CTE CTE Emerging Technologies & Innovation 2 — Questions and Answers
Question 1: Which spectrum band is primarily used for 5G mmWave deployments in dense urban US markets due to its extremely high bandwidth but limited range?
- 600 MHz (Band 71)
- 2.5 GHz (Band 41)
- 24–100 GHz (mmWave) (Correct answer)
- 700 MHz (Band 12)
Correct answer: 24–100 GHz (mmWave)
Millimeter wave (mmWave) frequencies between 24 GHz and 100 GHz offer multi-gigabit speeds but have very short propagation distances and limited building penetration.
Question 2: In the US telecom industry, what does the term 'neutral host' refer to in the context of 5G small cell infrastructure?
- A carrier that does not offer voice services
- A shared infrastructure provider that hosts multiple operators on a single network build-out (Correct answer)
- A cloud provider that is not affiliated with any telecom company
- An unlicensed spectrum operator
Correct answer: A shared infrastructure provider that hosts multiple operators on a single network build-out
A neutral host is a third-party infrastructure provider that deploys and operates shared network infrastructure (such as small cells in stadiums or transit systems) that multiple carriers can utilize.
Question 3: What is the significance of 3GPP Release 17 for enterprise telecommunications use cases in the US?
- It introduced 2G GSM specifications
- It added enhancements for NR-Light (RedCap) devices, sidelink communications, and NTN satellite integration (Correct answer)
- It deprecated all legacy LTE standards
- It mandated IPv4-only networks
Correct answer: It added enhancements for NR-Light (RedCap) devices, sidelink communications, and NTN satellite integration
3GPP Release 17 introduced Reduced Capability (RedCap) devices for wearables and IoT, direct device-to-device sidelink communication, and non-terrestrial network (NTN) support for satellite connectivity.
Question 4: A telecom executive is assessing private 5G network deployment for a US manufacturing client. What is the most critical advantage of a standalone private 5G network over shared public 5G?
- Lower equipment costs
- Guaranteed data isolation, deterministic latency, and customized QoS for enterprise applications (Correct answer)
- Access to public internet without a firewall
- Mandatory roaming agreements with national carriers
Correct answer: Guaranteed data isolation, deterministic latency, and customized QoS for enterprise applications
Private 5G networks provide dedicated spectrum, guaranteed throughput and latency, and full data sovereignty, making them ideal for mission-critical industrial applications.
Question 5: Which technology enables telecom networks to dynamically allocate spectrum between uplink and downlink transmission in 5G TDD systems?
- OFDMA
- Dynamic Spectrum Sharing (DSS)
- Carrier Aggregation
- Flexible TDD slot configuration (Correct answer)
Correct answer: Flexible TDD slot configuration
5G NR's flexible TDD slot configuration allows operators to dynamically adjust the ratio of downlink to uplink slots based on real-time traffic demand, maximizing spectral efficiency.
Question 6: In a US carrier's roadmap, what is the primary function of a Service Based Architecture (SBA) introduced in 5G core (5GC)?
- To maintain backward compatibility with 3G circuit-switched voice
- To expose network functions as services consumable via APIs using HTTP/2 and JSON (Correct answer)
- To replace all optical transport with wireless backhaul
- To consolidate billing systems into a single database
Correct answer: To expose network functions as services consumable via APIs using HTTP/2 and JSON
The 5G Core Service Based Architecture exposes network functions (AMF, SMF, UPF, etc.) as microservices communicating via REST APIs over HTTP/2, enabling agile deployment and third-party integration.
CTE CTE Emerging Technologies & Innovation 2
Which spectrum band is primarily used for 5G mmWave deployments in dense urban US markets due to its extremely high bandwidth but limited range?