Overview – Radio Access Networks Associate Certification
Areas
RAN Fundamentals
RAN Evolution
RBS and Site Solution
RAN Transport
RAN Controllers
OSS Fundamentals
› RAN Fundamentals › RAN Evolution
› RBS and Site Solution › RAN Transport › RAN Controllers › OSS › GSM RAN › WCDMA RAN › LTE RAN
› General RAN architecture › Radio design principles › Air interface principles
› Signaling, protocols and layers › Radio network functionalities › RAN performance
§ Industry technology evolution and trends
§ Technologies together contributing to mobile operator business evolution § Value add of one common RAN / EVO RAN
§ RBS product types and characteristics, basic technology and architecture of RBS building modules and their function. § Site solution principles, products, solution concepts, function and characteristics
§ Main advantages/values, impacts on RAN performance and OPEX reduction § Basic technology and characteristics
§ Architecture and Interfaces, § Synchronization solutions
§ Main advantages/values with IP RAN Solution and impacts on RAN performance
§ BSC and RNC, products and features, architecture of building blocks and their function § Main advantages/values
§ The role of OSS in Ericsson business support system, functionalities and features § Main advantages/values, impacts on RAN performance and OPEX reduction. GSM RAN Fundamentals
› Technology and characteristics
› Products, solutions, functionalities and features › Main advantages/values
WCDMA RAN Fundamentals
§ Technology and characteristics
§ Products, solutions, functionalities and features § Main advantages/values
LTE RAN Fundamentals
§ Technology and characteristics
§ Products, solutions, functionalities and features § Main advantages/values
Technologies together contributing to mobile operator business evolution
RBS product types and characteristics, basic technology and architecture of RBS building modules and their function. Site solution principles, products, solution concepts, function and characteristics
Main advantages/values, impacts on RAN performance and OPEX reduction
Main advantages/values with IP RAN Solution and impacts on RAN performance
BSC and RNC, products and features, architecture of building blocks and their function
The role of OSS in Ericsson business support system, functionalities and features Main advantages/values, impacts on RAN performance and OPEX reduction.
Main Topic
LTE Technology
Session
LTE Fundamentals (NSL744752)
Ericsson LTE Features, Parameters, Counters, & KPIs (PQL841734) TAC and PCI Planning (SLP971237)
Integrating LTE RBS with DAS (FLQ110283) RBS Configurations (KSM164752)
OSS (LPP076088)
IRAT Trial and Analysis (MLS482067) CSFB
Session
LTE EPS Overview
System Engineering End to End Approach LTE Road Map
LTE Basic Features Description
RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution RAN Evolution
Random Access Power Control Intra-LTE Handover
Automated Neighbor Relations (ANR)
Coverage-Triggered CDMA-eHRPD Session Continuity Inter-Frequency Handover
PM-Initiated UE Measurements
LTE Tuning and Optimization
Retainability UETR/CTR and parsers
Statistics and KPIs
ENIQ and KPI formulas ITK
UE Logging and Post Processing
TEMS Investigation and Discovery
LTE Tools
TIPP-L (MHQ453384) MCOM (HDL401151) TEMS Discovery (KNK245732)
ITK (HPD300740)
NEMO Learning Session (HJG517251) Actix
Actix Advance Neo ERTT & Audits
Actix
Advance Discovery I Advance Discovery II
Details Evolution of Ericsson Radio Access NW (WBL) - Radio Access NW /EVO
RAN transformation and modernization (WBL) - Radio Access NW /EVO RAN modernization (WBL) - Radio Access Networks Academy/EVO RAN HetNet, (WBL) – WCDMA Academy, RBS Academy
Ericsson RAN advantages (WBL) – GSM Academy
Mobile broadband commercial strategy (WBL) - Radio Access NW /EVO Boosting MBB with efficient spectrum refarming (WBL) - GSM Academy Mobile Broadband - Enhanced Uplink Evolution (WBL) – WCDMA Academy One Pipe – IP RAN Academy
Access Networks, an Overview (WBL) – Radio Access NW Academy Networking Basics, an Overview (WBL) – LTE Academy
Evolution of Ericsson Radio Access NW (WBL) - Radio Access NW /EVO RAN transformation and modernization (WBL) - Radio Access NW /EVO RAN modernization (WBL) - Radio Access Networks Academy/EVO RAN Mobile broadband commercial strategy (WBL) - Radio Access NW /EVO Boosting MBB with efficient spectrum refarming (WBL) - GSM Academy Mobile Broadband - Enhanced Uplink Evolution (WBL) – WCDMA Academy One Pipe – IP RAN Academy
PPM of 2012 (video & WBL´s)
TEMS Cellplanner for LTE Overview
http://streaming.internal.ericsson.com/user/global_player/player.htm?program=11050994
http://learningcontent.internal.ericsson.com/courses/content/LTE-EPC/LTE/LTE031%20-%20LTE%20SON%20Overview/centra/start.exe
http://learningcontent.internal.ericsson.com/courses/content/LTE-EPC/LTE/LTE006%20SON%20Detailed%20Functionality%20in%20L10/player.html
Playback Link
Playback Link
LTE Basic Features Description
o OSS-RC functionality for LTE (Centra) – LTE Academy
o Total Network Performance – ENIQ (WBL) – OSS Academy/Assurance
o The Importance of OSS in Self Organizing Networks - OSSAcademy/PBO
o SON Overview (WBL) – LTE Academy
o SON detailed functionality (WBL) – LTE Academy
o PPM of 2012 (video & WBL´s) https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66c922 https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66c927 https://host3.sabameeting.com:443/GP/main/000000fa39d70000012dacddca56c91c https://host3.sabameeting.com:443/GP/main/000000fa39d70000012dacddca56c922 https://host3.sabameeting.com:443/GP/main/000000fa39d70000012dacddca56c927 https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66cdef https://host3.sabameeting.com/GP/main/000000e2ecc70000012efd86d2c69a9f https://host3.sabameeting.com:443/GP/main/0000015e92d70000012fd85543e19b95 https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718cba https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718cbf https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8f9f
LTE Tuning and Optimization
UE Logging and Post Processing
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Question
Describe the Site Design Procedure in Order.
1. What type of traffic is managed by logical A interface? 100.Why frequency synchronisation is used in RBS? 101.Use of time and phase synchronisation in RBS? 102.Which polarization is used in antenna transmission. 104.RBS3820 is better than RBS 3810 why?
106.WHAT IS THE IMPACTS OF 2X2 mimo TRASMISSION like that. 107.Cell breathing?
108.functionas of EVO RAN? 109.funcion of TIU?
11. What is the definition of a connected user in LTE? -110.function of TCU?
111.Ericsson mSMM?
112.What are the advantages of rbs 6601? 12. What does VAMOS provide?
13. What is the main benefit of upgrading an RBS3000 with DUW? 14. What information can be obtained from CPICH?
15. What are 2 purposes of power control in WCDMA systems?
17. What is a softer handover?
2. What are 2 procedures that characterize idle mode behaviour? 20. What is Ericsson definition of a Channel Element?
21. What is a Multi Standard Radio?(Choose 2)
22. What is the benefit of an all IP RAN in a multiRAN solution? 23. What is a HetNet?(Choose 2)
24. What is an Evo RAN?
25. What is Ericsson AIR solution? 26. How does OSS save OPEX?
-3 Characterstics of Radio KPI
10. How can an existing GSM/WCDMA operator offer voice services when LTE is introduced?(Choose 2)
-103.which unit is connected to handle, sw,rr management in rbs 2000?
105.ue is connected in cs network, but cannot make call.Effected KPI?
16. What are 2 aspects of Automatic Neighbor Relation (ANR) as per Ericsson implementation? (Choose
2)-18. Each timeslot on TDMA frame is a physical channel. How many physical channels per GSM carrier frequency?
-19. What are the 2 limiting factors on capacity of a GSM cell? (Choose 2)
-27. What technologies are supported by RBS 6000 series?(Choose 3)
-28. What parameter is to be considered while dimensioning battery backup capacity for an RBS?
-29. What are the 2 main drivers of an In-building solutions? (Choose 2)
-3. What are NAS messages? - Messages between UE and Core Network
30. What is the main purpose of a TMA? 31. Which are the 2 logical interfaces in LTE?
-32. which two interface are connected to BSC
node34. Electrical Tilt increased which 2 KPI will be affected 36. Three types of Handover in WCDMA
?--37. Baseband Unit in RBS
6000?--38. what is the use of OBIf unit in RBS 3000? 39. what is Evo controller multi node?
4. What are 2 functionalities of RNC & BSC? -40. Protocaol on Iu interface?
42. which mode shows reliable data transfer to the target?--43. Difference Between HD BSC and EVO 8100?
44. which KPI is affected due to congestion in network? 45. Which release of 3GPP does LTE come under?
46. Which KPI can be improved by optimizing Neighbour Relations? 47. What is the procedure for gaining access to system called? 49. Identify two Propagation models among the the options given? 50. What are functionalities of CQI (Choose 2)?
51. What kind of data can be carried by physical channels? 52. What are the advantages of AMR?
53. What is frequency Reuse?
54. Which is the stage after integration and before launch?
55. Which Unit in RBS6000 is responsible for IP packet routing? 33. Characteristics of Abis for VAMOS and Edge Evolution?(Choose
2)--35. After Optimisation Uplink throughput increases which KPI affected
?--41. Difference between Link budget of WCDMA and LTE? A. Antenna Gain
B. UL Sensitivity
C. Penetration Loss
D. Radio wave propagation - Think UL sensitivity, due to soft HO gain, not sure
48. Which Layer is responsible for Modulation and Radio Measurements?
5. What are 2 elements that limit throughput according to Shannon's Theorem?
-57. Why is frequency synchronization important in RBS? 58. What is the function of TIU?
6. What air interface access technology is used in uplink LTE?
-60. What is the role of Primary Scrambling code in WCDMA? 61. What is the layer 2 protocol on User Plane?
63. What is the Spreading Factor of HSPDSCH? 64. EVO controller supports which of the following?
68. What are the benfits of multi Antenna in LTE? 69. What is the order of Network Roll out?
7. What are 2 reasons that trigger compressed mode?
-73. Reasons for calculating Link Budget.?
74. What Are the main Difference betwn Quality of service classes 56. What is the importance of time and phase synchronization in LTE?
59. What is the difference in traffic carried by Evoc8100/BSC & Evoc8200/BSC?
-62. What is the process of selection of a suitable candidate during new site roll out? (same question in some diff words)
-65. Which 2 areas an operator can benefit using Ericsson Site Controller & Ericsson Remote Site controller?
A. Efficient blackhaul planning B. Energy management
C. Improved Cell capacity D. Site security
Not sure
66. What are the characterestics of TCU? Choose two A. Queue in Queue (C-VLAN and S-VLAN)
B. IP over TDM C. TDM over IP D. Traffic policing B,C not sure
67. How is frequency synchronization achieved in TCU? (something like that)
A. Hold over time in TCU is greater than hold over time in DU B. TCU has higher frequency precision
C. Simplifies the synchronization recovery procedure D. Possiblity to control different synchronization methods
70. The HW unit that is used as interface from RBS6000 and the transport ?
-71. What is true related to dB? a. dBm is relative to 1mW b. dB is unitless
c. dBi is directional gain of antenna
d. 3dB gain means 4 time increase in value ANS - A,B,C
72. The factors that affect the IP network? (Something like that) (Choose 3)
-75.Which Factors Defines Cell peak LTE Thruput.
77.What is Cell Breathing?
78.Main Difference between GPRS and EGPRS
79. Dimension of Resource Block in time and freq domain? 8. How does the UE estimate the radio quality of an LTE cell? -80.what is the radio performance benefit of AIR? ~
83.What are the product included in IPRAN reference Solution? 84. What is the basic difference between UE Category?
85.What is the benefit of VAMOS?
86.what is Radio Resource management?
87.What is Ericsson Solution to Minimize Footprint? 88.what is spectrum refarming?
89.Error Detection in Air interface is done by?
9. What modulation offers the highest speed for EGPRS? -90.what is one transport Pipe?
91.Radio Frame in LTE?
92. RNC3820 advantage / Difference for RNC3810 93. Use of TIU in RBS6000
94. Which battery is good in fluctuating AC Grid
Advantages of IP RAN
Baseband Unit Name in RBS 6000 Series. Benefits of NMS.
BSC & RNC Functionalities BSC Functionalities
BSC Functionalities
EVO controller 8200 W12 Capacity How Syncronisation is Achieved over IP Maximum Carrier support by RRUS 11 Multi antenna Advantages
Protocol on Iur
RAN Syncronisation Methods SF used in HS-PDSCH
synchronization is more sensitive by which factor TCU Supports which Functionalities
76.which board in EnodeB is for processing radio Resource management function in LTE?
81.Benifit of EVOC8200 BSC when compared to EVOC8100/HD BSC?
95. Queuing is happening in UMTS N/w. User will be effected in which ways? (Choose 2)
96. Effect of Smartphone in UMTS? 1. Control increased usage
2. Sharing of more cells at same time
3. Usage of resources (Have 1 more option, Need to select one) 97. IuB Connection Unit in RBS6000
1.DUL 2.DUG 3.DUW 4.TIU
98. UE is in Idle state but not able to make call.. Effected KPI? A.Accessbility B. Retainability C. Availability D. Intergrity 99. Layer2 Control Plane protocols
TCU/SIU Function's
Voltage of RU in RBS 6000. What are site Survey's Done for. what does TCU brings to RBS
what is Board Handling User Plane Traffic in RNC 3820. what is GSM OMT tool does.
what is GX interface What is HWAC
What Iur Link Used For.
Which 2 Techniques make most of the Spectrum Utilisation.
Which Device is Used to combine Different 3GPP Frequency Bands. which KPI affects UL throughput
Which Layer 2 Protocol Work on User plane.
which Modulation scheme is more sensitive to Interference.
what is the advantage of allowing the TCU-02/SIU 02 to distribute the frequency synchronisation to the DUs ??
Answer
BSC to Core Network Voice Traffic.
Cross polarization
A user that has RRC connection
Transfer data of different RAN over IP
Very small Indoor Main unit which can inserted in existing Macro RBS itself Capability to achieve upto 32 speech channels per TRX
An increase in the physical Channel Elements Scrambling code
Managing power capacity and Reducing interference
The UE connected to 2 cells in the same RBS 8 time slots/physical channels per frequency
Number of installed TRX and Number of available frequencies Location area update and Cell Reselection.
CE is a measure of board capacity and radio bearer (RB) capacity cost
Reduced deployment costs and savings on OPEX
It’s a RAN that supports multiple radio access technologies as per 3GPP
LTE, CDMA & Wifi
The power consumption of the RBS at maximum radio power output Delay,packet loss,
Messages between UE and Core Network
Businees meeting-Planning-Integration-Initial Tuning-Launch-Optimization
LTE is packet switched implying voice can be carried through VoIP and legacy GSM/WCDMA systems to carry
It’s a RAN that the node must supports multiple radio access technologies as per 3GPP
ANR is to add neighbors based on UE measurements for optimization,
initial neighbor plan required
It’s a hardware unit capable of sharing its transmitter between different radio access technologies and is a common 3GPP specification for GSM, WCDMA & LTE
It’s a network topology of different radio access technologies co-existing together with small cells embedded in larger cell coverage area
- network topology where small cells are used to offload macro cells A single unit combing antenna with the active radio part to simplify installation process in difficult site locations.
By the introduction of Self Organizing Networks functionality within the OSS portfolio
Dedicated in-building systems offload macro network and majority of mobile broadband traffic is located within buildings
To improve the uplink coverage
S1 & X2
GB and A interface
Accesibility & Retainability Integrity
Soft/Softer/IRAT DU
Alaram handling
A node sharing its resources for GSM & WCDMA Traffic RANAP
UL Sensitivity & Radio wave propagation
Connection oriented / Acknowledge mode
Accesibility Release 8 Retainability Random Access Physical Layer
Signal to Noise Ratio (SNR) and Bandwidth Speech, Data & Signalling
The use of limited number of frequencies within a given area
Initial Tuning
TCU
1. Packet Abis (Abis Optimization or Abis over IP) 2. Edge enabled TRX
Handling Radio Resource management & RBS control, Mobility management
IP Supported/ BSC that is RNC Prepared
Okumura- Hata & Cost231
Reported by UE to the node B & Used by scheduler for Radio Resource scheduling
Time-GPS,Phase-NTP
Ossiclator
Transport Interface Unit twice
SC-FDMA
To identify cells in DL and Users in UL MAC
Site Survey 16
5 options given, select 3, answer is all except AXE & APZ
C. TDM over IP
Hold over time in TCU is greater than hold over time in DU
higher data rates & improves coverage Weak 3G coverage (IRAT) and Pilot pollution
DU
Delay, Delay Variation & Packet Loss Coverage, Cell Radius
Buisness Plan> Design > installation > integration > initial tunning >Launch> optimization
a. dBm is relative to 1mW b. dB is unitless
Variation in coverage of a cell due to changes in number of users 0.5ms & 180Khz
By measuring the reference signal 1dB Better in UL and ~1dB better in DL
Multi Standard on common board Smart Edge and TCU
Support Modulation & Max Transport Format It doubles GSM Capacity
Separating a chunk of frequency from existing frequencies for LTE
CRC 8 PSK
One common pipe for GSM, WCDMA,& LTE 10ms
TIU
Accessbility OPEX
DUW-Digital Unit WCDMA
6000 RBS/20000 Cells, 8* 10 GE Ports, 8 Ports STM-1 4
RNSAP
BER
Transfer data of different RAN over IP
RBS 6102 with integrated pwr & battery backup, RBS 6101 with pwr with Battery base unit(BBU)
Openness, adaptibility, expandability, precise, practicability & flexibility
Handling Radio Resource management & RBS control, Mobility management
SoIP- (Main experience today is from NTP), PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode)
Options are - Improve coverage,redundency, / beam forming, spatial diversity, Tx & Rx div
SoIP, PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode)
HS-PDSCH SF 16, The Downlink HS-SCCH is a fixed rate (60 kbps, SF=128) , HS-DSCH SF 16
-48 V DC
SPB
GSM site Online monitoring tool Hardware Activation Codes for TRX
Hold over time in TCU is greater than hold over time in DU for SHO bet RNCs
Modulation/MIMO
duplex filters / RF & Microwave band pass filters
Integrity
MAC 64 QAM
Option-TDM / Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution
Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution
on-line policy interface between the GGSN and the charging rules function (CRF)
Jatin's Answer
BSC to Core Network Voice Traffic.
To avoid sync loss and delay spreading
UE sync
Cross polarization
Accessbility
Improved throughput
Shrinking of n/w on basis of loading
A user that has RRC connection
Transfer data of different RAN over IP
Capability to achieve upto 32 speech channels per TRX An increase in the physical Channel Elements
Scrambling code
Managing power capacity and Reducing interference
The UE connected to 2 cells in the same RBS 8 time slots/physical channels per frequency
Number of installed TRX and Number of available frequencies Location area update and Cell Reselection.
Reduced deployment costs and savings on OPEX
LTE, CDMA & Wifi
Delay,packet loss,
Messages between UE and Core Network
Businees meeting-Planning-Integration-Initial Tuning-Launch-Optimization
LTE is packet switched implying voice can be carried through VoIP and legacy GSM/WCDMA systems to carry
It’s a RAN that the node must supports multiple radio access technologies as per 3GPP
Very small Indoor Main unit which can inserted in existing Macro RBS itself
ANR is to add neighbors based on UE measurements for optimization, initial neighbor plan required
CE is a measure of board capacity and radio bearer (RB) capacity cost
It’s a hardware unit capable of sharing its transmitter between different radio access technologies and is a common 3GPP specification for GSM, WCDMA & LTE
It’s a network topology of different radio access technologies co-existing together with small cells embedded in larger cell coverage area
- network topology where small cells are used to offload macro cells
It’s a RAN that supports multiple radio access technologies as per 3GPP
A single unit combing antenna with the active radio part to simplify installation process in difficult site locations.
By the introduction of Self Organizing Networks functionality within the OSS portfolio
The power consumption of the RBS at maximum radio power output
1) Dedicated IBS to offload macro N/w
To improve the uplink coverage in a location S1 & X2
GB and A interface
1. Packet Abis 2. Edge enabled TRX Accesibility & Retainability
Integrity
Soft/Softer/IRAT DU
Alaram handling
A node sharing its resources for GSM & WCDMA Traffic RANAP
UL Sensitivity
Acknowledge mode
IP Supported/ BSC that is RNC Prepared Accesibility
Release 8 Retainability Random Access Physical Layer
Okumura- Hata & Cost231
Signal to Noise Ratio (SNR) and Bandwidth Speech, Data & Signalling
AMR encodes narrow band to varialble
The use of limited number of frequencies within a given area
Initial Tuning
TCU
Handling Radio Resource management & RBS control, Mobility management
Reported by UE to the node B & Used by scheduler for Radio Resource scheduling
For sync of UE
Ossiclator
Transport Interface Unit twice
SC-FDMA
To identify cells in DL and Users in UL MAC
Site Survey 16
5 options given, select 3, answer is all except AXE & APZ
A. Hold over time in TCU is greater than hold over time in DU
higher data rates & improves coverage
Weak 3G coverage (IRAT) and Pilot pollution
DU
Delay, Delay Variation & Packet Loss
Coverage, Cell Radius
B. Energy management D. Site security
C. TDM over IP D. Traffic policing
Buisness Plan> Design > installation > integration > initial tunning >Launch> optimization
a. dBm is relative to 1mW b. dB is unitless
Bandwidth and Users
Variation in coverage of a cell due to changes in number of users Enhanced GPRS > Higher data rates available 384 KBPS
0.5ms & 180Khz
By measuring the reference signal
1dB Better in UL and ~1dB better in DL
Multi Standard on common board
Smart Edge and TCU
Support Modulation & Max Transport Format
It doubles GSM Capacity
Separating a chunk of frequency from existing frequencies for LTE CRC
8 PSK
One common pipe for GSM, WCDMA,& LTE 10ms
Throughput and buffering
TIU
Accessbility
OPEX
DUW-Digital Unit WCDMA
6000 RBS/20000 Cells, 8* 10 GE Ports, 8 Ports STM-1 4
RNSAP
BER
Transfer data of different RAN over IP
RBS 6102 with integrated pwr & battery backup, RBS 6101 with pwr with Battery base unit(BBU)
Openness, adaptibility, expandability, precise, practicability & flexibility
Handling Radio Resource management & RBS control, Mobility management
SoIP- (Main experience today is from NTP), PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode)
Options are - Improve coverage,redundency, / beam forming, spatial diversity, Tx & Rx div
SoIP, PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode)
HS-PDSCH SF 16, The Downlink HS-SCCH is a fixed rate (60 kbps, SF=128) , HS-DSCH SF 16
-48 V DC
SPB
GSM site Online monitoring tool
Hardware Activation Codes for TRX
for SHO bet RNCs Modulation/MIMO
duplex filters / RF & Microwave band pass filters
Integrity
MAC 64 QAM
Option-TDM / Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution
Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution
on-line policy interface between the GGSN and the charging rules function (CRF)
SUB BATTERY EGPRS EGPRS EVO EVO EVO EVO EVO EVO EVO EVO GSM GSM GSM ANTENN A
GSM GSM GSM GSM GSM GSM GSM GSM IBS LTE LTE LTE
LTE LTE LTE LTE LTE LTE LTE LTE LTE LTE LTE LTE LTE MIMO MSMM NMS OSS RAN RAN
EVO RBS RAN RAN RAN RAN RAN RAN RAN
RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN
RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN
RAN RAN RAN RAN RAN RAN RBS RBS RBS
RBS RNC RBS RBS RBS RBS RBS RBS RBS RBS RBS RBS RBS RBS RNC RNC RBS RBS
RBS RBS RBS RBS RBS RBS TMA VAMOS wcdma wcdma
wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma wcdma
EVO RAN EVO RBS RBS BATTERY BATTERY OSS LTE
wcdma GSM RAN RAN TRAN. RAN LTE RAN RAN RBS RAN BATTERY RBS LTE RBS RAN wcdma LTE wcdma RBS RBS
GSM RAN RAN wcdma EVO GSM
RAN_Question
Which polarization is used in antenna transmission. Which battery is good in fluctuating AC Grid
What modulation offers the highest speed for EGPRS ? Main Difference between GPRS and EGPRS
Difference Between HD BSC and EVO 8100? What is EVO 8100 multimode
what is Evo controller multi node?
EVO controller 8200 W12 Capacity
functionas of EVO RAN?
What type of traffic is managed by logical A interface ?
What are 2 procedures that characterize idle mode Mobility ? What does VAMOS provide
Benifit of EVOC8200 BSC when compared to EVOC8100/HD BSC?
What is the difference in traffic carried by Evoc8100/BSC & Evoc8200/BSC?
-EVO controller supports which of the following? - 5 options given, select 3,
What are the 2 limiting factors on capacity of a GSM cell which two interface are connected to BSC node?
what is GSM OMT tool does
What are the advantages of AMR?
What is AMR
What is frequency Reuse?
What air interface access technology is used in uplink LTE? How does the UE estimate the radio quality of an LTE cell ?
Each timeslot on TDMA frame is a physical channel.How many physical channels per GSM carrier frequency?
Characteristics of Abis for VAMOS and Edge Evolution?(Choose 2)--Edge timeslot/flexi FR and HR/flexi Abis/Packet Abis--- Need to Confirm
What are the 2 main drivers of an In-building solutions? Choose 2
How can an existing GSM/WCDMA operator offer voice services when LTE is introduced ? Choose 2
What is the definition of a connected user in LTE
Which are the 2 logical transport interfaces for an LTE system
Diff between H-PCRF & L-PCRF
Which Factors Defines Cell peak LTE Thruput.
Dimension of Resource Block in time anf freq domain? what is the radio performance benefit of AIR?
what is spectrum refarming?
Which release of 3GPP does LTE come under? What are the benfits of multi Antenna in LTE? -Radio Frame in LTE? 10ms
WHAT IS THE IMPACTS OF 2X2 mimo TRASMISSION like that. Ericsson mSMM?
Benefits of NMS
How does OSS save OPEX What are NAS messages ?
What is the benefit of an all IP RAN in a multi-RAN solution
What are 2 aspects of Automatic Neighbor Relation (ANR) as per Ericsson implementation ?choose 2
What is the importance of time and phase synchronization in LTE?
which board in EnodeB is for processing radio Resource management function in LTE?
What is an Evo RAN transport
What is Ericsson AIR solution
which KPI is affected due to congestion in network?
which mode shows reliable data transfer to the
target?--Difference between Link budget of WCDMA and LTE?
Electrical Tilt increased which 2 KPI will be affected ?--41. Difference between Link budget of WCDMA and LTE? A. Antenna Gain
B. UL Sensitivity
C. Penetration Loss
D. Radio wave propagation - Think UL sensitivity, due to soft HO gain, not sure
Which Device is Used to combine Different 3GPP Frequency Bands?
After Optimisation Uplink throughput increases which KPI affected
?--Which Layer 2 Protocol Work on User plane
which Modulation scheme is more sensitive to Interference 3 Characterstics of Radio KPI
Advantages of IP RAN BSC Functionalities
BSC & RNC Functionalities
Which is the stage after integration and before launch? What are site Survey's Done for
Which 2 Techniques make most of the Spectrum Utilisation
which protocol between two RNC What is HWAC
RAN Syncronisation Methods?
SoIP, PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode)
Multi antenna Advantages ?
Choose 2. (beam forming, spatial diversity, Tx & Rx div or Improve coverage,redundency)
Describe the Site Design Procedure in Order ? Or What is the order of Network Roll out?
What is the process of selection of a suitable candidate during new site roll out? (same question in some diff words) - Site Survey
Which Layer is responsible for Modulation and Radio Measurements?
what is GX interface
which KPI affects UL throughput Frequency synchronization
Use of time and phase synchronisation in RBS? synchronization is more sensitive by which factor Reasons for calculating Link Budget.?
What Are the main Difference betwn Quality of service classes What is Cell Breathing?
What is the basic difference between UE Category?
what is Radio Resource management?
Error Detection in Air interface is done by? what is one transport Pipe?
What is the procedure for gaining access to system called?
Identify two Propagation models among the the options given? What are functionalities of CQI (Choose 2)?
What kind of data can be carried by physical channels?
Which KPI can be improved by optimizing Neighbour Relations? Retainability
What is a Multi Standard Radio?(Choose 2)
-Why frequency synchronisation is used in RBS?
Which 2 areas an operator can benefit using Ericsson Site Controller & Ericsson Remote Site controller?
A. Efficient backhaul planning B. Energy management
C. Improved Cell capacity D. Site security
Not sure
What is true related to dB? a. dBm is relative to 1mW b. dB is unitless
c. dBi is directional gain of antenna
d. 3dB gain means 4 time increase in value ANS - A,B,C
The factors that affect the IP network? (Something like that) (Choose 3)
-UE is in Idle state but not able to make call.. Effected KPI? A.Accessbility B. Retainability C. Availability D. Intergrity 99. Layer2 Control Plane protocols
-a. RRC b.RLC c.PDCP d.MAC
UE is connected in cs network, but cannot make call.Effected KPI?
What parameter is to be considered while dimensioning battery backup capacity for an RBS
Baseband Unit in RBS 6000?-- DU/DXU/RU/? Voltage of RU in RBS 6000 ?
What is Ericsson Solution to Minimize Footprint? Choose 2 What are the advantages of RBS 6601?
What is the main benefit of upgrading an RBS3000 with DUW what is the use of OBIf unit in RBS 3000?
which board is used in RBS3000
what is Board Handling User Plane Traffic in RNC 3820? RNC3820 advantage / Difference for RNC3810
Maximum Carrier support by RRUS 11
which unit is connected to handle, sw,rr management in rbs 2000?
RNC 3820 is better than RNC 3810 why?
Which Unit in RBS600 is responsible for IP packet routing?
Which 3 technologies are supported by RBS 6000 series?
(Choose 3) LTE/DVB-T/CDMA/WiFi/WiMax.
The HW unit that is used as interface from RBS6000 and the transport ?
Use of TIU in RBS6000
IuB Connection Unit in RBS6000
1.DUL 2.DUG 3.DUW 4.TIU
what does TCU brings to RBS ? Transport connection unit,
to other RBSs,
to support sync tech,
TCU Supports which Functionalities
What are the product included in IPRAN reference Solution?
What is the function of TIU?
-What is the main purpose of a TMA What is the benefit of VAMOS?
What are 2 functionalities of RNC node ? TCU/SIU Function's ?
Transport connection unit, to other RBSs,
to support sync tech,
Ericsson IP RAN reference solution
What are the characterestics of TCU? Choose two A. Queue in Queue (C-VLAN and S-VLAN)
B. IP over TDM C. TDM over IP D. Traffic policing B,C not sure
How is frequency synchronization achieved in TCU? (something like that)
A. Hold over time in TCU is greater than hold over time in DU B. TCU has higher frequency precision
C. Simplifies the synchronization recovery procedure
D. Possiblity to control different synchronization methods
What are 2 elements that limit throughput according to Shannon's Theorem ?
What are 2 reasons that trigger compressed mode ? What information can be obtained from CPICH
What is a softer handover
What is Ericsson definition of a Channel Element Protocol on Iu interface?
What Iur Link Used For?
Three types of Handover in WCDMA ?--SF used in HS-PDSCH
Protocol on Iur
What is the role of Primary Scrambling code in WCDMA?
what is IU Flex ?
What are 2 purposes of power control in WCDMA systems? Choose 2
Queuing is happening in UMTS N/w. User will be effected in which ways? (Choose 2)
Effect of Smartphone in UMTS? 1. Control increased usage
2. Sharing of more cells at same time
Evo RAN – Controllers
WHAT IS THE DIFFRENCE BETWEEN IP RAN AND TDM RAN? WHAT IS THE ADVANTAGES OF BSC 8200 OVER 8100? WHAT IS THE MAIN FEATURE OF RBS 6601,6102
HOW MANY MAX TRX CAN BE CONFIGURED IN BSC 2000?
LTE PEAK THROUGHPUT DEPENDS ON(2)
IF THERE IS AC FLUCTUATION, WHICH BATTERY SHOULD BE USED?
IF YOU WANT TO REPLACE GENERATOR ENABLED BSC WITH (BATTERY BACK UP AND GENERATOR ENABLED BSC) WHAT CONDITION SHOULD BE MET?
one question is from ENIQ… what output u'll get from ENIQ(CHOOSE TWO)
what is radio resource building block?
what is difference between egprs and gprs how to reduce operational cost
how to increase or reduce the coverage area het net question with diff. options
what is mSMM (MULTIPLE STANDARD MIXED MODE) READ MIMO INSTALLATION PROCEDURE
WHICH BASEBAND UNIT FOR RADIO RESOURCE MGMT IN WHICH UNIT SOFTWARE UPGRADE,
HOW MANY MAX TRX CAN BE CONFIGURED IN EVO8200? CDU ( Combiner Unit)
Diesel---> Diesel+Battery Backup---> Where SW installed in RBS 2000 ?
Why Freq. sysnchronisation req. in LTE Which unit is available in RBS 6000
How to control coverage of site remotely Jump Regulator used where
Which Modulation scheme used in DL in LTE RANAP protocol used for which interface Two functionality of TCU 02
Which protocols used on Abis Interface
cell Reselection used in ?
GBR of steaming RAB
If Iu Link has congetion & N/w has capacity then which KPI is affected.
Board in EVO controller 1) TRH
2) EPB 3) DXU 4) APG
SGSN lies in which layer? 1) Application Layer
2) Connectivity Layer 3) Control Layer
Facts about RNC3810?
1) configuration is largest RNC Cabinet configuration 2) Built with full redendency
3) Can't handle time varying traffic mix between CS & PS 4) Change in traffic pattern are handle automatically
Answer
Linearly Polarized Cyclic
8 PSK
GPRS_GMSK And EDGE_ 8psk, Capacity is Double in EGPRS, IP Supported/ BSC that is RNC Prepared
EvoC 8100/Multi will be GA at the same time as EvoC 8200/RNC A node sharing its resources for GSM & WCDMA Traffic
Twice Capacity---> 4095 Trx / 8092 Trx
EPB,CMXB,SCXB,EVOET,AAP,CAX, PFM ( AXE & APZ not supported)
BSC to Core Network Voice Traffic.
Location area update and Cell Reselection.
Capability to achieve upto 32 speech channels per TRX Twice Capacity 20Gbps Iub throughput HW prepared for 50Gbps 6000 RBS/20000 Cells, 8* 10 GE Ports, 8 Ports STM-1
1) Multi Standard Controller 2)Optimized for all IP Network
3) Highest Capacity with smallest footprint
It’s a RAN that the node must supports multiple radio access technologies as per 3GPP
8 time slots/physical channels per frequency
Gb and A interface
1. Packet Abis 2. Edge enabled TRX GSM site Online monitoring tool
reduced interference/ increase capacity
SC-FDMA
By measuring the reference signal Number of installed TRX and
Number of available frequencies
Adaptive multirate,Because the codec rate is adapted according to the radio link quality
The channel mode [AMR FR/AMR HR] is also adapted dynamically And
there are 8 speech rates [Instead of 1 fixed rate in Speech Versions 1&2]
Frequency reuse is a technique of reusing frequencies and channels within a communications system to improve capacity and spectral efficiency And reduce Intercerence.
1) Dedicated in-building systems helps to offload macro network 2) Majority of mobile broadband traffic is located within buildings
1) LTE is packet switched network which means that voice can be carried through VoIP
2) The legacy GSM/WCDMA systems can be used to carry the voice by a fall back procedure.
A user that has RRC connection
S1 & X2
home - visitor
RB & radio condition, modulation,MIMO & BW DUL
0.5ms & 180Khz
~1dB Better in UL and ~1dB better in DL
Separating a chunk of frequency from existing frequencies for LTE Release 8
higher data rates & improves coverage 10ms
Messages between UE and Core Network
Reduced deployment costs and savings on OPEX
1) ANR is to add neighbors based on UE measurements for optimization
2) Initial neighbor plan required
ICI reduction , dopler freq shift correction // Time-GPS,Phase-NTP
3 to 5dB downlink link budget due to SINR improvement hance improve the coverage & throughput
The maximum numbers of carriers for GSM in MSMM in (R)RUS02 and RRUS12 is seven
Openness, adaptibility, expandability, precise, practicability & flexibility
By the introduction of Self Organizing Networks functionality within the OSS portfolio
It’s a network topology of different radio access technologies co-existing together with small cells embedded in larger cell coverage area
It’s a RAN that the node must supports multiple radio access technologies as per 3GPP,of the ‘one network’ vision, in which mobile broadband and premium voice services will be delivered seamlessly over a simplified, efficient RAN that flexibly combines GSM, WCDMA/HSPA and LTE coverage with IP-based transport.
Under the Evo RAN umbrella, we are developing new radio network solutions and approaches that will enable operators to optimize
their use of GSM, WCDMA and LTE resources at all stages of market development – whether as stand-alone networks or as
multi-standard coverage solutions. These include core network reuse,
multi-standard RAN nodes and site solutions, transmission networks and powerful tools that let operators manage more with less effort. Lower cost of operation
manage more with less effort reduce cost of energy
reduce cost of transmission
Secure Quality of Service provided to operators enduser Easy support of fair usage polices
Performance monitoring of multi vendor and multi technology Service management monitoring
Simplify network architecture Common IP transport
Logical separate networks but one physical infrastructure
EVO RAN together with RBS 6000 enable power saving functionality, for instance Time slot power savings, PSU power savings and
Dynamic RU shut down where we foresee possible power savings 20-30% on radio network level.
Accesibility
Aknowledge mode
UL Sensitivity
Retainability/Accesibility Integrity
one common RAN transport, Optimize the networks for new subscriber growth
Increase Mobile Backhaul capacity
Reduce cost per bit of transporting data traffic Lower OPEX & CAPEX with Ethernet
A single unit combing antenna with the active radio part to simplify installation process in difficult site locations.
B. UL Sensitivity - Think UL sensitivity, due to soft HO gain, not sure D. Radio wave propagation
MAC 64 QAM
Accessibility,Availablily& Mobility --- Delay,packet loss, PTP, NTP , GPS
beam forming, spatial diversity, / Improve coverage,redundency OPEX
Initial Tuning
process of selection of a suitable candidate during new site roll out Ans-Servey(Site servey ) one cordinate
Modulation/MIMO Physical Layer RNSAP
radio network management (such as radio frequency control),BTS handover management and call setup, allowing the MSC to handle critical tasks, such as traffic balancing and database management.
Handling Radio Resource management & RBS control, Mobility management
Businees meeting-Planning-Integration-Initial Tuning-Launch-Optimization
HW Activation Codes for CE UL and CE DL / Hardware Activation Codes for TRX
Integrity
Retainability Ossiclator
UE sync / Time-GPS,Phase-NTP BER
Coverage, Cell Radius Traffic Quality
Variation in coverage of a cell due to changes in number of users Support Modulation & Max Transport Format
CRC
One common pipe for GSM, WCDMA,& LTE Random Access
Okumura- Hata & Cost231
Speech, Data & Signalling
PDN GW to PCRF (Policy Control and Charging Rules Function) / on-line policy interface between the GGSN and the charging rules function (CRF)
Radio Resource Management (RRM) is responsible for optimal
utilisation of the air interface resources.Target for RRM is to ensure the RAN offers:
• The planned coverage for each targeted service
• High capacity i.e. low blocking (new calls, handovers) • The required Quality of Service (QoS)
• Optimize the use of available capacity (priorities)
Reported by UE to the node B &
Delay, Delay Variation & Packet Loss Accessbility Accessbility B. Energy management D. Site security a. dBm is relative to 1mW b. dB is unitless
c. dBi is directional gain of antenna
RLC and MAC ( might be MAC is the right Answer )
MSR is a hardware unit capable of sharing its transmitter between different radio access technologies and
MSR is a common 3GPP specification for GSM, WCDMA & LTE 1) The power consumption of the RBS at maximum radio power output
Minimize disturbance on air interface to secure handover between RBSs,Both FDD and TDD based Radio Technologies require
DUX - CPU RNC 3820 TCU DU -48 V DC / if AC then 115 / 230 v Ac DUW
An increase in the physical Channel Elements (CE)
Optical Radio Unit Interface Board SPB
Same capacity with less footprint 4
LTE, CDMA ,Wimax & Wifi
TCU / DU (Digital Unit)
STM1 x DUW / TIU traffic routing and synchronization configuration
RBS 6102 with integrated pwr & battery backup, RBS 6101 with pwr with Battery base unit(BBU)
Very small Indoor Main unit which can inserted in existing Macro RBS itself,AIR can be installed.
Interface connecting to the Baseband & RF Unit ( interface between Main & Rru Unit)
Ericsson IP RAN reference solution // IP Packets///////Transport connection unit, to other RBSs, to support sync tech
Transfer data of different RAN over IP Ericsson IP RAN reference solution
Smart Edge and TCU
To improve the uplink coverage in a location It doubles GSM Capacity
Signal to Noise Ratio (SNR) and Bandwidth IP over TDM
Traffic policing
Hold over time in TCU is greater than hold over time in DU
or
Possiblity to control different synchronization methodsThe Transport Interface Unit (TIU) is an optional unit to extend the number of E1/T1 port up to 16. The TIU provides E1/T1
cross-connection to the STM-1 interface on the DUW
RBS control, Mobility management & Handling Radio Resource management
Weak 3G coverage (IRAT) and Pilot pollution Scrambling code
Managing power capacity and Reducing interference The UE connected to 2 cells in the same RBS
RANAP
SHO B/w RNCs Soft/Softer/IRAT HS-PDSCH SF 16 RNSAP
To identify cells in DL and Users in UL Throughput and buffering
Control increased usage ( high Signaling load)
multiple MSC's to SGSN's
CE is a measure of board capacity and radio bearer (RB) capacity cost
?
Twice the capacity
CELL LEVEL,MONITOR COUNTER DATA GSM HD BSC
BSC Highest Capacity per Volume on the Market , Scalable and Expandable
Up to 2048 TRXs and up to 12000 Erlang (up to 4095 in BSS 08B)
WCDMA RNC 3820
RNC3820 can be built out to 20 Gbps and by introducing RNC3820 units in RNC3810 the capacity of RNC3810 is increased,We have best in class service performance, and are providing increased capacity density with each release while still being backwards compatible.Both BSC and RNC support IP interfaces
Evo Controller 8000
Combined GSM and WCMDA controller
6601---> can support AIR, 6102----> Indoor RBS with integrated pwr backup
1024--2048--4096--6144
CAR BATTERY,ADM BATTERY,CYCLIC BATTERY,LOW DISHCRAGING BATTERY
CYCLIC BATTERY, BATTERY SHOULD BE KEPT AT HIGH TEMPERATURE, GENERATOR SHOULD BE
OF LARGE SCLAE, SOME RECTIFIER USED****
?
modulation scheme ran power,
beam forming, electrical tilt ?
Radio N/W freq. sync via backhaul N/W ( multi standard Multi mode) ?
Digital Unit (DL) CPU,CDU,…. 8192
Diesel For long time, Battery should be capable for high Temp. DXU
? DUL
RET (Elect. Tilt)
UL Outer loop Power control OFDMA
Iu interface
2 Trx connected to 2 Antenna, / Simutaneously Tx & Rx on each Antenna
Option - 1) TDM Mux 2) TDM Routing
3) IP Switching
DXU provides Freq. reference Signal & timining Signal for Circuit within RBS
112 Kbps EPB Connectivity layer 1) LAPD Multilexing 2) LAPD………….. 3) LAPD………….
Select all LAPD started option 1) GSM
2) WCDMA 3) LTE
4) General
1) Throughtput
2) PS call should be terminated 3) Problem on CS Call
What information can be obtained from CPICH
A
Scrambling code
B & D
A & C
A & D
As per Me its ---> LTE , WiFi & CDMA
A & C
A & D
As per Me its ---> LTE , WiFi & CDMA
true
false
