Dima Technology College

Department of Computer Science

3rd year

Wireless Communication and

Mobile Computing
1 7/22/2022
 Chapter 2
Mobile Computing
 Mobile Computing is a technology that allows transmission of data,
voice and video via a computer or any other wireless-enabled
device.
 It can be defined as a computing environment of physical mobility.
 A mobile computing system allows a user to perform a task from
anywhere while on move.

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 Con’t…
 Mobile computing is also known by different names according to its
role:
 Nomadic – it moves with the roaming user (both for
local/remote services)
 Pervasive – it can be made available in any environment
 Ubiquitous – it is made to appear anytime, anywhere
 Mobile Computing involves the following –
 Mobile Communication
 It refers to the infrastructure that ensure seamless and reliable
communication among wireless devices.
 This include protocols, services, bandwidth and portals necessary
to facilitate and support the stated services
 Since the media is unguided, the infrastructure is basically radio
wave-oriented
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 Con’t…
 Mobile Hardware
 It includes mobile devices or device components that receive or
access the service of mobility.
 Devices include laptops, smartphones, tablets, PDA

 Mobile Software
 Programs that runs on the mobile hardware. Such as OS
 It deals with the characteristics and requirements of mobile
applications.
 For example IOS, Android etc.

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 Mobile devices and Mobile OS
 There are numerous mobile device operating systems available
today, and two of the most widely adopted are the iPhone's OS,
Apple iOS, and Google's open source OS, Google Android.
 These two mobile OSes take different approaches to the mobile
operating system.
 Mobile operating system (OS) is software that allows smartphones,
tablet PCs (personal computers) and other devices to run
applications and programs.
 Android OS:
 Bada (Samsung Electronics):
 BlackBerry OS:
 iPhone OS / iOS:
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 Con’t…
 Mobile device is a general term for any handheld computer or
smartphone.
 The term is interchangeable with 'handheld,' 'handheld device,' and
'handheld computer.
 ' Tablets, e-readers, smartphones, PDAs and portable music players
with smart capabilities are all mobile devices.
 Some of the most common mobile devices we use today include:
 Smartphones
 Tablets
 Laptop computers

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 Mobile Computing Issues and Challenges
 Mobile computing presents the following challenges.
 Power
 Mobile platforms spend much of their time attached to AC power.
 Multiple Network Connections
 A mobile platform, when docked, may have a wired LAN connection. It may
also have a wireless LAN connection.
 Security in a Wireless Environment
 Wireless traffic requires additional protection beyond that used on a
standard wired LAN.
 Mobility
 Wireless Medium
 Portability

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 Mobility:
 Auto configuration of the system, as the environment of the system
is developing continuously.
 Location management is also a big objection in mobility. To manage
the location, following tasks are to be performed regularly over a
fixed period of time.
 Track user’s call.
 Update user’s position and data.
 To maintain the heterogeneity is also a big task as the system is
keep moving in a large variation of situations
 Range of spectrum.
 Verification of security.

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 Wireless Medium:
 The transmission medium in mobile computing is wireless,
therefore the following points are considered:
 Various interferences occurs in the mobile computing by the
different elements in the environment.
 Accuracy and quantity of bandwidth should be sufficient.
 Network cost is feasible.

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 Portability:
 This means that the communication device moves, for eg.
mobile phones. The following mobile constraints are to be
considered as the devices are also mobile:
 Minimum number of resources are used.
 Security is very less, as security risks include the processing
of fake transactions, unauthorized access of data and program
files, and the physical theft or damage of the device.
 Restrictions of the battery.

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 Issues occurred in Mobile Computing
 here is a lot of advantage of using Mobile computing technology. But,
along with these advantages, you can face following is a list of issues.
 Costly due to Wireless Medium
 Issue due to Device Mobility
 Security Issues in Mobile Computing
 Physical Security or Data Security
 System Security or Network Security
 These issues can be resolved by using some common tactics. These
issues are:
 Using VPN technology
 Using Cryptography & Network Security in your project
 Use of Firewall technology in the project

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 Mobile Computing Technologies
 Computing Technologies are the technologies that are used
to manage, process, and communicate the data.
 Mobile is a computing device that not require any network
connection or any connection to transfer data or information
between devices.
 For example laptops, tablets, smartphones, etc.
 Mobile computing allows transferring of the data/information,
audio, video, or any other document without any connection to
the base or central network.
 These computing devices are the most widely used technologies
nowadays.
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 Con’t…
 There are some wireless/mobile computing technologies
given below:
 Global System for Mobile Communications (GSM)
 Code-Division Multiple Access (CDMA)
 Wireless in Local Loop (WLL)
 General Packet Radio Service (GPRS)
 Short Message Service (SMS)

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 Advantages and Disadvantages of
Mobile Computing
 Advantages of Mobile Computing Technology
 Enhanced Productivity
 Location Flexibility
 Saves Time
 Support Cloud Computing
 Disadvantages of Mobile Computing Technology
 Poor Quality of Connectivity
 Security Issues
 High on Power Consumption

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 Applications of Mobile Computing
 There are different types of real life applications which
are used in the Mobile computing, such as:
 Traffic
 Using the GPS
 Emergencies Situation
 Use in Business
 Credit Card Verification

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 Con’t…
 There are many limitations and challenges in Mobile
Computing. Explain below
 Battery consumption hindrance
 Interference is persisted in shielding.
 Inefficient bandwidth in transmission.
 Connection losses over entithe re network.
 Network stability.
 Interoperability problem.
 Protection constraints.

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