Patent ID: 6771659
Filing Date: 2004-08-03
Classification: H04L,H04W

Abstract:
Method for use in a telecommunications system (GPRS) having the capability to exchange information packets over a communications link (Um) in both an acknowledge mode, in which reception by a receiver (BSS) of all information packets transmitted by a transmitter (MS) over the communications link (Um) are acknowledged by the receiver (BSS) sending at least one acknowledgement over the communications link (Um) back to the transmitter (MS), and in an unacknowledge mode in which none of the information packets transmitted by the transmitter (MS) over the communications link (Um) are acknowledged by the receiver (BSS), characterized by:said transmitter (MS) in said unacknowledge mode nevertheless determining from among a plurality of packets destined for transmission to the receiver (BSS) in said unacknowledge mode a selected packet (PDU) for which an acknowledgement of receipt from the receiver (BSS) is required, and signaling said receiver (BSS) that said acknowledgement of receipt of said selected packet (PDU) is required from the receiver (BSS), wherein the selected packet (PDU) is selected if incorrect reception of the selected packet (PDU) would cause other packet data to be lost or if the selected packet (PDU) is more important than others, the selected packet (PDU) being a reference packet that serves as a basis for further transmissions which indicate changes as compared to the reference packet.