36 Questions
What is the maximum bit rate offered by 3G systems?
2Mbps
Which organization is responsible for managing the UMTS standard?
3GPP
What was the first country to deploy a commercial UMTS network?
Japan
What is the main advantage of WCDMA over 2G systems?
High data capability
Which duplexing modes are supported by 3G systems for communication?
FDD and TDD
What is the main benefit of Time Division Duplexing (TDD) over Frequency Division Duplexing (FDD)?
More efficient spectrum utilization
Which technology was the first to introduce digital voice and SMS capabilities in mobile communication?
2G
What is the bandwidth for 2G technology as per the provided table?
14.4 kbps
In which year did the implementation of 2.5G technology take place according to the text?
1999
What is one of the key features of UMTS networks as mentioned in the text?
Efficient use of radio spectrum
What technique was used by the global system for mobile communication (GSM) standard in the 2nd generation (2G) to multiplex up to 8 calls per channel?
Time Division Multiple Access (TDMA)
What was one of the limitations of 2G systems mentioned in the text?
Limited data capabilities
What is the primary goal of the 3rd generation (3G) mobile telephony standards defined by the ITU?
Increased bandwidth and diverse applications support
Which mobile telephony standard used CDMA to multiplex up to 64 calls per channel in the 800MHz band during the 2nd generation (2G)?
IS-95
What was one of the main reasons for the development of 3G mobile telephony standards?
Enhanced facilities and improved data rates
What is the advantage of using a single radio frequency for both directions in UMTS?
No need for a duplexer
Which components are needed when using a single radio frequency in UMTS?
Fast switching synthesizer, RF filter path, and fast antenna switch
In UMTS systems, what is the purpose of a fast antenna switch?
To switch between transmit and receive modes rapidly
Which technology uses Frequency Division Duplexing (FDD) in its standard GSM 900 Band?
GSM
What is the purpose of network domains in GSM systems?
To route incoming calls to the correct exchange
What allows a much higher subscriber density per MHz of spectrum in cellular systems?
Frequency reuse
What type of handsets can be used with a radio frequency lower than earlier systems in cellular networks?
Battery-powered handsets
What is required for continuous coverage in cellular systems as mobile units cross cell boundaries?
Frequency change
How are conversations maintained as mobile users travel from cell to cell in cellular networks?
Handover between base stations
What allows the same channels to be reused in different cells in cellular networks some distance apart?
"Frequency reuse"
What is the main purpose of HSDPA and wide band AMR services in UMTS?
To enhance the speed of the data rate
In UMTS, what speed can be achieved with the integration of voice data and downlink shared data on the same carrier?
Up to 14 Mbps
Which organization defines standards for different UMTS releases?
3GPP
What is the main difference between UMTS and CDMA 2000 in the context of IMT-2000 systems?
UMTS is based on WCDMA technology while CDMA 2000 is based on CDMA technology
What is the purpose of UMTS release architectures according to the text?
To provide a smooth transition from second-generation systems by gradually introducing new software and network elements
What is one of the key advantages that HSPA offers over the original UMTS system?
Higher data transfer rates
Which modulation technique is used in the downlink of HSPA to enable higher data transmission rates?
64-QAM
What is the downlink speed (in Mbps) offered by UMTS Release 7?
28
What upgrade is introduced in 3GPP Release 10 to enhance uplink performance?
MIMO in UL
Which technology increases both data and voice capacity in UMTS networks?
Multicarrier
In which domain was UMTS Release 5 primarily oriented according to the text?
Switched circuit operation
Test your knowledge on mobile communication systems where frequencies are reused to allow higher subscriber density per MHz of spectrum. Explore how small, battery-powered handsets contribute to improved efficiency and connectivity.
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