Beam group reporting for multi-TRP operation

1 . An apparatus comprising:

at least one processor; and

at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:

receive configuration information to configure the apparatus to report information for beam grouping on measurements on at least one group of channel measurement resources (CMRs);

select the at least one group of CMRs from a plurality of groups of CMRs, the selection based on at least one rule provided by the configuration information, wherein the at least one rule comprises ranking the plurality of groups of CMRs in order to determine which of the plurality of groups of CMRs to select as the at least one group of CMRs, and wherein all CMRs of each respective group of CMRs of the plurality of groups of CMRs are received simultaneously; and

report, to a network, information regarding the selected at least one group of CMRs for the beam grouping.

2 . The apparatus of claim 1 , wherein the ranking is based at least in part on one or more of the following:

an absolute beam group difference values of CMRs, an aggregated mutual information of CMRs, a number of needed receive antenna panel switches being minimized to be less or equal to a threshold maximum number of antenna panel switches or less than or equal to a threshold latency constraint value, or a combination thereof.

3 . The apparatus of claim 1 , wherein the at least rule comprises determining, for the plurality of groups of CMRs, whether a beam group difference value is within a threshold dynamic range value.

4 . The apparatus of claim 1 , wherein the at least rule comprises determining, for the plurality of groups of CMRs, whether signal-to-interference-plus-noise values for each of the plurality of groups of CMRs are above a signal-to-interference-plus-noise threshold value.

5 . The apparatus of claim 1 , wherein the information for the beam grouping comprises assistance information for the network.

6 . The apparatus of claim 1 , wherein the report is triggered by a request from the network.

7 . The apparatus of claim 1 , wherein the report is triggered by the apparatus based on one or more conditions, and/or wherein the one or more conditions are provided to the apparatus by the network and/or are preconfigured at the apparatus.

8 . The apparatus of claim 7 , wherein the configuration information includes one or more of the following: information regarding a measurement window for the plurality of groups of CMRs, an identification of CMRs of at least one group of CMRs, the one or more conditions, and the at least one rule.

9 . The apparatus of claim 8 , wherein the one or more conditions include one or more of the following: a largest absolute beam group difference value associated with the measurement window, a quantity of simultaneously received CMRs for a group of CMRs, and a largest interference power including an interference resource identifier.

10 . The apparatus of claim 8 , wherein the one or more conditions include a third condition, wherein the third condition comprises a measured linear average power value of interference measurement resource associated with the measurement window being larger than a preconfigured interference power threshold, and wherein in response to the third condition being satisfied, the report for the selected at least one group includes at least one resource index.

11 . The apparatus of claim 7 , wherein the one or more conditions include a first condition, wherein the first condition comprises a measured linear average signal-to-interference-plus-noise or a measured linear average reference signal received power being smaller than a preconfigured signal-to-interference-plus-noise threshold value or reference signal received power threshold value, and wherein in response to the first condition being satisfied, the report for the selected at least one group of CMRs includes a transmit power boost for CMRs of the selected at least one group of CMRs.

12 . The apparatus of claim 7 , wherein the one or more conditions include a second condition, wherein the second condition comprises a measured linear average value of an absolute beam group difference, between a maximum and a minimum of signal-to-interference-plus-noise or reference signal received power, being larger than a preconfigured maximum allowable dynamic range, and wherein in response to the second condition being satisfied, the report for the selected at least one group includes a quantized dynamic range increase value.

13 . A method comprising:

receiving, at a user equipment (UE), configuration information to configure the UE to report information for beam grouping on measurements on at least one group of channel measurement resources (CMRs);

selecting, by the UE, the at least one group of CMRs from a plurality of groups of CMRs, the selecting based on at least one rule provided by the configuration information, wherein the at least one rule comprises ranking the plurality of groups of CMRs in order to determine which of the plurality of groups of CMRs to select as the at least one group of CMRs, and wherein all CMRs of each respective group of CMRs of the plurality of groups of CMRs are received simultaneously; and

reporting, to a network, information regarding the selected at least one group of CMRs for the beam grouping.

14 . The method of claim 13 , wherein the ranking is based at least in part on one or more of the following:

an absolute beam group difference values of CMRs, an aggregated mutual information of CMRs, a number of needed receive antenna panel switches being minimized to be less or equal to a threshold maximum number of antenna panel switches or less than or equal to a threshold latency constraint value, or a combination thereof.

15 . The method of claim 13 , wherein the at least rule comprises determining, for the plurality of groups of CMRs, whether a beam group difference value is within a threshold dynamic range value.

16 . The method of claim 13 , wherein the at least rule comprises determining, for the plurality of groups of CMRs, whether signal-to-interference-plus-noise values for each of the plurality of groups of CMRs are above a signal-to-interference-plus-noise threshold value.

17 . The method of claim 13 , wherein the information for the beam grouping comprises assistance information for the network.

18 . An apparatus comprising:

at least one processor; and

at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:

send, to a user equipment (UE), configuration information to configure the UE to report information for beam grouping on measurements on at least one group of CMRs, wherein the configuration information provides at least one rule to enable the UE to select the at least one group of CMRs, wherein the at least one rule comprises ranking a plurality of groups of CMRs in order to determine which of the plurality of groups of CMRs to select as the at least one group of CMRs, and wherein all CMRs of each respective group of CMRs of the plurality of groups of CMRs are transmitted simultaneously; and

receive, from the UE, information regarding the at least one group of CMRs selected, by the UE, based on the configuration information including the at least one rule.