Multiplexing control and data information from a user equipment in mimo transmission mode

A method for determining the number of coded control information symbols in each spatial layer, in a communication system wherein a User Equipment (UE) is assigned by a base station transmission of a first Physical Uplink Shared CHannel (PUSCH) from multiple transmitter antennas to convey data information in multiple spatial layers and in two Codewords (CWs), CW0 and CW1, with each CW conveying a corresponding Transport Block (TB), TB0 and TB1, of data information, and the UE is assigned by the base station transmission of a second PUSCH from a single or from multiple transmitter antennas to convey data information in a single spatial layer or in multiple spatial layers for a retransmission of either TB0 or TB1 for a respective Hybrid Automatic Repeat reQuest (HARQ) process, and the UE multiplexes control information of O bits with data information in the second PUSCH, the method comprising the steps of:

• applying a first parameter value βoffset, CW0PUSCH for the determination of the number of coded control information symbols if the retransmission is for the first TB from the two TBs;
• and
• applying a second parameter value βoffset, CW1PUSCH for the determination of the number of coded control information symbols if the retransmission is for the second TB from the two TBs,
• wherein the first parameter value βoffset, CW0PUSCH and the second parameter value βoffset, CW1PUSCH are assigned to the UE by the base station using radio resource control signaling.

A User Equipment (UE) apparatus for transmitting control information, the UE apparatus being assigned by a base station transmission of a Physical Uplink Shared CHannel (PUSCH) from multiple transmitter antennas over a number of sub-carriers MscPUSCH in the frequency domain and over a number of symbols in the time domain, the PUSCH being transmitted over multiple spatial layers in two Codewords (CWs), CW0 and CW1 with each CW conveying a corresponding Transport Block (TB) of data information, TB0 and TB1, the transmission of each TB being associated with a respective Hybrid Automatic Repeat reQuest (HARQ) process, wherein CW0 has a first Modulation and Coding Scheme (MCS), MCS0, and CW1 has a second MCS, MCS1, and wherein the UE multiplexes control information of O bits with data information in all spatial layers, the apparatus comprising:

• an averaging unit for computing the average MCS from the first MCS and the second MCS for the initial PUSCH transmissions of the same TBs for the HARQ process;
• a multiplier for determining the number of coded control information symbols Q′ in each spatial layer to be proportional to the product of the number of control information bits O and a parameter βoffsetPUSCH assigned to the UE apparatus by the base station through radio resource control signaling and to be inversely proportional to the average MCS;
• a multiplexer for multiplexing the control information with the data information over multiple spatial layers;
• and
• a transmitter for transmitting the control information and the data information in the PUSCH.

A User Equipment (UE) apparatus for transmitting control information, the UE apparatus being assigned by a base station transmission of a first Physical Uplink Shared CHannel (PUSCH) from multiple transmitter antennas to convey data information in multiple spatial layers and in two Codewords (CWs), CW0 and CW1, with each CW conveying a corresponding Transport Block (TB), TB0 and TB1, of data information, the UE is assigned by the base station transmission of a second PUSCH from a single or from multiple transmitter antennas to convey data information in a single spatial layer or in multiple spatial layers for a retransmission of either TB0 or TB1 for a respective Hybrid Automatic Repeat reQuest (HARQ) process, and the UE apparatus multiplexes control information of O bits with data information in the second PUSCH, the apparatus comprising:

• a selector for selecting a first parameter value βoffset, CW0PUSCH if the retransmission is for TB0 and for selecting second parameter value βoffset, CW1PUSCH if the retransmission is for TB1, wherein the selected parameter value is used for the determination of the number of coded control information symbols Q′ in each spatial layer and βoffset, CW0PUSCH and βoffset, CW1PUSCH are provided by the base station through radio resource control signaling;
• a multiplexer for multiplexing the control information with the data information over each spatial layer in the second PUSCH;
• and
• a transmitter for transmitting the control information and the data information in the second PUSCH.