LTE VoIP 5G IOT Training

3G Network Solutions

LTE/IMS/IoT/5G Telecom Centre

header photo

3PCA;L2 MAC-RLC-PDCP Test (75 Marks)

Entry: 3PC-ENT - (24Hrs)
Associate: 3PCA-L1, 3PCA-L2, 3PCA-RRC, 3PCA-NAS - (60Hrs)
Professional: 3PCP-L1 3PCP-L2 3PCP-RRC 3PCP-NAS -(120Hrs)
1 In DRX, What channels does UE monitor in active period?

2 What are the Physical channels through which BCCH is carried through?

3 What are the Logical Channels Carried by UL-SCH?
4 What are the Logical Channels carried by DL-SCH?
5 What Logical channels are carried by PDCCH?
6 What Logical channels are carried in PUCCH Physical Channels?
7 When do you initiate MAC RA Procedure?
8 When is your Temporary C-RNTI gets converted to C-RNTI?
9 How many bits is C-RNTI?
10 How many groups of RA preambles are there in UE&eNB?
11 When is RA-Preamble-Group A picked up?
12 When is RA Preamble group B picked up?
13 During Random Acces, if paging comes, what acrion will UE take?
14 RA-RNTI = 1+t_id+10*f_id.       Explain what is t_id and f_id?
15 How do you know how many RAPIDs are there in RAR MAC PDU?
16 What is MAC-ContentionResolutionTimer –
17 What are the parameters in a RAR?
18 What is Backoff indicator in RAR?
19 What is RAR window?
20 If UE doesn’t receives contention resolution, when/how will it retransmit?
21 What is HARQ Entity?
22 What is HARQ Process?
23 What is the maximum entity allowed in each UE?
24 How many max HARQ processes required in each UE in FDD?
25 How many max HARQ processes required in each UE in TDD?
26 Why there is a dedicated MAC process for BCH?
27 What is the maximum time a UE will backoff for RA?
28 How many TTI's can be bundled together?
29 In Logical Channel Prioritization, what is Prioritized Bit Rate?
30 What is Bucket Size Duration?
31 What is the start and end activity in Contention Resolution?
32 How much is Bj incremented each TTI?
33 What is Buffer Status Report?
34 What is power headroom?
35 Rewrite channels/data priority order which MAC considers first - CCCH, any other LoCH, BSR, PHR,BSR with padding.
36 What channels are normally carried by TM?
37 What channels are carried by UM RLC?
38 What channels are carried by AM RLC?
39 Why RLC is recommended to do ARQ and not HARQ?
40 What is polling bit in RLC?
41 What is Poll_SN in RLC?
42 What is sliding window in RLC?
43 If any SN falls outside window, what is the action?
44 What is receiving window?
45 What are the two edge variables describing start/ends of window for AM?
46 What is msg3 buffer in Random Access?
47 How does RLC maintain the re-assembly point each cycle of re-assembly for AM?
48 What does re-assembly units do in RLC.
49 What are the various AM RLC SN sizes possible?
50 What are the various UM RLC SN sizes possible?
51 What is Frame Indicator? What are the possible indicators?
52 What is Resegmentation Flag RF?
53 What do you send in STATUS_PDU?
54 What is LSF Field indicate?
55 What is SO_start and SO_end?
56 What is t_Status_Prohibit?
57 What is Poll_PDU and Poll_Byte?
58 For a single voice call, how many MAC processes, RLC processes and PDCP processes will be there in one direction?
59 What is PRACH Resource Index?
60 How are Cyphering Keys generated?
61 What are the keys for Integrity and how are they generated?
62 Is ARQ or HARQ implemented in PDCP?
63 What is the maximum size of PDCP SDU recommended?
64 What is COUNT and what is it used for?
65 What is DRB and SRB?
66 When is SRB0 created?
67 When is SRB1 created?
68 When is SRB2 created?
69 What is FMS (First Missing SN)?
70 How is PDCP STATUS PDU sent?
71 What is MAC-I? How does it help?
72 What is ra-PRACH-MaskIndex?
73 What are the various PDCP SN sizes possible?
74 What are the Logical Channels carried through HARQ?
75 What are the Logical Channels NOT carried through HARQ?
76 What are the Physical Channels Terminate at MAC/Physical boundary and are irrelevant to the upper layers?