Uplink transmission apparatus and method for mobile communication system supporting uplink MIMO

摘要

A base station includes a transmit path circuitry to transmit an uplink grant to a subscriber station. The uplink grant indicating a first MCS value for a first codeword transmission and a second MCS value for a second codeword transmission. The base station also includes a receive path circuitry configured to receive a MIMO uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission. ACK/NACK information and RI information are repeated on both the first and second subsets of layers, and CQI is spatially multiplexed on either the first subset or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI is spatially multiplexed onto the subset of layers having a higher MCS value.

主权项

1. A base station, comprising:
a transmit path circuitry configured to transmit an uplink grant to a subscriber station; and a receive path circuitry configured to receive one or more multiple-input multiple-output (MIMO) uplink coded transport blocks from the subscriber station on a number NL of layers, wherein at least one of acknowledgement/negative acknowledgement (ACK/NACK) information and rank indication (RI) information is transmitted in the one or more MIMO uplink coded transport blocks using at least one of a vector sequence qkACK and a vector sequence qkRI, and wherein each of qkACK and qkRI comprises NLQm bits and includes one of a sequence qiACK . . . qi+Qm−1ACK of information and a sequence qiRI . . . qi+Qm−1RI of information repeated NL times, where Qm is a number of bits per symbol, qACK denotes a bit of coded ACK/NACK information, and qRI denotes a bit of coded RI information.