Ofdma-based multiplexing of uplink control information

An apparatus comprising:

• at least one processor configured to cause a UE (user equipment) to:
• decode downlink control information (DCI) scheduling an uplink shared channel (UL-SCH) data transmission;
• multiplex uplink control information (UCI) with the UL-SCH data for transmission over orthogonal frequency division multiplexing (OFDM) symbols in the time domain and in one or more physical resource blocks (PRBs) in the frequency domain, wherein the OFDM symbols and the one or more PRBs include a plurality of time-frequency resource elements (REs);
• map demodulation reference signals (DMRS) to REs in a set of OFDM symbols of the transmission, wherein the set of OFDM symbols is determined according to the DCI;
• map UCI to REs of the OFDM symbols, wherein the mapping of UCI dynamically adapts to the position of the DMRS REs as determined according to the DCI, wherein said mapping includes mapping the UCI to REs first in the frequency domain and then in the time domain;
• and
• map UL-SCH data to REs of the one or more PRBs first in the frequency domain and then in the time domain after mapping the UCI.

A wireless device, comprising:

• wireless communication circuitry;
• and
• at least one processor coupled to the wireless communication circuitry and configured to:
• decode downlink control information (DCI) scheduling an uplink shared channel (UL-SCH) data transmission;
• multiplex uplink control information (UCI) with the UL-SCH data for transmission over orthogonal frequency division multiplexing (OFDM) symbols in the time domain and in one or more physical resource blocks (PRBs) in the frequency domain, wherein the OFDM symbols and the one or more PRBs include a plurality of time-frequency resource elements (REs);
• map demodulation reference signals (DMRS) to REs in a set of OFDM symbols of the transmission, wherein the set of OFDM symbols is determined according to the DCI;
• map UCI to REs of the OFDM symbols, wherein said mapping of UCI dynamically adapts to the position of the DMRS REs as determined according to the DCI, wherein said mapping includes mapping the UCI to REs first in the frequency domain and then in the time domain;
• and
• map UL-SCH data to REs of the one or more PRBs first in the frequency domain and then in the time domain after mapping the UCI.

A method of operating a base station comprising:

• encoding, for transmission to a user equipment (UE), downlink control information (DCI) scheduling an uplink shared channel (UL-SCH) data transmission;
• extracting, in response to the DCI, uplink control information (UCI) multiplexed with the UL-SCH data from orthogonal frequency division multiplexing (OFDM) symbols in the time domain and in one or more physical resource blocks (PRBs) in the frequency domain, wherein the OFDM symbols and the one or more PRBs include a plurality of time-frequency resource elements (REs);
• wherein the transmission includes:
• demodulation reference signals (DMRS) mapped to REs in a set of OFDM symbols of the transmission, wherein the set of OFDM symbols is based on the DCI;
• UCI mapped to REs of the OFDM symbols, wherein said mapping of UCI dynamically adapts to the position of the DMRS REs as determined according to the DCI;
• wherein the mapping includes UCI mapped to REs first in the frequency domain and then in the time domain;
• and
• UL-SCH data mapped to REs of the one or more PRBs first in the frequency domain and then in the time domain after mapping the UCI.