A method for operating a low-mobility wireless device in a cellular network, wherein the low-mobility wireless device operates with an active base node, and the low-mobility wireless device operates in a first mode, in which measurements of transmissions of base nodes are diminished. When the cellular network is enhanced by a new base node, the active base node transmits a first indication at least to the low-mobility wireless device. The low-mobility wireless device, in response to the reception of the first indication, switches to a second mode of operation, comprising execution of at least one measurement of transmissions of base nodes, and transmits at least one measurement report to the then-active base node. The active base node, upon reception of a measurement report, updates neighbour relation data relating to the base node identified by a base node reference with information obtained from the received measurement report.