Requirements

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Mesh / Connectivity Requirements

These requirements describe the connectivity of laptops to a school server mesh, to an infrastructure Access Point, and to each other through a local (not internet connected) mesh.

School Server

• M1 Laptops can connect to a school server mesh when booted up without any user intervention.
  • M1.1 Files, services, and internet connectivity on the school server are available to the laptop.
  • M1.2 Laptops on a mesh served by a school server can see each other in neighborhood mesh view.
  • M1.3 Laptops on a mesh served by a school server can share activities.

Infrastructure AP

• M2 Laptops can connect to infrastructure Access Points:
  • M2.1 Open, automatically if there is no school server mesh
  • M2.2 Open, by clicking on the Access Point in the neighborhood mesh view
  • M2.3 WEP enabled
    • M2.3.1 Sugar should ask for a key for the first connection attempt to each secured AP.
    • M2.3.2 Sugar should allow the following key formats to be entered:
      • 64-bit hex
      • 128-bit hex
      • 64-bit ASCII
      • 128-bit ASCII
    • M2.3.3 Once a successful connection has been established, Sugar should remember the key used.
  • M2.4 WPA enabled
    • M2.4.1 Sugar should ask for a key for the first connection attempt to each secured AP.
    • M2.4.2 Once a successful connection has been established, Sugar should remember the key used.

No Internet Access

• M3 Laptops can connect to each other when used in locations with no access to the internet (no infrastructure AP, school server, or other networks).
  • M3.1 Each laptop can see the other laptop(s) in the neighborhood mesh view and share activities.

Power Management Requirements

Most of the power management is behind the scene and should be invisible to the student.

The Power Management Table details what sections of the laptop are powered in different states. A more detailed description of the implementation is available at Hardware Power Domains.

Screen off

• PW1 After X minutes of inactivity through keyboard, mouse, directional, or gamepad keys, the screen will turn completely off (black), unless a running activity has asked to inhibit this timeout.
• PW2 In this mode, the mesh network is working properly and can forward packets.
• PW3 The screen will turn back on at the press of any key on the keyboard, mouse, directional or gamepad keys. The back light will come back on to the level it was before the screen was turned off. (Will the key press be acted on ?)

Suspend/Resume Button

The purpose of the 'suspend/resume' button on the laptop is to allow a child to leave the laptop open with the antenna up (and potentially having set up a good RF relay); and go into suspend with only the wireless on. The 'suspend' that happens is the same as that when the lid is closed, but that changes the RF characteristics quite a bit.

• PW4 Pushing the 'Suspend/Resume' button (previously the power button), will put the laptop into suspend mode, which includes Screen off.
  • PW4.1 In suspend mode, the laptop will continue to forward mesh networking packets if it is in the path between other mesh points (laptops, school servers).
  • PW4.2 Pushing the 'Suspend/Resume' button when the laptop is suspended will return it to powered on state with the same activities running as before it suspended.
  • PW4.3 Pressing any key on the keyboard, the mouse, directional keys or gamepad keys will also return the laptop to its full operational state.
• PW5 When the battery gets to its defined shut down level, whether in suspend mode or full operational mode, it will shut down gracefully, without data destruction.
• PW6 The student must be able to execute a full power down of the laptop from the Sugar home view.

Lid Closed

Whenever a student closes the lid, the laptop should go into suspend mode to save battery power. Wireless is still operational.

• PW7 When the lid is closed on the laptop, it will have the same affect as pushing the suspend/resume button (see Suspend/Resume Button).
• PW8 When the lid is opened, the laptop will resume (or, it may be necessary for the student to press a key or the suspend/resume button)

Ebook mode

Behind the scenes, reading should consume the least amount of power after 'suspend'. The student shouldn't notice anything when in ebook mode.

• PW9 A student can download a pdf file, and click on it. It will format and open for reading on the screen in low power mode. The screen brightness button can be used to reduce the power consumption even more.
• PW10 The student can convert the laptop to tablet mode and use the directional keys for scrolling through the text.
• PW11 If the student presses the rotate button, the screen will rotate 90 degrees. (This is in any mode, not just ebook mode !)
• PW12 In ebook mode, the screen may be turned off (see Screen Off) if there is no input activity for a fixed time period.

Laptop Activation

• ACT1 A Laptop that has not been activated will not complete the boot up process and will display an activation failure message for 5 minutes before terminating in a powered down state.
• ACT2 A Laptop that has been activated with the correct activation code, will boot completely into the start up screen, requesting the student to enter start-up data (name, XO color).
• ACT3 A Laptop that tries to activate against an incorrect activation code, will not boot completely and will display an activation error message for 5 minutes and terminate in the powered down state.

Laptop Upgrade via USB

• UP1 It is possible for a student to upgrade his XO image from a USB stick.
  • UP1.1 This software will first allow for backing up user data; do the upgrade; and allow for restore of user data.
  • UP1.2 Problems with the backup, upgrade, or restore should provide an appropriate error message with suggestion for how to recover.

Audio Requirements

• AU1 The student should be able to download standard MIDI files from the internet and play them on the laptop.
• AU2 Activities should be able to access a local, shared audio sample library.
• AU3 The laptop should provide ways to play audio files of all common audio formats at any sampling rate
• AU4 The laptop should provide a common format for sharing audio and music file between activities