Mobile Computing

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Mobile Computing
By Keith O’Donohue

CONTENTS

* Introduction
* Devices
* Limitations
* IN VEHICLE COMPUTING AND FLEET COMPUTING
* SECURITY ISSUES AND MOBILE COMPUTING
* Portable computing devices
* Mobile data communication

INTRODUCTION

Mobile computing is human–computer interaction by which a computer is expected to be transported during normal usage. Mobile computing involves mobile communication, mobile hardware, and mobile software. Communication issues include ad-hoc and infrastructure networks as well as communication properties, protocols, data formats and concrete technologies. Hardware includes mobile devices or device components. Mobile software deals with the characteristics and requirements of mobile applications. It can be summed up as being able to use a computing device even when being mobile and therefore changing location. Portability is one of the main aspects of mobile computing.

DEVICES

Personal Digital Assistant
Personal Digital Assistant
Personal Digital Assistant (PDA): A PDA, also known as a palmtop computer, or personal data assistant, is a mobile device that functions as a personal information manager. PDAs are largely considered obsolete with the widespread adoption of smartphones. Nearly all current PDAs have the ability to connect to the Internet. A PDA has an electronic visual display, enabling it to include a web browser, all current models also have audio capabilities enabling use as a portable media player, and also enabling most of them to be used as mobile phones. Most PDAs can access the Internet, intranets or extranets via Wi-Fi or Wireless Wide Area Networks. Most PDAs employ touchscreen technology

Apple Smartphone
Apple Smartphone
Smartphone: A smartphone is a mobile phone built on a mobile operating system, with more advanced computing capability and connectivity than a feature phone. The first smartphones combined the functions of a personal digital assistant (PDA) with a mobile phone. Later models added the functionality of portable media players, digital cameras, pocket video cameras, and GPS navigation units to form one multi-use device. Modern smartphones also include high-resolution touchscreens and web browsers that display standard web pages as well as mobile-optimized sites. High-speed data access is provided by Wi-Fi and Mobile Broadband.The most common mobile operating systems (OS) used by modern smartphones include Google's Android and Apple iOS. Such operating systems can be installed on many different phone models, and typically each device can receive multiple OS software updates over its lifetime.

Tablet Computer
Tablet Computer
Tablet Computer: A tablet computer, or a tablet, is a mobile computer, larger than a mobile phone or personal digital assistant, integrated into a flat-touch screen and primarily operated by touching the screen rather than using a physical keyboard. It often uses an onscreen virtual keyboard, a passive stylus pen, or a digital pen.  The term may also apply to a variety of form factors that differ in position of the screen with respect to a keyboard. The standard form of tablet does not have an integrated keyboard but may be connected to one with a wireless link or a USB port. Typical functions of a tablet 2012 are: wireless mobile browser functions (using 2G,3G,4G or WiFi), E-mail and social media devices (typically with integrated apps), potential cell phone functions (Messaging, video calling, speakerphone or headset cellphone uses), GPS satellite navigation, integrated cameras, E-book reading, Downloadable apps.

LIMITATIONS

* Insufficient bandwidth: Mobile Internet access is generally slower than direct cable connections, using technologies such as GPRS and EDGE, and more recently HSDPA and HSUPA 3G networks. These networks are usually available within range of commercial cell phone towers. Higher speed wireless LANs are inexpensive but have very limited range.

*...
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