# US 9,439,206 B2 · Method for controlling measurements in a wireless telecommunications terminal

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- Number: US 9,439,206 B2
- Document ID: US9439206B2
- Status: Granted
- Kind: B2
- Application number: 13/158,770
- Filed: 2011-06-13
- Published: 2011-12-15
- Granted: 2016-09-06
- Earliest claimed: 2010-06-11
- Assignees: Intel Deutschland GmbH
- Applicants: Matthias Hofmann; Thomas Konrad
- Inventors: Matthias Hofmann; Thomas Konrad
- Web page: https://patentgrep.com/patent/US9439206B2

## CPC

- H04W 72/542: using measured or perceived quality
- H04W 52/0225: {using monitoring of external events, e.g. the presence of a signal}
- H04L 43/02: Capturing of monitoring data
- H04L 43/022: by sampling
- H04L 43/024: by adaptive sampling
- H04L 43/04: Processing captured monitoring data, e.g. for logfile generation
- H04L 43/06: Generation of reports
- H04L 43/067: using time frame reporting
- H04L 43/0811: by checking connectivity
- H04L 43/0817: by checking functioning
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 52/02: Power saving arrangements
- H04W 52/0209: {in terminal devices}
- H04W 52/0222: {in packet switched networks}
- H04W 52/0229: {where the received signal is a wanted signal}
- H04W 52/0232: {according to average transmission signal activity}
- H04W 52/0241: {where no transmission is received, e.g. out of range of the transmitter}
- H04W 52/0245: {according to signal strength}
- H04W 52/0261: {managing power supply demand, e.g. depending on battery level}
- H04W 52/0264: {by selectively disabling software applications}
- H04W 52/0274: {by switching on or off the equipment or parts thereof}
- H04W 52/028: {switching on or off only a part of the equipment circuit blocks}
- H04W 72/20: Control channels or signalling for resource management
- Y02D 30/70: in wireless communication networks
- 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)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A method is provided for controlling measurements in a wireless telecommunications terminal. In a Long Term Evolution (LTE) wireless communication system, the network instructs a UE to measure the received power and quality of the reference signals of the serving cell as well as of neighbor cells. The object of improving the system power consumption of user equipment (UE) that has to perform such measurements is solved by distributing the measurement functionality between RRC and PHY layers such that the RRC layer is enabled to rest in a power save mode unless results of the measurements have to be reported to the network, and to be only active for a minimum to ensure that the UE still behaves standard compliant to the network.

## Claims

### Claim 1

A method for controlling measurement procedures in a telecommunications terminal affiliated to a wireless telecommunications network, the method comprising:
receiving measurement configuration data, including measurement reporting criteria, from the wireless telecommunications network at a Radio Resource Control (RRC) layer of said telecommunications terminal;
communicating the measurement configuration data and the measurement reporting criteria from said RRC layer to a physical layer of the telecommunications terminal;
performing a measurement given by the measurement configuration data at the physical layer of the terminal;
evaluating results of the measurement with the measurement reporting criteria at the physical layer of the telecommunications terminal to provide evaluation results;
controlling said RRC layer from the physical layer to go into or remain in a power save mode if the evaluation results do not trigger a measurement result report to the wireless telecommunications network;
controlling said RRC layer from the physical layer to exit the power save mode to report the measurement if the evaluation results of the measurement trigger the measurement result report to the wireless telecommunications network; and
wherein the performing a measurement given by the measurement configuration data at the physical layer of the terminal includes performing layer 3 filtering at the physical layer.

### Claim 2 (depends on 1)

The method of claim 1, comprising: scheduling the measurement and filtering the measurement.

### Claim 3 (depends on 1)

The method of claim 1, further comprising deciding about downlink carrier frequencies and bands of other radio access technologies that are to be measured, by the RRC layer.

### Claim 4 (depends on 1)

The method of claim 1, wherein the communicating at least a part of said measurement configuration data from said RRC layer to said physical layer comprises communicating a first message that contains RRC information elements which are the same for all carrier frequencies, and communicating a second message that contains RRC information elements specific for each carrier frequency.

### Claim 5 (depends on 4)

The method of claim 4, wherein said RRC information elements included in the first message define at least a measurement gap configuration, a signal strength threshold for a serving cell, and a measurement quantity configuration for performing the layer 3 filtering.

### Claim 6 (depends on 4)

The method of claim 4, wherein said RRC information elements included in the second message define at least a carrier frequency, a measurement interval, and a configuration of a report to the wireless telecommunications network.

### Claim 7 (depends on 6)

The method of claim 6, wherein said wireless telecommunications network report configuration information element includes a scaling factor that depends on a mobility state of the telecommunications terminal.

### Claim 8 (depends on 4)

The method of claim 4, wherein the physical layer uses a third message to direct the RRC layer to go off the power save mode when a reporting criterion of the measurement reporting is fulfilled.

### Claim 9 (depends on 8)

The method of claim 8, wherein the physical layer informs the RRC layer when a Reference Signal Received Power (RSRP) of a serving cell gets worse than a signal strength threshold using said third message.

### Claim 10

A method for controlling measurement procedures in a telecommunications terminal affiliated to a wireless telecommunications network, the method comprising:
receiving measurement configuration data, including measurement reporting criteria, from the wireless telecommunications network at a Radio Resource Control (RRC) layer of said telecommunications terminal;
communicating the measurement configuration data and the measurement reporting criteria from said RRC layer to a physical layer of the telecommunications terminal;
performing a measurement given by the measurement configuration data at the physical layer of the terminal;
evaluating results of the measurement with the measurement reporting criteria at the physical layer of the telecommunications terminal to provide evaluation results;
controlling said RRC layer from the physical layer to go into or remain in a power save mode if the evaluation results do not trigger a measurement result report to the wireless telecommunications network;
controlling said RRC layer from the physical layer to exit the power save mode to report the measurement if the evaluation results of the measurement trigger the measurement result report to the wireless telecommunications network;
wherein the communicating at least a part of said measurement configuration data from said RRC layer to said physical layer comprises communicating a first message that contains RRC information elements which are the same for all carrier frequencies, and communicating a second message that contains RRC information elements specific for each carrier frequency; and
wherein said RRC information elements included in the first message define at least a measurement gap configuration, a signal strength threshold for a serving cell, and a measurement quantity configuration for performing layer 3 filtering.

### Claim 11

A method for controlling measurement procedures in a telecommunications terminal affiliated to a wireless telecommunications network, the method comprising:
receiving measurement configuration data, including measurement reporting criteria, from the wireless telecommunications network at a Radio Resource Control (RRC) layer of said telecommunications terminal;
communicating the measurement configuration data and the measurement reporting criteria from said RRC layer to a physical layer of the telecommunications terminal;
performing a measurement given by the measurement configuration data at the physical layer of the terminal;
evaluating results of the measurement with the measurement reporting criteria at the physical layer of the telecommunications terminal to provide evaluation results;
controlling said RRC layer from the physical layer to go into or remain in a power save mode if the evaluation results do not trigger a measurement result report to the wireless telecommunications network;
controlling said RRC layer from the physical layer to exit the power save mode to report the measurement if the evaluation results of the measurement trigger the measurement result report to the wireless telecommunications network;
wherein the communicating at least a part of said measurement configuration data from said RRC layer to said physical layer comprises communicating a first message that contains RRC information elements which are the same for all carrier frequencies, and communicating a second message that contains RRC information elements specific for each carrier frequency;
wherein the physical layer uses a third message to direct the RRC layer to go off the power save mode when a reporting criterion of the measurement reporting criteria is fulfilled; and
wherein the physical layer informs the RRC layer when a Reference Signal Received Power (RSRP) of a serving cell gets worse than a signal strength threshold using said third message.