IP Library › Granted Patent US 12696259
Granted Patent B2
US 12696259 · App. 18/598,363 · Granted Jul 28, 2026

Group-based beam reporting for multi-receiver operation based on reference signal received power differences

Inventors: Daniel Medina (Munich, DE); Paolo Baracca (Munich, DE); Rafael Cauduro Dias De Paiva (Aalborg, DK)
Assignee: NOKIA TECHNOLOGIES OY
H04W72/046H04B17/328H04L5/0058
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Quick Facts
Patent No.
US 12696259
App. No.
18/598,363
Granted
Jul 28, 2026
Kind
B2
Abstract

An apparatus and method for group-based beam reporting (GBBR) for multi-receiver operation based on reference signal received power (RSRP) differences is provided. The method may include determining, by a first apparatus, a candidate reference signal (RS) group to be provided to at least one second apparatus. The candidate RS group includes at least a first RS and a second RS. The method also includes determining a first difference between a first RSRP of the first RS and a second RSRP of the second RS. The method further includes determining a second difference between a third RSRP of the second RS and a fourth RSRP of the first RS, and performing at least one of excluding the candidate RS group from a group-based beam report based on the first and second differences, or transmitting, to the at least one second apparatus, information indicative of the first and second differences.

Claims (75)

1 . An apparatus comprising:

at least one processor; and

at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:

determining a candidate reference signal group to be provided to at least one other apparatus, wherein the candidate reference signal group comprises at least a first reference signal and a second reference signal;

determining, based on a first receive beam of the apparatus, a first difference between a first reference signal received power of the first reference signal and a second reference signal received power of the second reference signal;

determining, based on a second receive beam of the apparatus, a second difference between a third reference signal received power of the second reference signal and a fourth reference signal received power of the first reference signal;

excluding the candidate reference signal group from a group-based beam report based on the first difference and the second difference;

transmitting, to the at least one other apparatus, information indicative of the first difference and the second difference;

determining, for each candidate receive beam from a first subset of candidate receive beams for receiving a transmission, a respective third difference between a respective third reference signal received power of the first reference signal and a respective fourth reference signal received power of the second reference signal;

determining the third difference as a largest among respective differences corresponding to the candidate receive beams from the first subset;

determining, for each candidate receive beam from a second subset of candidate receive beams for receiving a second transmission, a respective fourth difference between a respective fifth reference signal received power of the second reference signal and a respective sixth reference signal received power of the first reference signal;

determining the second difference as a largest among respective differences corresponding to the candidate receive beams from the second subset, wherein the first and second subset of candidate receive beams are equal to a set of receive beams available at the apparatus; and

transmitting, to the at least one other apparatus, information indicative of the third difference and the fourth difference.

2 . The apparatus according to claim 1 , wherein the instructions, when executed by the at least one processor, further cause the apparatus to:

transmit, to the at least one other apparatus, the group-based beam report comprising the candidate reference signal group.

3 . The apparatus according to claim 2 , the instructions, when executed by the at least one processor, further cause the apparatus to:

determine a plurality of candidate reference signal groups, which includes a candidate reference signal group, wherein each candidate reference signal group of the plurality of candidate reference signal groups comprises at least corresponding first and second reference signals;

determine a corresponding quality metric for each candidate reference signal group of the plurality of candidate reference signal groups; and

transmit the candidate reference signal groups with highest quality metric, up to a configured number of candidate reference signal groups to be reported, in the group-based beam report.

4 . The apparatus according to claim 3 , wherein the instructions, when executed by the at least one processor, further cause the apparatus to:

exclude, from the group-based beam report, one or more candidate reference signal groups of the plurality of candidate reference signal groups for which the corresponding quality metric is below a minimum quality metric threshold.

5 . The apparatus according to claim 4 , wherein the instructions, when executed by the at least one processor, further cause the apparatus to:

determine, for each candidate reference signal in one group of the plurality of candidate reference signal groups, a corresponding difference between a reference signal received power associated with the candidate reference signal and a sum of reference signal received powers associated with all other candidate reference signals in the one group of the plurality of candidate reference signal groups; and

perform the following operations:

excluding the one group from the group-based beam report based on corresponding differences for each candidate reference signal in the one group; and

transmitting, to the at least one other apparatus, information indicative of the corresponding differences for each candidate reference signal in the one group.

6 . A system comprising:

apparatus comprising:

at least one processor; and

at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:

determining a candidate reference signal group to be provided to at least one other apparatus, wherein the candidate reference signal group comprises at least a first reference signal and a second reference signal;

determining, based on a first receive beam of the apparatus, a first difference between a first reference signal received power of the first reference signal and a second reference signal received power of the second reference signal;

determining, based on a second receive beam of the apparatus, a second difference between a third reference signal received power of the second reference signal and a fourth reference signal received power of the first reference signal;

excluding the candidate reference signal group from a group-based beam report based on the first difference and the second difference;

transmitting, to the at least one other apparatus, information indicative of the first difference and the second difference;

determining, for each candidate receive beam from a first subset of candidate receive beams for receiving a transmission, a respective third difference between a respective third reference signal received power of the first reference signal and a respective fourth reference signal received power of the second reference signal;

determining the third difference as a largest among respective differences corresponding to the candidate receive beams from the first subset;

determining, for each candidate receive beam from a second subset of candidate receive beams for receiving a second transmission, a respective fourth difference between a respective fifth reference signal received power of the second reference signal and a respective sixth reference signal received power of the first reference signal;

determining the second difference as a largest among respective differences corresponding to the candidate receive beams from the second subset, wherein the first and second subset of candidate receive beams are equal to a set of receive beams available at the apparatus; and

transmitting, to the at least one other apparatus, information indicative of the third difference and the fourth difference.

7 . The system according to claim 6 , wherein the instructions, when executed by the at least one processor, further cause the apparatus to:

transmit, to the at least one other apparatus, the group-based beam report comprising the candidate reference signal group.

8 . The system according to claim 7 , the instructions, when executed by the at least one processor, further cause the apparatus to:

determine a plurality of candidate reference signal groups, which includes a candidate reference signal group, wherein each candidate reference signal group of the plurality of candidate reference signal groups comprises at least corresponding first and second reference signals;

determine a corresponding quality metric for each candidate reference signal group of the plurality of candidate reference signal groups; and

transmit the candidate reference signal groups with highest quality metric, up to a configured number of candidate reference signal groups to be reported, in the group-based beam report.

9 . The system according to claim 8 , wherein the instructions, when executed by the at least one processor, further cause the apparatus to:

exclude, from the group-based beam report, one or more candidate reference signal groups of the plurality of candidate reference signal groups for which the corresponding quality metric is below a minimum quality metric threshold.

10 . The system according to claim 9 , wherein the instructions, when executed by the at least one processor, further cause the apparatus to:

determine, for each candidate reference signal in one group of the plurality of candidate reference signal groups, a corresponding difference between a reference signal received power associated with the candidate reference signal and a sum of reference signal received powers associated with all other candidate reference signals in the one group of the plurality of candidate reference signal groups; and

perform the following operations:

excluding the one group from the group-based beam report based on corresponding differences for each candidate reference signal in the one group; and

transmitting, to the at least one other apparatus, information indicative of the corresponding differences for each candidate reference signal in the one group.

11 . A method performed by an apparatus, the method comprising:

determining a candidate reference signal group to be provided to at least one other apparatus, wherein the candidate reference signal group comprises at least a first reference signal and a second reference signal;

determining, based on a first receive beam of the apparatus, a first difference between a first reference signal received power of the first reference signal and a second reference signal received power of the second reference signal;

determining, based on a second receive beam of the apparatus, a second difference between a third reference signal received power of the second reference signal and a fourth reference signal received power of the first reference signal;

excluding the candidate reference signal group from a group-based beam report based on the first difference and the second difference;

transmitting, to the at least one other apparatus, information indicative of the first difference and the second difference;

determining, for each candidate receive beam from a first subset of candidate receive beams for receiving a transmission, a respective third difference between a respective third reference signal received power of the first reference signal and a respective fourth reference signal received power of the second reference signal;

determining the third difference as a largest among respective differences corresponding to the candidate receive beams from the first subset;

determining, for each candidate receive beam from a second subset of candidate receive beams for receiving a second transmission, a respective fourth difference between a respective fifth reference signal received power of the second reference signal and a respective sixth reference signal received power of the first reference signal;

determining the second difference as a largest among respective differences corresponding to the candidate receive beams from the second subset, wherein the first and second subset of candidate receive beams are equal to a set of receive beams available at the apparatus; and

transmitting, to the at least one other apparatus, information indicative of the third difference and the fourth difference.

12 . The method according to claim 11 , further comprising transmitting, to the at least one other apparatus, the group-based beam report comprising the candidate reference signal group.

13 . The method according to claim 12 , further comprising:

determining a plurality of candidate reference signal groups, which includes a candidate reference signal group, wherein each candidate reference signal group of the plurality of candidate reference signal groups comprises at least corresponding first and second reference signals;

determining a corresponding quality metric for each candidate reference signal group of the plurality of candidate reference signal groups; and

transmitting the candidate reference signal groups with highest quality metric, up to a configured number of candidate reference signal groups to be reported, in the group-based beam report.

14 . The method according to claim 13 , further comprising excluding, from the group-based beam report, one or more candidate reference signal groups of the plurality of candidate reference signal groups for which the corresponding quality metric is below a minimum quality metric threshold.

15 . The method according to claim 14 , further comprising:

determining, for each candidate reference signal in one group of the plurality of candidate reference signal groups, a corresponding difference between a reference signal received power associated with the candidate reference signal and a sum of reference signal received powers associated with all other candidate reference signals in the one group of the plurality of candidate reference signal groups; and

performing the following operations:

excluding the one group from the group-based beam report based on corresponding differences for each candidate reference signal in the one group; and

transmitting, to the at least one other apparatus, information indicative of the corresponding differences for each candidate reference signal in the one group.