User equipment having multiple subscriber identity modules with improved suspend / resume operation

US11197346B2 · kind B2 · utility

Assignee

• Apple Inc. · US

Inventors

• Srirang A. Lovlekar · Cupertino, US
• Sethuraman Gurumoorthy · San Jose, US
• Murtaza A. Shikari · Mountain View, US
• Srinivasan Nimmala · San Jose, US
• Sree Ram Kodali · Sunnyvale, US
• Fangli Xu · Beijing, CN
• Haijing Hu · Beijing, CN
• Yuqin Chen · Lo Wu, CN
• Dawei Zhang · Saratoga, US
• Longda Xing · San Jose, US
• Zhiwei Wang · Beijing, CN
• Yaoqi Yan · Beijing, CN
• Muthukumaran Dhanapal · Dublin, US
• Beibei Wang · Clarksville, US
• Lele Cui · Beijing, CN

Key dates

• Filing date: Jun 29, 2020
• Grant date: Dec 7, 2021
• Expiry date: Jun 29, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W88/06
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Devices and associated methods for operating a dual-subscriber identity module (SIM) dual-standby (DSDS) user equipment device (UE) configured with a first SIM and a second SIM. The UE performs communications with a first cellular network using the first SIM and a first radio resource control (RRC) connection, and receives a request to perform a higher priority communication using the second SIM. In response to the request to perform the higher priority communication, the UE transmits a request to the first network to suspend the first RRC connection. After transmission of the request to suspend the first RRC connection, the UE receives a message from the first network to place the first RRC connection in an inactive state, and initiates a timer, wherein the timer is used to determine whether the first RRC connection remains in the inactive state or transitions to an idle state.