control Protocol, Transmission Control Protocol). The TCP protocol is a reliable connection-oriented protocol. Using this protocol requires an More processor (CPU) time, not efficient. In order to improve the efficiency of reliable transmission, a reliable user datagram protocol (RUDP, Reliable UDP) is proposed. Compared with TCP, the efficiency of RUDP is improved. [0003] Most of the existing RUDP protocols adopt an acknowledgment (ACK) method. Every time the sender sends a message, the receiver makes an acknowledgment to tell the sender that it has received the message. When the sending end sends a message, it generally sets and starts a timer and waits for the receiving end to r...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18H04L1/00H04L12/56H04L29/06H04L47/43
Inventor 赵凯杨骐徐正霞
Owner ZTE CORP
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