Patent ID: 6865163
Filing Date: 2005-03-08
Classification: H04L

Abstract:
1. A data transmission method in a telecommunication system, the method comprising: splitting data to be transmitted into fixed-length payload units provided with payload numbers in order to distinguish the payload units from one another, inserting one or more payload units into an information field of each protocol frame of a link protocol provided with a retransmission mechanism, providing a header field of a protocol frame with payload numbering, which indicates the payload units contained in the information field of the protocol frame, transmitting the protocol frame from a transmitting end to a receiving end, acknowledging payload units which have been received appropriately, requesting transmission of new payload units or requesting retransmission of payload units which have not been received appropriately by means of said payload numbers, using data block numbering in said retransmission mechanism, changing the length of the protocol frame during a connection, and inserting the payload units to be retransmitted into one or several protocol frames with a new frame length, said payload units having been transmitted for the first time before the frame length was changed.