Downlink control signaling sending method and device
The present disclosure provides a downlink control signaling sending method and device. The method includes: determining, by a base station, a first transmission type of a first terminal device and a second transmission type of a second terminal device; and sending demodulation information to the first terminal device according to the first transmission type and the second transmission type by using downlink control signaling, where the demodulation information is used to instruct the first terminal device to demodulate a transmission signal of the first terminal device that is received by the first terminal device. In this way, content of the demodulation information to be sent is specifically determined, so as to effectively resolve a problem that, during pairing at a plurality of layers, when different power ratios are configured on different subbands, a large amount of signaling needs to be consumed for notification to the first terminal device.
1. A downlink control signaling sending method, comprising:
determining, by a base station, a first transmission type of a first terminal device and a second transmission type of a second terminal device, wherein the first transmission type is different than the second transmission type; and
sending, by the base station, demodulation information to the first terminal device according to the first transmission type and the second transmission type using downlink control signaling, wherein the demodulation information comprises first control information enabling successful demodulation, by the first terminal device, of a transmission signal of the first terminal device and second control information enabling successful demodulation, by the first terminal device, of a transmission signal of the second terminal device, wherein the demodulation information instructs the first terminal device to demodulate the transmission signal of the first terminal device using the first control information and the second control information, wherein the demodulation information further comprises a multiplexing mode and transmission information, wherein the multiplexing mode represents association information between a data signal of the first terminal device and a reference signal used by the second terminal device at the pairing layer, and wherein the transmission information comprises:
a signal and data received by the first terminal device when the first terminal device and the second terminal device are paired; and
a signal and data that are received by the second terminal device when the first terminal device and the second terminal device are paired.
2. The method of claim 1 , wherein when the first transmission type is non-codebook-based transmission and the second transmission type is codebook-based transmission, the demodulation information comprises:
a transmission mode of the second terminal device and layer pairing information between the first terminal device and the second terminal device; or
a transmission manner of the second terminal device and layer pairing information between the first terminal device and the second terminal device.
3. The method of claim 1 , wherein when the first transmission type is codebook-based transmission and the second transmission type is non-codebook-based transmission, the demodulation information comprises:
layer pairing information between the first terminal device and the second terminal device and power pairing information between the first terminal device and the second terminal device;
an antenna port of the second terminal device, a scrambling identity of the second terminal device, and a layer number of the second terminal device; or
layer pairing information between the first terminal device and the second terminal device and a scrambling identity of the second terminal device.
4. The method of claim 1 , wherein when the first transmission type is non-codebook-based transmission, the second transmission type is non-codebook-based transmission, and a reference signal used by the first terminal device at a pairing spatial layer is the same as a reference signal used by the second terminal device at the pairing spatial layer, the demodulation information comprises layer pairing information between the first terminal device and the second terminal device and power pairing information between the first terminal device and the second terminal device.
5. The method of claim 1 , wherein when the first transmission type is non-codebook-based transmission, the second transmission type is non-codebook-based transmission, and a reference signal used by the first terminal device at a pairing spatial layer is different from a reference signal used by the second terminal device at the pairing spatial layer, the demodulation information comprises:
layer pairing information between the first terminal device and the second terminal device and power pairing information between the first terminal device and the second terminal device;
an antenna port of the second terminal device, a scrambling identity of the second terminal device, and a layer number of the second terminal device; or
layer pairing information between the first terminal device and the second terminal device and a scrambling identity of the second terminal device.
6. The method of claim 1 , wherein when the first terminal device and the second terminal device use at least two same spatial layers:
the demodulation information carries a modulation scheme of the first terminal device at each spatial layer and power pairing information between the first terminal device and the second terminal device; or
the power pairing information is obtained after the base station schedules same power allocation information of the first terminal device and the second terminal device at the at least two same spatial layers, wherein the demodulation information further carries modulation scheme combination information, and wherein the modulation scheme combination information is obtained after the base station schedules same modulation schemes of the first terminal device and the second terminal device at the at least two same spatial layers.
7. The method of claim 6 , further comprising:
when a first reference signal used by the second terminal device that performs non-codebook-based transmission and data sent by the first terminal device that performs codebook-based transmission have a conflict in a time domain and a frequency domain, performing, by the base station, puncturing or rate matching on the data sent by the first terminal device; or
when a second reference signal used by the first terminal device that performs non-codebook-based transmission and data sent by the second terminal device that performs codebook-based transmission have a conflict in a time domain and a frequency domain, performing, by the base station, puncturing or rate matching on the data sent by the second terminal device.
8. The method of claim 1 , when a first reference signal used by the second terminal device that performs non-codebook-based transmission and data sent by the first terminal device that performs codebook-based transmission have a conflict in a time domain and a frequency domain, performing, by the base station, puncturing or rate matching on the data sent by the first terminal device.
9. A base station, comprising:
a processor configured to determine a first transmission type of a first terminal device and a second transmission type of a second terminal device; and
a transmitter coupled to the processor and configured to send, according to the first transmission type and the second transmission type, demodulation information to the first terminal device using downlink control signaling, wherein the demodulation information comprises first control information enabling successful demodulation, by the first terminal device, of a transmission signal of the first terminal device and second control information enabling successful demodulation, by the first terminal device, of a transmission signal of the second terminal device, the demodulation information instructs the first terminal device to demodulate the transmission signal of the first terminal device using the first control information and the second control information, wherein the demodulation information further comprises a multiplexing mode and transmission information, wherein the multiplexing mode represents association information between a data signal of the first terminal device and the reference signal used by the second terminal device at the pairing layer, and wherein the transmission information comprises:
a signal and data received by the first terminal device when the first terminal device and the second terminal device are paired; and
a signal and data received by the second terminal device when the first terminal device and the second terminal device are paired.
10. The base station of claim 9 , wherein when the first transmission type is non-codebook-based transmission and the second transmission type is codebook-based transmission, the demodulation information comprises:
a transmission mode of the second terminal device and layer pairing information between the first terminal device and the second terminal device; or
a transmission manner of the second terminal device and layer pairing information between the first terminal device and the second terminal device.
11. The base station of claim 9 , wherein when the first transmission type is codebook-based transmission and the second transmission type is non-codebook-based transmission, the demodulation information comprises:
layer pairing information between the first terminal device and the second terminal device and power pairing information between the first terminal device and the second terminal device; or
an antenna port of the second terminal device, a scrambling identity of the second terminal device, and a layer number of the second terminal device; or
layer pairing information between the first terminal device and the second terminal device and a scrambling identity of the second terminal device.
12. The base station of claim 9 , wherein when the first transmission type is non-codebook-based transmission, the second transmission type is non-codebook-based transmission, and a reference signal used by the first terminal device at a pairing spatial layer is the same as a reference signal used by the second terminal device at the pairing spatial layer, the demodulation information comprises layer pairing information between the first terminal device and the second terminal device and power pairing information between the first terminal device and the second terminal device.
13. The base station of claim 9 , wherein when the first transmission type is non-codebook-based transmission, the second transmission type is non-codebook-based transmission, and a reference signal used by the first terminal device at a pairing spatial layer is different from a reference signal used by the second terminal device at the pairing spatial layer, the demodulation information comprises:
layer pairing information between the first terminal device and the second terminal device and power pairing information between the first terminal device and the second terminal device; or
an antenna port of the second terminal device, a scrambling identity of the second terminal device, and a layer number of the second terminal device; or
layer pairing information between the first terminal device and the second terminal device and a scrambling identity of the second terminal device.
14. The base station of claim 9 , wherein when the first terminal device and the second terminal device use at least two same spatial layers:
the demodulation information carries a modulation scheme of the first terminal device at each spatial layer and power pairing information between the first terminal device and the second terminal device; or
the power pairing information is obtained after the base station schedules same power allocation information of the first terminal device and the second terminal device at the at least two same spatial layers, wherein the demodulation information further carries modulation scheme combination information, and wherein the modulation scheme combination information is obtained after the base station schedules same modulation schemes of the first terminal device and the second terminal device at the at least two same spatial layers.
15. The base station of claim 14 , wherein the processor is further configured to:
when a first reference signal used by the second terminal device that performs non-codebook-based transmission and data sent by the first terminal device that performs codebook-based transmission have a conflict in a time domain and a frequency domain, perform puncturing or rate matching on the data sent by the first terminal device; or
when a second reference signal used by the first terminal device that performs non-codebook-based transmission and data sent by the second terminal device that performs codebook-based transmission have a conflict in a time domain and a frequency domain, perform puncturing or rate matching on the data sent by the second terminal device.
16. A non-transitory computer readable storage medium comprising program code that, when executed by a processor, causes a base station to:
determine a first transmission type of a first terminal device and a second transmission type of a second terminal device; and
send demodulation information to the first terminal device according to the first transmission type and the second transmission type using downlink control signaling, wherein the demodulation information comprises first control information enabling successful demodulation, by the first terminal device, of a transmission signal of the first terminal device and second control information enabling successful demodulation, by the first terminal device, of a transmission signal of the second terminal device, wherein the demodulation information instructs the first terminal device to demodulate a transmission signal of the first terminal device that is received by the first terminal device using the first control information and the second control information, wherein the demodulation information further comprises a multiplexing mode and transmission information, wherein the multiplexing mode represents association information between a data signal of the first terminal device and the reference signal used by the second terminal device at the pairing layer, and wherein the transmission information comprises:
a signal and data received by the first terminal device when the first terminal device and the second terminal device are paired; and
a signal and data received by the second terminal device when the first terminal device and the second terminal device are paired.