US 2022/0069959 A1 · UPLINK SOUNDING REFERENCE SIGNAL CARRIER AGGREGATION

Abstract

Methods and devices for sounding reference signal (SRS) carrier aggregation are provided. A target device is configured with N (N≥2) SRSs that include a reference SRS and N−1 target SRS. Lower layer signaling, such as a MAC-CE or a DCI message, is used to activate the N−1 target SRS, such that each of the N SRSs is transmitted on a respective carrier component from a common antenna port. The lower level signaling used to activate the target SRS may identify configuration parameters of the target SRS that are to be overridden by the corresponding configuration parameters of the reference SRS. Embodiments of the present disclosure increase the effective SRS bandwidth, which may improve positioning measurement accuracy, while also reducing the higher-layer configuration signaling by activating target SRS in lower layer signaling and overriding some configuration parameters of the target SRS by the corresponding configuration parameters of the reference SRS.

Claims24

Dependent claims

A method for sounding reference signal (SRS) carrier aggregation in a wireless communication network, the method comprising:

receiving, by a user equipment (UE), higher layer signaling that includes SRS configuration information for a plurality of SRSs;
receiving, by the UE, lower layer signaling that includes information associating N−1 target SRS from the plurality of SRSs with a reference SRS from the plurality of SRSs, wherein N is an integer and N≥2;
transmitting, by the UE, the reference SRS and the associated N−1 target SRS, the N SRSs, inclusive of the reference SRS and the associated N−1 target SRS, being transmitted on N different respective carrier components (CCs) on a same set of one or more antenna ports.

A method for sounding reference signal carrier aggregation in a wireless communication network, the method comprising:

transmitting, by a base station (BS) to a user equipment (UE), higher layer signaling that includes sounding reference signal (SRS) configuration information for a plurality of SRSs;
transmitting, by the BS to the UE, lower layer signaling that includes information associating N−1 target SRS from the plurality of SRSs with a reference SRS from the plurality of SRSs, wherein N is an integer and N≥2;
receiving, by the BS from the UE, the N SRSs, inclusive of the reference SRS and the associated N−1 target SRS, on N different respective carrier components (CCs), the N SRSs having been transmitted by the UE on a same set of one or more antenna ports.

An apparatus comprising:

at least one processor;
and
a computer readable storage medium operatively coupled to the at least one processor, the computer readable storage medium storing programming for execution by the at least one processor, the programming comprising instructions for:
receiving higher layer signaling that includes sounding reference signal (SRS) configuration information for a plurality of SRSs;
receiving lower layer signaling that includes information associating N−1 target SRS from the plurality of SRSs with a reference SRS from the plurality of SRSs, wherein N is an integer and N≥2;
transmitting the reference SRS and the associated N−1 target SRS, the N SRSs, inclusive of the reference SRS and the associated N−1 target SRS, being transmitted on N different respective carrier components (CCs) on a same set of one or more antenna ports.

3 more elements

An apparatus comprising:

at least one processor;
and
a computer readable storage medium operatively coupled to the at least one processor, the computer readable storage medium storing programming for execution by the at least one processor, the programming comprising instructions for:
transmitting, to a user equipment (UE), higher layer signaling that includes sounding reference signal (SRS) configuration information for a plurality of SRSs;
transmitting, to the UE, lower layer signaling that includes information associating N−1 target SRS from the plurality of SRSs with a reference SRS from the plurality of SRSs, wherein N is an integer and N≥2;
receiving, from the UE, the N SRSs, inclusive of the reference SRS and the associated N−1 target SRS, on N different respective carrier components (CCs), the N SRSs having been transmitted by the UE on a same set of one or more antenna ports.

3 more elements

Dependencies are inferred from the claim text.

Uplink sounding reference signal carrier aggregation

Life of this patent

Uplink sounding reference signal carrier aggregation

Life of this patent

Abstract

Claims24