AlarmNet Code Review: Mote Configuration, Localization, and Power Management

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AlarmNetCode ReviewMote Configuration,Localiza
tion,and Power Management

• January 29, 2009

http//www.cs.virginia.edu/wsn/medical/
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AlarmNet Physical Architecture
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Mote Operations

• Main functions
• Configuration and Localization
• Sense and Query response
• Power Management

How to build and run? Only need to compile and
install SensorMote
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Localization

• Module and codes \tinyos\Localization
• Interfaces provided
• Mechanism Walk-in GPS
• receive locations from Anchors
• Location can be set by Config

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Configuration

• Module and codes \tinyos\config\
• A motes configuration profile
• Two IDs for each mote
• Hardware ID, silicon serial number, call
  hardwareID.read()
• networkl id, (TOS_LOCAL_ADDRESS), assigned by
  Stargate.

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Configuration

• Main Procedure -- Initialize
• Begin call InitialTimer.start in
  StdControl.start()
• Load the configuration from the flash
• If the configuration is invalid (a mote
  never been configured)
• request network id from Stargate (task
  requestID)
• get location (call Localization.getLocation)
• write the configuration into the flash
• register myself to the Stargate (task
  sendRegisterMsg)
• If the configuration is valid (a mote
  has been configured before)
• register myself to the Stargate (task
  sendRegisterMsg)

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Load the configuration
configuration is invalid
Request ID from SG
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Configuration

• Main Procedure respond Config command from SG
• CONFIG_IE_ASSIGN_ID Instruction to set my
  network ID. Hardware ID must match.
• CONFIG_IE_LOCATION_BIND Instruction to set my
  location x,y and code.
• CONFIG_IE_RESET soft-reset the mote, but keep
  the configuration
• CONFIG_IE_RESET_CONFIG soft-reset the mote and
  delete the configuration
• When the localization changes, save the change to
  the flash

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Power Management

• Manage four power modes of motes
• Sleep Mote turns off all sensors and the radio
  and CPU goes into deep sleep (0.30.8mA).
• Interrupt Mote turns off the radio, but turns on
  all sensors. If sensing events occur, the radio
  will be turned on to send Msgs. (24mA)
• Duty_cycle Mote turns on all sensors and but
  turns on and off the radio accroding to two
  parameters dutyInterval and Sleep Interval
• Working Mote turns on all sensors and the radio
  2540mA
• Main function Receive PM messages from SG and
  execute PM commands
• If multiple commands collide, follow the command
  with the highest priority.

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Power Management

• How the power management coordinated with other
  components?
• Use the PowerManage Interface
• Call request_send () to request send. Return
  Fail if mote is in Sleep or sleep cycle the in
  duty-cycle mode, Otherwise return SUCCESS, and
  turn on the radio if mote is in the Interrupt
  mode.
• Call send_done () to notify the send is down. If
  mote is in the interrupt mode

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Possible extension

• More localization implementation
• More adaptive power management schemes.