Data transmission method and system, data sending device and data receiving device

Abstract

The invention discloses a data transmission method and system, a data sending device and a data receiving device. The method comprises the following steps: the data sending device sends data information of data to be transmitted to the data receiving device, receives a fragmentation request sent by the data receiving device according to the data information, and sends a corresponding data fragmentto the data receiving device according to the fragmentation request, and the data receiving device determines whether all data fragments of the data to be transmitted are received according to a datalength and / or the number of fragments contained in the data information, and in the case that all data fragments of the data to be transmitted are received, integrates the received data fragments toobtain integrated data, and checks the integrated data according to a data check code contained in the data information. By adoption of the data transmission method disclosed by the invention, the situation of data transmission leakage in a data transmission process can be prevented, and the integrity of the data received by the data receiving device is ensured.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method, system, data sending device, and data receiving device. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the development of computer and Internet technologies, users can communicate with other networked devices or access various network applications or services through networked devices (for example, clients such as mobile phones and computers) at any place and any time. Whether it is communicating between devices or accessing various network applications or servers, data transmission will be involved. [0004] Due to abnormal network transmission or other reasons, data may be leaked or lost during transmission, making the data received by the dat...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a data transmission method, which is applied to a data sending device to solve the technical problem in the prior art that the data received by the data receiving device is incomplete due to leakage or loss during the data transmission process. Including: sending the data information of the data to be transmitted to the data receiving device, wherein the data information includes the data length of the data to be transmitted, the data check code and the number of fragments, and the number of fragments is to divide the data to be transmitted into multiple data The number of fragments; receive the fragmentation request sent by the data receiving device according to the data information, where the fragmentation request is used to request one or more data fragments of the data to be transmitted; according to the fragmentation request, the corresponding data fragmentation Send to the data receiving device, wherein, the data receiving device determines whether to receive all the data fragments of the data to be transmitted according to the data length and / or the number of fragments contained in the data information, and after receiving all the data fragments of the data to be transmitted In the case of , the received data fragments are integrated to obtain the integrated data, and the integrated data is verified according to the data verification code contained in the data information

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