# US 10,375,595 B2 · Measurement and report of signal transmissions in LTE/LTE-A including contention-based shared spectrum

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- Number: US 10,375,595 B2
- Document ID: US10375595B2
- Status: Granted
- Kind: B2
- Application number: 15/210,379
- Filed: 2016-07-14
- Published: 2017-02-02
- Granted: 2019-08-06
- Earliest claimed: 2015-07-31
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Xiaoxia Zhang; Wei Zhang; Tao Luo
- Web page: https://patentgrep.com/patent/US10375595B2

## CPC

- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04B 17/309: Measuring or estimating channel quality parameters
- 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)}
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 24/02: Arrangements for optimising operational condition
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Reporting and measurements of measurement signals transmitted as a part of LTE/LTE-A networks that include contention-based spectrum is disclosed. In one aspect, a user equipment (UE) performs measurement signal thresholding by estimating the noise associated with the measurement signal. The UE would then use a measured parameter of that signal based on the measurement signal exceeding the threshold as a candidate for a valid measured parameter.

## Claims

### Claim 1

A method of wireless communication, comprising:
receiving by a processor, a signal over a contention-based frequency spectrum;
measuring, by the processor, a signal parameter based on the received signal;
estimating, by the processor, a quality of the received signal, wherein the estimating the quality includes measuring an interference level on the received signal;
determining, by the processor, whether the quality of the received signal exceeds a predetermined quality threshold;
in response to determining that the quality of the received signal exceeds the predetermined quality threshold, processing, by the processor, the signal parameter for reporting to a base station, wherein the determining that the quality of the received signal exceeds the predetermined quality threshold indicates that:
the received signal was not subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal includes a reference signal; and
in response to determining that the quality of the received signal does not meet the predetermined quality threshold, excluding, by the processor, the processing of the signal parameter for reporting to the base station, wherein the determining that the quality of the received signal does not meet the predetermined quality threshold indicates that at least one of:
the received signal was subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal does not include the reference signal.

### Claim 2 (depends on 1)

The method of claim 1, wherein the processing includes:
determining, by the processor, a period of time since a last valid signal parameter; and
identifying, by the processor, the signal parameter as a valid signal parameter in response to the period of time exceeding a minimum threshold.

### Claim 3 (depends on 2)

The method of claim 2, further including:
determining, by the processor, a number of signal parameter measurements during a current measurement period; and
transmitting, by the processor, the valid signal parameter to the base station in response to the number of signal parameter measurements exceeding a minimum measurement threshold.

### Claim 4 (depends on 3)

The method of claim 3, further including:
determining, by the processor, the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
transmitting, by the processor, the last valid signal parameter in response to the number of signal parameter measurements failing to exceed the minimum measurement threshold.

### Claim 5 (depends on 3)

The method of claim 3, further including:
determining, by the processor, the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
transmitting, by the processor, an indication to the base station, wherein the indication notifies the base station that the number of signal parameters measurements has failed to exceed the minimum measurement threshold.

### Claim 6 (depends on 5)

The method of claim 5, wherein the indication includes one of:
an explicit hit indicator;
an implicit indictor; or
a predetermined signal parameter value.

### Claim 7

An apparatus configured for wireless communication, comprising:
means for receiving a signal over a contention-based frequency spectrum;
means for measuring a signal parameter based on the received signal;
means for estimating a quality of the received signal, wherein the estimating the quality includes measuring an interference level on the received signal;
means for determining whether the quality of the received signal exceeds a predetermined quality threshold;
means, executable in response to a determination that the quality of the received signal exceeds the predetermined quality threshold, for processing the signal parameter for reporting to a base station, wherein the determination that the quality of the received signal exceeds the predetermined quality threshold indicates that:
the received signal was not subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal includes a reference signal; and
means, executable in response to a determination that the quality of the received signal does not meet the predetermined quality threshold, for excluding the processing of the signal parameter for reporting to the base station, wherein the determination that the quality of the received signal does not meet the predetermined quality threshold indicates that at least one of:
the received signal was subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal does not include the reference signal.

### Claim 8 (depends on 7)

The apparatus of claim 7, wherein the means for processing includes:
means for determining a period of time since a last valid signal parameter; and
means for identifying the signal parameter as a valid signal parameter in response to the period of time exceeding a minimum threshold.

### Claim 9 (depends on 8)

The apparatus of claim 8, further including:
means for determining a number of signal parameter measurements during a current measurement period; and
means for transmitting the valid signal parameter to the base station in response to the number of signal parameter measurements exceeding a minimum measurement threshold.

### Claim 10 (depends on 9)

The apparatus of claim 9, further including:
means for determining the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
means for transmitting the last valid signal parameter in response to the number of signal parameter measurements failing to exceed the minimum measurement threshold.

### Claim 11 (depends on 9)

The apparatus of claim 9, further including
means for determining the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
means for transmitting an indication to the base station, wherein the indication notifies the base station that the number of signal parameters measurements has failed to exceed the minimum measurement threshold.

### Claim 12 (depends on 11)

The apparatus of claim 11, wherein the indication includes one of:
an explicit bit indicator;
an implicit indictor; or
a predetermined signal parameter value.

### Claim 13

A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:
program code for causing a computer to receive a signal over a contention-based frequency spectrum;
program code for causing the computer to measure a signal parameter based on the received signal;
program code for causing the computer to estimate a quality of the received signal, wherein the estimating the quality includes measuring an interference level on the received signal;
program code for causing the computer to determine whether the quality of the received signal exceeds a predetermined quality threshold;
program code, executable in response to execution of the program code for causing the computer to determine that the quality of the received signal exceeds the predetermined quality threshold, for causing the computer to process the signal parameter for reporting to a base station, wherein a determination that the quality of the received signal exceeds the predetermined quality threshold indicates that:
the received signal was not subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal includes a reference signal; and
program code, executable in response to execution of the program code for causing the computer to determine that the quality of the received signal does not meet the predetermined quality threshold, for causing the computer to exclude the processing of the signal parameter for reporting to the base station, wherein a determination that the quality of the received signal does not meet the predetermined quality threshold indicates that at least one of:
the received signal was subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal does not include the reference signal.

### Claim 14 (depends on 13)

The non-transitory computer-readable medium of claim 13, wherein the program code for causing the computer to process includes:
program code for causing the computer to determine a period of time since a last valid signal parameter; and
program code for causing the computer to identify the signal parameter as a valid signal parameter in response to the period of time exceeding a minimum threshold.

### Claim 15 (depends on 14)

The non-transitory computer-readable medium of claim 14, further including:
program code for causing the computer to determine a number of signal parameter measurements during a current measurement period; and
program code for causing the computer to transmit the valid signal parameter to the base station in response to the number of signal parameter measurements exceeding a minimum measurement threshold.

### Claim 16 (depends on 15)

The non-transitory computer-readable medium of claim 15, further including:
program code for causing the computer to determine the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
program code for causing the computer to transmit the last valid signal parameter in response to the number of signal parameter measurements failing to exceed the minimum measurement threshold.

### Claim 17 (depends on 15)

The non-transitory computer-readable medium of claim 15, further including:
program code for causing the computer to determine the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
program code for causing the computer to transmit an indication to the base station, wherein the indication notifies the base station that the number of signal parameters measurements has failed to exceed the minimum measurement threshold.

### Claim 18 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the indication includes one of:
an explicit bit indicator;
an implicit indictor; or
a predetermined signal parameter value.

### Claim 19

An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured:
to receive a signal over a contention-based frequency spectrum;
to measure a signal parameter based on the received signal;
to determine whether the quality of the received signal exceeds a predetermined quality threshold;
to estimate a quality of the received signal, wherein the estimating the quality includes measuring an interference level on the received signal; and
to process the signal parameter for reporting to a base station in response to a determination that the quality of the received signal exceeds the predetermined quality threshold, wherein the determination that the quality of the received signal exceeds the predetermined quality threshold indicates that:
the received signal was not subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal includes a reference signal; and
to exclude processing of the signal parameter for reporting to a base station in response to a determination that the quality of the received signal does not meet the predetermined quality threshold, wherein a determination that the quality of the received signal does not meet the predetermined quality threshold indicates that at least one of:
the received signal was subject to an interference level sufficient to render the measured signal parameter invalid; and
the received signal does not include the reference signal.

### Claim 20 (depends on 19)

The apparatus of claim 19, wherein the configuration of the at least one processor to process includes configuration of the at least one processor:
to determine a period of time since a last valid signal parameter; and
to identify the signal parameter as a valid signal parameter in response to the period of time exceeding a minimum threshold.

### Claim 21 (depends on 20)

The apparatus of claim 20, further including configuration of the at least one processor:
to determine a number of signal parameter measurements during a current measurement period; and
to transmit the valid signal parameter to the base station in response to the number of signal parameter measurements exceeding a minimum measurement threshold.

### Claim 22 (depends on 21)

The apparatus of claim 21, further including configuration of the at least one processor:
to determine the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
to transmit the last valid signal parameter in response to the number of signal parameter measurements failing to exceed the minimum measurement threshold.

### Claim 23 (depends on 21)

The apparatus of claim 21, further including configuration of the at least one processor:
to determine the number of signal parameter measurements fails to exceed the minimum measurement threshold; and
to transmit an indication to the base station, wherein the indication notifies the base station that the number of signal parameters measurements has failed to exceed the minimum measurement threshold.

### Claim 24 (depends on 23)

The apparatus of claim 23, wherein the indication includes one of:
an explicit bit indicator;
an implicit indictor; or
a predetermined signal parameter value.