Methods for beam control signalling, network nodes and wireless devices
The present disclosure provides a method performed by a network node for beam control signalling. The network node is configured to communicate with a wireless device. The method comprises obtaining a first set of candidate beams from the wireless device for communication with the network node based on beam quality indicators. The method comprises determining a second set of candidate beams based on the first set and a number of beams to be used in the communication with the wireless device. The number of candidate beams of the second set is larger than the number of beams to be used for communication with the wireless device. The method comprises transmitting, to the wireless device, control signalling indicative of the second set of candidate beams.
1. A method, performed by a network node, for beam control signaling, wherein the network node is configured to communicate with a wireless device, the method comprising:
obtaining a first set of candidate beams, from the wireless device, for communication with the network node based on beam quality indicators, the first set of candidate beams based on a hardware capability of the wireless device;
determining a second set of candidate beams based on the first set and a number of beams to be used in the communication with the wireless device, wherein the second set of candidate beams is determined by reducing the first set of candidate beams such that the second set of candidate beams is a proper subset of the first set of candidate beams, the number of candidate beams of the second set is larger than the number of beams to be used for communication with the wireless device; and
transmitting, to the wireless device, control signaling indicative of the second set of candidate beams, wherein the wireless device is configured to select, among the second set of candidate beams, one or more beams for communication with the network node based on a hardware property of the wireless device, the hardware property is indicative of an association between a respective panel and a corresponding physical antenna panel or of power arrangement related to the physical antenna panels, each physical antenna panel comprises one or more panels.
2. The method according to claim 1 , wherein the second set of candidate beams is ordered by prioritizing the candidate beams of the second set.
3. The method according to claim 1 , wherein the second set is determined by filtering the first set based on a prioritization of the candidate beams of the first set.
4. The method according to claim 1 , wherein the second set is determined by filtering the first set based on a system quality metric.
5. The method according to claim 4 , wherein the second set is determined by ordering the first set based on the system quality metric.
6. The method according to claim 1 , wherein the one or more candidate beams of the second set comprise one or more of: a downlink, DL, beam, and an uplink, UL, beam.
7. The method according to claim 1 , wherein the candidate beams from the wireless device for communication with the network node comprise downlink candidate beams of the network node, and
wherein obtaining the first set of candidate beams based on beam quality indicators comprises receiving control signaling indicative of a set of downlink, DL, candidate beams of the network node.
8. The method according to claim 1 , wherein candidate beams for communication with the network node comprise uplink candidate beams, and
wherein obtaining the first set of candidate beams based on beam quality indicators comprises determining a set of uplink, UL, candidate beams based on a UL beam sweeping performed by the wireless device.
9. The method according to claim 1 , the method comprising:
allocating one or more resources for at least one candidate beam of the second set for communication with the wireless device.
10. The method according to claim 9 , the method comprising receiving, using the respective uplink resource, control signaling indicative of the third set of beams selected by the wireless device for communication with the network node.
11. The method according to claim 1 , the method comprising: receiving control signaling indicative of a third set of beams selected by the wireless device for communication with the network node.
12. The method according to claim 11 , the method comprising:
allocating a respective uplink resource for each candidate beam of the second set.
13. A method, performed at a wireless device, for beam control signaling, the wireless device comprising one or more physical antenna panels, wherein each physical antenna panel comprises one or more panels, wherein the wireless device is configured to communicate, with a network node, using one or more beams associated with corresponding one or more panels, the method comprising:
receiving, from the network node, control signaling indicative of a set of candidate beams;
selecting, among the set of candidate beams, one or more beams for communication with the network node based on a hardware property of the wireless device, wherein the hardware property is indicative of an association between a respective panel and a corresponding physical antenna panel and/or of power arrangement related to the physical antenna panels; and
transmitting, to the network node, control signaling indicative of the one or more beams selected by the wireless device for communication with the network node.
14. The method according to claim 13 , wherein the hardware property is indicative of an association between a respective panel and a corresponding physical antenna panel and/or of power arrangement related to the physical antenna panels.
15. The method according to claim 13 , the method comprising:
determining one or more physical antenna panels to deactivate based on the one or more selected beams; and
deactivating the one or more determined physical antenna panels.
16. The method according to claim 13 , wherein receiving, from the network node, control signaling indicative of a set of candidate beams comprising:
receiving, from the network node, one or more control messages comprising one or more identifiers indicative of one or more candidate beams of the set of candidate beams.
17. The method according to claim 16 , wherein the one or more beams for communication with the network node comprise one or more of: a downlink, DL, beam, and an uplink, UL, beam.
18. The method according to claim 13 , wherein selecting, among the set of candidate beams, one or more beams for communication with the network node based on a hardware property of the wireless device comprises selecting, among the set of candidate beams, the one or more beams for communication with the network node based on a relation between UL and DL beams.