mobile computing sw(sadun)

Introduction to Mobile Computing


Sandun Wijayarathne

[email protected]

Sandun Wijayarathne


Overview

• Introduction

• Mobility?

• Features

• Devices

• Limitations

Sandun Wijayarathne 2


Introduction

• Mobile Computing =

–Mobile (moving) +

–Computing (using computer)

• Human-Computer interaction

• Expected to be transported during normal usage



Mobility?

• A device that moves between different, – geographical locations – networks – applications – Ex: palmtop, laptop, smart phones etc.

• A device due to which mobile communication is possible –Modems – Ex: Wi-Fi, 3G, 4G LTE, Bluetooth etc.



Features

• Mobile, –Hardware

–Software

–Communication

• Enable people to access network services anyplace, anytime, and anywhere (ubiquitous)



Devices

• Categories

–Portable computers

–Mobile phones

–Wearable computers



Portable Computers

• Compacted, lightweight units

• Mostly including a full character set keyboard

• Software that may be parameterized

• Ex: laptops, notebooks, notepads, etc.



Mobile Phones

• Restricted key set

• Primarily intended vocal communications

• But not restricted to it

• Ex: feature-phones, smart phones, phonepads, etc.



Wearable Computers

• Worn by the bearer under, with or on top of clothing

• Mostly limited to functional keys

• Primarily intended as incorporation of software agents

• Ex: watches, wristbands, keyless implants, etc.



Limitations

• Range & Bandwidth – Slower than direct cable

connections –GPRS and EDGE, and more

recently HSDPA and HSUPA 3G and 4G LTE

–Available within range of commercial cell phone towers

–Hi-speed LANs are inexpensive but have very limited range



Limitations

• Security standards –Dependent on public networks,

requiring careful use of VPN

– Security is a major concern while concerning the mobile computing standards on the fleet

– Can easily attack the VPN through a huge number of networks interconnected through the line



Limitations

• Application-Based Threats

– Ex: Malware, Spyware, Privacy, Malicious apps etc.

• Web-based Threats

– Ex: Phishing, Drive-by downloads, Browser exploits etc.

• Network Threats

– Ex: Network exploits, Wi-Fi sniffing etc.

• Physical Threats

– Ex: Lost or stolen devices etc.



Limitations

• Security and privacy solutions

–Enforced password protection

–Encryption

–Secure web browsing

–Secure internet transactions

–Firewalls, Virus guard software

–Etc.



Limitations

• Power consumption

–Rely entirely on battery power

–Compact size means unusually expensive batteries must be used to obtain the necessary battery life



Limitations

• Transmission interferences –Weather, terrain, and the

range from the nearest signal point can all interfere with signal reception

–Reception in tunnels, some buildings, and rural areas is often poor



Limitations

• Potential health hazards –Use mobile devices while

driving are often distracted from driving and more likely to be involved in traffic accidents

–May interfere with sensitive medical devices

–Mobile phone radiation and health?



Limitations

• Human interface with device

–Small screens and keyboards means hard to use

–Alternate input methods require training

• speech recognition

• handwriting recognition

• Gestures



Questions?



Thank You!


mobile computing sw(sadun)

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