Mobile and wireless computing
Introduction
The term mobile computing conveys different meaning to different person. The essential element of mobile computing environment is that the user need not maintain a fixed position in network, it allows himanshu143goel@gmail.com access to personal or business information for people who travel away form their primary workplace.
The term wireless and mobile are not synonymous. Wireless is a transmission or information transport method that enables mobile computing.
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Dimensions of mobile computing
1. wireless delivery technology and switching method
2. mobile information access devices
3. mobile data internetworking standards and equipment
4. mobile computing based business application
1. Wireless delivery technology and switching methods
The wireless communication service has become very complicated as it splits into a number of subsets. It includes various methods such as radio himanshu143goel@gmail.com base (land based wireless systems) and satellite-based wireless system.
(a) radio based system
(b) cellular communication
(a) Radio based system
Wireless communication services- radio, cellular, satellite and paging- involve radio signals that travel over frequencies from 100 KHz to 20 GHz . most wireless services are based in RF transmission in the 800- to- 900 MHz range. RF signals come in two forms
First one is local area RF
Wide area RF
RF communications are three types:
One way
Two way or
Local one way RF
Radio based services can be grouped into two main categories
1. land based, cellular communications, packet data networks, and specialize mobile radio (SMR).
2. satellite based paging systems and very small aperture satellites.
(b) Cellular based system
The cellular radio is grouped into three types:
1. Increasing capability and widespread coverage for cordless telephones.
Cellular technology is evolving toward taller base station antennas and larger cells to provide economical coverage of himanshu143goel@gmail.com sparsely populated areas. The extreme based of this large cell evolution is the development of satellite systems.
2. Decreasing cells size (micro cells) and power levels for hand-held
3. specialized wireless data systems
2. Mobile information access devices
The information can be accessed by various devices like
1. Portable computers
2. Personal digital assistants
3. Hybrid computers
Portable computers
The portable computers are divided into three types;
(a) Laptops are useful for applications that demand very powerful hardware such as video presentation, power point presentation, computer himanshu143goel@gmail.com aided design (CAD)
(b) Notebooks It is used by users who want to do large amount of word processing and manipulate sizable spreadsheet.
(c) The handheld system has less powerful versions of these capabilities with more initiative functions like phone lists and messaging.
Personal digital assistants
The PDA market is divided into three segments
(a) Personal communicators: - Personal computers are deices that couple a cellular telephone with a pen computers user interface.
(b) Digital assistants: - The digital assistants combine personal information management with wireless, voices, data and fax communications.
(c) Palmtops: - It attempts to provide higher functionality and comes with a wide variety of software both personal automation and communications.
Hybrid pen computers
A pen based interface is useful in many situations. Pen computers are often equipped with wireless communication. One of himanshu143goel@gmail.com the recent developments is pen-based computing systems is the addition of a keyboard, which seeks to harness the best of both worlds. It provide in two ways;
When open, it reveals a full size keyboard and the pen can be used as a mouse.
When the display is closed, the user is presented with a tablet-size writing pad.
All of these machines run standard operating systems and offer a broad range of options, including internal modems.
3. Mobile data internet working standards
The advanced mobile phone systems (AMPS) makes an attempt to overcome capacity and quality limitation of analog system. The reason is digital to analog transaction are;
Limited available bandwidth
Overcrowding
The current analog divide the available spectrum into 30 wide channels. This method of channelisation (division of the spectrum in multiple channels) is referred as frequency division multiple access (FDMA). The other means of channelisation are himanshu143goel@gmail.com being developed to allow more users the same region of the spectrum. Two channel methods are;
Code division multiple access (CDMA)
Time division multiple access (TDMA)
4. Mobile computing based business application
The present competitive business climate demands tools which users to work and communicate at their own convenience and discretion are two important applications of mobile computing and these are;
• Remote communication
• Remote data access
Remote communication
Real time communication has required people to structure their work and personal lines around pre-determined meeting place.
Remote data access
The mobile user have to access various applications and data files that are available at servers or in the enterprise network, such as accountancy or personal packages.
Presently, a growing list of himanshu143goel@gmail.com applications are being built on the mobile computing infrastructure. They include point of sale, inventory tracking, sales force automation, package tracking and delivery services, and police and taxi dispatching.
Introduction
The term mobile computing conveys different meaning to different person. The essential element of mobile computing environment is that the user need not maintain a fixed position in network, it allows himanshu143goel@gmail.com access to personal or business information for people who travel away form their primary workplace.
The term wireless and mobile are not synonymous. Wireless is a transmission or information transport method that enables mobile computing.
if you like my post then pls click on advertisment and add as you in my follower list.
Its beneficial for you and me both.
Dimensions of mobile computing
1. wireless delivery technology and switching method
2. mobile information access devices
3. mobile data internetworking standards and equipment
4. mobile computing based business application
1. Wireless delivery technology and switching methods
The wireless communication service has become very complicated as it splits into a number of subsets. It includes various methods such as radio himanshu143goel@gmail.com base (land based wireless systems) and satellite-based wireless system.
(a) radio based system
(b) cellular communication
(a) Radio based system
Wireless communication services- radio, cellular, satellite and paging- involve radio signals that travel over frequencies from 100 KHz to 20 GHz . most wireless services are based in RF transmission in the 800- to- 900 MHz range. RF signals come in two forms
First one is local area RF
Wide area RF
RF communications are three types:
One way
Two way or
Local one way RF
Radio based services can be grouped into two main categories
1. land based, cellular communications, packet data networks, and specialize mobile radio (SMR).
2. satellite based paging systems and very small aperture satellites.
(b) Cellular based system
The cellular radio is grouped into three types:
1. Increasing capability and widespread coverage for cordless telephones.
Cellular technology is evolving toward taller base station antennas and larger cells to provide economical coverage of himanshu143goel@gmail.com sparsely populated areas. The extreme based of this large cell evolution is the development of satellite systems.
2. Decreasing cells size (micro cells) and power levels for hand-held
3. specialized wireless data systems
2. Mobile information access devices
The information can be accessed by various devices like
1. Portable computers
2. Personal digital assistants
3. Hybrid computers
Portable computers
The portable computers are divided into three types;
(a) Laptops are useful for applications that demand very powerful hardware such as video presentation, power point presentation, computer himanshu143goel@gmail.com aided design (CAD)
(b) Notebooks It is used by users who want to do large amount of word processing and manipulate sizable spreadsheet.
(c) The handheld system has less powerful versions of these capabilities with more initiative functions like phone lists and messaging.
Personal digital assistants
The PDA market is divided into three segments
(a) Personal communicators: - Personal computers are deices that couple a cellular telephone with a pen computers user interface.
(b) Digital assistants: - The digital assistants combine personal information management with wireless, voices, data and fax communications.
(c) Palmtops: - It attempts to provide higher functionality and comes with a wide variety of software both personal automation and communications.
Hybrid pen computers
A pen based interface is useful in many situations. Pen computers are often equipped with wireless communication. One of himanshu143goel@gmail.com the recent developments is pen-based computing systems is the addition of a keyboard, which seeks to harness the best of both worlds. It provide in two ways;
When open, it reveals a full size keyboard and the pen can be used as a mouse.
When the display is closed, the user is presented with a tablet-size writing pad.
All of these machines run standard operating systems and offer a broad range of options, including internal modems.
3. Mobile data internet working standards
The advanced mobile phone systems (AMPS) makes an attempt to overcome capacity and quality limitation of analog system. The reason is digital to analog transaction are;
Limited available bandwidth
Overcrowding
The current analog divide the available spectrum into 30 wide channels. This method of channelisation (division of the spectrum in multiple channels) is referred as frequency division multiple access (FDMA). The other means of channelisation are himanshu143goel@gmail.com being developed to allow more users the same region of the spectrum. Two channel methods are;
Code division multiple access (CDMA)
Time division multiple access (TDMA)
4. Mobile computing based business application
The present competitive business climate demands tools which users to work and communicate at their own convenience and discretion are two important applications of mobile computing and these are;
• Remote communication
• Remote data access
Remote communication
Real time communication has required people to structure their work and personal lines around pre-determined meeting place.
Remote data access
The mobile user have to access various applications and data files that are available at servers or in the enterprise network, such as accountancy or personal packages.
Presently, a growing list of himanshu143goel@gmail.com applications are being built on the mobile computing infrastructure. They include point of sale, inventory tracking, sales force automation, package tracking and delivery services, and police and taxi dispatching.
Great info! I recently came across your blog and have been reading along. I thought I would leave my first comment. I don’t know what to say except that I have.
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