Fast acquisition in multi-subscriber identity module (SIM) devices

US9131475B2 · kind B2 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Venkata Siva Prasad Gude · Hyderabad, IN
• Debesh Kumar Sahu · Ghanpur, IN
• Venkata A Naidu BABBADI · Hyderabad, IN
• Venkata Girish Vadlamudi · Hyderabad, IN

Key dates

• Filing date: Jun 27, 2013
• Grant date: Sep 8, 2015
• Expiry date: Dec 14, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/70
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A method and apparatus configured to perform fast acquisition in multi-subscription multi-active devices are described. The apparatus may establish a first traffic call associated with a first subscription using a first radio frequency chain and a second traffic call associated with a second subscription using a second radio frequency chain. A subscription corresponding to a third subscription may enter an out-of-service mode when the first and second traffic calls are established. A first network may be acquired for the first subscription using the first RF chain after the first traffic call is terminated. The third subscription may be transitioned from out-of-service mode to idle mode using acquisition information inherited from the subscription corresponding to the first SIM after the first network is acquired. The third subscription and the first network may be associated with a same radio access technology and a same network operator.