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High-level data link control data sending method

A technology of data link control and data transmission method, applied in the field of information transmission, can solve the problems of long time consumption and complex retransmission process, and achieve the effect of reducing occupied time and increasing cost

Inactive Publication Date: 2015-01-14
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention provides a method for sending HDLC data, which solves the problem of complex and time-consuming retransmission process due to the calculation of judging whether packet loss occurs based on the ACK and the frame sequence number in the existing improved HDLC chip The problem

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] Such as figure 1A flow chart of Embodiment 1 of a method for sending HDLC data provided by the present invention is shown, the method is applied to the sending end, and the method is specifically implemented through the following steps:

[0057] Step S101: Pack the data to be sent to obtain a data packet according to the preset packet grouping rules;

[0058] Wherein, the sending end is preset with a grouping rule, according to the grouping rule, the d...

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Abstract

The invention provides an HDLC resending method. The HDLC resending method is applied to a sending terminal. According to the HDLC resending method provided by the invention, when the sending terminal is used for sending a data packet, an added header contains a packet sending sequence and a packet sending type and is used for sending the data packet by virtue of HDLC; when receiving a resending command, the sending terminal directly acquires a data packet to be resent according to the resending command and resends the data packet without judging whether the resending is needed or not, and thus occupied time of the resending process to the sending terminal is shortened, and the speed of sending data by the sending terminal is not influenced. In addition, with the adoption of the HDLC resending method, the packet sending sequence and the packet sending type are added in the data packet only without changing an HDLC chip, and thus the cost of the HDLC can not be increased.

Description

technical field [0001] The present invention relates to the field of information transmission, and more specifically relates to a method for sending advanced data link control data. Background technique [0002] HDLC (High-Level Data Link Control) is a bit-oriented data link layer protocol that transmits data on a synchronous network. It has high transmission efficiency and is currently widely used in the field of rail transit. . [0003] However, during the operation of the existing HDLC chip, there is a certain packet loss phenomenon in the HDLC data, resulting in unstable data transmission. Due to the high security and reliability required in the field of rail transit, an effective retransmission method is required to ensure the reliability of HDLC communication. [0004] In the prior art, the HDLC retransmission method is based on the internal frame counting function added by the improved HDLC chip, and the sending end (i.e., the improved HDLC chip) automatically adds ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
CPCH04L1/1607H04L69/22H04L69/324Y02D30/50
Inventor 杨卫峰粟爱军唐军王大君罗林蒋国涛邹智荣
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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