System and method for determining EPL message transmission retri

Details System and method for determining EPL message transmission retri System and method for determining EPL message transmission retri

1995-06-13

1997-12-02

Chin, Stephen

Pulse or digital communications

Transceivers

375227, 375285, 375296, 455 63, 455 673, 34082515, 371 34, 36447803, 36447813, 36447908, 235378, H04B 138

Patent

active

056944187

ABSTRACT:
A system and method which determines a number of electronic price label (EPL) data message transmission attempts to an EPL. A transmitter transmits a data message to the EPL. A receiver receives a return signal from the EPL. A storage system stores a status flag representing a first number of times the data message is transmitted by the transmitter to the EPL, the status flag being based upon an established signal to noise (S/N) ratio. A communication base station (CBS) determines a new S/N ratio from the return signal. A runtime analyzer program determines whether the new S/N ratio is below a range of S/N ratios that includes the established S/N ratio, and if it is, provides a new status flag representing a second number of transmission times greater than the first number of transmission times. The transmitter transmits a subsequent data message the second number of times.

REFERENCES:
patent: 4589111 (1986-05-01), Adachi
patent: 4817115 (1989-03-01), Campo et al.
patent: 5483676 (1996-01-01), Mahany et al.
Robert H. Deng et al., An Adaptive Coding Scheme with Code Combing for Mobile Radio Systems, IEEE Transactions on Vehicular Technology, vol. 42, No. 4, Nov. 1993, pp. 469-476.

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