Patent ID: 7284179
Filing Date: 2007-10-16
Classification: H04L,H04W

Abstract:
1. A window based method to avoid the stall of data blocks during in-sequence delivery using reordering buffers at the receiver in a High Speed Downlink Packet Access (HSDPA) of a wireless communication system, wherein the transmitter assigns a Transmission Sequence Number (TSN) to each data block, the method comprising the steps of: at the transmitter: calculating the transmission window size (WINDOW) based on the receiver's capacity and a plurality of configured system parameters; synchronizing the value of WINDOW with the receiver; initializing the transmission window with the transmission window lower edge (TWLE) set to a first constant, c sending a data block only if its TSN is within the range of die transmission window; receiving an acknowledgement for a sent data block from the receiver; updating the boundaries of the transmission window if the TSN of the acknowledged data block is equal to the current transmission window lower edge; and updating the boundaries of the transmission window if a data block is discarded from the retransmission buffer.