Efficient downlink control information transmission in mobile communication networks

A data transmission method, comprising:

• receiving, by a terminal device, first downlink control information from a network device, wherein the first downlink control information indicates n terminal devices to perform data transmission, n is an integer greater than or equal to 2, and the terminal device is one of the n terminal devices;
• receiving, by the terminal device, first information from the network device, wherein the first information comprises a first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port, the at least one first sequence value comprises index values of demodulation reference signal (DMRS) antenna port combinations corresponding to the n terminal devices, and the at least one second sequence value comprises index values indicating pairing sequences of the n terminal devices;
• and
• performing, by the terminal device, data transmission with the network device based on the first downlink control information.

A data transmission apparatus, comprising:

• one or more processors;
• and
• a non-transitory computer readable memory, storing computer-executable instructions that, when executed by the one or more processors, cause the data transmission apparatus to perform operations comprising:
• determining first downlink control information;
• sending first information to n terminal devices, wherein the first information comprises a first correspondence table, the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port, the at least one first sequence value comprises index values of demodulation reference signal (DMRS) antenna port combinations corresponding to the n terminal devices, and the at least one second sequence value comprises index values indicating pairing sequences corresponding to the n terminal devices;
• and
• sending the first downlink control information to the n terminal devices, wherein the first downlink control information indicates the n terminal devices to perform data transmission, and n is an integer greater than or equal to 2.

A data transmission apparatus, comprising:

• one or more processors;
• and
• a non-transitory computer readable memory storing computer-executable instructions that, when executed by the one or more processors, cause the data transmission apparatus to perform operations comprising:
• receiving first downlink control information from a network device, wherein the first downlink control information comprises information for n terminal devices to perform data transmission, n is an integer greater than or equal to 2, and the data transmission apparatus is one of the n terminal devices;
• receiving first information from the network device, wherein the first information comprises a first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port, the at least one first sequence value comprises index values of demodulation reference signal (DMRS) antenna port combinations corresponding to the n terminal devices, and the at least one second sequence value comprises index values indicating pairing sequences of the n terminal devices;
• and
• performing data transmission with the network device based on the first downlink control information.