Patent ID: 9589462
Date: 2017-03-07
CPC Classifications: G08C,H04Q

Claim:
1. A one-directional wireless data collection system to provide highly assured data delivery to recover data recorded by a sensor of a tag during a network disruption, the system comprising: the tag, the tag comprising: a system controller to wirelessly receive the plurality of transmissions from the tag, the system controller coupled to a database of received measurements of the environmental characteristic, the system controller programmed to perform the steps of: extracting the present measurement and the plurality of previous measurements of the environmental characteristic from each respective transmission of the plurality of transmissions; adding the present measurement of the environmental characteristic to the database; detecting, in each respective transmission, any of the previous measurements of the plurality of previous measurements missing from the database by comparing said plurality of previous measurement of the environmental characteristic from the respective transmission with the received measurements of the environmental characteristic in the database; for said detected previous measurements, adding said detected previous measurements to the database, without request for retransmission of said detected previous measurements, wherein each transmission contains a different plurality of previous measurements compared to an immediately-preceding transmission, and wherein the plurality of previous measurements comprises a subset of the M previous measurements of the environmental characteristic, and the subset comprises measurements to be reported at a first rate that is N1 times slower than the first average repetition rate R.