Hybrid encoding of data transmissions in a security system

Details Hybrid encoding of data transmissions in a security system Hybrid encoding of data transmissions in a security system

2009-01-23

2010-12-28

Patel, Nirav (Department: 2435)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S181000

Reexamination Certificate

active

07861083

ABSTRACT:
A security system in which wireless transmitting security devices use a hybrid or dual encoding methodology, wherein a first part of a data message is encoded in a return-to-zero (RZ) format and a second part of the data message is encoded in a non-return-to-zero (NRZ) format, thereby increasing error detection and correction. In a first aspect of the invention, status information is included in the first part of the message and redundant status information is included in the second part of the message. In a second aspect of the invention, message sequence information is included in the second part of the message to avoid processing of stale or out-of-sequence messages.

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