Allocation of resources in packet-switched data transfer

The invention relates to the busbar packet transport between wireless data transmission device (MS) and mobile communication network method. For transmitting packet between wireless data transmission device (MS) and mobile communication network, forming a temporary block stream (UL TBF, DL TBF), and information transmitted one or more integrated data service channels flow passage (PDTCH) in the streams, or a mobile communication network to the wireless data transmission device (MS) first direction, or a wireless data transmission device (MS) mobile communication network second direction. The method, data transfer, said (302) is the information in packet in the block current flowing transmitting the related block the finished. When the packet transport of said first direction; at least searching message (306) is transmitted from mobile communication network to wireless data transmission device (MS). A in wireless data transmission device (MS) is packet substrate-processing of mobile communication network; and wireless data transmission device (MS) sends wherein the searching message (306) acknowledge message (307), and (307) is related transmitting packet in the acknowledge message as necessary information.