2/4 B.tech in Information Technology,
Velagapudi Ramakrishna Siddhartha
Mobile computing has been undergoing a bit of a renaissance lately. A few years ago it was a simple matter of finding a data-compatible mobile phone, a PC card modem, and a matching cable and installing it as a modem. Then people started to use PDA’s as well. Cell phones started to come with infrared ports to allow communication with laptops. Then cell phones started to come with modems built in. The connecting methods of mobile computing, its introduction, connection types, factors affecting connections, mobile applications and its limitations are explained.
What is mobile computing?
A view on portable devices.
▪ Distinction between "wireless" and "mobile."
▪ Mobile Devices
▪ Challenges in mobile computing
▪ Merits and Demerits
Wireless networking technology has engendered a new era of computing, called mobile computing. Mobile Computing is an umbrella term used to describe technologies that enable people to access network services any place, anytime, and anywhere. Ubiquitous computing and nomadic computing are synonymous with mobile computing. Mobile computing helps users to be productive immediately by reducing the training requirements associated with traditional automated data collection methods and provides a higher level of portability than keyboard-based systems. Field-based users can access any information available from the system at any time to make critical business decisions. This information is available at the point of use, wherever and whenever they need it. Portable devices like laptop and palm top computers give mobile users access to diverse sources of global information anywhere and at any time.
One of the most important and highly publicized recent developments in the PC world has been the introduction of the pen interface. By using a stylus to replace the keyboard, mobile computers are turning thousands of computer illiterate people especially those involved with field-based data collection into computer users. The market potential and breadth of application requirements for mobile computing has prompted numerous hardware and software companies to focus their efforts in providing solutions to the vertical, form-oriented marketplace.
Distinction between "wireless" and "mobile."
Wireless refers to the method of transferring information between computing devices, such as a personal data assistant (PDA), and
a data source, such as an agency database server, without a physical connection. Not all wireless communications technologies are mobile. For example, lasers are used in wireless data transfer between buildings, but cannot be used in mobile communications at this time. Mobile simply describes a computing device that is not restricted to a desktop. A mobile device may be a PDA, a "smart" cell phone or Web phone, a laptop computer, or any one of numerous other devices that allow the user to complete computing tasks without being tethered, or connected, to a network. Mobile computing does not necessarily require wireless communication. In fact, it may not require communication between devices at all.
➢ Mobile devices
Here we have seven different types of mobile devices:
❖ Laptop computers
❖ PDA’s and handheld PCs
❖ Smart phones and cellular phones