US 2019/0199571 A1 · CONTROL MONITORING AND POWER CONTROL FOR MULTI-LINK DEPLOYMENTS

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be in communication with multiple base stations having a non-ideal backhaul link, where uplink and downlink transmission on a carrier may be sent on respective communication links. The transmissions may be synchronous or asynchronous, and the UE may identify a set of search candidates in overlapping TTIs associated with downlink transmissions from respective base stations. In some cases, a number or a timing of the set of search candidates may be based on the overlapping TTIs. The UE may also use different uplink transmit powers for transmissions on the different communication links. In some cases, a minimum reserved power may be used for each link where a remaining transmit power, for example, up to a maximum total transmit power, may be split between the links or applied to the uplink transmission that occurs temporally first.

Claims58

Dependent claims

A method for wireless communication at a user equipment (UE), comprising:

receiving a first downlink transmission from a first base station via a first communication link, the first downlink transmission received on a carrier during a first transmission time interval (TTI);
receiving a second downlink transmission from a second base station via a second communication link, the second downlink transmission received on the carrier during a second TTI, wherein the first TTI and the second TTI at least partially overlap;
identifying a set of search candidates within the first TTI and within the second TTI, wherein a number or timing of the set of search candidates is based at least in part on the first TTI and the second TTI partially overlapping;
and
monitoring the set of search candidates for respective control information from the first base station and the second base station.

2 more elements

A method for wireless communication at a user equipment (UE), comprising:

identifying a first uplink transmission using a first communication link with a first base station, the first uplink transmission to be sent on a carrier during a first transmission time interval (TTI);
identifying a second uplink transmission using a second communication link with a second base station, the second uplink transmission to be sent on the carrier during a second TTI, wherein the first TTI and the second TTI at least partially overlap;
identifying an uplink power control mode by which the UE is to operate when communicating with the first base station and the second base station on the carrier;
determining, based at least in part on the uplink power control mode, a first transmit power to be applied to the first uplink transmission during the first TTI and a second transmit power to be applied to the second uplink transmission during the second TTI;
and
transmitting the first uplink transmission using the first transmit power and transmitting the second uplink transmission using the second transmit power.

3 more elements

A method for wireless communication at a first base station, comprising:

identifying that a user equipment (UE) is in communication with the first base station and a second base station, wherein the first base station communicates with the UE on a first communication link on a carrier and the second base station communicates with the UE on a second communication link on the carrier;
identifying that a first uplink transmission from the UE to the first base station and a second uplink transmission from the UE to the second base station will each be transmitted during respective transmission time intervals (TTIs) that at least partially overlap;
determining an uplink power control mode by which the UE is to operate when transmitting on the first communication link and the second communication link on the carrier;
and
transmitting an indication of the uplink power control mode to the UE.

2 more elements

An apparatus for wireless communication, comprising:

a processor;
memory in electronic communication with the processor;
a receiver configured to receive a first downlink transmission from a first base station via a first communication link, the first downlink transmission received on a carrier during a first transmission time interval (TTI);
and
receive a second downlink transmission from a second base station via a second communication link, the second downlink transmission received on the carrier during a second TTI, wherein the first TTI and the second TTI at least partially overlap;
and
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify a set of search candidates within the first TTI and within the second TTI, wherein a number or timing of the set of search candidates is based at least in part on the first TTI and the second TTI partially overlapping;
and
monitor the set of search candidates for respective control information from the first base station and the second base station.

7 more elements

An apparatus for wireless communication, comprising:

a processor;
memory in electronic communication with the processor;
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify that a user equipment (UE) is in communication with a first base station and a second base station;
identify that a first downlink transmission from the first base station to the UE and a second downlink transmission from the second base station to the UE will each be transmitted during respective transmission time intervals (TTIs) that at least partially overlap;
determine a control monitoring configuration for a number or timing of a set of search candidates based at least in part on the respective TTIs that at least partially overlap;
and
a transmitter configured to transmit the first downlink transmission comprising the set of search candidates in accordance with the control monitoring configuration.

5 more elements

An apparatus for wireless communication, comprising:

a processor;
memory in electronic communication with the processor;
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify a first uplink transmission using a first communication link with a first base station, the first uplink transmission to be sent on a carrier during a first transmission time interval (TTI);
identify a second uplink transmission using a second communication link with a second base station, the second uplink transmission to be sent on the carrier during a second TTI, wherein the first TTI and the second TTI at least partially overlap;
identify an uplink power control mode by which a user equipment (UE) is to operate when communicating with the first base station and the second base station on the carrier;
determine, based at least in part on the uplink power control mode, a first transmit power to be applied to the first uplink transmission during the first TTI and a second transmit power to be applied to the second uplink transmission during the second TTI;
and
a transmitter configured to transmit the first uplink transmission using the first transmit power and transmitting the second uplink transmission using the second transmit power.

6 more elements

An apparatus for wireless communication, comprising:

a processor;
memory in electronic communication with the processor;
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify that a user equipment (UE) is in communication with a first base station and a second base station, wherein the first base station communicates with the UE on a first communication link on a carrier and the second base station communicates with the UE on a second communication link on the carrier;
identify that a first uplink transmission from the UE to the first base station and a second uplink transmission from the UE to the second base station will each be transmitted during respective transmission time intervals (TTIs) that at least partially overlap;
determine an uplink power control mode by which the UE is to operate when transmitting on the first communication link and the second communication link on the carrier;
and
a transmitter configured to transmit an indication of the uplink power control mode to the UE.

5 more elements

Dependencies are inferred from the claim text.

Control monitoring and power control for multi-link deployments

Life of this patent

Control monitoring and power control for multi-link deployments

Life of this patent

Abstract

Claims58