Method and apparatus for triggering a beam state information report in a wireless communication system
Methods and apparatuses for beam management with user equipment beam sweeping in a wireless communication system are disclosed herein. In one method, a network node transmits a reference signal for beam management within one occasion, wherein the occasion comprises at least M symbol sets. The network node performs beam sweeping for transmitting the reference signal in a first symbol set of the M symbol sets. The network node repeats the beam sweeping for transmitting the reference signal in the rest of the M symbol sets.
1. A method of beam management at a user equipment (UE), the method comprising:
measuring, by the UE, reference signals for beam management within one occasion within a single transmission period associated with the reference signals, wherein the one occasion consists of 14 orthogonal frequency-division multiplexing (OFDM) symbols and the one occasion is smaller than the single transmission period, and wherein the one occasion comprises at least M symbol sets continuously located in a time domain and at least one remaining OFDM symbol, and there are multiple symbols in each of the at least M symbol sets and the reference signals for beam management are transmitted in all of the multiple symbols; and
wherein the UE utilizes at least one UE beam to measure the reference signals in a first symbol set of the at least M symbol sets and then switches to another UE beam to measure the reference signals in a second symbol set of the at least M symbol sets.
2. The method of claim 1 , wherein M is equal to a UE beam sweeping number of the UE.
3. The method of claim 1 , further comprising: performing, by the UE, m times UE beam switching, wherein 1≤m≤M.
4. The method of claim 1 , wherein the number of symbols in the at least M symbol sets are the same.
5. The method of claim 1 , wherein at least one of the reference signals is a periodic reference signal, wherein there is at least one occasion of the periodic reference signal every transmission period.
6. The method of claim 1 , wherein at least one of the reference signals is triggered via a downlink signaling and the occasion is indicated in the downlink signaling.
7. The method of claim 1 , wherein the UE reports a received power or quality of at least one of the reference signals, and an index associated with a symbol in which the reported received power or the reported quality is measured.
8. The method of claim 1 , further comprising:
receiving other downlink transmission in the at least one remaining symbol, or transmitting other uplink transmission in the at least one remaining symbol.
9. The UE of claim 8 , wherein the other downlink transmission is any of Channel State Information Reference Signal (CSI-RS) transmission, reference signal transmission for Radio Resource Management (RRM) measurement, and reference signal transmission for measurement of other Transmission/Reception Points (TRPs) or network nodes.
10. The UE of claim 8 , wherein the other uplink transmission is Sound Reference Signal (SRS) transmission.
11. A user equipment (UE) configured to facilitate beam management, comprising:
a processor; and
a memory operatively coupled to the processor, wherein the processor is configured to execute a program code to:
measure, by the UE, reference signals for beam management within one occasion within a single transmission period associated with the reference signals, wherein the one occasion consists of 14 orthogonal frequency-division multiplexing (OFDM) symbols and the one occasion is smaller than the single transmission period, and wherein the one occasion comprises at least M symbol sets continuously located in a time domain and at least one remaining OFDM symbol, and there are multiple symbols in each of the at least M symbol sets and the reference signals for beam management are transmitted in all of the multiple symbols; and
wherein the UE utilizes at least one UE beam to measure the reference signals in a first symbol set of the at least M symbol sets and then switches to another UE beam to measure the reference signals in a second symbol set of the at least M symbol sets.
12. The UE of claim 11 , wherein M is equal to a UE beam sweeping number of the UE.
13. The UE of claim 11 , wherein the processor is further configured to execute a program code to:
perform, by the UE, m times UE beam switching, wherein 1≤m≤M.
14. The UE of claim 11 , wherein the number of symbols in the at least M symbol sets are the same.
15. The UE of claim 11 , wherein at least one of the reference signals is a periodic reference signal, wherein there is at least one occasion of the periodic reference signal every transmission period.
16. The UE of claim 11 , wherein at least one of the reference signal is triggered via a downlink signaling and the occasion is indicated in the downlink signaling.
17. The UE of claim 11 , wherein the UE reports a received power or quality of at least one of the reference signals, and an index associated with a symbol in which the reported received power or the reported quality is measured.
18. The UE of claim 11 , the processor is further configured to execute a program code to:
receive other downlink transmission in the at least one remaining symbol, or transmit other uplink transmission in the at least one remaining symbol.
19. The UE of claim 18 , wherein the other downlink transmission is any of Channel State Information Reference Signal (CSI-RS) transmission, reference signal transmission for Radio Resource Management (RRM) measurement, and reference signal transmission for measurement of other Transmission/Reception Points (TRPs) or network nodes.
20. The UE of claim 18 , wherein the other uplink transmission is Sound Reference Signal (SRS) transmission.