# US 12,114,194 B2 · Method and apparatus for measurement and reporting for multi-beam operations

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- Number: US 12,114,194 B2
- Document ID: US12114194B2
- Status: Granted
- Kind: B2
- Application number: 17/148,467
- Filed: 2021-01-13
- Published: 2022-02-17
- Granted: 2024-10-08
- Earliest claimed: 2020-08-14
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Gilwon Lee; Jeongho Jeon; Joonyoung Cho; Md. Saifur Rahman
- Web page: https://patentgrep.com/patent/US12114194B2

## CPC

- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04B 7/0408: using two or more beams, i.e. beam diversity
- H04B 7/06956: {using a selection of antenna panels}
- H04B 7/06964: {Re-selection of one or more beams after beam failure}
- H04B 7/088: {using beam selection}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 41/0668: by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A user equipment (UE) is configured to perform a method for measuring and reporting multi-beam operations. The UE includes a transceiver configured to communicate via a multi-beam operation with a base station. The UE further includes a processor operably connected to the transceiver. The processor is configured to at least one of: transmit, via the transceiver through a first set of antenna ports, one or more uplink (UL) reference signals (RSs), or receive, via the transceiver, one of: one or more downlink (DL) RSs transmitted by a base station (BS), or the one or more transmitted UL RSs, measure, via the transceiver using a second set of antenna ports, signal qualities of the one or more UL RSs and the one or more DL RSs for a time period, and perform measurement reporting of the measured signal qualities.

## Claims

### Claim 1

A user equipment (UE) comprising:
a transceiver configured to communicate via a multi-beam operation with a base station; and
a processor operably coupled to the transceiver, the processor configured to:
transmit, via the transceiver through a first set of antenna ports corresponding to a first antenna panel, one or more uplink (UL) reference signals (RSs),
measure, via the transceiver using a second set of antenna ports corresponding to a second antenna panel, signal qualities of the one or more UL RSs for a time period, and
perform measurement reporting of the measured signal qualities, wherein the measurement reporting comprises:
a number (L) of smallest or largest reference signal received powers (RSRPs) of the one or more UL RSs, and
corresponding RS indices, where 1≤L<N, and N is a number of the one or more UL RSs transmitted, and
wherein the one or more UL RSs are transmitted via a repetition mode at the first set of antenna ports and measured via a beam-sweep mode at the second set of antenna ports, the repetition mode comprising repeatedly transmitting a same UL RS using same UL resources and the beam-sweep mode comprising using different beams.

### Claim 2 (depends on 1)

The UE of claim 1, wherein:
the measurement reporting further comprises reference signal received quality/signal to interference and noise ratio (RSRQ/SINR) of RSs, and
the corresponding RS indices are one of synchronization signal block resource indicators (SSB-RIs), sounding resource indicators (SRIs) and channel state information reference signal resource indicators (CRIs).

### Claim 3 (depends on 1)

The UE of claim 1, wherein the processor is configured to:
measure block error rates (BLERs) or reference signal received powers (RSRPs) of the one or more UL RSs at the first set of antenna ports;
transmit, via the transceiver, the one or more UL RSs at the second set of antenna ports; and
measure RSRPs of the one or more UL RS, transmitted from the second set of antenna ports, at the first set of antenna ports.

### Claim 4 (depends on 1)

The UE of claim 1, wherein to measure the signal qualities, the processor is further configured to:
measure a self-interference leakage by transmitting UL RSs, at the first set of antenna ports, corresponding to candidate beam RSs and measuring the UL RSs at the second set of antenna ports;
measure a signal to interference and noise ratio;
perform a beam failure detection; and
compute a block error rate (BLER) or bit error rate (BER) at the first set of antenna ports while transmitting the one or more UL RSs or UL data signals at the second set of antenna ports.

### Claim 5 (depends on 4)

The UE of claim 4, wherein to perform the measurement reporting, the processor is further configured to:
evaluate whether the computed BLER exceeds a threshold;
declare a beam failure event based at least in part on the computed BLER;
identify a new beam qnew as a function of SINR equals or exceeds a second threshold and/or SIleakage is less than or equal to a third threshold; and
transmit, via the transceiver, a beam failure recovery request (BFRQ) for the beam failure event at the first set of antenna ports through the second set of antenna ports, wherein to transmit the BFRQ,
the transceiver is further configured to:
transmit a scheduling request (SR) to BS through the second set of antenna ports to report the beam failure event happens, where SR is configured based on PUCCH format 0, PUCCH format 1, or other PUCCH formats; and
in response to an UL transmission being granted at the second set of antenna ports, report, through the second set of antenna ports, information on candidate beams in qnew can be reported.

### Claim 6 (depends on 1)

The UE of claim 1, wherein the processor is configured to:
perform measurements of beamFailureResources q0 and candidateBeamRS q1 for the first set of antenna ports;
identify candidate beam RS(s)×Eq1 such that SINRx>SINRy and SIleakage,x≤SIleakage,y, where for any y∈q0, wherein q1 is a candidateBeamRS and q0 is failure DetectionResources; or
evaluate whether radio link quality of q1 becomes better than that of q0 or not for the first set of antenna ports; and
in response to identifying a radio link quality of the beam link corresponding to q1 being better than that of q0 for the first set of antenna ports, transmit, via the transceiver, a reference signal received quality (RLRQ) for the first set of antenna ports through a current beam link at the second set of antenna ports.

### Claim 7

A method comprising:
transmitting, via a transceiver through a first set of antenna ports corresponding to a first antenna panel, one or more uplink (UL) reference signals (RSs);
measuring, by a processor via the transceiver using a second set of antenna ports corresponding to a second antenna panel, signal qualities of the one or more UL RSs for a time period; and
performing, by the processor, measurement reporting of the measured signal qualities, wherein the measurement reporting comprises:
a number (L) of smallest or largest reference signal received powers (RSRPs) of the one or more UL RSs, and
corresponding RS indices, where 1≤L<N, and N is a number of the one or more UL RSs transmitted, and
wherein transmitting the one or more UL RSs comprises transmitting the one or more RSs via the first set of antenna ports via a repetition mode and measuring comprises measuring the signal qualities via a beam-sweep mode at the second set of antenna ports, the repetition mode comprising repeatedly transmitting a same UL RS using same UL resources and the beam-sweep mode comprising using different beams.

### Claim 8 (depends on 7)

The method of claim 7, wherein:
the measurement reporting further comprises reference signal received quality/signal to interference and noise ratio (RSRQ/SINR) of RSs, and
the corresponding RS indices are one of synchronization signal block resource indicators (SSB-RIs), sounding resource indicators (SRIs) and channel state information reference signal resource indicators (CRIs).

### Claim 9 (depends on 7)

The method of claim 7, wherein measuring further comprises:
measuring block error rates (BLERs) or reference signal received powers (RSRPs) of the one or more UL RSs at the first set of antenna ports;
transmit the one or more UL RSs at the second set of antenna ports; and
measuring RSRPs of the one or more UL RS, transmitted from the second set of antenna ports, at the first set of antenna ports.

### Claim 10 (depends on 7)

The method of claim 7, wherein measuring further comprises:
measuring a self-interference leakage by transmitting UL RSs, at the first set of antenna ports, corresponding to candidate beam RSs and measuring the UL RSs at the second set of antenna ports;
measuring a signal to interference and noise ratio;
performing a beam failure detection; and
computing a block error rate (BLER) or bit error rate (BER) at the first set of antenna ports while transmitting the one or more UL RSs or UL data signals at the second set of antenna ports.

### Claim 11 (depends on 7)

The method of claim 7, wherein performing the measurement reporting comprises:
evaluating whether the computed BLER exceeds a threshold;
declaring a beam failure event based at least in part on the computed BLER;
identifying a new beam qnew as a function of SINR equals or exceeds a second threshold and/or SIleakage is less than or equal to a third threshold; and
transmitting beam failure recovery request (BFRQ) for the beam failure event at the first set of antenna ports through the second set of antenna ports, wherein the BFRQ comprises:
transmitting a scheduling request (SR) to BS through the second set of antenna ports to report the beam failure event happens, where SR is configured based on PUCCH format 0, PUCCH format 1, or other PUCCH formats; and
in response to an UL transmission being granted at the second set of antenna ports, reporting, through the second set of antenna ports, information on candidate beams in qnew can be reported.

### Claim 12 (depends on 7)

The method of claim 7, wherein measuring further comprises:
performing measurements of beamFailureResources q0 and candidateBeamRS q1 for the first set of antenna ports;
identifying candidate beam RS(s) x∈q1 such that SINRx≥SINRy and SIleakage,x≤SIleakage,y, where for any y∈q0, wherein q1 is a candidateBeamRS and q0 is failure DetectionResources; or
evaluating whether radio link quality of q1 becomes better than that of q0 or not for the first set of antenna ports; and
in response to identifying a radio link quality of the beam link corresponding to q1 being better than that of q0 for the first set of antenna ports, transmitting a reference signal received quality (RLRQ) for the first set of antenna ports through a current beam link at the second set of antenna ports.

### Claim 13

A non-transitory computer readable medium comprising a plurality of instructions that, when executed by a processor of a user equipment (UE), causes the UE to:
transmit, via a transceiver of the UE through a first set of antenna ports corresponding to a first antenna panel, one or more uplink (UL) reference signals (RSs);
measure, via the transceiver using a second set of antenna ports corresponding to a second antenna panel, signal qualities of the one or more UL RSs for a time period; and
perform measurement reporting of the measured signal qualities, wherein the measurement reporting comprises:
a number (L) of smallest or largest reference signal received powers (RSRPs) of the one or more UL RSs, and
corresponding RS indices, where 1≤L≤N, and N is a number of the one or more UL RSs transmitted; and
wherein the plurality of instructions is further configured to cause the UE to transmit the one or more UL RSs via a repetition mode at the first set of antenna ports and measure via a beam-sweep mode at the second set of antenna ports, the repetition mode comprising repeatedly transmitting a same UL RS using same UL resources and the beam-sweep mode comprising using different beams.

### Claim 14 (depends on 13)

The non-transitory computer readable medium of claim 13, wherein:
the measurement reporting further comprises reference signal received quality/signal to interference and noise ratio (RSRQ/SINR) of RSs, and
the corresponding RS indices are one of synchronization signal block resource indicators (SSB-RIs), sounding resource indicators (SRIs) and channel state information reference signal resource indicators (CRIs).

### Claim 15 (depends on 13)

The non-transitory computer readable medium of claim 13, wherein the plurality of instructions is further configured to cause the UE to:
measure block error rates (BLERs) or reference signal received powers (RSRPs) of the one or more UL RSs at the first set of antenna ports;
transmit the one or more UL RSs at the second set of antenna ports; and
measure RSRPs of the one or more UL RS, transmitted from the second set of antenna ports, at the first set of antenna ports.

### Claim 16 (depends on 13)

The non-transitory computer readable medium of claim 13, wherein the plurality of instructions is further configured to cause the UE to:
measure a self-interference leakage by transmitting UL RSs, at the first set of antenna ports, corresponding to candidate beam RSs and measuring the UL RSs at the second set of antenna ports;
measure a signal to interference and noise ratio;
perform a beam failure detection; and
compute a block error rate (BLER) or bit error rate (BER) at the first set of antenna ports while transmitting the one or more UL RSs or UL data signals at the second set of antenna ports, and
wherein the plurality of instructions is further configured to cause the UE to:
perform measurements of beamFailureResources q0 and candidateBeamRS q1 for the first set of antenna ports;
identify candidate beam RS(s) x∈q1 such that SINRx≥SINRy and SIleakage,x≤SIleakage,y, where for any y∈q0, wherein q1 is a candidateBeamRS and q0 is failureDetectionResources; or
evaluate whether radio link quality of q1 becomes better than that of q0 or not for the first set of antenna ports; and
in response to identifying a radio link quality of the beam link corresponding to q1 being better than that of q0 for the first set of antenna ports, transmit a reference signal received quality (RLRQ) for the first set of antenna ports through a current beam link at the second set of antenna ports.

### Claim 17 (depends on 16)

The non-transitory computer readable medium of claim 16, wherein the measurement reporting comprises:
evaluating whether the computed BLER exceeds a threshold;
declaring a beam failure event based at least in part on the computed BLER;
identifying a new beam qnew as a function of SINR equals or exceeds a second threshold and/or SIleakage is less than or equal to a third threshold; and
transmitting beam failure recovery request (BFRQ) for the beam failure event at the first set of antenna ports through the second set of antenna ports,
wherein the BFRQ comprises:
transmitting a scheduling request (SR) to BS through the second set of antenna ports to report the beam failure event happens, where SR is configured based on PUCCH format 0, PUCCH format 1, or other PUCCH formats; and
in response to an UL transmission being granted at the second set of antenna ports, reporting, through the second set of antenna ports, information on candidate beams in qnew can be reported.