It should be noted that FIG. 3 merely illustrates various functional units in the RNC 300 in a logical sense. The functions in practice may be implemented using any suitable software and hardware means/circuits etc. Thus, the embodiments are generally not limited to the shown structures of the RNC 300 and the functional units. Hence, the previously described exemplary embodiments may be realised in many ways. For example, one embodiment includes a computer-readable medium having instructions stored thereon that are executable by the control or processing unit for executing the method steps in the network node 300. The instructions executable by the computing system and stored on the computer-readable medium perform the method steps of the network node 300 as set forth in the claims.

FIG. 4 schematically shows an embodiment of an arrangement in a RNC 400. Comprised in the arrangement in the RNC 400 are here a processing unit 406, e.g. with a DSP (Digital Signal Processor). The processing unit 406 may be a single unit or a plurality of units to perform different actions of procedures described herein. The arrangement in the RNC 400 may also comprise an input unit 402 for receiving signals from other entities, and an output unit 404 for providing signal(s) to other entities. The input unit and the output unit may be arranged as an integrated entity as illustrated in the example of FIG. 3 and the communication unit 301.