Patent · US Active

Systems, methods, and devices for secondary cell activation with UE-specific reference signal

US12052187B2 · kind B2 · utility

0Cited by

2References

18Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Qiming Li · Beijing, CN
Dawei Zhang · Saratoga, US
Huaning Niu · San Jose, US
Jie Cui · San Jose, US
Manasa Raghavan · Sunnyvale, US
Xiang Chen · Campbell, US
Yang Tang · Pleasanton, US
Yushu Zhang · Beijing, CN

Key dates

Filing date	Jan 14, 2021
Grant date	Jul 30, 2024
Priority date	—
Expiry date	Jan 14, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04W76/15
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Techniques discussed herein may better ensure efficient fine time tracking during a second cell (SCell) activation procedure by using a tracking reference signal (TRS) that is User Equipment (UE) specific. A primary cell (PCell) may provide a UE with a TRS configuration that includes a UE-specific reference signal (RS) with periodicity or aperiodicity. In response to receiving a SCell activation command from the PCell, the UE may perform cell activation with fine time tracking in accordance with the UE-specific RS. As the delay time for the UE-specific RS may be less than the delay time for a system synchronization block (SSB) from the SCell, use of the UE-specific RS may expedite the cell activation procedure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.