Method and apparatus for transmitting and receiving reference signals in wireless communication

A user equipment (UE) comprising:

• a transceiver configured to receive a measurement reference signal (MRS) resource set comprising a group of MRS resources from a base station, each MRS resource comprising a set of respective MRS antenna ports, wherein:
• if at least two MRS antenna ports belong to a same MRS resource, then the at least two MRS antenna ports are quasi co-located with respect to a first set of quasi co-located large scale channel parameters (QCL parameters);
• else if the at least two MRS antenna ports belong to a same MRS resource set, then the at least two MRS antenna ports are quasi co-located with respect to a second set of QCL parameters;
• and
• else the at least two MRS antenna ports are not quasi co-located with respect to either the first set or the second set of QCL parameters unless indicated otherwise;
• and
• a controller configured to be configured with the measurement reference signal (MRS) resource set,
• wherein an MRS is a channel state information reference signal (CSI-RS) for estimating a CSI and at least one of the first set of QCL parameters and the second set of QCL parameters.

A method for operating a base station, the method comprising:

• configuring a measurement reference signal (MRS) resource set comprising a group of MRS resources, each MRS resource comprising a set of respective MRS antenna ports, wherein:
• if at least two MRS antenna ports belong to a same MRS resource, then the at least two MRS antenna ports are quasi co-located with respect to a first set of quasi co-located large scale channel parameters (QCL parameters);
• else if the at least two MRS antenna ports belong to a same MRS resource set, then the at least two MRS antenna ports are quasi co-located with respect to a second set of QCL parameters;
• and
• else the at least two MRS antenna ports are not quasi co-located with respect to either the first set or the second set of QCL parameters unless indicated otherwise;
• and
• transmitting the MRS resource set to a user equipment,
• wherein an MRS is a channel state information reference signal (CSI-RS) for estimating a CSI and at least one of the first set of QCL parameters and the second set of QCL parameters.

A base station comprising:

• a transceiver configured to transmit Physical Uplink Shared Channel (PUSCH) transmission parameters to a user equipment (UE);
• and
• a controller configured to configure the PUSCH transmission parameters including a cyclic shift, a orthogonal cover code (OCC) and comb offset parameters O(λ)(0) and O(λ)(1), wherein for up-to eight UE multi user (MU) multi-input multi-output (MIMO) with one layer per UE, the comb offset parameters O(λ)(0) and O(λ)(1) are determined according to a following table:
• Cyclic Shift Field in
• uplink-related downlink control
• information (DCI) format
• [O(λ)(0) O(λ)(1)]
• 000
• [0 0]
• 001
• [0 0]
• 010
• [0 0]
• 011
• [1 1]
• 100
• [1 1]
• 101
• [1 1]
• 110
• [1 1]
• 111
• [0 0]

A user equipment (UE) comprising:

• a transceiver configured to receive Physical Uplink Shared Channel (PUSCH) transmission parameters;
• and
• a controller configured to generate a Demodulation reference signal (DMRS) sequence using uplink PUSCH transmission parameters, wherein the uplink PUSCH transmission parameters includes a cyclic shift, a orthogonal cover code (OCC) and comb offset parameters O(λ)(0) and O(λ)(1), wherein for up-to eight UE multi user (MU) multi-input multi-output with one layer per UE, the comb offset parameters O(λ)(0) and O(λ)(1) are determined according to a following table:
• Cyclic Shift Field in
• up-related downlink control
• information (DCI) format
• [O(λ)(0) O(λ)(1)]
• 000
• [0 0]
• 001
• [0 0]
• 010
• [0 0]
• 011
• [1 1]
• 100
• [1 1]
• 101
• [1 1]
• 110
• [1 1]
• 111
• [0 0]