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WorksheetsB2BT10_14Aug2025
Total questions: 20
Worksheet time: 7mins
What is the primary difference between a centralized RAN (C-RAN) and a traditional distributed RAN?
C-RAN separates the baseband processing units from the radio units, centralizing them in a data center.
D-RAN uses a virtualized network function, while C-RAN uses dedicated hardware.
C-RAN is a 2G technology, while D-RAN is for 5G.
C-RAN uses licensed spectrum, while D-RAN uses unlicensed spectrum.
What is the main purpose of beamforming in a RAN?
To reduce the overall power consumption of the base station.
To direct the radio signal to a specific user or direction, improving signal quality and efficiency.
To simplify the process of handovers between cells.
To broadcast the radio signal uniformly in all directions.
The split between the Radio Unit (RU), Distributed Unit (DU), and Centralized Unit (CU) is a characteristic of which RAN architecture?
2G GSM RAN
Traditional RAN (D-RAN)
Virtualized RAN (vRAN)
Satellite RAN
Which of the following RAN generations first introduced the concept of OFDMA (Orthogonal Frequency-Division Multiple Access)?
4G (LTE)
5G (NR)
3G (UMTS)
2G (GSM)
What is the main benefit of using a distributed RAN (D-RAN) architecture?
Greater flexibility in deploying base stations in isolated or remote areas.
Reduced latency due to centralized processing
Easier to manage and upgrade the network.
Lower capital expenditure due to shared resources.
Which of the following is a key characteristic of a 5G gNodeB as compared to a 4G eNodeB?
It can only operate on low-band frequencies.
It must be physically connected to the Core Network via a direct coaxial cable.
It supports a flexible and dynamic TDD/FDD frame structure.
It supports a single, fixed bandwidth channel.
What is the function of the Physical Layer (PHY) in the RAN protocol stack?
To manage user mobility and handovers.
To encrypt user data for secure transmission.
To route data packets to their final destination.
To handle the physical transmission and reception of radio signals.
What is the function of the User Plane in a 5G RAN?
To authenticate users and manage their security keys.
To manage the power supply of the base station.
To handle the actual user data traffic, such as web Browse or video streaming.
To manage the signaling and control messages for network connections.
What is the primary function of the MAC (Medium Access Control) layer in the RAN protocol stack?
To multiplex and schedule data from multiple users on the shared radio channel.
To provide a secure connection through encryption.
To route data packets across the internet.
To establish and release RRC connections.
What is the primary purpose of an 'inter-eNodeB' handover in a 4G LTE network?
To transfer a user's active connection from one eNodeB to another as they move.
To manage the power output of a single base station.
To change the frequency band a user is connected to within the same cell.
To move a user's session from one core network to another.
Which technology allows multiple users to share the same frequency and time slot in a 2G network?
TDMA (Time Division Multiple Access)
FDMA (Frequency Division Multiple Access)
OFDMA (Orthogonal Frequency-Division Multiple Access)
CDMA (Code Division Multiple Access)
What is the main role of the RLC (Radio Link Control) layer in the RAN protocol stack?
To handle the physical radio transmission.
To establish and release radio bearers for a connection.
To compress and decompress data to save bandwidth.
To manage the logical channels and provide flow control.
What is the purpose of the PDCCH (Physical Downlink Control Channel) in a 4G LTE RAN?
To transmit the reference signals for channel quality measurement.
To carry user data traffic for web Browse.
To carry control information for scheduling and resource allocation to user equipment.
To provide a secure, encrypted link between the base station and the user equipment.
What is the purpose of the `User Equipment` (UE) in a RAN?
To act as a central hub for all network connections.
To configure and maintain the base stations.
To manage network traffic and routing.
To receive and transmit radio signals to and from the network.
What is the function of the PDCP (Packet Data Convergence Protocol) layer in the RAN?
To establish and maintain the radio connection.
To perform header compression, ciphering (encryption), and integrity protection.
To manage resource allocation and scheduling.
To handle the physical transmission of radio signals.
What is the primary function of the Base Station Controller (BSC) in a 2G GSM network?
To provide a connection to the public internet.
To provide the air interface for user equipment.
To manage radio resources and handovers for a group of Base Transceiver Stations (BTSs).
To manage the call switching and routing in the core network.
In a 5G network, what is the purpose of the 'N2' interface?
To connect the gNodeB to the core network's User Plane Function (UPF).
To provide the radio link to user equipment.
To connect two different gNodeBs for handover purposes.
To connect the gNodeB to the core network's Access and Mobility Management Function (AMF).
Which of the following best describes the RAN architecture of a 2G GSM network?
A centralized RAN with remote radio units and a centralized baseband unit.
A UTRAN with NodeBs and a Radio Network Controller (RNC).
A Base Station Subsystem (BSS) consisting of a Base Transceiver Station (BTS) and a Base Station Controller (BSC).
A single eNodeB that connects to a virtualized core network.
Which of the following is a key difference between a Hard Handover and a Soft Handover?
A hard handover requires multiple base stations, while a soft handover only needs one.
A hard handover is managed by the core network, while a soft handover is managed by the RAN.
A hard handover involves a 'break-before-make' connection, while a soft handover is a 'make-before-break' connection.
A hard handover is used in 3G, and a soft handover is used in 4G.
Which RAN generation is often referred to as the 'NG-RAN' (Next Generation RAN)?
6G
3G
4G
5G
