US 2020/0288394 A1Published application

Selectively controlling transmit power from a radio access network (ran) cell to user equipment (ue) in closed-loop power control for uplink control channel based on variation in measured uplink signal quality

AssigneeCorning Research & Development Corporation

InventorsVandana Chhabra, Shirish Nagaraj, Farhan Aslam Qazi

Life of this patent

Estimating the term…

Loading patent…

Abstract

Selectively controlling transmit power from a radio access network (RAN) cell to user equipment (UE) in closed-loop power control for uplink control channel based on variation in measured uplink signal quality. To avoid the RAN cell continuously sending transmit power control messages that may not be effective in further adjusting transmit power of the UE, the RAN cell selectively controls transmit power of the UE based on effectiveness in such transmit power control changing uplink channel signal quality. The determined effectiveness of the transmit power control can be used by the RAN cell to determine when the next transmit power control message should be sent to the UE. The RAN cell can be configured to indirectly measure the uplink channel power by reviewing the received uplink channel quality in a report communicated from the UE to the RAN cell.

Claims25

Dependent claims

A radio access network (RAN) cell, comprising:

a transmitter circuit configured to transmit a communications signal on a downlink channel to a user equipment (UE);
a receiver circuit configured to receive communications signals on an uplink channel from the UE;
and
a controller circuit communicatively coupled to the transmitter circuit and the receiver circuit, the controller circuit configured to:
receive on the uplink channel, a downlink channel quality of the downlink channel measured by the UE;
measure an uplink channel quality of the uplink channel based on the received downlink channel quality;
in response to the measured uplink channel quality being less than a target uplink channel quality:
create a transmit power control message comprising a power adjustment indicator to be sent to the UE to adjust its transmit power based on the power adjustment indicator;
and
store the transmit power control message and the measured uplink channel quality corresponding to the sent transmit power control message;
determine if a number of stored sent transmit power control messages having a corresponding power adjustment factor greater than a defined power adjustment threshold exceeds a defined transmit power control message number threshold;
and
in response to the number of stored sent transmit power control messages having the corresponding power adjustment factor greater than the defined power adjustment threshold exceeding the defined transmit power control message number threshold:
determine a variance in the uplink channel quality of the uplink channel based on the measured uplink channel quality;
determine if the variance in the uplink channel quality of the uplink channel exceeds a defined uplink channel quality variance threshold;
and
in response to the variance in the uplink channel quality of the uplink channel not exceeding the defined uplink channel quality variance threshold, not send the transmit power control message to the UE.

14 more elements

A method of controlling transmit power of user equipment (UE) in communication with a radio access network (RAN) cell, comprising:

receiving on an uplink channel, a downlink channel quality of a downlink channel measured by a UE;
measuring an uplink channel quality of uplink channel based on the received downlink channel quality;
in response to the measured uplink channel quality being less than a target uplink channel quality:
creating a transmit power control message comprising a power adjustment indicator to be sent to the UE to adjust its transmit power based on the power adjustment indicator;
and
storing the transmit power control message and the measured uplink channel quality corresponding to the sent transmit power control message;
determining if a number of stored sent transmit power control messages having a corresponding power adjustment factor greater than a defined power adjustment threshold exceeds a defined transmit power control message number threshold;
and
in response to the number of stored sent transmit power control messages having the corresponding power adjustment factor greater than the defined power adjustment threshold exceeding the defined transmit power control message number threshold:
determining a variance in the uplink channel quality of the uplink channel based on the measured uplink channel quality;
determining if the variance in the uplink channel quality of the uplink channel exceeds a defined uplink channel quality variance threshold;
and
in response to the variance in the uplink channel quality of the uplink channel not exceeding the defined uplink channel quality variance threshold, not sending the transmit power control message to the UE.

10 more elements

A non-transitory computer-readable medium having stored thereon computer executable instructions which, when executed, cause a processor associated with a radio access network (RAN) cell to:

receive on an uplink channel, a downlink channel quality of a downlink channel measured by a user equipment (UE);
measure an uplink channel quality of the uplink channel based on the received downlink quality;
in response to the measured uplink channel quality being less than a target uplink channel quality:
create a transmit power control message comprising a power adjustment indicator to be sent to the UE to adjust its transmit power based on the power adjustment indicator;
and
store the transmit power control message and the measured uplink channel quality corresponding to the sent transmit power control message;
determine if a number of stored sent transmit power control messages having a corresponding power adjustment factor greater than a defined power adjustment threshold exceeds a defined transmit power control message number threshold;
and
in response to the number of stored sent transmit power control messages having the corresponding power adjustment factor greater than the defined power adjustment threshold exceeding the defined transmit power control message number threshold:
determine a variance in the uplink channel quality of the uplink channel based on the measured uplink channel quality;
determine if the variance in uplink channel quality of the uplink channel exceeds a defined uplink channel quality variance threshold;
and
in response to the variance in the uplink channel quality of the uplink channel not exceeding the defined uplink channel quality variance threshold, not send the transmit power control message to the UE.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/293,950Filed 6 Mar 2019
Published: 10 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04W 52/0216
Managed by the network, e.g. network or access point is leader and terminal is follower: using a pre-established activity schedule, e.g. traffic…
H04W 52/221
Taking into account previous information or commands: using past power control commands
H04W 52/146
Separate analysis of uplink or downlink: uplink power control
H04W 52/225
Taking into account previous information or commands: calculation of statistics, e.g. average or variance

Family

US 10,912,030 B2Related patent
US 2020/0288394 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key