Methods for beam suppression at a wireless device, related network nodes and related wireless devices
A method is disclosed, performed by a network node, for beam suppression at a wireless device. The wireless device is configured to communicate with the network node. The method comprises transmitting, to the wireless device, reference signals for channel estimation of a set of beams. The method comprises communicating, between the network node and the wireless device, control signaling indicative of beam suppression of at least one beam of a first subset of beams suppressible by the wireless device.
1. A method, performed by a network node, for beam interference mitigation at a wireless device configured to communicate with the network node, the method comprising:
transmitting, to the wireless device, reference signals for channel estimation of a set of beams;
transmitting control signaling to the wireless device, wherein the transmitted control signaling is indicative of beam suppression of at least one beam of a first subset of beams suppressible by the wireless device, the beam suppression attenuating interference of the at least one beam; and
transmitting, to the wireless device, an indication that the network node does not support assisting the beam suppression at the wireless device.
2. The method according to claim 1 , wherein the transmitting the control signaling comprises:
transmitting, to the wireless device, an indication that beam suppression is to be applied by the wireless device to at least one beam of the first subset.
3. The method according to claim 1 , further comprising receiving, from the wireless device, a channel state report indicative of a second subset of the set of beams.
4. The method according to claim 3 , wherein the first subset is a subset of the second subset of beams.
5. The method according to claim 1 , further comprising transmitting, to the wireless device, control signaling indicative of a resource for pilot signals for beam-suppression management on the first subset of beams.
6. The method according to claim 5 , wherein the pilot signals are precoded according to one or more precoding filters for one or more other wireless devices or nonprecoded.
7. The method according to claim 1 , wherein the transmitting the control signaling comprises:
transmitting, to the wireless device, an indication of at least one beam index of the first subset of beams that are to be suppressed by the wireless device.
8. The method according to claim 1 , further comprising:
determining the first subset of beams based on a quality parameter of the beams indicated in a channel state report indicative of a second subset of the set of beams.
9. The method according to claim 1 , further comprising:
receiving, from the wireless device, control signaling indicative of a beam suppression capability of the wireless device.
10. The method according to claim 9 , wherein the beam suppression capability comprises an indication of a number of beams of a second subset of beams that the wireless device is capable of suppressing, wherein the first subset is a subset of the second subset of beams.
11. The method according to claim 1 , further comprising:
transmitting, to the wireless device, an indication of a number of beams out of the set of beams for channel state reports from the wireless device.
12. A method, performed by a wireless device, for beam interference mitigation at the wireless device configured to communicate with a network node, the method comprising:
receiving, from the network node, reference signals for channel estimation of a set of beams;
receiving, from the network node, control signaling indicative of beam suppression of at least one beam of a first subset of beams suppressible by the wireless device, the beam suppression attenuating interference of the at least one beam; and
receiving, from the network node, an indication that the network node does not assist beam suppression.
13. The method according to claim 12 , further comprising:
transmitting, to the network node, a channel state report indicative of a second subset of the set of beams.
14. The method according to claim 13 , wherein the first subset is a subset of the second subset of beams.
15. The method according to claim 12 , further comprising:
applying beam suppression for subsequent channel state reports based on the control signaling.
16. The method according to claim 12 , further comprising:
transmitting, to the network node, control signaling indicative of a beam suppression capability of the wireless device.
17. The method according to claim 16 , wherein the beam suppression capability comprises an indication of a number of beams of a second subset of beams that the wireless device is capable of suppressing, wherein the first subset is a subset of the second subset of beams.
18. The method according to claim 12 , wherein the receiving the control signaling comprises:
receiving, from the network node, an indication that beam suppression is to be applied by the wireless device to at least one beam of the first subset.