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3PCA-L1 - LTE Physical Layer Test (105 Marks)

3PC-ENT - Entry Overview Level (24Hrs)
3PCA-L1, 3PCA-L2, 3PCA-RRC, 3PCA-NAS, - Associate/Amateur Level (60Hrs)
3PCP-L1 3PCP-L2 3PCP-RRC 3PCP-NAS - Professional Level (120Hrs)

1 What is the content of the cyclic prefix?
2 How wide is the MBMS subcarrier in kHz?
3 How many symbols are there in 1 millisecond in Random Access subcarrier?
4 What does CSI consist of?
5 What information is derived out of PSS/SSS signals?
6 Where are PSS/SSS mapped in Physical resources?
7 Where is PBCH mapped? How many RB's do they occupy?
8 Describe briefly how, where and how many padding “0” bits are inserted in code segmentation.
9 Can control information be sent on PUSCH without UL-SCH data?
10 What is the CRC length, total number of segments, Encoder type and Modulation for PBCH?
11 In which CSI transmission case PUCCH is used?
12 CQI is 4 bits. What does 0, 1 and 15 indicate respectively.
13 How many DMRS are there in a RB in a PUCCH of type 1/1a/1b and of type 2/2a/2b?
14 Explain why a mobile with speed more than 500Km/Hour will fail to remain connected with LTE?
15 What is a preamble format? How many types are there? Explain when which type of format is suitable?
16 What is the length of preamble sequence in bits and how many RB's are required to send?
17 what are the values transmitted as CSI?
18 What is SRS and where is it physically mapped? Explain.
19 What is sent in DCI format 0?
20 How many symbols and REGs does PCFICH occupy?
21 how many REGs does one PHICH occupy and where in the DL Physical Resource?
22 How many mobiles PHICH can be sent in the same symbol and how are they multiplexed?
23 How is PHICH and CFICH allocated in different cells so that they avoid interference. Show it pictorially to explain.
24 In case of 4x4 MIMO, how many reference signals are there in an RB?
25 What is the %tage occupied by Ref signals in 4x4 MIMO case?
26 In FDD, the UL and DL frame timing is slightly skewed in time and who is earlier by how much?
27 Which are the Physical signals sent in UCI?
28 Which are the signals sent in DCI?
29 What are the valid CRC length in bits?
30 For a buffer of length 6140 from MAC (TTI), what is the number of segments? Why?
31 Which channel case Turbo coding is used?
32 which channel case BitRepeatationCoding is used?
33 What is the smallest and biggest segment size for Encoding?
34 For Turbo Encoder - If block size is 80, what is the number of output bits.
35 For Convlutional Encoder- If block size is 80, what is the number of output bits?
36 How many trellis bits are additional terminated with and with which streams?
37 What is Trellis Termination for Turbo Encoder?
38 Total Number of bits G and mapped onto G'=G/(L*M) symbols. What is L and M?
39 For Turbo coding rate matching, data block is to be spread in how many columns?
40 What are the control information multiplexed with data of PUSCH?
41 what are the control information interleaved together with PUSCH?
42 How many Symbols are used for PUSCH in a SRS subframe per subcarrier, including multiplexed CQI.
43 For DL-SCH, PMCH and PCCH, what is CRC length,number of segments, Encoder type and modulation?
44 What is the CRC length for CFICH and PHICH respectively?
45 What kind of encoder is used for CFICH and PHICH?
46 For RAR, how many bits is TA?
47 If the TA is 25 in the RAR, what is the TA adjustment required in microseconds?
48 How many bits is TA adjustment for non-RAR Timing Advance?
49 If the TA value is 25(decimal), how much milli/ microsecond timing is to be adjusted?
50 If TA=25, Is the timing to be increased or decreased?
51 Normally, when should the TA adjustment should take place, if you receive it in subframe x?
52 If you receice a Scell Activation or De-activation in subframe x, when should that be effective?
53 In EPRE calculation what is the relationship with Cyclic Prefix?
54 What are the main factors in calculation of Power for PUSCH? List them.
55 What are the 3 parameters, based on which scrambling code is generated?
56 What is the max TPC accumulation(dbm) value in both +ve and -ve direction?
57 What is Power scaling factor?
58 Cell Parameter P(B) is denoted by ρ(B)/ρ(A). What are these 3 parameters w.r.t. symbol EPRE?
59 What is the maximum P(B)?
60 List the parameters UE must have before Random Access?
61 What are the factors which determine the initial RA power?
62 After getting RAR, What do you send to eNB?
63 First L3 message after RAR is sentafter how long delay from RAR?
64 If you do not receive RAR within RAR window, after/before what delay would you retransmit?
65 What is the significance of "UL delay" and "hopping flag" in RAR?
66 What is the max number of DL HARQ processes for FDD and TDD in UL/DL both?
67 How many Maximum bits are there for PUCCH of format 1/1a/1b and 2/2a/2b each and they are spread in how many symbols?
68 Explain difference between Resource allocation type 0 and 1?
69 What is RBG(Resource Block Group) and size of each RBG?
70 What are the parameters defining the TBS size?
71 What is the minimum(with minimum modulation) and Maximum(with maximum modulation) TBS (Transport Block Size) for one layer.
72 If for single layer TBS size is "X", will the TBS size be n.X for n layers? Why?
73 What are CSI elements?
74 What is Periodic and Aperiodic CSI?
75 Max how many MACs can be configured for TTI bundling?
76 In a group hopping, how many hopping patterns are there and how many sequence shift-patterns?
77 For every subframe of PUSCH how is ack/nack sent?
78 for every PDSCH, when/how is the ack/nack sent?
79 List the types of RNTI (with their default values, if any).
80 What are parameters defining SRS?
81 What is the difference between type 1 and type 2 hopping?
82 What is difference between intra-subframe and inter-subframe hopping?
83 What are the 4 configurations of CCE?
84 How will you find number of PDCCH accomodatable in a subframe?
85 What is Common Search space?
86 What is UE-Specific Search Space?
87 How is PHICH assigned on the control region?
88 How is CFICH assigned in the control region?
89 How many PUSCH DMRS RE's are there in a RB in a subframe?
90 Where are DMRS mapped on the PUSCH RB in a subframe?
91 What is cyclic shift?
92 How is cyclic shift it used for PHICH or other control information among UE's?
93 What is the spreading factor used for PHICH after repeat encoding?
94 In PHICH what is the total number of symbols occupied?
95 DL Phy Layer transmission is Synchronous or asynchronous?
96 UL Phy Layer transmission is Synchrnous or Asynchronous?
97 What is semi-persistent scheduling?
98 How many bits are used to send Scheduling Request in PUCCH?
99 How is SR sent and multiplexed with other control information?
100 How many users can be multiplexed in format 1 and format 2 PUCCH respectively on the same RB?
101 In rel-10 how many antenna max assumed for UE?
102 In rel-10 How many antenna max in eNB?
103 How many types of reference signals are there in Downlink? List them.
104 In case of 4 antennas with 4x4MIMO, maximum how many codewords and layers can be configured?
105 In DRX, What channels does UE monitor in active period?