Wireless communication system, and device and method in wireless communication system
Disclosed are a device and method in a wireless communication system. The device comprises: a first generating unit configured to generate a first pre-coding matrix according to first channel information on a channel between a first communication apparatus and a second communication apparatus; a second generating unit configured to generate a second pre-coding matrix according to the first pre-coding matrix and second channel information on the channel; and a pre-coding unit configured to pre-code a data signal according to the first pre-coding matrix and the second pre-coding matrix. According to the embodiments of the present invention, interference between user equipment can be effectively removed, the operation complexity is reduced, and the whole performance of the system is optimized.
1. A device in a wireless communication system, the device comprising:
circuitry, configured to
acquire first channel information on a channel between a first communication apparatus and a second communication apparatus;
pre-code a first reference signal based on the first channel information;
generate measurement configuration information for the second communication apparatus, the measurement configuration information comprising a measurement indication for the pre-coded first reference signal; and
control data signal transmission based on second channel information, which is fed back for the pre-coded first reference signal by the second communication apparatus according to the measurement configuration information.
2. The device according to claim 1 , wherein the circuitry is further configured to pre-code the first reference signal further based on channel information related to an other communication apparatus.
3. The device according to claim 1 , wherein the circuitry is further configured to control the data signal transmission further based on channel information related to an other communication apparatus.
4. The device according to claim 1 , wherein the circuitry is further configured to acquire the first channel information of a plurality of the second communication apparatuses,
the circuitry is further configured to
determine, based on the first channel information of each of the plurality of the second communication apparatuses, whether the first communication apparatus is to send the pre-coded first reference signal to a corresponding second communication apparatus,
wherein the circuitry is configured to pre-code, based on a result of the determining, the first reference signal for the first channel information of one or more of the plurality of the second communication apparatuses.
5. The device according to claim 4 , wherein the circuitry is further configured to calculate, for the first channel information of one or more of the plurality of the second communication apparatuses, pre-coding matrixes of respective second communication apparatuses, and pre-code the first reference signal utilizing superposition of the pre-coding matrixes.
6. The device according to claim 4 , wherein the circuitry is further configured to calculate, for the first channel information of one or more of the plurality of the second communication apparatuses, pre-coding matrixes of respective second communication apparatuses, and pre-code the first reference signal utilizing the pre-coding matrixes respectively, and wherein the circuitry is configured to allocate different code words, time or frequency resources to the first reference signal for one or more of the plurality of the second communication apparatuses so as to perform multiplexing.
7. The device according to claim 4 , wherein the circuitry is further configured to allocate, based on the first channel information, radio resources for transmission of the pre-coded first reference signal and/or a data signal.
8. The device according to claim 1 , wherein the circuitry is further configured to acquire feedback information for a second reference signal of the second communication apparatus as the first channel information.
9. The device according to claim 8 , wherein the second reference signal is transmitted on only a part of antennas in an antenna array of the first communication apparatus.
10. The device according to claim 8 , wherein the circuitry is further configured to perform static/semi-static beamforming on the second reference signal,
acquire feedback information for the beamformed second reference signal of the second communication apparatus as the first channel information.
11. The device according to claim 8 , wherein the first reference signal is a narrow band signal.
12. The device according to claim 8 , wherein the second reference signal is a wideband signal.
13. The device according to claim 8 , wherein a transmission cycle of the first reference signal is shorter than that of the second reference signal.
14. The device according to claim 1 , wherein the circuitry is further configured to acquire the first channel information by performing channel estimation according to a third reference signal from the second communication apparatus.
15. The device according to claim 14 , wherein the third reference signal is an uplink sounding reference signal.
16. The device according to claim 1 , wherein the first communication apparatus is a base station, the second communication apparatus is user equipment.
17. The device according to claim 2 , wherein the circuitry is further configured to control the data signal transmission further based on channel information related to an other communication apparatus.
18. The device according to claim 2 , wherein the circuitry is further configured to acquire the first channel information of a plurality of the second communication apparatuses,
the circuitry is further configured to
determine, based on the first channel information of each of the plurality of the second communication apparatuses, whether the first communication apparatus is to send the pre-coded first reference signal to a corresponding second communication apparatus,
wherein the circuitry is configured to pre-code, based on a result of the determining, the first reference signal for the first channel information of one or more of the plurality of the second communication apparatuses.
19. A method in a wireless communication system, the method comprising:
a channel information acquiring step of acquiring first channel information on a channel between a first communication apparatus and a second communication apparatus;
a pre-coding step of pre-coding a first reference signal based on the first channel information;
a measurement configuration information generating step of generating measurement configuration information for the second communication apparatus, the measurement configuration information comprising a measurement indication for the pre-coded first reference signal; and
a controlling step of controlling data signal transmission based on second channel information, which is fed back for the pre-coded first reference signal by the second communication apparatus according to the measurement configuration information.