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| title | tags | ||
|---|---|---|---|
| 06-challenges-for-ubicomp-and-intro-to-sensors |
|
Challenges
- What’s difficult about Ubiquitous Computing?
- Requires understanding of sensors and new sensing technologies
- Noisy inputs
- Sensor fusion
- Requires understanding of sensors and new sensing technologies
- Wireless communication channels
- Power consumption
- Context is only a proxy for human intent
- Unpredictable ussage context in particular for mobile devices
- Require novel user interfaces, limited/different I/O capabilities
- Lack of standardization in interface patterns
- Privacy & Security
Wireless Communication Channels
- Unpredictable availability and throughout
- Many physical issues:
- Refraction
- Absorption
- Antenna Geometry
- Power Limits
- Wireless spectrum is highly contested
- Many sources of interference
- Limited bandwith available
- Often complext SW/HW stacks
Power Consumption
- Biggest energy consumers
- Display (backlight)
- Wireless modules
- GPS receiver, cameras
- Sensors (touch, accelerometer, IMU)
- Limited power supply
- Tradeoff: capacity vs. size/weight/portability
- Energy consumption becomes important
- Two solutions:
- Increase energy in relation to size/weight
- Requires chemistry & physics knowledge
- Decrease energy consumption
- Requires CS/IS/EE knowledge
- Increase energy in relation to size/weight
Privacy and Security
- Context awareness requires huge amounts of private & personal data (see current generation mobile devices)
- Emails, contacts
- Sensor data, movement profiles
- PIN/TAN codes
- Photos
- Many people want to access data
- Google, Facebook, Microsoft (> ads)
- NSA, GCHQ, BND, Five Eyes (> crime prevention)
- Hackers (> extorsion, stealing your money)
- Problem 1: No pervasive encryption
- Problem 2: Voluntary use of cloud services, interconnected services