Beam management in a communications network

1. A method for beam management, the method being performed by a radio transceiver device, the method comprising:

performing a beam management procedure to discover or maintain a beam pair link by simultaneously transmitting a first reference signal in a first set of beams and a second reference signal in a second set of beams,

wherein the beam management procedure comprises:

sequentially sweeping through beams of the first set of beams while transmitting the first reference signal in the first set of beams; and

sequentially sweeping through beams of the second set of beams while transmitting the second reference signal in the second set of beams,

wherein the first set of beams is transmitted at a first antenna array of the radio transceiver device and in a first polarization, and

wherein the second set of beams is transmitted at a second antenna array of the radio transceiver device and in a second polarization.

2. The method of claim 1 , wherein performing the beam management procedure to discover or maintain the beam pair link comprises:

simultaneously transmitting the first reference signal in the first set of beams and the second reference signal in the second set of beams;

determining a first measurement based on the first reference signal and a second measurement based on the second reference signal; and

determining the beam pair link based on the first measurement and the second measurement.

3. The method of claim 1 , wherein a first burst of occurrences of the first reference signal is transmitted per beam in the first set of beams, and

wherein a second burst of occurrences of the second reference signal is transmitted per beam in the second set of beams.

4. The method of claim 1 , wherein each of the first reference signal and the second reference signal are transmitted at a respective antenna port of the radio transceiver device.

5. The method of claim 1 , wherein the first polarization and the second polarization are mutually orthogonal.

6. The method of claim 1 , wherein the first antenna array and the second antenna array belong to mutually different panels.

7. The method of claim 1 , wherein the radio transceiver device has at least three antenna arrays, and wherein the reference signals are transmitted at those two of the at least three antenna arrays having lowest mutual correlation.

8. The method of claim 1 , further comprising receiving a report of channel state information (“CSI”) pertaining to at least one of: a channel quality indicator (“CQI”), rank indicator (“RI”), precoder matrix indicator (“PMI”), channel state information reference signal resource indicator (“CRI”), and reference signal received power (“RSRP”) from a second radio transceiver device, the report being based on the first reference signal and the second reference signal as transmitted towards the second radio transceiver device.

9. The method of claim 8 , further comprising:

transmitting at least one of data and control signaling towards the second radio transceiver device,

wherein the signaling is transmitted using a first beam of the first set of beams and a second beam of the second set of beams, and

wherein which beam in the first set of beams to select as the first beam and which of beam in the second set of beams to select as the second beam is based on the report.

10. The method of claim 4 , wherein the at least one of data and control signaling is transmitted using the respective antenna port.

11. The method of claim 1 , wherein the reference signals are channel state information reference signals (“CSI-RS”) sounding reference signals (“SRS”) sidelink channel state information reference signals (“SCSI-RS”) or synchronization signal block (“SSB”) signals.

12. The method of claim 8 , wherein the first set of beams and the second set of beams are each in a direction of the second radio transceiver device.

13. The method of claim 8 , wherein the radio transceiver device is a user equipment, UE, and the second radio transceiver device is a radio access network, RAN, node.

14. The method of claim 8 , wherein the radio transceiver device is a radio access network, RAN, node, and the second radio transceiver device is a user equipment, UE.

15. A radio transceiver device for beam management, the radio transceiver device comprising:

a first antenna array;

a second antenna array;

processing circuitry; and

memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the radio transceiver device to perform operations, the operations comprising:

performing a beam management procedure to discover or maintain a beam pair link by simultaneously transmitting a first reference signal in a first set of beams and a second reference signal in a second set of beams,

wherein the beam management procedure comprises:

sequentially sweeping through beams of the first set of beams while transmitting the first reference signal in the first set of beams; and

sequentially sweeping through beams of the second set of beams while transmitting the second reference signal in the second set of beams,

wherein the first set of beams is transmitted at the first antenna array of the radio transceiver device and in a first polarization, and

wherein the second set of beams is transmitted at the second antenna array of the radio transceiver device and in a second polarization.

16. The radio transceiver of claim 15 , wherein performing the beam management procedure to discover or maintain the beam pair link comprises:

simultaneously transmitting the first reference signal in the first set of beams and the second reference signal in the second set of beams;

determining a first measurement based on the first reference signal and a second measurement based on the second reference signal; and

determining the beam pair link based on the first measurement and the second measurement.

17. The radio transceiver device of claim 15 , wherein a first burst of occurrences of the first reference signal is transmitted per beam in the first set of beams, and

wherein a second burst of occurrences of the second reference signal is transmitted per beam in the second set of beams.

18. The radio transceiver device of claim 15 , wherein each of the first reference signal and the second reference signal are transmitted at a respective antenna port of the radio transceiver device.

19. The radio transceiver device of claim 15 , wherein the first polarization and the second polarization are mutually orthogonal.

20. A non-transitory computer-readable medium having instructions stored therein that are executable by processing circuitry of a radio transceiver device to cause the radio transceiver device to perform operations, the operations comprising:

performing a beam management procedure to discover or maintain a beam pair link by simultaneously transmitting a first reference signal in a first set of beams and a second reference signal in a second set of beams,

wherein the beam management procedure comprises:

sequentially sweeping through beams of the first set of beams while transmitting the first reference signal in the first set of beams; and

sequentially sweeping through beams of the second set of beams while transmitting the second reference signal in the second set of beams,

wherein the first set of beams is transmitted at a first antenna array of the radio transceiver device and in a first polarization, and

wherein the second set of beams is transmitted at a second antenna array of the radio transceiver device and in a second polarization.

21. The non-transitory computer-readable medium of claim 20 , wherein performing the beam management procedure to discover or maintain the beam pair link comprises:

simultaneously transmitting the first reference signal in the first set of beams and the second reference signal in the second set of beams;

determining a first measurement based on the first reference signal and a second measurement based on the second reference signal; and

determining the beam pair link based on the first measurement and the second measurement.