Reference signal sending and receiving method, network device, and terminal device
This application provides a reference signal sending and receiving method, a network device, and a terminal device. The method includes: determining, by a network device, a transmit power used to transmit a reference signal, where the transmit power is related to a quantity of ports carried on an RE occupied by the reference signal; and sending, by the network device, the reference signal based on the transmit power.
1. A method, comprising:
determining, by a network device, a transmit power to be used to transmit a reference signal, wherein the transmit power is related to a quantity of ports carried on a resource element (RE) to be occupied by the reference signal, and the transmit power of the reference signal is determined using a currently used pilot pattern and correspondences between at least three pre-stored power boosting power boosting values and a plurality of pilot patterns; and
sending, by the network device, the reference signal based on the transmit power.
2. The method according to claim 1 , further comprising:
sending, by the network device, first indication information, wherein the first indication information indicates a sum of respective transmit powers allocated to the ports currently carried on the RE.
3. A method, comprising:
receiving, by a terminal device, a reference signal;
determining, by the terminal device, a transmit power of the reference signal, wherein the transmit power is related to a quantity of ports carried on a resource element (RE) occupied by the reference signal, and the transmit power of the reference signal is determined using a currently used pilot pattern and correspondences between at least three pre-stored power boosting power boosting values and a plurality of pilot patterns; and
performing, by the terminal device, channel estimation based on the reference signal and the transmit power.
4. A terminal device, comprising:
a receiver, configured to receive a reference signal;
a processor; and
a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for: and
determining a transmit power of the reference signal, wherein the transmit power is related to a maximum quantity of ports that can be carried on a resource element (RE) occupied by the reference signal, and the transmit power of the reference signal is determined using a currently used pilot pattern and correspondences between at least three pre-stored power boosting power boosting values and a plurality of pilot patterns; and
performing channel estimation based on the reference signal and the transmit power.
5. The terminal device according to claim 4 , wherein the receiver is further configured to:
receive first indication information, wherein the first indication information indicates a sum of respective transmit powers allocated to the ports carried on the RE occupied by the reference signal.
6. The terminal device according to claim 5 , wherein the first indication information is carried in a radio resource control (RRC) message.
7. The terminal device according to claim 4 , wherein the program further includes instructions for:
receiving indication information indicating the currently used pilot pattern.
8. The terminal device according to claim 7 , wherein the indication information is received using radio resource control (RRC) signaling.
9. The terminal device according to claim 4 , wherein the channel estimation is performed to measure channel state information (CSI); and
wherein the program further includes instructions for:
sending measured CSI information to a network device.
10. The method according to claim 1 , further comprising:
sending indication information indicating the currently used pilot pattern.
11. The method according to claim 10 , wherein the indication information is sent using radio resource control (RRC) signaling.
12. The method according to claim 1 , further comprising:
receiving channel state information (CSI) that is measured using the reference signal.
13. The method according to claim 3 , further comprising:
receiving indication information indicating the currently used pilot pattern.
14. The method according to claim 13 , wherein the indication information is received using radio resource control (RRC) signaling.
15. The method according to claim 3 , wherein the channel estimation is performed to measure channel state information (CSI); and
wherein the method further comprises:
sending measured CSI information to a network device.