Final Exam Study Guide: Wireless Technologies

Questions and Answers

What are the essential steps required to successfully set up a Bluetooth connection between two devices?

Ensure both devices have Bluetooth enabled, make one device discoverable, and pair them by confirming the passkey or code.

Describe the primary functions of nodes in a 3G network.

Nodes in a 3G network serve to route data, manage resource allocation, and maintain connections between mobile devices and the core network.

What key features distinguish 4G LTE networks from their predecessors?

4G LTE networks offer higher data rates, reduced latency, and improved capacity for simultaneous users.

Explain how RFID technology operates and the significance of frequency selection.

RFID technology uses radio waves to identify and track tags attached to objects, with frequency selection affecting read range and data transfer speed. Signup and view all the answers

Summarize the fundamental principles of WiMAX technology and its applications.

WiMAX provides wireless broadband access over long distances using fixed and mobile connectivity, often utilized in rural and underserved areas. Signup and view all the answers

How does the frequency range of RFID technology impact its operational range?

Higher frequencies generally allow for faster data rates but shorter ranges, while lower frequencies can extend the operational range but at slower data rates. Signup and view all the answers

What advantages does WiMAX offer over traditional broadband technologies?

WiMAX provides wider coverage areas, higher data rates, and the ability to support multiple users simultaneously compared to traditional broadband. Signup and view all the answers

In what ways do the functions of nodes in a 4G network differ from those in a 3G network?

4G nodes incorporate advanced features like MIMO (Multiple Input Multiple Output) for enhanced data speeds and can support all-IP infrastructures, unlike 3G nodes. Signup and view all the answers

What role does infrared technology play in wireless communications, especially in terms of security?

Infrared technology offers secure communications as it requires a line of sight, reducing the risk of interception compared to radio-based wireless systems. Signup and view all the answers

Describe the process used to set up a Bluetooth connection between devices, focusing on pairing and authentication.

Pairing involves discovering nearby Bluetooth devices, selecting a device to connect to, and completing authentication usually via passkeys or numeric codes. Signup and view all the answers

Study Notes

Bluetooth Functions and Setup

Bluetooth allows for wireless communication over short distances, typically up to 100 meters.
Key functions include data transfer, audio streaming, and device pairing.
Setup involves enabling Bluetooth on devices, searching for available devices, and initiating pairing through authentication codes.

3G Networks: Nodes Functions

3G networks utilize nodes such as User Equipment (UE), Node B, Radio Network Controller (RNC), and Core Network.
UE represents user devices accessing the network.
Node B is the base station responsible for radio communication with UEs.
RNC manages resources and handles communication within the radio access network.
Core Network connects mobile networks to the internet and manages data transmission.

4G Network: Nodes Functions and LTE Features

4G networks operate primarily on Long Term Evolution (LTE) architecture.
Key nodes include User Equipment, eNodeB (evolved Node B), and EPC (Evolved Packet Core).
eNodeB handles all radio-related functions and connects directly to the core network.
LTE features high data rates, low latency, and improved spectral efficiency through OFDMA (Orthogonal Frequency Division Multiple Access).

RFID Technology and Frequency Operations

RFID (Radio Frequency Identification) uses radio waves to automatically identify objects or people by attaching tags.
Operates on different frequency bands: low frequency (LF, 125-134 KHz), high frequency (HF, 13.56 MHz), and ultra-high frequency (UHF, 860-960 MHz).
Applications include inventory tracking, access control, and asset management.
Passive tags do not have a battery and are powered by the RFID reader's signal.

WiMAX Technology in Brief

WiMAX (Worldwide Interoperability for Microwave Access) provides wireless broadband access over long distances.
Operates over a range of frequencies from 2.3 GHz to 3.5 GHz and 5.8 GHz for fixed and mobile applications.
Supports both fixed and mobile devices, enhancing internet connectivity in urban and rural areas.
Employs OFDMA technology, ensuring high capacity and efficient bandwidth utilization.

Infrared Technology in Brief

Infrared technology uses infrared light to transmit data wirelessly, typically in short-range applications.
Operates primarily within the frequency of 300 GHz to 400 THz, which is invisible to the naked eye.
Commonly used in remote controls, short-range data transfer (such as IRDA), and some wireless communication systems.
Limited by line-of-sight requirements and can be affected by obstacles like walls or furniture.