User:Magick777/Opportunistic Power Saving

Revision as of 23:42, 19 July 2010

Opportunistic Power Saving

Maintain phone in GSM mode by default when on battery

Design goals

Switch to GSM mode opportunistically when all seems to be quiet
- trigger on phone locked
- then check for blockers, most common first
  - don't change anything if we're on charge and not saving battery
  - don't change anything if we're on a GSM call
  - don't change anything if we're in the desired radio mode
  - don't change anything if we have blocker applications or connections
    - blockers don't apply if we're on WiFi
    - if we're on 3G then the known blockers should be
      - location-daemon active (GPS in use)
      - SIP / Skype / GTalk calls (VoIP in use)
  - don't change anything if the user didn't want the phone to lock anyway
    - cooling off period during which device unlock cancels radio switch
- perform any final sanity checks
  - recheck that we're still not on a call after our cooling off period
- then make the switch to GSM mode

Switch automatically to 3G or dual mode when something requires it
- trigger on events that are likely to require a data connection
  - launch browser
  - open e-mail account
  - launch other application
- but test the following
  - don't change anything if we're on a voice call
  - don't change anything if we're already using WiFi
  - don't change anything if we're already in the target radio mode

Retrieved from "http://bugs.maemo.org/User:Magick777/Opportunistic_Power_Saving"