Patent ID: 6901046
Filing Date: 2005-05-31
Classification: H04L,H04W

Abstract:
1. A process for controlling selection of a modulation and coding selection method to be used by a base transceiver station to transmit data packets comprising first data packets transmitted on a forward shared channel which have been received by a mobile station and second data packets to be transmitted to the mobile station on the forward shared channel which follow the first data packets to the mobile station comprising: storing information at the base transceiver station, the information containing modulation and coding methods which may be selected to transmit the second data packets over the forward shared channel to the mobile station; receiving feedback from the mobile station at the base transceiver station based upon the transmission of the first data packets of a quality indication of transmission of the first data packets over the forward channel to the mobile station; and selecting a modulation and coding method from a plurality of modulation and coding methods to be used to transmit the second data packets on the forward channel dependent upon the received quality indication of the feedback of the first data packets; and wherein the quality indication is processed at the base transceiver station to choose from a plurality of groups of selectable modulation and coding methods a modulation and coding method to be used to transmit the second data packets from one of the groups with the modulation and coding method selected from each group optimizing a different characteristic of the transmission of the second data packets, the information correlates modulation and coding methods with frame error rate and throughout determined by the mobile station; and the quality indication of transmission of data packets contains a trigger that either frame error rate information or the throughput information is to be used in selecting the modulation and coding selection method and an indication of pilot signal strength with the pilot signal strength being used in the selection of a modulation and coding selection method based upon either the designated frame error rate information or the designated throughout information.