The present invention relates to method for wireless communicating in a network comprising a resource-constrained end device, and a first router device, wherein the method comprises the following steps:—the end device (ZBLD) sending a trigger for proxy search procedure,—the first router (R1) device receiving the trigger for proxy search procedure, the first router (R1) determining whether it fulfills conditions for acting as a router for the end device, and in case conditions are fulfilled, the first router appointing itself as a proxy router for the end device, for relaying communication between the end device and the rest of the network. The invention also relates to an end device, a router device, and net work therefor.