A high-speed ppp implementation method of wireless data card on linux system

Abstract

The invention relates to the field of data communication, and in particular relates to a high-speed PPP implementation method for a wireless data card in a Linux system. The existing PPP dial-up networking rate is low. In the scheme provided in the invention, for a Modem interface of a wireless module, character equipment is created and used for dialling up and hanging up; network equipment is created and used for performing message processing; the fact that only one equipment driver can access a practical Modem interface at the same time can be ensured through a mutual exclusion mechanism; a message practically received and sent from the Modem interface is a meaning transferred PPP message; after receiving the PPP message, a network interface needs to identify and extract an original message, remove transferred meanings, check a FCS, perform Ethernet head calculation and package; when the message is sent, an Ethernet head is analyzed and peeled; calculation is carried out; and the FCS and character transferred meanings are added. Because a network interface model of a kernel is used, the packet receiving and sending performance is greatly improved; because the driver completes nearly all message processing, a user program is simplified; and the separated character equipment is independently used for dialling up and hanging up, so that the user process is relatively convenient to process.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a high-speed PPP implementation method of a wireless data card on a Linux system. Background technique [0002] In the era of 3G technology, the data card module mainly uses PPP dial-up to access the Internet. There is also a complete set of solutions to support PPP dial-up Internet access on Linux systems. The drivers of the kernel-mode related solutions mainly include tty serial port driver and usb serial port driver. The serial port itself is a low-speed device, the tty serial port driver is also a low-speed device driver, and the usb serial port driver is also designed for low-speed USB devices. Due to the constraints of the implementation scheme, the PPP dial-up Internet access rate in practical applications is often very low, usually only up to 2Mbps within. [0003] In the era of 3G technology, the bandwidth that can be provided by the wireless side is relatively limited...

AI Technical Summary

Problems solved by technology

[0011] In the above-mentioned original PPP mode, the module presents a Modem interface to the system side, and the driver module is only responsible for creating the corresponding character device, and the user program needs to complete dialing, packet, packet sending, cyclic packet receiving, decapsulation message, and abnormal message processing , hang up and other complicated operations, the realization of user programs is often relatively complicated, due to the use of serial character device drivers, the rate and efficiency of sending and receiving messages are very low

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