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4G/5G Cellular Networks Quiz

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Questions and Answers

What is the function of the Base station (eNode-B) in 4G LTE architecture?

Manages wireless radio resources and mobile devices in its coverage area (correct)

Acts as the PDN gateway to the Internet

Stores the International Mobile Subscriber Identity (IMSI) on SIM card

Coordinates with nearly base stations to optimize radio use

What is the role of the User Equipment (UE) in 4G LTE?

Coordinates with other base stations to optimize radio use

Acts as the PDN gateway to the Internet

Stores the International Mobile Subscriber Identity (IMSI) on SIM card

Manages wireless radio resources and mobile devices in its coverage area (correct)

What is the function of the Mobility Management Entity (MME) in 4G LTE?

Handles signaling between the mobile device (UE) and the evolved Node B (eNode-B) (correct)

Coordinates with nearly base stations to optimize radio use

Acts as the PDN gateway to the Internet

Manages wireless radio resources and mobile devices in its coverage area

What is the purpose of the Home Subscriber Service (HSS) in 4G LTE architecture?

<p>Serves as the home location register for subscriber-related data</p> Signup and view all the answers

What is the function of the Serving Gateway (S-GW) in 4G LTE?

<p>Routes data packets to and from the mobile device</p> Signup and view all the answers

Study Notes

Cellular Networks

4G/5G cellular networks enable widespread deployment and use of mobile Internet, with more mobile-broadband-connected devices than fixed-broadband-connected devices (5:1 in 2019).

4G Availability and Technical Standards

4G availability: 97% of the time in Korea and 90% in the US
Transmission rates up to 100's Mbps
Technical standards: 3rd Generation Partnership Project (3GPP) - www.3gpp.org
4G standard: Long-Term Evolution (LTE)

Similarities to Wired Internet

Edge/core distinction, but both belong to the same carrier
Global cellular network: a network of networks
Widespread use of protocols:
- HTTP
- DNS
- TCP
- UDP
- IP
- NAT
- Separation of data/control planes
- SDN
- Ethernet
- Tunneling

Differences from Wired Internet

Different wireless link layer
Mobility as a 1st class service
User "identity" (via SIM card)
Business model: users subscribe to a cellular provider
Strong notion of "home network" versus roaming on visited nets
Global access, with authentication infrastructure, and inter-carrier settlements

Elements of 4G LTE Architecture

Mobile device:
- Smartphone
- Tablet
- Laptop
- IoT

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Description

Test your knowledge about 4G and 5G cellular networks, including their technical standards, transmission rates, and availability in different regions. Explore the similarities to wired internet and the increasing trend of mobile-broadband-connected devices.