UE initiated beam management procedure
Apparatuses, systems, and methods for a wireless device to perform user equipment (UE) initiated beam management procedures with a base station or gNB. A wireless device in communication with a 5G base station may detect degradation in the pair of transmit and receive beams between the gNB and the device. The device may select a preferred beam management procedure and indicate the preference to the gNB.
1. A method for performing beam management, comprising:
by a base station:
establishing wireless communication with a user equipment device (UE);
transmitting, to the UE, an indication of a transmission beam of the base station used for communication with the UE;
transmitting, to the UE, a reference signal using the transmission beam;
receiving, from the UE, an indication of a preferred beam management procedure of a plurality of possible beam management procedures; and
performing a beam management procedure with the UE according to the indication of the preferred beam management procedure.
2. The method of claim 1 , wherein the indication of the preferred beam management procedure includes an indication of a number of resources, and wherein performing the beam management procedure uses the number of resources.
3. The method of claim 2 , wherein the indication of the preferred beam management procedure includes a number of beams for performing the beam management procedure and wherein performing the beam management procedure uses the number of beams.
4. The method of claim 3 , wherein the number of beams is equal to the number of resources.
5. The method of claim 3 , wherein the number of beams is a number of receive beams, wherein the number of resources is a number of channel state information resources.
6. The method of claim 3 , wherein the number of beams is a number of transmission beams, wherein the number of resources is a number of sounding reference signal resources.
7. The method of claim 2 , wherein the number of resources indicates that the UE is capable of a hierarchical search process.
8. The method of claim 1 , wherein the indication of the preferred beam management procedure includes a transmission configuration indicator.
9. An apparatus for managing a base station, the apparatus comprising:
a processor configured to cause the base station to:
communicate with a user equipment device (UE);
transmit, to the UE, an indication of a transmission beam;
transmit, to the UE, a reference signal using the transmission beam;
receive, from the UE, an indication of a preferred beam management procedure of a plurality of possible beam management procedures; and
perform a beam management procedure according to the indication of a preferred beam management procedure.
10. The apparatus of claim 9 , wherein the indication of the beam management procedure includes a transmission configuration indicator.
11. The apparatus of claim 9 , wherein the indication of the beam management procedure includes a media access layer (MAC) control element (MAC CE).
12. The apparatus of claim 9 , wherein the indication of the beam management procedure includes a physical uplink control channel (PUCCH) message.
13. The apparatus of claim 9 ,
wherein to communicate with the UE comprises using a first beam pair,
wherein the apparatus is further configured to cause the UE to perform periodic measurements of at least the first beam pair.
14. The apparatus of claim 13 ,
wherein the apparatus is further configured to cause the UE to perform periodic measurements of at least one additional beam pair,
wherein the beam management procedure is based on a comparison of measurements of the first beam pair to measurements of the at least one additional beam pair.
15. A base station, comprising:
at least two antennas;
at least one radio coupled to the antennas; and
a processor coupled to the radio;
wherein the processor is configured to cause the base station to:
communicate with a user equipment device (UE) using a first beam;
transmit, to the UE, an indication of the first beam;
receive, from the UE, an indication of a preferred beam management procedure of a plurality of possible beam management procedures; and
perform a beam management procedure according to the indication of a preferred beam management procedure.
16. The base station of claim 15 , wherein the indication of the preferred beam management procedure includes a media access layer (MAC) control element (MAC CE) in a physical uplink shared channel (PUSCH) message.
17. The base station of claim 15 , wherein the indication of the preferred beam management procedure includes a preamble to a random access channel (RACH) message.
18. The base station of claim 17 , wherein a preamble of the RACH message includes a Zadoff-Chu sequence, wherein the Zadoff-Chu sequence indicates the preferred beam management procedure.
19. The base station of claim 15 , wherein the indication of the preferred beam management procedure includes a transmission configuration indicator.
20. The base station of claim 15 , wherein the indication of the first beam includes a transmission configuration indicator.