tutorial assessment huawei hcna and hcnp 2014_answers
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Tutorial Assessment Huawei HCNA and HCNP 2014_AnswersTRANSCRIPT
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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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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
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Tutorial Assessment Huawei HCNA & HCNP Nexwave 2014
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