Indication Information Transmission Method and Apparatus

A terminal device, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions to:
• receive indication information transmitted by a network device, wherein the indication information indicates a first signature sequence and a first modulation constellation for transmitting a first downlink data stream by the network device, wherein the indication information indicates one or more second signature sequences and one or more second modulation constellations for transmitting a second downlink data stream by the network device, wherein the second downlink data stream is one or more downlink data streams, other than the first downlink data stream, that are carried on a time-frequency resource used by the first downlink data stream, and wherein the first signature sequence and the one or more second signature sequences are multi-dimensional complex-number vectors comprising at least one zero element and at least one non-zero element;
• determine the first signature sequence, the first modulation constellation, the one or more second signature sequences, and the one or more second modulation constellations according to the indication information;
• and
• decode, according to the first signature sequence, the first modulation constellation, the one or more second signature sequences, and the one or more second modulation constellations.

A method comprising:

• determining, by a network device, a first signature sequence and a first modulation constellation for transmitting a first downlink data stream to a terminal device,
• performing amplitude and phase adjustment, using the first signature sequence, on a modulation symbol obtained after performing constellation mapping on a downlink data stream using a modulation constellation;
• determining one or more second signature sequences and one or more second modulation constellations for transmitting a second downlink data stream, wherein the second downlink data stream is one or more downlink data streams other than the first downlink data stream, that are carried on a time-frequency resource used by the first downlink data stream, wherein the first signature sequence and the one or more second signature sequence are multi-dimensional complex-number vectors comprising at least one zero element and at least one non-zero element;
• determining indication information indicating the first signature sequence, the first modulation constellation, the one or more second signature sequences, and the one or more second modulation constellations;
• and
• transmitting, by the network device to the terminal device, the indication information.