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Data communication system and method adapted based on CPA field protection

A field protection and communication method technology, applied in the field of data communication, can solve the problems of frequent disconnection and reconnection of ATT and underlying transmission, and achieve the effect of reducing power consumption

Active Publication Date: 2020-06-19
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a data communication method and system adapted based on CPA site protection, to solve the above-mentioned background technology. The problem with the impact of frequent disconnection and reconnection of the underlying transmission

Method used

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  • Data communication system and method adapted based on CPA field protection
  • Data communication system and method adapted based on CPA field protection
  • Data communication system and method adapted based on CPA field protection

Examples

Experimental program
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Embodiment 1

[0083] This embodiment: as figure 1 , 2 , 3, the data communication method adapted based on the site protection of CPA, the communication method includes before the data exchange between the master and slave devices, the communication parties respectively establish the bottom transport layer 1, the attribute protocol ATT from bottom to top Layer 2, general attribute specification protocol adaptation CPA layer 3, data exchange protocol PHD layer 4 and application layer 5 data communication protocol stack hierarchy;

[0084] The CPA layer 3 includes a CPA data exchange method, and the CPA data exchange method includes:

[0085] CPA connection sub-flow ST101: The CPA layer 3 of both communication parties enters the CPA operation sub-flow ST102 ST201 through the CPA site protection method of the first CPA connection sub-flow ST101 or the second CPA connection sub-flow ST101;

[0086] CPA operation sub-flow ST102: The communication parties obtain APDUs from the PHD layer 4 of the...

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Abstract

The invention belongs to the technical field of data communication, in particular to a CPA-based field protection adaptive data communication system and method. The method comprises a CPA connection sub-process, a CPA operation sub-process and a CPA disconnection sub-process. According to the invention, problems in the prior art that in a communication process of carrying out proposal adaptation based on ATT and a read-write instruction, the adaptability is poor are solved; how to avoid the influence of frequent disconnection and reconnection of ATT and bottom layer transmission is solved; themethod has the advantages that data transmission of the PHD layer is not affected by frequent disconnection and reconnection of ATT layer transmission, synchronous interaction of the application layer is supported, possible unreliable conditions of bottom layer transmission are shielded, and reliability of communication data in bottom layer transmission is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of data communication, and in particular relates to a data communication system and method adapted based on CPA site protection. Background technique [0002] The present invention is based on the "202010067516.3" communication method and system for protocol adaptation based on ATT and read and write instructions; [0003] The present invention is based on "201910784387.7", a communication method and system adapted through ATT and data segmentation and reorganization; [0004] In the data communication system, an adaptation layer, that is, the CPA layer, is constructed between the ATT layer and the PHD layer. The CPA layer constructed by the present invention adopts ATT as the communication protocol of the end-to-end device, and ATT is used for independent service access Provide data unit (PDU) transmission between points, the CPA layer can place the data unit (APDU) exchanged by the PHD layer in the corres...

Claims

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Application Information

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IPC IPC(8): H04L29/08
CPCH04L69/30H04L67/14H04L67/143
Inventor 钟代笛赵杰曹小英唐艺贺学兵段小炼韩术黄智勇仲元红印强
Owner CHONGQING UNIV
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