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1. (WO2018041392) METHOD FOR SELECTING FREQUENCY CHANNELS

Pub. No.:    WO/2018/041392    International Application No.:    PCT/EP2017/000983
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu Aug 17 01:59:59 CEST 2017
IPC: H04L 1/00
H04B 1/713
H04B 1/7143
H04L 1/20
H04B 1/715
Applicants: DIEHL METERING SYSTEMS GMBH
Inventors: PETKOV, Hristo
KAUPPERT, Thomas
Title: METHOD FOR SELECTING FREQUENCY CHANNELS
Abstract:
The invention relates to a method for selecting frequency channels (K1 - Kn) in a communication system using a frequency hopping method, in particular for detecting consumption of consumption measuring devices in which data is transferred between a transmitter and a receiver by means of radio transmission. The data is transferred in the form of data packets (4) comprising several bits in a frequency/time block, the transfer of the data packets (4) or parts of the data packets (4) taking place on several different selected frequency channels (K1 - Kn), the respective data packet (4) or a parts thereof being coded prior to sending from the transmitter and is decoded after receiving it from the received, the transmission quality of the frequency channels (K1 - Kn) is evaluated and using the evaluation of the transmission quality of the frequency channels (K1 - Kn), a decision is taken for the selection of the frequency channel (K1 - Kn) or frequency channels (K1 - Kn) which is/are used for transferring the data. A probability ratio (WQ) for the probability of a successful transfer is determined prior to decoding by the receiver, the probability ratio (WQ) is worked out as a metric for determining the disturbance state of the respective data packet (4) or one part thereof, and the evaluation of the transmission quality of the respective frequency channels (K1-Kn) takes place using the disturbance state of the data packet (4) or one part thereof.