Embedded dual-channel network data packet unpacking and grouping method and system

Abstract

The invention relates to an unpacking and packing method and system based on an embedded two-channel network data package. The unpacking and packing method comprises the following steps of: firstly creating a virtual network card in an embedded drive, and creating a buffer queue to store the network data package in the virtual network card; if the length of data stored in the buffer queue is less than a frame length, taking out all the data, and putting the data in a hardware buffer region; if the length of data stored in the buffer queue is more than the frame length, putting the data with the length being less than the frame length into the hardware buffer region; marking length information of residual data of the network data package at the head of a transmit frame after the last frame is sent; and packaging the network data package by utilizing a receiving terminal according to the length information of the residual data of the network data package and the length information recorded in the network data package, wherein the buffer queue comprises a signaling data buffer queue and a business data buffer queue, and signaling data is preferentially sent by a sending terminal. According to the unpacking and packing method and the unpacking and packing system, a service channel and a data channel are separated, the preferential sending of the signaling data is guaranteed, the bandwidth resource is saved, and the stability and the real-time response of a communication link are guaranteed.

Description

technical field [0001] The invention belongs to the field of embedded technology and network communication technology, and relates to an embedded dual-channel network data packet unpacking and grouping method and a system applying the method. Background technique [0002] Today's embedded network communication protocols are mainly based on the TCP / IP protocol. The data packets generated by the TCP / IP protocol are sent and received by the network card driver in the embedded system. Most of the data received by the network card driver from the network card must be processed by hardware (such as FPGA). At the same time, the data frame received from the hardware (such as FPGA) should also be converted into a network data packet conforming to the TCP / IP protocol and handed over to the kernel, so the embedded system needs to solve the format between the TCP / IP protocol data packet and the underlying data frame conversion problem. In the embedded system based on satellite link, si...

AI Technical Summary

Problems solved by technology

However, this scheme will cause a network data packet to be split into N frame length packets when the data packet length is much larger than the frame length, and then encapsulate the IP header information, which will cause an IP data packet to become N IP data packets, so (N-1) headers are added, resulting in a decrease in the proportion of data information, resulting in a waste of bandwidth resources

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