公开(公告)号：US20200313798A1

公开(公告)日：2020-10-01

申请号：US16312796

申请日：2017-06-29

Applicant: Kamstrup A/S

Inventor： Flemming Hald ,  Johnny Dørken Christiansen

IPC: H04L1/00 ,  H04L5/00 ,  H04W12/00 ,  H04W12/04

Abstract: Radio frequency communication method for wirelessly transmitting data packets between two communication nodes of a communication network, the method comprising the steps of generating a data packet including payload data and a first data check value a, transmitting the data packet from the first node to a second node; and determine whether the data packet is transmitted correctly by calculating a second data check value based on the received payload data and comparing the second data check value to the first data check value to; if the data packet is received correctly, transmitting from the second node to the first node an acknowledgement packet including a first acknowledgement check value wherein the first acknowledgement check value provides stronger assurances about data integrity of the received payload data than the first and second data check values; and at the first node, calculating a second acknowledgement check value based on the original payload data, and determining whether the data received at the second node matched the data originally sent from the first node.

公开(公告)号：US20190387405A1

公开(公告)日：2019-12-19

申请号：US16484839

申请日：2018-02-09

Applicant: Kamstrup A/S

Inventor： Johnny Dørken Christiansen ,  Flemming Hald

IPC: H04W12/10 ,  H04L29/06 ,  H04W4/38 ,  G01D4/00

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.

公开(公告)号：US20190342639A1

公开(公告)日：2019-11-07

申请号：US16474623

申请日：2017-12-22

Applicant: Kamstrup A/S

Inventor： Johnny Dørken Christiansen ,  Flemming Hald

IPC: H04Q9/00

Abstract: A consumption meter (M1) arranged to determine a consumed quantity of a utility at the consumer site. The meter (M1) has a communication unit with a transmitter and a receiver arranged for communication via a network, preferably an RF network. The meter can autonomously transmit data frames (DF) in accordance with a set of transmission parameters, e.g. data frames with data indicative of a consumed quantity. The meter can receive, within a limited time window (TW) following transmission of said data frame (DF), an acknowledgement frame comprising link data indicative of receipt of said data frame by an associated collector which has received the data frame (DF). Finally, the meter can adjust the set of transmission parameters for transmission of a subsequent data frame (DF) in response to said link data.

公开(公告)号：US09648400B2

公开(公告)日：2017-05-09

申请号：US14398286

申请日：2013-05-06

Applicant: Kamstrup A/S

Inventor： Flemming Hald ,  Johnny Dørken Christiansen

IPC: G08B23/00 ,  G08C15/06 ,  G08C19/06 ,  G08C19/04 ,  G08C19/10 ,  H04Q9/14 ,  H04Q9/00 ,  G06F9/445

CPC classification number: H04Q9/14 ,  G06F8/65 ,  H04Q9/00 ,  H04Q2209/10 ,  H04Q2209/60

Abstract: The invention relates to a system of consumption meters (2) arranged in a communication network, where program data of the consumption meters can be updated via the communication network. A data collector (3) is arranged for updating the program data of a group of consumption meters over the network. This is performed by establishing a dedicated update session to each consumption meter of the group of consumption meters, and transmitting addressed update program segments to consumption meters in session. During the update session with a given consumption meter, any other consumption meter which is within communication range (8) will, if it receives the update segment, store it even though the segment is addressed to another meter. In an update session of a next meter, only segments not already stored from a previous session to another consumption meter are transmitted to the next meter.