Patent attributes
The invention relates to arranging the transmission of packets between a mobile communication device and a mobile communication network. At least one temporary block flow is set up, and data is transmitted in packets in packet data traffic channels in a first direction from the mobile communication device to the mobile communication network. At the end of the transmission, information about the end of the block flow is set in the last packet, wherein the receiver of the packets acknowledges packet reception. After the end of the transmission of packets in said first direction, a determined time is waited until an acknowledgement is transmitted. If, while waiting, the mobile communication network detects a need for transmission of packets in the second direction from the mobile communication network to the mobile communication device, at least one packet data traffic channel is set up for data transmission in said second direction.