US 2017/0324515 A1Published application

Method for verifying the integrity of data transmission between a main upstream unit and a main downstream unit

AssigneeSafran Electronics & Defense

InventorsYann VANDENBAVIERE, Christophe TUZI, Olivier GALLAY, Sebastien LHENORET

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Abstract

The present invention relates to a method for verifying the integrity of data transmission between a main upstream unit (10a) and a main downstream unit (20a), the method being characterised in that it includes the implementation of the following steps: a data-processing module (11a) of the main upstream unit (10a) generates a first frame (T1) including a packet (P1) of data to be transmitted and a cyclic redundancy code (E1) of said packet (P1); encapsulating the first frame (T1) in a second frame (T2) which also includes a cyclic redundancy code (C1) of the first frame (T1); encapsulating the cyclic redundancy code (E1) of the packet (P1) in a third frame (T3); the data-processing module (11b) of the at least one auxiliary upstream unit (10b) compares each of the cyclic redundancy codes (E1) extracted from the first frame (T1) with those extracted from the third frame (T3); and confirming the integrity of data transmission to the main downstream unit (20a) only if the comparison is positive.

Method for verifying the integrity of data transmission between a main upstream unit and a main downstream unit, the method being characterized in that it comprises implementing the steps of:

(a) Generation, by a data processing module of the main upstream unit, of a first frame comprising a data packet to be transmitted and a cyclic redundancy code of said packet, and transmission to an interface module of the main upstream unit;
(b) Encapsulation, by said interface module of the main upstream unit, of the first frame in a second frame also including a cyclic redundancy code of the first frame;
(c) Transmission of the second frame to interface modules of the main downstream unit and of at least one auxiliary upstream unit;
(d) Extraction of the first frame from the second frame by the interface modules of the main downstream unit and of the at least one auxiliary upstream unit;
and transmission to data processing modules of the main downstream unit and of the at least one auxiliary upstream unit;
(e) Extraction of the packet from the first frame by the data processing module of the main downstream unit;
and extraction of the cyclic redundancy code of packet by the data processing module of the at least one auxiliary upstream unit;
(f) Encapsulation, by said interface module of the main upstream unit, of the cyclic redundancy code of packet in a third frame;
(g) Transmission of the third frame to the interface module of the at least one auxiliary upstream unit;
(h) Extraction of the cyclic redundancy code of packet from the third frame by the interface module of the at least one auxiliary upstream unit;
and transmission to the data processing module of the at least one auxiliary upstream unit;
(i) Comparison by the data processing module of the at least one auxiliary upstream unit of each of the cyclic redundancy codes extracted from the first frame and from the third frame;
and confirmation of the integrity of data transmission to the main downstream unit only if comparison is positive.

10 more elements

Facts

Application

15/529,420Filed 26 Nov 2015

Priority

FR 146156927 Nov 2014

Published

9 Nov 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 1/0061
Systems characterized by the type of code used: error detection codes
H04L 1/0041
By using forward error control: arrangements at the transmitter end
H04L 1/243
By comparing a transmitted test signal with a locally generated replica: at the transmitter, using a loop-back
H04L 12/40
Characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]: bus networks

Abstract

Claims13