Method and user equipment for performing uplink repetitions and related base station
A method and a User Equipment (UE) for performing uplink repetitions and a related base station (BS) are provided. The method includes a UE receiving a Reference Signal Received Power (RSRP) threshold from a Base Station (BS); initiating a 4-step Random Access (RA) procedure; performing a Downlink (DL) Reference Signal (RS) measurement to obtain an RSRP measurement result; and performing a Message 1 (Msg1) repetition operation and a Message 3 (Msg3) repetition request operation within the 4-step RA procedure after determining that the RSRP measurement result is equal to or less than the RSRP threshold.
1. A method performed by a User Equipment (UE) for performing uplink repetitions, the method comprising:
receiving a Reference Signal Received Power (RSRP) threshold from a Base Station (BS);
initiating a 4-step Random Access (RA) procedure;
performing a Downlink (DL) Reference Signal (RS) measurement to obtain an RSRP measurement result; and
performing a Message 1 (Msg1) repetition operation and a Message 3 (Msg3) repetition request operation within the 4-step RA procedure after determining that the RSRP measurement result is equal to or less than the RSRP threshold,
wherein:
the Msg1 repetition operation comprises transmitting a Msg1 for the 4-step RA procedure multiple times before the UE monitors a Random Access Response (RAR) corresponding to the Msg1, and
the Msg3 repetition request operation comprises transmitting a Msg3 repetition request to the BS to request execution of a Msg3 repetition operation, the Msg3 repetition operation comprising:
transmitting a Msg3 for the 4-step RA procedure multiple times in response to receiving the RAR.
2. The method of claim 1 , further comprising:
receiving, from the BS, an indication that the UE is permitted to determine whether to perform both the Msg1 repetition operation and the Msg3 repetition request operation within the 4-step RA procedure according to a comparison of the RSRP threshold and the RSRP measurement result.
3. The method of claim 1 , wherein the RSRP threshold is configured for the UE to determine whether to perform the Msg1 repetition operation.
4. The method of claim 1 , wherein the RSRP threshold is configured for the UE to determine whether to perform the Msg3 repetition request operation.
5. The method of claim 1 , wherein the RSRP threshold is configured on a per-Bandwidth-Part (BWP) basis.
6. The method of claim 1 , wherein the RSRP threshold is configured on a per-RA-resource basis.
7. The method of claim 1 , wherein the Msg3 repetition request is transmitted via the Msg1.
8. A User Equipment (UE) for performing uplink repetitions, the UE comprising:
at least one processor; and
at least one memory coupled to the at least one processor, the at least one memory storing at least one computer-executable instruction that, when executed by the at least one processor, causes the UE to:
receive a Reference Signal Received Power (RSRP) threshold from a Base Station (BS);
initiate a 4-step Random Access (RA) procedure;
perform a Downlink (DL) Reference Signal (RS) measurement to obtain an RSRP measurement result; and
perform a Message 1 (Msg1) repetition operation and a Message 3 (Msg3) repetition request operation within the 4-step RA procedure after determining that the RSRP measurement result is equal to or less than the RSRP threshold,
wherein:
the Msg1 repetition operation comprises transmitting a Msg1 for the 4-step RA procedure multiple times before the UE monitors a Random Access Response (RAR) corresponding to the Msg1, and
the Msg3 repetition request operation comprises transmitting a Msg3 repetition request to the BS to request execution of a Msg3 repetition operation, the Msg3 repetition operation comprising:
transmitting a Msg3 for the 4-step RA procedure multiple times in response to receiving the RAR.
9. The UE of claim 8 , wherein the at least one computer-executable instruction, when executed by the at least one processor, further causes the UE to:
receive, from the BS, an indication that the UE is permitted to determine whether to perform both the Msg1 repetition operation and the Msg3 repetition request operation within the 4-step RA procedure according to a comparison of the RSRP threshold and the RSRP measurement result.
10. The UE of claim 8 , wherein the RSRP threshold is configured for the UE to determine whether to perform the Msg1 repetition operation.
11. The UE of claim 8 , wherein the RSRP threshold is configured for the UE to determine whether to perform the Msg3 repetition request operation.
12. The UE of claim 8 , wherein the RSRP threshold is configured on a per-Bandwidth-Part (BWP) basis.
13. The UE of claim 8 , wherein the RSRP threshold is configured on a per-RA-resource basis.
14. The UE of claim 8 , wherein the Msg3 repetition request is transmitted via the Msg1.
15. A Base Station (BS) for communication with a User Equipment (UE) performing uplink repetitions, the BS comprising:
at least one processor; and
at least one memory coupled to the at least one processor, the at least one memory storing at least one computer-executable instruction that, when executed by the at least one processor, causes the BS to:
transmit a Reference Signal Received Power (RSRP) threshold to the UE; and
transmit at least one Downlink (DL) Reference Signal (RS) to the UE, causing the UE to:
perform a DL RS measurement to obtain an RSRP measurement result; and
perform a Message 1 (Msg1) repetition operation and a Message 3 (Msg3) repetition request operation within a 4-step Random Access (RA) procedure in a case that the RSRP measurement result is equal to or less than the RSRP threshold,
wherein:
the Msg1 repetition operation comprises the UE transmitting a Msg1 for the 4-step RA procedure multiple times before monitoring a Random Access Response (RAR) corresponding to the Msg 1, and
the Msg3 repetition request operation comprises the UE transmitting a Msg3 repetition request to the BS to request execution of a Msg3 repetition operation, the Msg3 repetition operation comprising:
the UE transmitting a Msg3 for the 4-step RA procedure multiple times in response to the UE receiving the RAR.
16. The BS of claim 15 , wherein the at least one computer-executable instruction, when executed by the at least one processor, further causes the BS to:
transmit, to the UE, an indication that the UE is permitted to determine whether to perform both the Msg1 repetition operation and the Msg3 repetition request operation within the 4-step RA procedure according to a comparison of the RSRP threshold and the RSRP measurement result.
17. The BS of claim 15 , wherein the RSRP threshold is configured for the UE to determine whether to perform the Msg1 repetition operation.
18. The BS of claim 15 , wherein the RSRP threshold is configured for the UE to determine whether to perform the Msg3 repetition request operation.
19. The BS of claim 15 , wherein the RSRP threshold is configured on a per-Bandwidth-Part (BWP) basis.
20. The BS of claim 15 , wherein the RSRP threshold is configured on a per-RA-resource basis.
21. The BS of claim 15 , wherein the at least one computer-executable instruction, when executed by the at least one processor, further causes the BS to:
receive the Msg3 repetition request from the UE via the Msg1.