Message processing method and apparatus
Embodiments of the present disclosure provide a message processing method and apparatus. The method includes: determining a transmission type of information to be sent to a terminal device and a transmission parameter corresponding to the transmission type; and sending, to the terminal device, a notification message carrying an indication field, where the indication field is used to indicate the transmission type and the transmission parameter, so that the terminal device receives data based on the transmission type and the transmission parameter; and at least one state of the indication field indicates that the transmission type is a first multiuser superposition transmission type, or at least one state of the indication field indicates that the transmission type is a third multiuser superposition transmission type. Based on the message processing method and apparatus provided in the embodiments of the present disclosure, transmission efficiency of a system can be increased.
1. A method for message processing, the method comprising:
receiving, by a terminal device included in a multiuser superposition transmission (MUST) system, a notification message carrying an indication field from a base station, wherein the indication field to indicates a transmission type and a transmission parameter of information to be sent from the base station to the terminal device, wherein the transmission type indicated by the indication field is a first multiuser superposition transmission type or a second multiuser superposition transmission type;
obtaining, by the terminal device, based on a correspondence between a value of the indication field and the transmission type and the transmission parameter, the transmission type and the transmission parameter corresponding to the value of the indication field; and
receiving, by the terminal device, data based on the transmission type and the transmission parameter.
2. The method according to claim 1 , wherein the transmission type indicated by the indication field is the first multiuser superposition transmission type, and the transmission parameter indicated by the indication field comprises a power ratio of the terminal device to a paired terminal device.
3. The method according to claim 2 , wherein the power ratio of the terminal device to the paired terminal device comprises a ratio of a power of a first signal sent from the base station to the terminal device on a first spatial layer to a power of a second signal sent from the base station to the paired terminal device on the first spatial layer, wherein powers of signals sent from the base station to the terminal device on the first spatial layer and a second spatial layer are the same.
4. The method according to claim 1 , wherein the transmission type indicated by the indication field is the second multiuser superposition transmission type, and the transmission parameter indicated by the indication field comprises at least one of a power ratio of the terminal device to a paired terminal device, precoding information of the paired terminal device, or a modulation scheme of the paired terminal device.
5. A base station, comprising:
a processor; and
a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
determine a transmission type of information and a transmission parameter corresponding to the transmission type to be sent to a terminal device; and
send a notification message carrying an indication field to the terminal device, wherein the indication field indicates the transmission type and the transmission parameter, wherein the transmission type indicated by the indication field is a first multiuser superposition transmission type or a second multiuser superposition transmission type.
6. The base station according to claim 5 , wherein the transmission type indicated by the indication field is the first multiuser superposition transmission type, and the transmission parameter indicated by the indication field comprises a power ratio of the terminal device to a paired terminal device.
7. The base station according to claim 6 , wherein the power ratio of the terminal device to the paired terminal device comprises a ratio of a power of a first signal sent from the base station to the terminal device on a first spatial layer to a power of a second signal sent from the base station to the paired terminal device on the first spatial layer, wherein powers of signals sent from the base station to the terminal device on the first spatial layer and a second spatial layer are the same; and the instructions further include:
not sending signals to the paired terminal device on the second spatial layer.
8. The base station according to claim 5 , wherein the transmission type indicated by the indication field is the second multiuser superposition transmission type, and the transmission parameter indicated by the indication field comprises at least one of a power ratio of the terminal device to a paired terminal device, precoding information of the paired terminal device, or a modulation scheme of the paired terminal device.
9. A terminal device, comprising:
a processor; and
a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
receive a notification message carrying an indication field from a base station, wherein the indication field indicates a transmission type and a transmission parameter of information to be sent from the base station to the terminal device, wherein the transmission type indicated by the indication field is a first multiuser superposition transmission type or a second multiuser superposition transmission type;
obtain, based on a correspondence between a value of the indication field and the transmission type and the transmission parameter, the transmission type and the transmission parameter corresponding to the value of the indication field; and
receive data based on the transmission type and the transmission parameter.
10. The terminal device according to claim 9 , wherein the transmission type indicated by the indication field is the first multiuser superposition transmission type, and the transmission parameter indicated by the indication field comprises a power ratio of the terminal device to a paired terminal device.
11. The terminal device according to claim 10 , wherein the power ratio of the terminal device to the paired terminal device comprises a ratio of a power of a first signal sent from the base station to the terminal device on a first spatial layer to a power of a second signal sent from the base station to the paired terminal device on the first spatial layer, wherein powers of signals sent from the base station to the terminal device on the first spatial layer and a second spatial layer are the same.
12. The terminal device according to claim 9 , wherein the transmission type indicated by the indication field is the second multiuser superposition transmission type, and the transmission parameter indicated by the indication field comprises at least one of a power ratio of the terminal device to a paired terminal device, precoding information of the paired terminal device, or a modulation scheme of the paired terminal device.