MOBILE
OPERATING
SYSTEMS
• TASHIL RYE MOORATEEAH
• LAVNISH MAUNTHROOA
• AVI GIRESHAN BHAGOWANTIN
• CHEVIND APPADOO
• POOSANDH BHAJAN
Introduction
• Mobile operating systems combine features of a personal
computer operating system with other features useful for
mobile or handheld use.
• Mobile devices with mobile communications abilities (e.g.,
smartphones) contain two mobile operating systems
Statistics on Mobile Operating System
By the end of 2016, over 430 million smartphones were
sold with:
• Android (87.1 %)
• IoS (17.9%)
• Windows Phone (0.3%)
Timeline/History
• 1973–1993
Mobile phone use embedded systems to control operation.
• 1993
1994 – The first smartphone, the IBM Simon, has a touchscreen,
email, and PDA features
• 2000
2000 – Symbian becomes the first modern mobile OS on a smartphone
with the launch of the Ericsson R380
Timeline/History
• 2002
Microsoft's first Windows CE (Pocket PC) smartphones are
introduced.
• 2007
Apple iPhone with iOS is introduced as an iPod, "mobile phone"
and "Internet communicator".
• 2008
2008 – OHA releases Android (based on Linux kernel) 1.0 with the HTC
Dream (T-Mobile G1) as the first Android phone.
Timeline/History
• 2010
Windows Phone OS phones are released but are not compatible
with the prior Windows Mobile OS.
• 2017
Apple introduces the iPhone 8, iPhone X, and iOS 11.
• 2018
Samsung release Samsung 9.0 based on Android "Oreo" 8.0
globally to Samsung Galaxy S8 and S8+
Android
Android Operating System
• It is a stack of s/w components :
– Application
– Application Framework
– Libraries
– Android Runtime
– Linux Kernel
• It is an open source and Linux based OS
MEMORY MANAGEMENT
• Android uses virtual memory and paging.
• It does support swapping.
• Process can share memory.
• Restricting application memory.
• Switching apps.
FILE SYSTEM
6 main partitions :
• /boot –android kernel/ram disk.
• /system-android OS,GUI, system
applications.
• /recovery- backup.
• /data- user data.
• /cache- frequently accessed data &
application components
• /misc-system settings.
ADVANTAGES
• Millions of application.
• Better performance, low cost.
• Android widget
• Android google developer.
DISADVANTAGES
• Android battery consumption.
• Android advertisement.
IOS
IOS Operating System
The system architecture consists of the following
components:
• Core OS
• Core Services
• Media
• Cocoa Touch
IOS Operating System
Some key features of the Apple iOS:
• Gesture recognition supports
• Siri personal assistant
• Secure Boot
• Secure Enclave
IOS File System
APFS - Apple File System (released for iOS devices on March 27,
2017, with the release of iOS 10.3)
Memory Management
• IOS include a fully-integrated virtual memory system that is
always on.
• IOS does not support swapping.
• IOS also uses the concept of paging.
• Besides, it divides the virtual address space of a process
into a no of regions.
• Each region contains a known no of pages.
• The kernel associates a virtual memory objects with
regions and manage the memory.
• IOS has the principles to free up memory.
Advantages
• Performance is awesome.
• Looks are ultra stylish.
• Generates less heat compared to Android.
• Excellent UI and fluid responsive.
• Excellent security.
Disadvantages
• Not open source.
• Not flexible(only supports IOS devices)
• Repair cost are very expensive.
• Application are very large compared to other OS.
• Apple restricted the connectivity with iTunes.
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