One embodiment of the present disclosure relates to a method for use in a terminal device. The method comprises: obtaining signal quality measurements of plural beams; and selecting at least one serving beam from the plural beams depending upon the obtained signal quality measurements and scheduling constraint information of the plural beams. The embodiments of the present disclosure also relates to relevant radio access node device. When selecting or reselecting a serving beam for a terminal device, the scheduling constrains applied on the beams/links can be taken into consideration, which may allow an mmW network operating the link-specific coordination to control the probability that a terminal device is served by a coordinated beam on constrained radio resources at a lower level as possible.