IP Library › Granted Patent US 12701448
Granted Patent B2
US 12701448 · App. 18/185,940 · Granted Aug 4, 2026

Measurement reporting using a lookup table

Inventors: Hua Wang (Basking Ridge, NJ); Tao Luo (San Diego, CA); Taesang Yoo (San Diego, CA); Junyi Li (Fairless Hills, PA)
Assignee: QUALCOMM Incorporated
H04W24/10H04B17/328H04B17/336
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Quick Facts
Patent No.
US 12701448
App. No.
18/185,940
Granted
Aug 4, 2026
Kind
B2
Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a reference signal associated with a beam management. The UE may perform a layer 1 (L1) reference signal received power (RSRP) or an L1 signal-to-interference-plus-noise ratio (SINR) (RSRP/SINR) measurement based at least in part on the reference signal. The UE may determine, based at least in part on a search of a lookup table (LUT), an entry in the LUT that corresponds to the L1 RSRP/SINR measurement. The UE may transmit, to the network node, an L1 RSRP/SINR measurement report that indicates the entry in the LUT. Numerous other aspects are described.

Claims (97)

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

a memory; and

one or more processors, coupled to the memory, configured to:

receive, from a network node, a lookup table (LUT) and a reference signal associated with a beam management, wherein the LUT includes a plurality of entries corresponding to layer 1 (L1) reference signal received power (RSRP) or L1 signal-to-interference-plus-noise ratio (SINR) (RSRP/SINR) measurements;

perform a L1 RSRP/SINR measurement based at least in part on the reference signal;

determine, based at least in part on a search of the LUT, an entry in the LUT that corresponds to the L1 RSRP/SINR measurement; and

transmit, to the network node, an L1 RSRP/SINR measurement report that indicates the entry in the LUT.

2 . The apparatus of claim 1 ,

wherein the entry in the LUT that corresponds to the L1 RSRP/SINR measurement is a closest entry in the LUT that corresponds to the L1 RSRP/SINR measurement.

3 . The apparatus of claim 1 ,

wherein the LUT is a UE-specific LUT, or the LUT is a common LUT shared by a plurality of UEs.

4 . The apparatus of claim 1 ,

wherein the one or more processors are further configured to:

store the LUT in a memory of the UE, wherein the LUT is an ordered LUT based at least in part on a natural order of bitstreams stored in the LUT.

5 . The apparatus of claim 1 ,

wherein the entry in the LUT corresponds to one or more of a beam index associated with the L1 RSRP/SINR measurement or an RSRP/SINR value associated with the L1 RSRP/SINR measurement.

6 . The apparatus of claim 1 ,

wherein the LUT includes a first LUT and a second LUT, wherein the first LUT includes beam indexes associated with L1 RSRP/SINR measurements, and wherein the second LUT includes RSRP/SINR values associated with L1 RSRP/SINR measurements.

7 . The apparatus of claim 1 ,

wherein the LUT is a single LUT that includes beam indexes and RSRP/SINR values associated with L1 RSRP/SINR measurements.

8 . The apparatus of claim 1 ,

wherein the L1 RSRP/SINR measurement is a first L1 RSRP/SINR measurement, and wherein the one or more processors are further configured to:

perform a second L1 RSRP/SINR measurement;

determine, based at least in part on an additional search of the LUT, that no entry in the LUT corresponds to the second L1 RSRP/SINR measurement; and

transmit, to the network node, an indication of the second L1 RSRP/SINR measurement, or an indication of one or more of a beam index or an RSRP/SINR value, associated with the second L1 RSRP/SINR measurement, that are not currently in the LUT.

9 . The apparatus of claim 1 ,

wherein the LUT is an initial LUT, and wherein the one or more processors are further configured to:

transmit, to the network node, UE feedback;

receive, from the network node and based at least in part on the UE feedback, an updated LUT, wherein the updated LUT includes new entries for one or more of beam indexes or RSRP/SINR values, wherein entries in the initial LUT are deleted in the updated LUT, and wherein the updated LUT is associated with a version number; and

delete the initial LUT.

10 . The apparatus of claim 1 ,

wherein the one or more processors are further configured to:

transmit, to the network node, UE feedback;

receive, from the network node and based at least in part on the UE feedback, an indication of one or more entries to be inserted into the LUT or deleted from the LUT; and

update the LUT based at least in part on the indication received from the network node.

11 . The apparatus of claim 1 ,

wherein the entry in the LUT is associated with a counter indicating a quantity of times that the entry has been reported, wherein the entry in the LUT is associated with a timestamp indicating a time that the entry was last reported, and wherein the entry is kept in the LUT or deleted from the LUT based at least in part on the counter and the timestamp.

12 . The apparatus of claim 1 ,

wherein the one or more processors are further configured to:

receive, from the network node, an L1 RSRP/SINR configuration message; and

download, from the network node, the LUT based at least in part on the L1 RSRP/SINR configuration message,

wherein the L1 RSRP/SINR measurement report that indicates the entry in the LUT is transmitted based at least in part on the L1 RSRP/SINR configuration message.

13 . The apparatus of claim 1 ,

wherein the LUT is an initial LUT, and wherein the one or more processors are further configured to:

receive, from the network node, a broadcast message that indicates that a new LUT is available, wherein the broadcast message indicates a version number associated with the new LUT;

determine that the initial LUT is associated with a previous version as compared to the new LUT;

transmit, to the network node, a request for the new LUT;

receive, from the network node, the new LUT based at least in part on the request; and

replace the initial LUT with the new LUT.

14 . The apparatus of claim 1 ,

wherein the L1 RSRP/SINR measurement report includes one bit to indicate an L1 RSRP/SINR reporting format, and wherein the L1 RSRP/SINR reporting format indicates whether the L1 RSRP/SINR measurement report is a LUT-based report or a non-LUT-based report.

15 . An apparatus for wireless communication at a network node, comprising:

a memory; and

one or more processors, coupled to the memory, configured to:

transmit, to a user equipment (UE), a lookup table (LUT) and a reference signal associated with a beam management, wherein the LUT includes a plurality of entries corresponding to layer 1 (L1) reference signal received power (RSRP) or L1 signal-to-interference-plus-noise ratio (SINR) (RSRP/SINR) measurements; and

receive, from the UE, a L1 RSRP/SINR measurement report based at least in part on the reference signal, wherein the L1 RSRP/SINR measurement report indicates an entry in the LUT that corresponds to an L1 RSRP/SINR measurement.

16 . The apparatus of claim 15 ,

wherein the entry in the LUT that corresponds to the L1 RSRP/SINR measurement is a closest entry in the LUT that corresponds to the L1 RSRP/SINR measurement.

17 . The apparatus of claim 15 ,

wherein the LUT is a UE-specific LUT, or the LUT is a common LUT shared by a plurality of UEs.

18 . The apparatus of claim 15 ,

wherein the one or more processors are further configured to:

store the LUT locally stored by both the network node and the UE.

19 . The apparatus of claim 15 ,

wherein the entry in the LUT corresponds to one or more of a beam index associated with the L1 RSRP/SINR measurement or an RSRP/SINR value associated with the L1 RSRP/SINR measurement.

20 . The apparatus of claim 15 ,

wherein the LUT includes a first LUT and a second LUT, wherein the first LUT includes beam indexes associated with L1 RSRP/SINR measurements, and wherein the second LUT includes RSRP/SINR values associated with L1 RSRP/SINR measurements.

21 . The apparatus of claim 15 ,

wherein the LUT is a single LUT that includes beam indexes and RSRP/SINR values associated with L1 RSRP/SINR measurements.

22 . The apparatus of claim 15 ,

wherein the L1 RSRP/SINR measurement is a first L1 RSRP/SINR measurement, and wherein the one or more processors are further configured to:

receive, from the UE, an indication of a second L1 RSRP/SINR measurement, or an indication of one or more of a beam index or an RSRP/SINR value, associated with the second L1 RSRP/SINR measurement, that are not currently in the LUT.

23 . The apparatus of claim 15 ,

wherein the LUT is an initial LUT, and wherein the one or more processors are further configured to:

receive, from the UE, UE feedback; and

transmit, to the UE and based at least in part on the UE feedback, an updated LUT, wherein the updated LUT includes new entries for one or more of beam indexes or RSRP/SINR values, wherein entries in the initial LUT are deleted in the updated LUT, and wherein the updated LUT is associated with a version number.

24 . The apparatus of claim 15 ,

wherein the one or more processors are further configured to:

receive, from the UE, UE feedback; and

transmit, to the UE and based at least in part on the UE feedback, an indication of one or more entries to be inserted into the LUT or deleted from the LUT.

25 . The apparatus of claim 15 ,

wherein the entry in the LUT is associated with a counter indicating a quantity of times that the entry has been reported, wherein the entry in the LUT is associated with a timestamp indicating a time that the entry was last reported, and wherein the entry is kept in the LUT or deleted from the LUT based at least in part on the counter and the timestamp.

26 . The apparatus of claim 15 ,

wherein the one or more processors are further configured to:

transmit, to the UE, an L1 RSRP/SINR configuration message that configures the UE to download the LUT and transmit the L1 RSRP/SINR measurement report.

27 . The apparatus of claim 15 ,

wherein the L1 RSRP/SINR measurement report includes one bit to indicate an L1 RSRP/SINR reporting format, and wherein the L1 RSRP/SINR reporting format indicates whether the L1 RSRP/SINR measurement report is a LUT-based report or a non-LUT-based report.

28 . A method of wireless communication performed by a user equipment (UE), comprising:

receiving, from a network node, a lookup table (LUT) and a reference signal associated with a beam management, wherein the LUT includes a plurality of entries corresponding to layer 1 (L1) reference signal received power (RSRP) or L1 signal-to-interference-plus-noise ratio (SINR) (RSRP/SINR) measurements;

performing a L1 RSRP/SINR measurement based at least in part on the reference signal;

determining, based at least in part on a search of the LUT, an entry in the LUT that corresponds to the L1 RSRP/SINR measurement; and

transmitting, to the network node, an L1 RSRP/SINR measurement report that indicates the entry in the LUT.

29 . A method of wireless communication performed by a network node, comprising:

transmitting, to a user equipment (UE), a lookup table (LUT) and a reference signal associated with a beam management, wherein the LUT includes a plurality of entries corresponding to layer 1 (L1) reference signal received power (RSRP) or L1 signal-to-interference-plus-noise ratio (SINR) (RSRP/SINR) measurements; and

receiving, from the UE, a L1 RSRP/SINR measurement report based at least in part on the reference signal, wherein the L1 RSRP/SINR measurement report indicates an entry in the LUT that corresponds to an L1 RSRP/SINR measurement.

30 . The apparatus of claim 1 ,

wherein the LUT is locally stored at the UE and is locally stored at the network node.