Beam related tracking reference signal availability signaling
According to some embodiments, a method performed by a wireless device comprises obtaining ( 512 ) a tracking reference signal (TRS)/channel state information reference signal (CSI-RS) resource configuration and underlying beam association for a plurality of TRS/CSI-RS occasions and obtaining ( 514 ) an availability indicator. The availability indicator indicates an association of one or more of the plurality of TRS/CSI-RS occasions and underlying beam association. The method further comprises receiving ( 518 ) layer one signaling on a beam. The layer one signaling indicates that a TRS/CSI-RS is available in at least one TRS/CSI-RS occasion of the plurality of TRS/CSI-RS occasions. The method further comprises determining ( 520 ) one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available based on the availability indicator and the layer one signaling and receiving ( 522 ) TRS/CSI-RS in at least one of the determined TRS/CSI-RS occasions.
1 . A method performed by a wireless device, the method comprising:
obtaining a tracking reference signal (TRS)/channel state information reference signal (CSI-RS) resource configuration, the TRS/CSI-RS resource configuration comprising an indication of a plurality of TRS/CSI-RS occasions available to the wireless device;
receiving layer one signaling on a beam, the layer one signaling indicating that a TRS/CSI-RS is available in at least one TRS/CSI-RS occasion of the plurality of TRS/CSI-RS occasions;
obtaining an availability indicator that indicates to which beam or beams the layer one signaling applies;
determining one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available on one or more beams based on the availability indicator and the layer one signaling; and
receiving TRS/CSI-RS in at least one of the determined TRS/CSI-RS occasions, wherein the availability indicator associates a TRS/CSI-RS occasion with an individual beam, and determining one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available comprises determining TRS/CSI-RS is available in the TRS/CSI-RS occasions indicated by the layer one signaling in the beam on which the layer one signaling is received.
2 . The method of claim 1 , wherein the availability indicator associates a TRS/CSI-RS occasion with all beams, and determining one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available comprises determining TRS/CSI-RS is available in the TRS/CSI-RS occasions indicated by the layer one signaling in all beams.
3 . The method of claim 1 , wherein the availability indicator associates a TRS/CSI-RS occasion with a group of beams, and determining one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available comprises determining TRS/CSI-RS is available in the TRS/CSI-RS occasions indicated by the layer one signaling in all beams of the group of beams.
4 . The method of claim 3 , further comprising obtaining an indication associating a subset of beams into a group of beams.
5 . The method of claim 1 , wherein the layer one signaling indicating that a TRS/CSI-RS is available comprises an availability bitmap.
6 . A wireless device comprising:
processing circuitry operable to:
obtain a tracking reference signal (TRS)/channel state information reference signal (CSI-RS) resource configuration, the TRS/CSI-RS resource configuration comprising an indication of a plurality of TRS/CSI-RS occasions available to the wireless device;
receive layer one signaling on a beam, the layer one signaling indicating that a TRS/CSI-RS is available in at least one TRS/CSI-RS occasion of the plurality of TRS/CSI-RS occasions;
obtain an availability indicator that indicates to which beam or beams the layer one signaling applies;
determine one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available on one or more beams based on the availability indicator and the layer one signaling; and
receive TRS/CSI-RS in at least one of the determined TRS/CSI-RS occasions, wherein the availability indicator associates a TRS/CSI-RS occasion with an individual beam, and the processing circuitry is operable to determine one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available by determining TRS/CSI-RS is available in the TRS/CSI-RS occasions indicated by the layer one signaling in the beam on which the layer one signaling is received.
7 . The wireless device of claim 6 , wherein the availability indicator associates a TRS/CSI-RS occasion with all beams, and the processing circuitry is operable to determine one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available by determining TRS/CSI-RS is available in the TRS/CSI-RS occasions indicated by the layer one signaling in all beams.
8 . The wireless device of claim 6 , wherein the availability indicator associates a TRS/CSI-RS occasion with a group of beams, and the processing circuitry is operable to determine one or more of the plurality of TRS/CSI-RS occasions have TRS/CSI-RS available by determining TRS/CSI-RS is available in the TRS/CSI-RS occasions indicated by the layer one signaling in all beams of the group of beams.
9 . The wireless device of claim 8 , the processing circuitry further operable to obtain an indication associating a subset of beams into a group of beams.
10 . The wireless device of claim 6 , wherein the layer one signaling indicating that a TRS/CSI-RS is available comprises an availability bitmap.
11 . A method performed by a network node, the method comprising:
transmitting a tracking reference signal (TRS)/channel state information reference signal (CSI-RS) resource configuration to a wireless device, the TRS/CSI-RS resource configuration comprising an indication of a plurality of TRS/CSI-RS occasions available to the wireless device;
transmitting layer one signaling to the wireless device on a beam, the layer one signaling indicating that a TRS/CSI-RS is available in at least one TRS/CSI-RS occasion of the plurality of TRS/CSI-RS occasions; and
transmitting an availability indicator to the wireless device, wherein the availability indicator indicates to which beam or beams the layer one signaling applies, wherein the availability indicator indicates that the layer one signaling applies to the beam on which the layer one signaling is transmitted.
12 . The method of claim 11 , wherein the availability indicator indicates that the layer one signaling applies to all beams.
13 . The method of claim 11 , further comprising transmitting an indication associating a subset of beams into a group of beams.
14 . The method of claim 11 , wherein the layer one signaling indicating that a TRS/CSI-RS is available comprises an availability bitmap.
15 . A network node comprising:
processing circuitry operable to:
transmit a tracking reference signal (TRS)/channel state information reference signal (CSI-RS) resource configuration to a wireless device, the TRS/CSI-RS resource configuration comprising an indication of a plurality of TRS/CSI-RS occasions available to the wireless device;
transmit layer one signaling to the wireless device on a beam, the layer one signaling indicating that a TRS/CSI-RS is available in at least one TRS/CSI-RS occasion of the plurality of TRS/CSI-RS occasions; and
transmit an availability indicator to the wireless device, wherein the availability indicator indicates to which beam or beams the layer one signaling applies, wherein the availability indicator indicates that the layer one signaling applies to the beam on which the layer one signaling is transmitted.
16 . The network node of claim 15 , wherein the availability indicator indicates that the layer one signaling applies to all beams.
17 . The network node of claim 15 , the processing circuitry further operable to transmit an indication associating a subset of beams into a group of beams.
18 . The network node of claim 15 , wherein the layer one signaling indicating that a TRS/CSI-RS is available comprises an availability bitmap.