Tutorial Assessment Huawei HCNA and HCNP 2014_Answers

Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014

I. Propagation and Antenna Theory

1. [True/False] In the radio propagation, Fast Fading (Shadow Fading) is in normal distribution, while Slow Fading (Rayleigh Fading) is in Rayleigh distribution.

True False

2. [True/False] Doppler Effect has great impact on the narrow-band radio system but less on the broad-band radio system

True False

3. [True/False] In WCDMA mobile communication system, the diffraction capability is worse and the penetration capability is better at frequency 2 GHz than that at GSM 900 MHz

True False

4. [Multiple Choice] In the WCDMA system, methods against fading include:

Adopt Rake Receiver to concentrate delayed and disperse energy

Adopt powerful encoding, interleaving and retransmission protocol to increase redundancy and time diversity, thereby helping the receiver recover user bit from the fading

As a broadband system, WCDMA itself supports frequency diversity to withstand fading

Adopt fast power control and intrinsic diversity reception of Rake Receiver to reduce signal power fading

5. [True/False] Normally different antenna diversity modes will be adopted in urban and rural area, space diversity antenna will be used in urban area and polarization diversity will be used in rural area to overcome fast fading.

True False

6. [True/False] Walfish-Ikegami Propagation Model is defined to designed macro cell forecast with frequency range 800-2000 MHz and cell radius range 1-20 km True False

7. [True/False] The VSWR of antenna should not be less than 1.5

True False

8. [True/False] Antenna gain is related to radiation pattern, the more narrow the major lobe is, the higher antenna gain is

True False

9. [True/False] dBi is defined as the energy centralizing capability of the actual antenna in relation to isotropic antenna

True False

10. [True/False] To antenna gain: 10dBi = 12.5dBd

True False

11. [True/False] To have an antenna with better directivity and stronger anti-interference capability, one should choose antenna with wider half-power beam width

True False

12. [Multiple Choice] To tuning coverage area of a cell, one can adjusting antenna tilt, such as:

Mechanical Down tilt

Electrical Down tilt

Adjusting FE

Adjusting ME RE

13. [True/False] Front to Back Ratio should be greater than 25dB if to be applied in urban area.

True False

14. [True/False] To cover the tunnel, if the length of tunnel is longer than 2km, we suggest using leaky cable to cover it.

True False

15. [Single Choice] In radio propagation model tuning, the purpose of geography binning is:

Eliminate slow fading, remain the effect of the fast fading.

Eliminate slow fading and fast fading

Eliminate fast fading, remain the effect of slow fading

All above is wrong


II. Radio Network Dimensioning

16. [True/False] Engineer can use CAN tool to configure neighbor planning and SCP tool to configure scrambling code planning

True False

17. [True/False] In WCDMA link budget, Interference Margin will reflect the load of system.

True False

18. [True/False] In Radio Network Dimensioning, according to link budget, we can get cell capacity.

True False

19. [Single Choice ] In uplink budget calculation, the body loss for PS service is

2 dB

0 dB

3 dB

1 dB

20. [Single Choice] For having a load factor 75%, we should set uplink Interference Margin:

0 dB

3 dB

4 dB

6 dB

21. [Single Choice ] Which is correct to depict the receiver sensitivity

PN = K T / (BW NF)

PN = K T BW NF

PN = K T BW / NF

PN = K T NF / BW

22. [Single Choice] Eb/No required has no relation with:

Configuration of diversity

Bearer type

System Bandwidth

Multi-path channel condition

23. [Single Choice ] The noise of the receiver has no relation with:

Working temperature

System bandwidth

Noise Figure (NF)

Working humidity

24. [Single Choice ] For HSDPA radio network planning, the downlink cell target load is usually set as:

50%

75%

100%

90%

25. [Single Choice ] In downlink budget, the calculation of downlink cell load factor has no relation with:

Orthogonal Factor

The Noise Factor

Activity Factor

Adjacent-cell interference factor

26. [Single Choice ] For the CS 12.2K Service, the maximum power of UE usually set as:

21 dBm

27 dBm

24 dBm

33 dBm

27. [True/False] In high speed motion, Fast Power Control works better than Interleaving to prevent Fast Fading

True False


III. WCDMA Overview and Processing Procedure

28. [True/False] In WCDMA band, if we have frequency 2120 MHz as a DL central frequency, than UARFCN DL is 10550

True False

29. [True/False] In WCDMA network, the Interface between NodeB & RNC is called Iub, the interface between RNC & RNC is called Iur, the interface between RNC & CN is called Iu, interface between UE & NodeB is called Uu

True False

30. [True/False] Service Area Identification (SAI) is the only identifier of a service cell in form of MCC+MNC+LAC+SAC

True False

31. [Multiple Choice] Which are the following functions not physical level function:

Modulation

Coding

Spreading

Load Control

32. [Single Choice] In WCMA network, different services are assigned with different OVSF codes. Which of the following downlink OVSF code can be assigned to 384 kbps services?

CCH 8,1

CCH 4,0

CCH 4,1

CCH 8,0

33. [Single Choice] Which of the following modulation mode is used in R4

GMSK

16QAM

64QAM

QPSK

34. [Single Choice] Channelization code is used to distinguish (____) in uplink

Different cells

Different users

Different physical channel of one user

Different user in one cell

35. [Single Choice] In the following, which in not the channel coding on the downlink channel

Convolutional Coding

No Coding

AMR

TURBO Coding

36. [Single Choice] Which of the following entities does not process the voice traffic data in Uu-Interface

PDCP

Physical Layer

RLC

MAC

37. [Single Choice] Which of the following entities does not process the PS traffic data in Uu-Interface

PDCP

Physical Layer

RRC

MAC

38. [Single Choice] SCH can be classified as PSCH and SSCH. PSCH only carries one type of PSC, but SSC in SSCH can be classified as (__) types

1

15

16

256

39. [True/False] In CELL_PCH state, no data are transferred in both uplink and downlink, UTRAN doesnt know where UE is located, but in CELL_FACH state, UE is active, few data is transferred in both uplink and downlink, so UTRAN knows which cell UE is in.

True False


40. [Single Choice] The PRACH resources can be classified into several (_____), so as to provide RACH application with different priorities

ASC

Sub channel

AC

Signatures

41. [Multiple Choice] The UE shall read System Information Broadcast on a BCH transport channel when the UE in which work mode?

Idle Mode

CELL_PCH

CELL_FACH

URA_PCH

42. [Single Choice] In WCDMA system, the AC-ASC mapping information is optimal and used for only in system information block?

SIB 1

SIB 3

SIB 5

SIB 11

43. [Single Choice] In WCDMA system, DRX duration coefficient in idle state is delivered in:

MIB

SB

SIB 1

SIB 5

44. [Multiple Choice] In System Information Block, SIB 5 included:

CPICH Power

PI number in one PICH frame

Available sub-channel number

UL interference level

45. [Multiple Choice] In WCDMA system, Np is the PI number in one PICH frame, the values of Np can be:

18

36

72

144

46. [Single Choice] Which description of P-CPICH in the following is incorrect:

The transport rate is 15 Kbps fixed

Normally the power setting is 10% of the total power

On P-CPICH, the scrambling is after spreading

On P-CPICH, use the spread factor of SF=256

47. [Single Choice] When mapping QoS into physical level parameter, for below item which one is not the physical level configuration parameter?

Channel coding type

Power offset

Interleaving length

TFCI

48. [Multiple Choice] RAB Integrate Priority are set according to:

APR

Traffic Class

HSPA or DCH

THP (for interactive service only)

49. [Multiple Choice] Normally, the below condition will be defined as drop call:

Received any BCH information (system information)

Received RRC Release message and the release cause is Not Normal

Received any of the message of CC Disconnect, CC Release Complete, CC Release, and the release cause are Not Normal Clearing or Not Normal, Unspecified

Received the RB release message


50. [Multiple Choice] Which of the following reason can trigger cell update?

Paging response

Theres uplink data need to be transfer

UE location changed

Periodic update

51. [True/False] The more neighbor we configure, the better network performance will be.

True False

52. [Single Choice] Which one is wrong about neighbor cell optimization?

Neighbor cell missing may cause call drop

After drive test, comparing UE signal with Scanner will assist engineer to find missing neighbor more easily

Neighbor cell include intra-frequency, inter-frequency, and inter-system

The more neighbor cell we configure, the better network performance will be

IV. HSDPA and HSUPA overview

53. [Single Choice] HSDPA is introduced in:

R4

R5

R6

R7

54. [Multiple Choice] The key technologies of HSUPA include:

HARQ

16QAM

AMC

Fast Scheduling

55. [Single Choice] Which of the following parameter is used for uplink DPCCH initial synchronization

Trifailure

T312

N315

NInsyncInd

56. [Single Choice] in MIMO, which PCI should be confirm according to UEs channel status evaluation?

W1

W2

W3

W4

57. [Single Choice] For HSUPA, which channel is used to transfer ACK/NACK information?

HICH

AGCH

E-DPCCH

HS-DPCCH

58. [Single Choice] In WCDMA, a single HS-PDSCH code (one SF16 code) can provide maximum data rate up to?

384 kbps

960 kbps

1920 kbps

2 Mbps

59. [Multiple Choice] Which of the following description about HSUPA is correct?

HICH and RGCH are share a SF 256 OVSF code

SI information is sending on E-DPDCH

Only the served RLS can send RG UP, RG HOLD and RG DOWN, non-served RLS can only send RG HOLD and RG DOWN

The closed loop power control command for HSUPA is sending on E-DPCCH

60. [Multiple Choice] Which of the following description about HSUPA is correct?

HSUPA when using TTI=10ms, the maximum bit rate cannot exceed 2Mbps

E-DCH is an uplink common transport channel

Only when there is no DPDCH in uplink, E-DPDCH can use up to 4 OVSF code

HSUPA have introduced in 2 MAC entity, which MAC-es is in RNC, MAC-e in in NodeB


61. [Multiple Choice] Which of the following description about HSDPA is correct?

HS-DPDCH is used to feedback ACK/NACK and CQI information to the NodeB

HSDPA key technologies include AMC, HARQ, 16QAM, fast scheduling

The current HSDPA scheduling algorithm HUAWEI used is RR algorithm

HSDPA TTI can flexible change between 2ms and 10ms during fast scheduling

62. [Multiple Choice] In HSUPA, E-DPDCH is used to send L1 control information which include:

RSN

E-TFCI

Happy Bit

SI

V. Radio Resources Management

63. [Multiple Choice] In open loop power control of PRACH, the initial transmission power of the preamble is determined by which factors?

UL Interference

PCPICH DL TX Power

Constant Value

CPICH_RSCP

64. [Multiple Choice] What are the targets of WCDMA Power Control?

Transmit the power as big as possible to guarantee communication for each user Adjust transmit power to guarantee communication quality in uplink and downlink

Overcome Far-Close Effect

Overcome shadow and fast fading

65. [Multiple Choice] Load controls between cells include:

Inter-frequency cell load balance

OLC

Cell breathing

PUC

66. [Single Choice] The Potential User Control algorithm is to adjust the system parameters related to (___) based on the current load to select the optimal cell for users before access begins

Cell selection - reselection

Handover

Paging

Power Control

67. [Multiple Choice] Which of the below description about load control is correct?

Redirection information in RRC will be sending in message: RRC setup reject

Service DRD can be only proceed during RAB setup before RAN12

Queuing action should be perform before Preemption (if there is)

CAC algorithm only perform admission for 4 type of radio resources: Code, Power, CE and IuB

68. [Multiple Choice] Which of the below action can be used in Overload Control?

TFC Control

UE Transfer from DCH to FACH

UE release

BE rate reduce

69. [Multiple Choice] Which of the following action may be included in IAC process

CAC

DRD

Queuing

Rate negotiation

70. [Single Choice] Which of the following description is wrong about uplink Inner Loop Power Control?

If SIR measurements is greater than SIR target, than TPC = -1 to decrease the transmission power

If SIR measurements is lower than SIR target, than TPC = 1 to increase transmission power

Adjust DPCCH Transmission Power with DPCCH = TPC TPC_cmd

TPC_cmd is achieved by different algorithm


71. [Multiple Choice] Power Control is not adopted for which physical channel?

SCH

RACH

PCCPCH

DPDCH

72. [Multiple Choice] In soft handover optimization, which action can be benefit for reducing Ping-Pong handover?

Increase 1A & 1B hysteresis

Increase 1A & 1B threshold

Increase time to trigger length

Increase level 3 filter factor

73. [True/False] The difference between Soft Handover and Softer Handover; Softer Handover happen in the same NodeB and signal branches are combined in NodeB by using Selection Combination mode; Soft Handover happen in different NodeB and signal branches are combined in RNC by using Maximal Ratio Combination mode.

True False

74. [True/False] In IRAT handover procedure, RNC will send Active Set Update message to UE.

True False

75. [Single Choice] During soft handover, UE is in (___) state

CELL_PCH

URA_PCH

CELL_DCH

CELL_FACH

76. [Single Choice] About measurements report, which one is incorrect?

1B event means the quality of one cell in active set is worse than the best cell

1D event is triggered by the best cell change

1F event means the quality of a cell is lower than an absolute threshold

1A event means one cell signal quality is very close to the best cell or active set cells quality. UE will still report 1A event when active set is full


VI. Tools Experiences

77. [True/False] In Swap Project, we use iSwap tool to map the parameters and iConverter tool to map the neighbor relation

True False

78. [True/False] In measure report, it shows the CPICH Ec/No is 28, RSCP is 30, the the actual Ec/Io=-10(dB), actual RSCP=-85(dBm)

True False

79. [Multiple Choice] Which data can be imported into Assistant?

HUAWEI RNC Performance data

HUAWEI RNC Tracing data

Nemo test data

GENEX PROBE data

80. [Multiple Choice] While prediction with U-net, which can be generated without simulation?

Coverage by transmitter

Downlink total noise

Overlapping Zones

Coverage by signal level

VII. Huawei Hardware & Software Version Knowledge

81. [True/False] In RAN11, 64QAM max one user throughput is 21Mbps, 2x2 MIMO max throughput is 28Mbps

True False

82. [True/Flase] DBS3900 consist of BBU, MRFU, and RRU True False

83. [True/False] RRU 3804 max output power is 80W

True False

84. [True/False] In RAN 12, 64QAM + DC HSDPA max throughput of one user is a 42Mbps; 64QAM + MIMO max throughput is 42 Mbps

True False

85. [True/False] In RAN12, for DC (Dual Carrier) users, the UL channel could carry on the primary carrier and secondary carrier.

True False

86. [True/Flase] In RAN13, the max peak rate of one user in downlink is 84Mbps

True False

87. [True/False] Each RRU3908 can support maximum up to 4 UMTS carriers

True False

88. [True/False] In RAN12, Systematic Solution of Tackling Signaling Storm include: Smart UE state transition to reduce signaling; Improve RNC & NodeB Capability; Micro & Femto NodeB to offload signaling traffic; Specific and Professional service to ensure successful implementation

True False

Documents

Tutorial Assessment Huawei HCNA and HCNP 2014_Answers