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Introduction to Mobile Computing - Coggle Diagram
Introduction to Mobile Computing
Principles
Connectivity
Interactivity
Portability
Individuality
Functions of MC
User mobility
Network Mobility
Session mobility
Agent mobility
Host mobility
Components of MC
Mobile hardware
Mobile Software
Mobile Communication
Fixed and Wired
Mobile and Wireless
Mobile and Wired
Fixed and wireless
Simplified Reference Model of Communication
Network Layer
Data Link Layer
Transport Layer
Application Layer
Physical Layer
Issues in MC
Security issues
System security a network security
Data Security a physical security
Device mobility
Wireless Medium
Advantages
Portability
Better Productivity.
Simple Framework/Infrastructure
Device Mobility
Use of cloud technology
Disadvantages
High data losses
High on power consumption
Low data transmission rates
Frequent network issues
Less Secured
Cellular Systems
Cell
Base station
Base station controller(BSC)
mobile switching center (MSC)
Control number of cells
Arrange base station for channels
Handling all the connections
Home Location Register(HLR)
Visitor location register(VLR)
Cellular System Channels
Traffic channels
Control channels
Electromagnetic Spectrum
Radio wave
Microwave
Infrad
Visible light
Ultraviolet
X-ray and Gamma ray
Antennas
Isotropic radiation
Simple Dipole
Directed Antenna
Sectorized Antenna
Diversity Antenna
Signal Propagation
Detection range
Interference range
Transmission range
Multiplexing
Time Division Multiplexing (TDM)
Code Division Multiplexing (CDM)
Frequency Division Multiplexing(FDM)
Space Division Multiplexing (SDM)
Spread Spectrum
Direct sequence spread spectrum (DSSS)
Frequency Hopped Spread Spectrum
Slow FHSS
Fast FHSS