Communications: electrical – Continuously variable indicating – With meter reading
Patent
1984-09-14
1987-02-24
Caldwell, Sr., John W.
Communications: electrical
Continuously variable indicating
With meter reading
34082544, 340502, 340505, G08B 522, G08B 2300, G08B 2600, H04Q 700
Patent
active
046460829
ABSTRACT:
In a data message communication system, certain messages require a return acknowledgement signal. The present invention contemplates a method and means which are activated whenever an outbound message is received. Each portable unit which receives a message then monitors the outbound communication channel to determine if the inhibit signal is currently active. If the inhibit is not currently active, the particular unit will transmit its acknowledgement message immediately. If the inhibit signal is active, each portable unit will maintain a count of the number of outbound messages, addressed to other units requiring an acknowledgement, since that particular portable received its message. At the termination of the inhibit signal, each portable unit will pause for a period equivalent to the product of the acknowledgement message time slot multiplied by count of messages accumulated since the receipt of the particular portable units message. Each portable unit will then transmit an acknowledgement signal at the termination of its unique pause period.
REFERENCES:
patent: 4199661 (1980-04-01), White et al.
patent: 4232294 (1980-11-01), Burke et al.
patent: 4342995 (1982-08-01), Shima
patent: 4445214 (1984-04-01), Reynolds et al.
patent: 4517561 (1985-05-01), Burke et al.
patent: 4517669 (1985-05-01), Freeburg et al.
patent: 4519068 (1985-05-01), Krebs et al.
Engel James R.
Glidewell Keith J.
Stepien Michael A.
Caldwell Sr. John W.
Downey Joseph T.
Motorola Inc.
Olson David W.
Sarli Anthony B.
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