Method for improving the transmission quality between a data collector and a plurality of autonomous measuring units, and communication system

A communication system with two-way radio transmission, comprising:

• a data collector;
• a first communication module assigned to said data collector;
• metering units;
• at least two second communication modules, wherein one of said second
• communication modules is assigned in each case to one of said metering units, said second communication modules provided to transmit data by means of radio signals, in a form of radio messages having at least one data packet to said first communication module;
• said first communication module is provided to receive the data from said second communication modules;
• said first communication module has a first frequency reference device;
• each of said second communication modules having a second frequency reference device, wherein the radio signals transmitted in each case during a data transmission from said second communication modules to said first communication module are dependent on said second frequency reference device;
• a device provided to correct the data on a basis of a deviation between said first frequency reference device and said second frequency reference device;
• said first communication module having a measuring device to measure at least one parameter of a radio signal transmitted by a respective one of said second communication modules and received by said first communication module, the parameter selected from the group consisting of:
• bandwidth,
• data rate,
• data rate offset,
• temperature from the data packet,
• a frequency deviation derived from said second frequency reference device,
• a modulation index;
• and
• a receive time;
• and
• said first communication module having a control and processing unit, said control and processing unit determining, through estimation, an error of said second frequency reference device on a basis of parameter measured values or values derived from the parameter measured values;
• wherein the error of said second frequency reference device or a parameter error dependent thereon is reduced or eliminated by performing an adjustment of a frequency of said first frequency reference device and at least one parameter in said first communication module selected from the group consisting of a data rate, a data rate offset, and a modulation index.

A method for improving a transmission quality between a data collector and a plurality of metering units in a communication system, which comprises the steps of:

• assigning a first communication module to the data collector;
• providing at least two second communication modules, one of said second communication modules assigned in each case to a metering unit, the second communication modules are provided to transmit data by means of radio signals in a form of radio messages having at least one data packet to the first communication module;
• receiving, via the first communication module, the data from the second communication modules, the first communication module having a first frequency reference device and each of the second communication modules having a second frequency reference device, wherein the radio signals transmitted in each case during a data transmission from the second communication modules to the first communication module are dependent on the second frequency reference device;
• measuring at least one parameter of a radio signal transmitted by a respective one of the second communication modules and received by the first communication module, the parameter selected from the group consisting of a bandwidth, a data rate, a data rate offset, a temperature from a data packet, a frequency deviation derived from the second frequency reference device, a modulation index and a receive time;
• deriving, via the first communication module, an estimation of an error of the second frequency reference device on a basis of parameter measured values or values derived from the parameter measured values;
• and
• performing, via the first communication module, an adjustment of radio carrier frequencies derived from at least one parameter in the first communication module selected from the group consisting of a data rate, a data rate offset, and a modulation index in such a way that the error of the second frequency reference device or a parameter error dependent thereon is reduced or eliminated.

A communication system with two-way radio transmission, comprising:

• a data collector;
• a first communication module assigned to said data collector;
• metering units;
• at least two second communication modules, wherein one of said second
• communication modules is assigned in each case to one of said metering units, said second communication modules provided to transmit data by means of radio signals, in a form of radio messages having at least one data packet to said first communication module;
• said first communication module is provided to receive the data from said second communication modules;
• said first communication module has a first frequency reference device;
• each of said second communication modules having a second frequency reference device, wherein the radio signals transmitted in each case during a data transmission from said second communication modules to said first communication module are dependent on said second frequency reference device;
• a device provided to correct the data on a basis of a deviation between said first frequency reference device and said second frequency reference device;
• said first communication module having a measuring device to measure at least one parameter of a radio signal transmitted by a respective one of said second communication modules and received by said first communication module, the parameter selected from the group consisting of:
• bandwidth,
• data rate,
• data rate offset,
• temperature from the data packet,
• a frequency deviation derived from said second frequency reference device,
• a modulation index;
• and
• a receive time;
• and
• said first communication module having a control and processing unit, said control and processing unit determining, through estimation, an error of said second frequency reference device on a basis of parameter measured values or values derived from the parameter measured values;
• wherein the error of said second frequency reference device or a parameter error dependent thereon is reduced or eliminated by performing an adjustment of a radio carrier frequency derived from at least one parameter in said first communication module selected from the group consisting of a data rate, a data rate offset, and a modulation index.