Diehl Metering Systems Gmbh

Benjamin Meyer

Thomas Kauppert

Hristo Petkov

Klaus Gottschalk

Christoph Schmidt

Simon Schroeter

Christian Jambor

Michael Traenkler

Michael Tränkler

A method improves antenna matching for a node, in particular a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of radio communication and has a radio module equipped with an antenna and a transmit path and/or receive path for radio signals to be emitted and/or received. The node has a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The antenna has an impedance and in the receive situation and/or in the transmit situation in the case of adjustable matchings, preferably by use of adjustable matching networks, the signal to noise ratio associated with each matching is estimated, and a matching is selected from the different matchings for the receive mode and/or the transmit mode.

Method for improving antenna matching and node

A method detects the surroundings of a node, in particular in the form of a sensor apparatus and/or actuator apparatus, of a communications network. The node is capable of unidirectional or bidirectional radio communication and has a radio module equipped with an antenna, a transmit path and/or receive path, and a power supply apparatus, which is preferably energy self-sufficient, in particular a battery. The surroundings are detected, preferably at repeated time intervals, on the basis of an estimate of the detuning of the antenna of the radio module.

Method for detecting the surroundings of a node capable of unidirectional or bidirectional radio communication and node

A method synchronizes frame counters for protecting data transmissions between a first end-device and a second end-device. The data, in particular data frames, are transferred between the first end-device and the second end-device. The data frames are provided with frame counters to protect the data transfer between the first end-device and the second end-device. The second end-device sends a first data frame to the first end-device. The first data frame contains a marker in its payload data. The first end-device sends back a second data frame as an answer to the second end-device. The second data frame contains a frame counter in the header data, and the second data frame contains the frame counter and the marker in its payload data.

Method for synchronizing frame counters and arrangement

A method operates a supply system having a measuring unit and a central unit. Information is transferred repeatedly at specific time intervals via a communication network by radio between the central unit and the measuring unit. The measuring unit or the central unit receives the information and then generates a receipt confirmation, which it transmits to the central unit or the measuring unit respectively. The central unit or the measuring unit, after transmitting the information, opens a receive window of a certain time length for receiving the receipt confirmation. As a result of a first trigger event, the time intervals between the repeat transmissions of the information are shortened, and/or an additional receive window for receiving the receipt confirmation is opened, and as a result of a second trigger event, the time intervals between the repeat transmissions are lengthened, and/or no additional receive windows are opened.

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Nuremberg, Germany

Benjamin Meyer