Radio frequency communication system and method
AssigneeKamstrup A/S
InventorsJohnny Dørken Christiansen, Flemming Hald
Life of this patent
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Abstract
Method and devices for wirelessly transmitting data packets in a meter reading system, wherein the method comprises generating at the meter device, a first data packet including payload data and a first message authentication code computed based the payload data and associated meter data stored in a memory of the meter device, transmitting the first data packet from the meter device to the receiver, and performing a primary authentication check of the first data packet and verifying the associated meter data at the receiver by recalculating the first message authentication code using the received payload data and current associated meter data stored in a memory of the receiver, as input.
Claims8
A method for wirelessly transmitting data packets from a meter device to a receiver of a meter reading system, the method comprising the steps of:
- generating at the meter device, a first data packet including consumption data as payload data and a first message authentication code computed based on a message authentication code algorithm using as input the payload data, associated meter data, and a data encryption key stored in a memory of the meter device;
- wherein the associated meter data is data reflecting one or more configuration parameters of the meter device;
- transmitting the first data packet from the meter device to the receiver;
- at the receiver, performing a primary authentication check of the received first data packet and verifying current associated meter data stored in a memory of the receiver by recalculating the first message authentication code based on the message authentication code algorithm with the received payload data, the current associated meter data, and the data encryption key stored in a memory of the receiver, as input;
- and
- accepting the first data packet if it is verified as authentic.
Dependencies are inferred from the claim text.