Means to differentiate between commands and data on a communicat

Details Means to differentiate between commands and data on a communicat Means to differentiate between commands and data on a communicat

1992-04-15

1993-10-12

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

370111, H04B 2549

Patent

active

052532747

ABSTRACT:
A method of transmitting data and commands on a communication link so as to efficiently distinguish between commands and data. This invention encodes information symbols before transmission on the communication link. A unique code symbol S which does not equal any encoded information symbol is defined along with a unique encoded command symbol ESOTX. Encoded data information symbols are transmitted by sending S followed by ESOTX, and then the encoded data information symbols. Encoded command information symbols, not including ESOTX, are transmitted by sending S immediately followed by the encoded command information symbols. The receiver interprets any encoded information symbol immediately following S as a command. If the encoded command equals ESOTX, the following symbols are treated as data until S is received again. If the encoded command is not ESOTX, the following symbols are treated as commands until S is received again.

REFERENCES:
patent: 4689790 (1987-08-01), Lacroix et al.
patent: 4805194 (1989-02-01), Weslowski
patent: 4926448 (1990-05-01), Kraul et al.

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