A method for link management for wireless communication between - a measuring device , and - a data collection unit for collecting data from the measuring device , wherein the method comprises: - sending data in a primary uplink data frame from the measuring device to the data collection unit via a primary channel, - providing by the measuring device , after sending the primary uplink data frame, a time-limited primary access opportunity, AO, for receiving a link management downlink frame from the data collection unit , - evaluating , by the data collection unit , a primary signal quality upon receiving the primary uplink data frame via the primary channel, - sending one or more secondary uplink frames from the measuring device to the data collection unit via one or more secondary channels, - providing by the measuring device , after sending of at least some of the secondary uplink data frames, a time-limited secondary access opportunity, AO, for receiving a link management downlink frame from the data collection unit , - evaluating , by the data collection unit , one or more secondary signal qualities upon receiving the one or more secondary uplink data frames via the one or more secondary channels, - selecting, by the data collection unit , one among the primary access opportunity, AO, and the one or more secondary access opportunities, AO, for sending a link management downlink frame from the data collection unit to the measuring device depending on the evaluation of the primary signal quality and the one or more secondary signal qualities, and - using , by the measuring device , after receiving said link management downlink frame during the selected access opportunity from the data collection unit , the channel that is associated with the selected access opportunity, AO, as the primary channel for sending data in a primary uplink data frame from the measuring device to the data collection unit . - a measuring device , and - a data collection unit for collecting data from the measuring device , - sending data in a primary uplink data frame from the measuring device to the data collection unit via a primary channel, - providing by the measuring device , after sending the primary uplink data frame, a time-limited primary access opportunity, AO, for receiving a link management downlink frame from the data collection unit , - evaluating , by the data collection unit , a primary signal quality upon receiving the primary uplink data frame via the primary channel, - sending one or more secondary uplink frames from the measuring device to the data collection unit via one or more secondary channels, - providing by the measuring device , after sending of at least some of the secondary uplink data frames, a time-limited secondary access opportunity, AO, for receiving a link management downlink frame from the data collection unit , - evaluating , by the data collection unit , one or more secondary signal qualities upon receiving the one or more secondary uplink data frames via the one or more secondary channels, - selecting, by the data collection unit , one among the primary access opportunity, AO, and the one or more secondary access opportunities, AO, for sending a link management downlink frame from the data collection unit to the measuring device depending on the evaluation of the primary signal quality and the one or more secondary signal qualities, and - using , by the measuring device , after receiving said link management downlink frame during the selected access opportunity from the data collection unit , the channel that is associated with the selected access opportunity, AO, as the primary channel for sending data in a primary uplink data frame from the measuring device to the data collection unit . <EOS>