Antenna ports determination of UL TX switching

US12294429B2 · kind B2 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Yiqing CAO · Beijing, CN
• Peter Gaal · San Diego, US
• Alberto Rico Alvarino · San Diego, US
• Enoch Shiao-Kuang Lu · San Diego, US
• Wanshi Chen · San Diego, US
• Kazuki Takeda · Tokyo, JP
• Yan Li · Beijing, CN
• Zhimin Du · Beijing, CN
• Bin Han · Lo Wu, CN

Key dates

• Filing date: Mar 3, 2021
• Grant date: May 6, 2025
• Expiry date: Apr 7, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/001
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A UE may determine a number of antenna ports associated with a frequency band that includes one or more CCs. The determined number of antenna ports may be based on a plurality of UL Tx chains for the one or more CCs/frequency band. The UE may switch from a first UL Tx chain to a second UL Tx chain, at least one of which may be associated with the one or more CCs/frequency band. The number of antenna ports may correspond to a maximum number of antenna ports of an individual CC of the one or more CCs, or to a sum of antenna ports of the one or more CCs. For the latter, the number of antenna ports may be limited to an available number of UE antenna ports when the sum of antenna ports is greater than the available number of UE antenna ports.