Method and device for transmitting information with verification of unintentional and intentional transmission errors
First Claim
1. A method of transmitting information with verification of transmission errors, comprising the steps of:
- transmitting, through a radio sender, in a determined frame a useful information message associated with a determined number p of transmission error verification bits also transmitted in said determined frame,obtaining a seal from the useful information message using a determined sealing function through a seal calculation module, the seal forming a determined number p1 of said p transmission error verification bits where p1 is a number less than p, andcalculating a cyclic redundancy code from the useful information message formed using the p−
p1 remaining transmission error verification bits through a channel coder.
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Accused Products
Abstract
For the transmission of information with verification of transmission errors, a useful information message (M) is transmitted in a determined frame while being associated with a determined number p of transmission error verification bits (CRC,S) also transmitted in the frame. In order to have an element allowing the verification of intentional errors, determined number p1 of the transmission error verification bits form a seal (S) obtained from a determined sealing function, where p1 is a number less than p. Application to radiocommunications equipment requiring the verification of the integrity and the authentication of the messages transmitted.
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Citations
13 Claims
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1. A method of transmitting information with verification of transmission errors, comprising the steps of:
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transmitting, through a radio sender, in a determined frame a useful information message associated with a determined number p of transmission error verification bits also transmitted in said determined frame, obtaining a seal from the useful information message using a determined sealing function through a seal calculation module, the seal forming a determined number p1 of said p transmission error verification bits where p1 is a number less than p, and calculating a cyclic redundancy code from the useful information message formed using the p−
p1 remaining transmission error verification bits through a channel coder. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for transmitting information with verification of transmission errors, comprising:
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means for transmitting in a determined frame a useful information message associated with a determined number p of transmission error verification bits also transmitted in said determined frame, and means for obtaining a seal from the useful information message using a determined sealing function, which seal forms a determined number p1 of said p transmission error verification bits, where p1 is a number less than p, the p−
p1 remaining bits forming a cyclic redundancy code calculated from the useful information message. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification