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LDCE Wireless > 5G AND VoNR > Flashcards

5G AND VoNR Flashcards

1
Q

5G is IMT standard _________
1) IMT-2000
2) IMT-Advanced
3) IMT2020

A

IMT2020

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2
Q

spectrum efficiency unit
1) Mbits/s/m2
2) bits/s/m2
3) bits/s/Hz
4) Mbits/s/Hz

A

bits/s/Hz

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3
Q

Area Traffic Capacity unit
1) Mbits/s/m2
2) bits/s/m2
3) bits/s/Hz
4) Mbits/s/Hz

A

Mbits/s/m2

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4
Q

5G Phase-1
1) does not meet all the IMT2020
requirements
2) meets all the IMT2020
requirements

A

does not meet all the IMT2020
requirements

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5
Q

The 5G access network is broken down into a collection of ________ Areas
1) Location areas
2) Tracking areas

A

Tracking area
identified with a TAI (Tracking Area Identity)

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6
Q

TAI stands for
1) Traffic Area Identity
2) Tracking Area Identity

A

Tracking Area Identity

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7
Q

In Dual connectivity (DC), Master RAN Node
1) controls secondary RAN Node
2) maintains a control connection with the core network
3) share a data plane connection with secondary for media splitting
4) all the above

A

all the above

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8
Q

5G RAN nodes could be
1) A traditional 4G eNB which connects to EPC
2) 4G ng-eNB
3) A 5G gNB
4) all the above

A

all the above

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9
Q

_____ connects to the 5G core network
1) 4G eNB
2) 4G ng-eNB

A

4G ng-eNB

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10
Q

Bearer splitting can be done by
1) Master RAN node
2) Secondary RAN node
3) Both

A

Both

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11
Q

​​World radiocommunication conferences (WRC) are held
1) every year
2) every three to four years

A

every three to four years

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12
Q

it is the job of ___________ to review and revise the Radio Regulations, the international treaty governing the use of the radio-frequency spectrum and the geostationary-satellite and non-geostationary-satellite orbits

A

World Radiocommunication Conferences (WRC)

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13
Q

last WRC (ITU World Radiocommunication Conference) held is
1) WRC-20
2) WRC-23

A

WRC-23 at Dubai UAE

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14
Q

multiple access technique used in 5G
1) CP-OFDM
2) CQ-OFDM
3) C-OFDM

A

CP-OFDM (Cyclic Prefix – Orthogonal
Frequency Division Multiplexing)

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15
Q

CP-OFDM stands for

A

Cyclic Prefix – Orthogonal
Frequency Division Multiplexing

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16
Q

5G can use up to
1) 64 QAM
2) 128 QAM
3) 256 QAM
4) 512 QAM

A

256 QAM

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17
Q

C-RAN stands for

A

Cloud RAN

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18
Q

This will house much of the processing capability that would normally be found at the gNB
1) C-RAN centralized node
2) C-RAN distributed node

A

C-RAN centralized node

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19
Q

This would house the radio transmit/receive capability only
1) C-RAN centralized node
2) C-RAN distributed node

A

C-RAN distributed node

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20
Q

Cloud RAN adopts virtualization techniques (T/F)

A

T

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21
Q

choose correct item(s)
non-standalone implementation
1) gNodeB connects to the mobile via an eNodeB
2) eNodeB connects to the mobile via an gNodeB
3) gNodeB connects to the 5G core via an ng-eNodeB
4) ng-eNodeB connects to the 5G core via an gNodeB

A

1 and 3
gNodeB connects to the mobile via an eNodeB
gNodeB connects to the 5G core via an ng-eNodeB

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22
Q

non-standalone implementation
1) Uses EPC
2) does not use EPC

A

uses EPC (Evolved Packet Core)

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23
Q

Within the core, _______ is utilized to provide a highly scalable, adaptive network architecture.
1) SMF
2) UDM
3) NFV
4) gNodeB

A

NFV (Network Functions Virtualization)

24
Q

in 5G core, AMF stands for

A

Access and Mobility Management

25
Q

in 5G core, SMF stands for

A

Session Management Function

26
Q

in 5G core, UPF stands for

A

User plane function

27
Q

in 5G core, UDM stands for

A

Unified Data Management

28
Q

in 5G core, PCF stands for

A

Policy Control Function

29
Q

in 5G core, AUSF stands for

A

Authentication Server Function

30
Q

___ PDU Session(s) is/are established per Data Network for a given device.
Within a PDU Session, _____ QoS Flows
1) one, one
2) one, many
3) many, one
4) many, many

A

2) one PDU Session, many QoS flows

31
Q

Within a PDU Session, for voice services, separate QoS Flows may be established to handle the differing transport requirements of _________
1) signalling
2) voice
3) both
4) none

A

signalling and voice

32
Q

Within a PDU Session, for internet services, _____ QoS flow(s) may be required.
1) one
2) many

A

only one QoS Flow is required
which provides Best Effort service

33
Q

_______ play a key role in the device registration process (including security), as well as track the device’s mobility for reachability and paging purposes
1) UPF
2) AMF
3) SMF
4) UDM

A

AMF Access and Mobility Management

34
Q

_________ manages the PDU sessions associated with an individual subscriber
1) UPF
2) AMF
3) SMF
4) UDM

A

SMF Session Management Function

35
Q

_____ is responsible for allocating a suitable IP address to the device (IPv4 or IPv6), assuming an IP PDU Session is active
1) UPF
2) AMF
3) SMF
4) PCF

A

SMF Session Management Function

36
Q

________is the only network element within the core that is involved with user plane traffic
1) UPF
2) AMF
3) SMF
4) PCF

A

UPF User Plane Function

37
Q

_______ will routinely interact with the PCF to determine exactly which Data
Networks the device is allowed to connect to, as well as the QoS profile it can expect to be allocated
1) UPF
2) AMF
3) SMF
4) PCF

A

SMF Session Management Function

38
Q

_______ is responsible for ensuring data is placed on the correct downlink QoS flow, as well as ensuring that any dynamic policy rules are suitably enforced
1) UPF
2) AMF
3) SMF
4) PCF

A

UPF User Plane Function
(policy rules are provided by the PCF
via the SMF)
PCF: Policy Control Function
SMF: Session Management Function

39
Q

policy rules are provided by the PCF
via the _____
1) UPF
2) AMF
3) SMF
4) PCF

A

SMF Session Management Function

40
Q

The ___is essentially a central repository of subscriber information which can be used by several different network elements.
1) UPF
2) AMF
3) SMF
4) UDM

A

UDM Unified Data Management
includes access restrictions, mobility restrictions, Data Network QoS profiles and roaming permissions

41
Q

PCF dynamic policy decisions are based on
1) congestion
2) subscriber geolocation
3) billing
4) all

A

all

42
Q

PCF can
1) establish correct QoS
2) terminate a PDU session
3) both
4) none

A

both
Data Network can also potentially provide session level information, such as the subscriber wishing to make a call or view a video. In all of these scenarios, the PCF can dynamically change the way in which the subscriber receives their service, from establishing the correct QoS Flows in the network to completely terminating a PDU Session.

43
Q

A key element of the NFV concept is MANO which stands for ________

A

Management and Orchestration
NFV (Network Functions Virtualization)

44
Q

all network slice instances would use the ________ AMF that has been assigned to the subscriber
1) same
2) its own

A

same AMF

45
Q

devices on separate network slices will be considered to be on ______
1) completely separate networks
2) same network

A

completely separate networks

46
Q

_______ is the voice service enabler that uses the 5G core
1) IMS
2) AMF

A

IMS (IP Multimedia Subsystem)
Voice Over NR network Architecture consist of 5G RAN, 5G Core and IMS network

47
Q

IMS stands for

A

IP Multimedia Subsystem

48
Q

VoNR uses QoS Flow with ______ to transfer the speech packets after connection establishment
1) 5QI= 1
2) 5QI= 5

A

5QI= 1 is GBR
(GBR:Guaranteed Bit Rate)

49
Q

VoNR uses a QoS Flow with _____ for SIP signaling messages
1) 5QI= 1
2) 5QI= 5

A

5QI= 5 is non-GBR
(GBR:Guaranteed Bit Rate)

50
Q

3GPP has recommended _______ codecs for 5G
1) EVC
2) EPC
3) EVS
4) EVS

A

EVS (Enhanced Voice Services)

51
Q

5G EVS codec sampling frequency
1) Narrowband
2) Wideband
3) Super Wideband
4) Full band

A

All can be used

52
Q

The Voice Traffic flow with _____ protocol over dedicated PDU session
1) FTP
2) RTP
3) SFTP
4) HTTP

A

RTP protocol
Real Time Transport Protocol.
RTP must be used with UDP.
It is very sensitive to packet delays and less sensitive to packet loss.

53
Q

Voice Over NR network Architecture supports Service based interface using ____ protocol.

A

HTTP protocol

54
Q

5G Reference Point Archhitecture is
1) Standalone (SA)
2) Non Standalone (NSA)

A

Standalone (SA)
(NSA is Service Based Archhitecture)

55
Q

5G Service Based Archhitecture is
1) Standalone (SA)
2) Non Standalone (NSA)

A

Non Standalone (NSA)
(SA is Reference Point Archhitecture)

56
Q
A

LDCE Wireless (15 decks)

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