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2.1 Basic of Mobile Computing - Coggle Diagram
2.1 Basic of Mobile Computing
Three-tier architecture describes the separation of functionality into layers, with each piece being a tier that can be housed on a physically different computer.
Three Tier Architecture
Application Tier
Presentation Tier
Data Tier
Wireless System Architecture
Logical Architecture of Wireless Network
Protocols that enable connections to be established between physical devices, or nodes
Control the routing and flow of data between nodes
Physical Architecture of a Wireless Network
easy to understand, usually visible, it consists of wireless hardware or device supported
Cellular Network Basic Concept
is an underlying technology for mobile phones, personal communication systems, wireless networking
Wireless Network System Components
Mobile Device
Base Station
Wireless Infrastructure
Types of Information Signal
Data
Type of information the network stores in computer or retrieves from it.
Example: email messages, files, web pages, video, music
Digital Signals
a non-continuous electrical signal, which is used to convey (send, receive, process) information between the sender & receiver
Data Rate
Correspond to the speed that digital signal transfers data across wireless network
Throughput
More accurate way of representing the true performance and efficiency of a network
Analog Signals
a continuous signal whose characteristics (amplitude, voltage, or frequency)changes continuously over
example: light and human voice, radio waves