Patent ID: 7123595

Claim:
A method for transferring packets between a wireless data transfer device and a mobile communication network, in which method for transferring packets between a wireless data transfer device and a mobile communication network there are formed temporary packet flows, in which data is transferred in one or more packet data traffic channels either in a first direction from the mobile communication network to the wireless data transfer device, or in a second direction from the wireless data transfer device to the mobile communication network, and in which method, when data transfer ends in a packet flow, a notification of the end of the data transfer is added to a packet to be transmitted, wherein when the transfer of packets in said first direction has ended, at least one enquiry message related to a temporary packet flow in the first direction is also sent from the mobile communication network to the wireless data transfer device using the temporary packet flow in the first direction to allow the wireless data transfer device to request establishment of a temporary packet flow in the second direction even when the wireless data transfer device has indicated the reception af all data blocks from the mobile communication network, and that if there are packets in the wireless data transfer device to be sent to the mobile communication network, a response message to said message is sent from the wireless data transfer device, to which in the response message the wireless data transfer device sets information about the need to send packets.