Dual mode bluetooth/wireless device with power conservation features

• US 7,079,811 B2
• Filed: 03/30/2004
• Issued: 07/18/2006
• Est. Priority Date: 08/15/2001
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lee, Wayne A., Wendoll, Thomas E., Pattabiraman, Ganesh
• Primary Examiner(s): Corsaro, Nick
• Assistant Examiner(s): Pan, Yuwen
• Application Number:
  US10/813,869
• Publication Number:
  US 20040185857A1
• Time in Patent Office: 840 Days
• Field of Search: 455/41.2, 455/502, 455/574, 455/342.2, 455/552.1, 455/553.1, 455/426.1, 455/41.3, 370/350, 370/503, 370/504, 370/411, 370/500, 370/515
• US Class Current: 455/41.2
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 2201/70709 with discontinuous detection
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In a dual mode Bluetooth/wireless mobile unit, the next sleep mode Bluetooth wakeup time is rescheduled to synchronize with any upcoming idle mode wireless wakeup time that will otherwise precede the Bluetooth wakeup time. The Bluetooth clock is advanced, or other reconfiguration made to the Bluetooth module, as appropriate to prevent the scanning frequency from changing during a sleep mode Bluetooth wakeup/scanning interval commencing at the resynchronized Bluetooth wakeup time.

Claims

1. A signal-bearing medium tangibly embodying a program of machine-readable instructions executable by a digital data processing machine to perform operations to synchronize idle mode wakeup times for a Bluetooth module and a wireless module in a dual mode Bluetooth/wireless unit, the operations comprising:

determining whether a next planned wireless module wakeup time is earlier than a next planned Bluetooth module wakeup time;

if the next planned wireless module wakeup time is earlier than the next planned Bluetooth module wakeup time, performing operations comprising;

determining whether a next Bluetooth scanning frequency change is scheduled to occur after the next planned wireless module wakeup time, and only in such event, performing operations comprising rescheduling the next planned Bluetooth scanning frequency change to occur substantially at the next planned wireless module wakeup time.