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Method for solving CANTP multi-frame packet loss retransmission

A packet loss retransmission and continuous frame technology, applied in the field of CANTP multi-frame packet loss and retransmission, can solve the problem of bandwidth waste

Active Publication Date: 2021-04-23
WUXI SHENLIAN SPECIAL PURPOSE VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If frame loss occurs late in the packet transmission, the waste of bandwidth will be great

Method used

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  • Method for solving CANTP multi-frame packet loss retransmission
  • Method for solving CANTP multi-frame packet loss retransmission

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Embodiment Construction

[0034] Specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0035] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0036] The invention patent aims to solve the defect that the CANTP protocol does not deal with the frame loss problem, and effectively improve the data transmission efficiency in the frame loss scenario.

[0037] Depend on figure 1 It can be seen that after the transmission period of each continuous frame CF is over, the receiver will respond with a flow control frame FC to limit the behavior of the next continuous frame CF transmission period. This feature can be obtained f...

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Abstract

The invention discloses a method for solving CANTP multi-frame packet loss retransmission, which mainly comprises the following steps that: a data receiver stores data of a lost frame in spare bytes of a flow control frame and sends the flow control frame carrying the data of the lost frame to a data sender; data is resent to the data receiver for the listed lost data. The feedback of the packet loss information is realized under the condition of not increasing the type of the existing CANTP message.

Description

Technical field: [0001] The invention belongs to the technical field of vehicle networking data transmission, in particular to a method for solving CANTP multi-frame packet loss and retransmission. Background technique: [0002] A single data packet of ordinary CAN communication can only transmit a maximum of 8 bytes of data. When a larger data packet needs to be transmitted, the data needs to be divided into packets according to the provisions of ISO15765-2 (hereinafter referred to as the CANTP protocol). , reassemble the subpackage at the receiving end, and then send the reassembled packet to the application layer for processing. The general process is as follows figure 1 Shown: [0003] (1) The sender transmits the first frame message FF, which will carry the length of the entire data block to be transmitted, so that the receiver can open up enough receiving buffer; [0004] (2) After receiving the first frame message, the receiver returns the flow control frame FC, wh...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L1/16
CPCH04L67/12H04L1/1607
Inventor 苗百会王瑞张宇孙雷霸王辉王万荣
Owner WUXI SHENLIAN SPECIAL PURPOSE VEHICLE
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