Patent ID: 6895057
Filing Date: 2005-05-17
Classification: H04L

Abstract:
1. A wireless communication system being capable of supporting link adaptation comprising: a transmitter for forming fixed length radio link control (RLC) blocks, for forming fixed length coded sub-blocks from the RLC blocks, for configuring the coded sub-blocks into transmission units being capable of supporting link adaptation at multiple code rates, for forming a downlink segment from the transmission units, for interleaving the downlink segment into an interleaved downlink segment, and for transmitting the interleaved downlink segment, wherein the transmitter comprises an adaptive rate transmitter for retransmitting at least one of the RLC blocks at a code rate which is different from the code rate used for an initial transmission of the at least one of the RLC blocks, wherein the adaptive rate transmitter retransmits only a first portion of a transmission unit that comprises the at least one RLC blocks and integer number of the coded sub-blocks, wherein the adaptive rate transmitter replaces a second portion of the transmission unit by an extended header information; and a receiver for receiving the downlink segment, for obtaining the transmission units from the downlink segment, and for decoding the RLC blocks from the transmission units.