Method and apparatus for beam management in a wireless communication system
A method and apparatus are disclosed from the perspective of a base station. In one embodiment, the method includes the base station transmitting to a UE a control signal associated with a reference signal for beam measurement, wherein the control signal includes a beam-related information for transmitting the reference signal for beam measurement. The method also includes the base station transmitting the reference signal for beam measurement to the UE.
1. A method of a base station, comprising:
the base station transmits to a UE a control signal associated with a reference signal for beam measurement, wherein the control signal triggers aperiodical transmission of the reference signal for beam measurement, and wherein the control signal includes a beam-related information for transmitting the reference signal for beam measurement and indicates how many symbols are used to carry the reference signal for beam measurement; and
the base station transmits the reference signal for beam measurement to the UE.
2. The method of claim 1 , wherein the beam-related information indicates now abandoned at least a beam on which the reference signal for beam measurement is transmitted.
3. The method of claim 1 , wherein the beam-related information indicates a first beam, and wherein the reference signal for beam measurement is transmitted on at least a refined beam of the first beam.
4. The method of claim 1 , wherein the control signal is transmitted via a control channel.
5. A method of a User Equipment (UE), comprising:
the UE receives from a base station a control signal associated with a reference signal for beam measurement, wherein the control signal includes beam-related information for transmitting the reference signal for beam measurement and indicates how many symbols are used to carry the reference signal for beam measurement; and
the UE measures the reference signal for beam measurement from the base station.
6. The method of claim 5 , wherein the beam-related information indicates at least a beam on which the reference signal for beam measurement is transmitted.
7. The method of claim 5 , wherein the beam-related information indicates a first beam, and wherein the reference signal for beam measurement is transmitted on at least a refined beam of the first beam.
8. The method of claim 5 , wherein the UE performs measurement on the reference signal for beam measurement with UE beam(s) associated with the at least a beam indicated by the beam-related information.
9. The method of claim 5 , wherein beam refinement for the UE is performed for the at least a beam indicated by the beam-related information.
10. The method of claim 5 , wherein the reference signal for beam measurement is transmitted aperiodically.
11. The method of claim 5 , wherein the control signal is transmitted via a control channel.
12. A base station, comprising:
a control circuit;
a processor installed in the control circuit; and
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to:
transmit to a UE a control signal associated with a reference signal for beam measurement, wherein the control signal triggers aperiodical transmission of the reference signal for beam measurement, and wherein the control signal includes a beam-related information for transmitting the reference signal for beam measurement and indicates how many symbols are used to carry the reference signal for beam measurement; and
transmit the reference signal for beam measurement to the UE.
13. The base station of claim 12 , wherein the beam-related information indicates at least a beam on which the reference signal for beam measurement is transmitted.
14. The base station of claim 12 , wherein the beam-related information indicates a first beam, and wherein the reference signal for beam measurement is transmitted on at least a refined beam of the first beam.
15. The base station of claim 12 , wherein the control signal is transmitted via a control channel.