Non-orthogonal multiple access (NOMA) using rate based receivers

A method performed by a network node, wherein the network node serves a first user equipment, (UE) and a second UE using Non-Orthogonal multiple access (NOMA), the method comprising:

• obtaining a first rate demand for the first UE;
• obtaining a second rate demand for the second UE;
• receiving one or more pilot signals from the first UE and the second UE;
• using the received pilot signals, determining a first channel gain for the first UE;
• determining a second channel gain for the second UE;
• and
• using the first rate demand, the second rate demand, the first channel gain, and the second channel gain to determine a decoding scheme for decoding a message transmitted by one of the first UE and a transmission point of the network node, wherein determining the decoding scheme comprises:
• selecting a data point from the set of data points, wherein selected data point identifies a maximum achievable rate for the first UE that is equal to the rate demand for the first UE;
• and
• determining whether the maximum achievable rate for the second UE identified by the selected data point is greater than or equal to the rate demand for the second UE,
• wherein the decoding scheme comprises using a successive interference cancellation (SIC) receiver by the first UE and a conventional OMA based receiver by the second UE to decode the message.

A network node serving a first user equipment (UE) and a second UE using Non-Orthogonal multiple access (NOMA), comprising:

• a processor;
• and
• a memory storing instructions that, when executed by the processor, cause the network node to:
• for a decoding scheme, obtain a first set of data points, each data point included in the first set of data points identifying a maximum achievable rate for the first UE and a maximum achievable rate for the second UE;
• obtain a first rate demand for the first UE;
• obtain a second rate demand for the second UE;
• and
• use the first set of data points, the first rate demand, and the second rate demand to determine the decoding scheme for decoding a message transmitted by one of the first UE and a transmission point of the network node,
• wherein in determining the decoding scheme, the network node is further adapted to:
• select a data point from the set of data points, wherein selected data point identifies a maximum achievable rate for the first UE that is equal to the rate demand for the first UE;
• and
• determine whether the maximum achievable rate for the second UE identified by the selected data point is greater than or equal to the rate demand for the second UE, wherein the decoding scheme comprises using a successive interference cancellation (SIC) receiver to decode the message.

A network node serving a first user equipment (UE) and a second UE using Non-Orthogonal multiple access (NOMA), comprising:

• a processor;
• and
• a memory storing instructions that, when executed by the processor, cause the network node to:
• obtain a first rate demand for the first UE;
• obtain a second rate demand for the second UE;
• receive one or more pilot signals from the first UE and the second UE;
• using the received pilot signals, determine a first channel gain for the first UE;
• determine a second channel gain for the second UE;
• and
• use the first rate demand, the second rate demand, the first channel gain, and the second channel gain to determine the decoding scheme for decoding a message transmitted by one of the first UE and a transmission point of the network node, wherein determining the decoding scheme comprises:
• selecting a data point from the set of data points, wherein selected data point identifies a maximum achievable rate for the first UE that is equal to the rate demand for the first UE;
• and
• determining whether the maximum achievable rate for the second UE identified by the selected data point is greater than or equal to the rate demand for the second UE, wherein the decoding scheme comprises using a successive interference cancellation (SIC) receiver by the first UE and a conventional OMA based receiver by the second UE to decode the message.