Reception (RX) beam sweep scale factor
Some embodiments include systems, apparatuses, methods, and computer-readable media for use in a wireless network for determining a reception (Rx) beam sweep scale factor, N, that enables a user equipment (UE) to perform Rx beam refinement. Some embodiments are directed to a 5G Node B (gNB) that includes processor circuitry and radio front end circuitry. The processor circuitry can be configured to receive, using the radio front end circuitry, a MaxNumberRxB cam capability of the UE. The processor circuitry can determine based at least on the MaxNumberRxBeam capability of the UE and/or a Channel-State Information (CSI)-reference signal (RS) set with a repetition parameter configured to be ‘ON’, the value of N. The processor circuitry can generate a message comprising the value N, and encode the message for transmission to the UE, where N Rx beam sweeps enable the UE to perform Rx beam refinement.
1. A base station (BS), comprising:
radio front end circuitry; and
processor circuitry coupled to the radio front end circuitry, configured to:
determine a number of resources in a Channel-State Information (CSI)-reference signal (RS) set for a user equipment (UE);
determine, based at least on the CSI-RS set and a maximum number of reception (Rx) beam capability (MaxNumberRxBeam) of the UE, an Rx beam sweep scale factor, N, where N is an integer;
generate a message comprising N;
transmit via the radio front end circuitry, the message to the UE, wherein N Rx beam sweeps enable the UE to perform Rx beam refinement; and
wherein to determine N, the processor circuitry is configured to:
based on a determination that the number of resources in the CSI-RS set is greater than or equal to the MaxNumberRxBeam, set N to ‘1’.
2. The BS of claim 1 , wherein the processor circuitry is further configured to:
set a repetition parameter of the CSI-RS set to ‘ON,’ wherein the message comprises the CSI-RS set;
determine that the UE has not indicated the MaxNumberRxBeam; and
based at least on the determination that the UE has not indicated the MaxNumberRxBeam, set N equal to 8.
3. The BS of claim 1 , wherein the processor circuitry is further configured to:
set a repetition parameter of the CSI-RS set to ‘ON,’ wherein the message comprises the CSI-RS set; and
receive via the radio front end circuitry, the MaxNumberRxBeam of the UE.
4. The BS of claim 3 , wherein to determine N, the processor circuitry is configured to:
based on a determination that the number of resources in the CSI-RS set is less than the MaxNumberRxBeam,
set N to a ceiling of (the MaxNumberRxBeam/the number of resources in the CSI-RS set).
5. The BS of claim 1 , wherein to transmit the message to the UE, the processor circuitry is further configured to: encode the message for transmission to the UE.
6. The BS of claim 1 , wherein the radio front end circuitry is configured to: operate in a frequency range comprising 24250 MHz-52600 MHZ.
7. The BS of claim 1 , wherein a time for the UE to perform the Rx beam refinement using N comprises: N*max (T CSI-RS,i ), where T CSI-RS,i is a periodicity of the number of resources in the CSI-RS set.
8. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a user equipment (UE), cause the processor to perform operations, the operations comprising:
receiving a message comprising:
a Channel-State Information (CSI)-reference signal (RS) set comprising a number of resources, wherein a repetition parameter of the CSI-RS set is set to ‘ON’; and
a reception (Rx) beam sweep scale factor, N, where N is an integer, wherein N is based at least on the CSI-RS set and a maximum number of reception (Rx) beam capability (MaxNumberRxBeam) of the UE, wherein the number of resources in the CSI-RS set is greater than or equal to the MaxNumberRxBeam, and N is equal to ‘1’; and
performing Rx beam refinement using N.
9. The non-transitory computer-readable medium of claim 8 , wherein a time for performing the Rx beam refinement using N comprises: N*max (T CSI-RS,i ), where T CSI-RS,i is a periodicity of the number of resources in the CSI-RS set.
10. The non-transitory computer-readable medium of claim 8 , wherein the UE has not indicated the MaxNumberRxBeam to a base station (BS), N is equal to 8, and wherein the operations further comprise: performing the Rx beam refinement based at least on 8 Rx beam sweeps.
11. The non-transitory computer-readable medium of claim 8 , wherein the operations further comprise:
transmitting to a base station (BS), the MaxNumberRxBeam of the UE.
12. The non-transitory computer-readable medium of claim 8 , wherein the operations further comprise: decoding the message.
13. The non-transitory computer-readable medium of claim 8 , wherein the operations further comprise operating in a frequency range comprising 24250 MHz-52600 MHZ.
14. A method of operating a base station (BS), comprising:
determining a number of periodic resources in a Channel-State Information (CSI)-reference signal (RS) set for a user equipment (UE);
determining based at least on the number of periodic resources in the CSI-RS set and a maximum number of reception (Rx) beam capability (MaxNumberRxBeam) of the UE, a reception (Rx) beam sweep scale factor, N, where N is an integer;
transmitting an encoded message comprising N to the UE, wherein N Rx beam sweeps enable the UE to perform Rx beam refinement; and
wherein the determining N comprises:
based on a determination that the number of periodic resources in the CSI-RS set is greater than or equal to the MaxNumberRxBeam, setting N to ‘1’.
15. The method of claim 14 , further comprising:
second determining that the UE has not indicated the MaxNumberRxBeam; and
based at least on the second determination, setting N equal to 8.
16. The method of claim 14 , further comprising:
receiving the MaxNumberRxBeam of the UE; and
based at least on the receiving, determining N based at least on the MaxNumberRxBeam and the number of periodic resources in the CSI-RS set.
17. The method of claim 16 , wherein the determining N comprises:
based on a determination that the number of periodic resources in the CSI-RS set is less than the MaxNumberRxBeam,
setting N to a ceiling of (the MaxNumberRxBeam/the number of periodic resources in the CSI-RS set).
18. The method of claim 14 , further comprises operating in a frequency range comprising 24250 MHz-52600 MHZ.
19. The method of claim 14 , wherein a time for the UE to perform the Rx beam refinement using N comprises: N*max (T CSI-RS,i ), where T CSI-RS,i is a periodicity of the number of resources in the CSI-RS set.