Base station signal transmission method, base station and terminal

1. A base station communicating with a terminal device, comprising:

a transceiver configured to interact with the terminal device; and

a processor configured to

perform rate matching of a unicast signal, capable of being demodulated using a pilot signal, according to a multicast/broadcast single frequency network reference signal (MBSFN RS) to match a quantity of data units to the quantity of resource elements; and

send, to the terminal device via the transceiver, the unicast signal and control signaling indicating not to use either of a first resource element (RE) corresponding to the pilot signal and an RE group corresponding to the pilot signal to demodulate the unicast signal.

2. The base station according to claim 1 , wherein the processor is further configured to send downlink control information (DCI), to the terminal device by using the transceiver, wherein the DCI is used to instruct the terminal device to perform rate de-matching and receive the unicast signal according to the MBSFN RS.

3. The base station according to claim 1 , wherein a subframe in which the processor sends the unicast signal by using the transceiver comprises one or more of: a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS), a channel state information-interference measurement resource (CSI-IMR), a demodulation reference signal (DMRS), or a positioning reference signal (PRS).

4. The base station according to claim 1 , wherein the one of the first RE and the RE group is specifically at least one RE on which a demodulation pilot corresponding to the unicast signal is overlapped with the MBSFN RS, or is predefined or is configured by higher layer signaling.

5. The base station according to claim 1 , wherein the base station is an evolved NodeB (eNodeB), a radio base station (NodeB), a radio network controller (RNC), or a repeater.

6. A terminal device communicating with a base station, comprising:

a transceiver configured to interact with the base station; and

a processor configured to

receive, by using the transceiver, a unicast signal capable of being demodulated using a pilot signal and sent by the base station and control signaling indicating not to use either of a first resource element (RE) corresponding to the pilot signal or an RE group corresponding to the pilot signal to demodulate the unicast signal, wherein the unicast signal is obtained by the base station by performing rate matching of the unicast signal according to a multicast/broadcast single frequency network reference signal (MBSFN RS) to match a quantity of data units to the quantity of resource elements; and

perform rate de-matching of the unicast signal according to the MBSFN RS when receiving the unicast signal by using the transceiver.

7. The terminal device according to claim 6 , wherein the processor is further configured to receive, by using the transceiver, downlink control information (DCI) sent by the base station, wherein the DCI is used to instruct the terminal device to perform rate de-matching and receive the transmitted unicast signal according to the MBSFN RS.

8. The terminal device according to claim 6 , wherein a subframe in which the processor receives the unicast signal by using the transceiver comprises one or more of: a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS), a channel state information-interference measurement resource (CSI-IMR), a demodulation reference signal (DMRS), or a positioning reference signal (PRS).

9. The terminal device according to claim 6 , wherein

the first RE or the RE group is specifically at least one RE on which a demodulation pilot corresponding to the unicast signal is overlapped with the MBSFN RS, or is predefined or is configured by higher layer signaling, and

the processor is configured to avoid using, according to the control signaling, the at least one RE to demodulate the unicast signal.

10. A signal transmission method, comprising:

sending, by a base station, control signaling to a terminal device, the control signaling indicating not to use either of a first resource element (RE) corresponding to a pilot signal and an RE group corresponding to the pilot signal to demodulate a unicast signal capable of being demodulated using the pilot signal;

performing, by the base station, rate matching of the unicast signal according to a multicast/broadcast single frequency network reference signal (MBSFN RS) to match a quantity of data units to the quantity of resource elements; and

sending, by the base station, the unicast signal to the terminal device.

11. The method according to claim 10 , wherein the method further comprises:

sending, by the base station, downlink control information (DCI) to the terminal device, wherein the DCI is used to instruct the terminal device to perform rate de-matching and receive the unicast signal according to the MBSFN RS.

12. The method according to claim 10 , wherein a subframe in which the base station sends the unicast signal comprises one or more of: a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS), a channel state information-interference measurement resource (CSI-IMR), a demodulation reference signal (DMRS), or a positioning reference signal (PRS).

13. The method according to claim 10 , wherein the one of the first RE and the RE group is specifically: at least one RE on which a demodulation pilot corresponding to the unicast signal is overlapped with the MBSFN RS, or is predefined or is configured by higher layer signaling.