US 12,615,115 B2 · Multi-burst A-TRS for loop operation on SSB-less secondary cell in inter-band carrier aggregation

Abstract

Aspects of the present disclosure allow a UE to request, in an anchor carrier on one frequency band, a base station to configure and transmit A-TRS in an SSB-less secondary carrier on a different frequency band. The UE transmits, in a first cell served by the anchor carrier, a request for A-TRS. Based on the request, the UE receives, in a second cell lacking SSB transmissions served by the secondary carrier, the A-TRS based on the request. The base station may also control transmission of the A-TRS in the SSB-less secondary cell based on a timer derived from the request. Using the A-TRS, the UE may apply AGC and time/frequency tracking loop operations prior to receiving a PDSCH in the SSB-less secondary cell, thereby improving reception performance of downlink data transmissions in the secondary carrier. Thus, network energy savings provided by SSB-less secondary carriers may be obtained in inter-band CA.

Claims27

Dependent claims

An apparatus for wireless communication, comprising:

at least one processor;
at least one memory coupled with the at least one processor;
and
instructions stored in the at least one memory and operable, when executed by the at least one processor, to cause the apparatus to:
transmit, via user equipment (UE) assistance information in a first cell, a request for an aperiodic tracking reference signal (A-TRS);
and
receive, in a second cell lacking synchronization signal block (SSB) transmissions, the A-TRS based on the request, wherein the first cell is an anchor cell served by a first component carrier in a first frequency band, and the second cell is a secondary cell served by a second component carrier in a second frequency band, the second frequency band being different than the first frequency band.

4 more elements

Dependencies are inferred from the claim text.

Multi-burst A-TRS for loop operation on SSB-less secondary cell in inter-band carrier aggregation

Life of this patent

Multi-burst A-TRS for loop operation on SSB-less secondary cell in inter-band carrier aggregation

Life of this patent

Abstract

Claims27