Patent ID: 7487430
Filing Date: 2009-02-03
Classification: H04L

Abstract:
1. An apparatus for receiving control information transmitted from a transmitter using one of a plurality of slot lengths in a high-speed packet transmission mobile communication system, the apparatus comprising: a decoder for receiving symbols by the slot, and for generating at least one bit stream by decoding symbols from a current slot and zero or more preceding slots for at least one possible slot length among the plurality of slot lengths according to previous decoding results, wherein the previous decoding results comprises at least one slot length, symbols of which were previously decoded to generate at least one bit stream that passed an error check; an error checker for performing an error check on each of the at least one bit stream from the decoder; and a controller for providing symbols of at least one succeeding slot to the decoder if the error check on all of the at least one bit stream fails, and for acquiring control information from any of the at least one bit stream having an error check that passes; wherein the decoder further performs decoding the received symbols of the current slot if symbols of the current slot are received after an error checking passes through a previous decoding, decoding the symbols of the current slot and one preceding slot if symbols of two slots are received after an error checking passes through a previous decoding, and decoding symbols of the current slot and three preceding slots if symbols of four slots are received after an error checking passes through a previous decoding.