A packet processing method for avoiding continuous loss of two groups of packets due to packet loss

Abstract

The invention discloses a processing method for avoiding the loss of two consecutive groups of messages due to packet loss. The fixed-length message matches the message headers of the obtained messages. Message content, while pre-reading the message content, it is also necessary to detect whether the message content contains a message header. If the packet header is not detected in the pre-read message content, then the read message is complete; if the packet header is detected in the pre-read message content, it is considered that the received message content has packet loss. Read the content of the next message after checking the message header. For a message with a message tail, first match the message header of the message. After the match is successful, it is also necessary to check whether the message contains a message tail when reading the message, and stop reading when the message tail is detected. Take, repeat and match the packet header. The present invention prevents the next message from being mistakenly ignored due to the phenomenon of packet loss occurring in the content of the previous message.

Description

technical field [0001] The invention relates to a message processing method for avoiding continuous loss of two groups of messages due to packet loss, and belongs to the field of information technology. Background technique [0002] Electronic devices (such as GPS receivers) often output information such as the position measured or sensed by the device through ports such as RS232 and USB or through wireless networks. Due to objective reasons such as working scenarios and message transmission paths, codeless and packet loss may occur during the process of sending, transmitting, and receiving messages. [0003] The message reading technology is mainly divided into two parts, which are message header recognition and message content reading. In the past, the more common method of processing messages was to detect whether the received messages contained identifiable message headers, and once the message headers recognizable by the system were detected, start to read the message ...

AI Technical Summary

Problems solved by technology

The main disadvantage of the above method is that

First of all, the above method does not detect the content of the message, so it is impossible to determine whether the content of the read message is lost or not.

Secondly, if there is a packet loss phenomenon in the previous message, but it is not detected in time, it is possible to read the header of the next message into the message content, causing the next message to be incomplete. The header of the packet cannot be detected at the next packet header detection

As a result, the content of the next message cannot be read because there is no message header

In the application of the above method, it is possible to absorb the header of the next message when the packet loss of the previous message occurs, resulting in the loss of both sets of message information.

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