03 - WCDMA RAN Call Flow and KPI Definitions_08.09(1)
Short Description
WCDMA RAN Call Flow and KPI Definitions...
Description
Overview – Radio Access Networks Associate Certification Areas › RAN Fundamentals › RAN Evolution › RBS and Site Solution › RAN Transport › RAN Controllers › OSS › GSM RAN › WCDMA RAN › LTE RAN RAN Fundamentals › General RAN architecture › Radio design principles › Air interface principles › Signaling, protocols and layers › Radio network functionalities › RAN performance RAN Evolution
§ Industry technology evolution and trends § Technologies together contributing to mobile oper § Value add of one common RAN / EVO RAN RBS and Site Solution
§ RBS product types and characteristics, basic techn § Site solution principles, products, solution concept § Main advantages/values, impacts on RAN perform RAN Transport § Basic technology and characteristics § Architecture and Interfaces, § Synchronization solutions § Main advantages/values with IP RAN Solution and RAN Controllers § BSC and RNC, products and features, architecture § Main advantages/values OSS Fundamentals
§ The role of OSS in Ericsson business support syste § Main advantages/values, impacts on RAN perform 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
usiness evolution
and architecture of RBS building modules and their function. tion and characteristics nd OPEX reduction
s on RAN performance
ding blocks and their function
ctionalities and features nd OPEX reduction.
Main Topic RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN RAN
Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution Evolution
LTE Technology
Session LTE Fundamentals (NSL744752) csson 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
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 o OSS-RC functionality for LTE (Centra) – LTE Academy o Total Network Performance – ENIQ (WBL) – OSS Academy/Assurance http://streaming.internal.ericsson.com/user/global_player/player.htm?program=11050994 o The Importance of OSS in Self Organizing Networks - OSSAcademy/PBO o SON Overview (WBL) – LTE Academy http://learningcontent.internal.ericsson.com/courses/content/LTE-EPC/LTE/LTE031%20-%20LTE%20SON%20Overview/centra/start.exe o SON detailed functionality (WBL) – LTE Academy http://learningcontent.internal.ericsson.com/courses/content/LTE-EPC/LTE/LTE006%20SON%20Detailed%20Functionality%20in%20L10/player.html o PPM of 2012 (video & WBL´s)
Playback Link 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 Playback Link https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718cba https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718cbf https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8f9f
Description
https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8fa8 https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718f5a https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8fb4 https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8fc1 https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718f94 https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8f96 https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718fd7
timization https://host3.sabameeting.com:443/GP/main/000000867fc90000012f9236ba7c8f7c https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718fae
https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718f9b https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718fce
Processing https://host3.sabameeting.com:443/GP/main/0000002c17f70000012f923bcb718ffb
https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66ca51 https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66ca4c https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66ca40 https://host3.sabameeting.com:443/GP/main/000000457d210000012dace0ae66cdfc https://host3.sabameeting.com/GP/main/000001fa681c0000012e5e653e50e2bc https://host3.sabameeting.com:443/GP/main/0000006963d0000001311f469d03bf4e https://host3.sabameeting.com:443/GP/main/000000e5355f00000132ab097a5684ef https://host3.sabameeting.com:443/GP/main/0000004310d0000001311f4664329cd5 https://ericoll.internal.ericsson.com/sites/GKO/Lists/GKO/DispForm.aspx?ID=95915&Source=https%3A%2F%2Fericoll%2Einte https://host3.sabameeting.com:443/GP/main/0000004eb04300000132097868d285f9 https://host3.sabameeting.com/SiteRoots/main/Install/sabameetingApplet.jsp?sessionid=1315857969397278021&redirect=http https://host3.sabameeting.com:443/GA/main/000000e5355f00000132ab097a5684ef
Links
https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/sites/Ericsson_Academy_GSM_RAN/default.aspx?Paged=TRUE&p_Production_x005F_x0020_date=20120 https://ericoll.internal.ericsson.com/SITES/PA_RADIO_ACADEMY_SPACE/default.aspx https://ericoll.internal.ericsson.com/sites/ERICSSON_ACADEMY_ERICSSON_IP_RAN/Pages/TechnicalSales.aspx https://www.myericssonlearning.com/sumtotal/app/management/LMS_ActDetails.aspx?UserMode=0&ActivityId=118910 https://www.myericssonlearning.com/sumtotal/app/management/LMS_ActDetails.aspx?UserMode=0&ActivityId=152130&ClassUnderStruct= http://learningcontent.internal.ericsson.com/courses/content/PA%20Radio/Business%20Presentations/07.%20RAN%20Evolution%20-%20Evo http://learningcontent.internal.ericsson.com/courses/content/PA%20Radio/Business%20Presentations/RAN%20Transformation%20and%20Mo http://learningcontent.internal.ericsson.com/courses/content/PA%20Radio/Business%20Presentations/RAN%20modernization/player.html http://learningcontent.internal.ericsson.com/courses/content/PA%20Radio/Business%20Presentations/Mobile%20broadband%20commercial% http://streaming.internal.ericsson.com/user/global_player/player.htm?program=11050446 http://learningcontent.internal.ericsson.com/courses/content/PARA/WCDMA/WCDMA111028_Mobile_Broadband_Enhanced_Uplink_Evolution/
http://learningcontent.internal.ericsson.com/courses/content/LTE-EPC/LTE/LTE019%20-%20TEMS%20Cellplanner%20for%20LTE%20Overview
coll%2Einternal%2Eericsson%2Ecom%2Fsites%2FGKO%2FLists%2FGKO%2FAllItems%2Easpx&RootFolder=%2Fsites%2FGKO%2FList
edirect=https%3A%2F%2Fhost3.sabameeting.com%3A443%2FSiteRoots%2Fmain%2FUser%2FPlayback.jhtml%3Fr_id%3D0000004eb04
ion_x005F_x0020_date=20120120%2023%3a00%3a00&p_Title=Reduced%20OPEX%20for%20APG&p_ID=122&View={52E8C875-F43B-46BF-B268-F486
Id=152130&ClassUnderStruct=False&CallerUrl=%2fsumtotal%2fapp%2ftaxonomy%2flearnerSearch%2fLearnerSearch.aspx%3fUserMode%3d0 0RAN%20Evolution%20-%20Evo%20RAN/player.html 0Transformation%20and%20Modernization/player.html 0modernization/player.html %20broadband%20commercial%20strategy/player.html
nd_Enhanced_Uplink_Evolution/player.html
ner%20for%20LTE%20Overview/player.html
=%2Fsites%2FGKO%2FLists%2FGKO
ml%3Fr_id%3D0000004eb04300000132097868d2c21d%26sessionid%3D1315857969397278021%26r_id%3D0000004eb0430000013209
View={52E8C875-F43B-46BF-B268-F486A58FA161}&PageFirstRow=11
Search.aspx%3fUserMode%3d0
6r_id%3D0000004eb04300000132097868d2c21d&PluginEnabled=false&returnPageUrl=https%3A%2F%2Fhost3.sabameeting.com%3A44
F%2Fhost3.sabameeting.com%3A443%2FSiteRoots%2Fmain%2FUser%2FPlaybackOptions.jhtml%3Fr_id%3D0000004eb043000001320
3Fr_id%3D0000004eb04300000132097868d2c21d%26s_id%3D0000004eb04300000132097868d2ba92%26cdurl%3Dnull%26sessionid%
a92%26cdurl%3Dnull%26sessionid%3D1315857969397278021
Question Describe the Site Design Procedure in Order. 1. What type of traffic is managed by logical A interface? 10. How can an existing GSM/WCDMA operator offer voice services when LTE is introduced?(Choose 2) 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. 103.which unit is connected to handle, sw,rr management in rbs 2000? 104.RBS3820 is better than RBS 3810 why? 105.ue is connected in cs network, but cannot make call.Effected KPI? 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? 16. What are 2 aspects of Automatic Neighbor Relation (ANR) as per Ericsson implementation? (Choose 2)17. What is a softer handover? 18. Each timeslot on TDMA frame is a physical channel. How many physical GSM factors carrier frequency? 19. Whatchannels are the 2per limiting on capacity- of a GSM cell? (Choose 2) 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 multi-RAN 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? 27. What technologies are supported by RBS 6000 series?(Choose 3) - What parameter is to be considered while dimensioning battery 28. backup capacity an RBS? - of an In-building solutions? 29. What are the for 2 main drivers (Choose 2) 3 Characterstics of Radio KPI 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 node?-33. Characteristics of Abis for VAMOS and Edge Evolution?(Choose 2)-34. Electrical Tilt increased which 2 KPI will be affected ?-35. After Optimisation Uplink throughput increases which KPI 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? 41. Difference between Link budget of BSC? WCDMA 4. What are 2 functionalities of RNC & - and LTE? A. Antenna Gain 40. Protocaol on Iu interface? B. UL Sensitivity C. Penetration Loss 42. whichwave modepropagation shows reliable dataUL transfer to the target?-D. Radio - Think sensitivity, due to soft HO 43. Difference Between HD BSC and EVO 8100? gain, not sure 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? 48. Which Layer is responsible for Modulation and Radio Measurements? 49. Identify two Propagation models among the the options given? 5. What are 2 elements that limit throughput according to Shannon's Theorem? 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?
56. What is the importance of time and phase synchronization in LTE? 57. Why is frequency synchronization important in RBS? 58. What is the function of TIU? 59. What is the difference in traffic carried by Evoc8100/BSC & Evoc8200/BSC? -
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? 62. What is the process of selection of a suitable candidate during new site roll out? (same question in some diff words) 63. What is the Spreading Factor of HS-PDSCH? 64. EVO controller supports which of the following? 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 66. What are the characterestics of TCU? Choose two D. Site security A. Queue Not sure in Queue (C-VLAN and S-VLAN) B. IP over TDM C. TDM over IP 67. How ispolicing frequency synchronization achieved in TCU? (something D. Traffic like that)sure B,C not 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 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? 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) 73. Reasons for calculating Link Budget.? 74. What Are the main Difference betwn Quality of service classes
75.Which Factors Defines Cell peak LTE Thruput. 76.which board in EnodeB is for processing radio Resource management function in LTE? 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? ~ 81.Benifit of EVOC8200 BSC when compared to EVOC8100/HD BSC? 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 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 Unit cellsin atRBS6000 same time 97. IuB Connection 3. Usage of resources (Have 1 more option, Need to select one) 1.DUL 2.DUG 98. UE is in Idle state but not able to make call.. Effected KPI? 3.DUW A.Accessbility B. Retainability C. Availability D. Intergrity 99. Layer2 Control Plane protocols 4.TIU a. RRC b.RLC c.PDCP d.MAC 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
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 is the advantage of allowing the TCU-02/SIU 02 to distribute the frequency synchronisation to the DUs ??
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.
Answer
Businees meeting-Planning-Integration-Initial Tuning-LaunchOptimization BSC to Core Network Voice Traffic. LTE is packet switched implying voice can be carried through VoIP and legacy GSM/WCDMA systems to carry Cross polarization
It’s a RAN that the node must supports multiple radio access technologies as per 3GPP 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 ANR is to add neighbors based on UE measurements for optimization, initial neighbor plan required 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 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 Reduced deployment costs and savings on OPEX It’s a network topology of different radio access technologies co-existing together with small cells embedded in larger cell coverage area -It’s network where small cells used technologies to offload macro cells a RAN topology that supports multiple radioare access 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 LTE, CDMA & Wifi The power consumption of the RBS at maximum radio power output Dedicated in-building systems offload macro network and majority of mobile broadband traffic is located within buildings Delay,packet loss, Messages between UE and Core Network
To improve the uplink coverage S1 & X2
GB and A interface
1. Packet Abis (Abis Optimization or Abis over IP) 2. Edge enabled TRX Accesibility & Retainability Integrity Soft/Softer/IRAT DU Alaram handling A node sharing its resources for GSM & WCDMA Traffic Handling Radio Resource management & RBS control, Mobility management RANAP UL Sensitivity & Radio wave propagation Connection oriented / 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 Reported by UE to the node B & Used by scheduler for Radio Resource scheduling Speech, Data & Signalling The use of limited number of frequencies within a given area
Initial Tuning
TCU
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 Buisness Plan> Design > installation > integration > initial tunning >Launch> optimization Weak 3G coverage (IRAT) and Pilot pollution DU
a. dBm is relative to 1mW b. dB is unitless c. dBi is directional gain of antenna Delay, Delay Variation & Packet Loss Coverage, Cell Radius
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 RBS 6102 with integrated pwr & battery backup, RBS 6101 with pwr with Battery base unit(BBU) 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 Openness, adaptibility, expandability, precise, practicability & flexibility Handling Radio Resource management & RBS control, Mobility management 6000 RBS/20000 Cells, 8* 10 GE Ports, 8 Ports STM-1 SoIP- (Main experience today is from NTP), PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode) 4 Options are - Improve coverage,redundency, / beam forming, spatial diversity, Tx & Rx div RNSAP SoIP, PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi Multi Mode) HS-PDSCH SF 16,standard The Downlink HS-SCCH is a fixed rate (60 kbps, SF=128) , HS-DSCH SF 16 BER Transfer data of different RAN over IP
Option-TDM / Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution -48 V DC Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution SPB GSM site Online monitoring tool on-line policy interface between the GGSN and the charging rules function (CRF) 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
Jatin's Answer Businees meeting-Planning-Integration-Initial Tuning-LaunchOptimization BSC topacket Core Network Traffic. LTE is switchedVoice implying voice can be carried through VoIP and legacy GSM/WCDMA systems to carry To avoid sync loss and delay spreading UE sync Cross polarization
Accessbility Improved throughput Shrinking of n/w on basis of loading It’s a RAN that the node must supports multiple radio access technologies as per 3GPP 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 capacitybased and Reducing interference for ANR is to add neighbors on UE measurements optimization, initial neighbor plan required
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 andcapacity Cell Reselection. CE is a measure of board 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 It’s a network topology of different radio access technologies specification for GSM, WCDMA & LTE co-existing together with small cells embedded in larger cell coverage area Reduced costssmall and savings OPEX - networkdeployment topology where cells areon used to offload macro cells It’s a RAN that supports multiple radio access technologies as per 3GPPunit combing antenna with the active radio part to A single simplify installation process in difficult site locations. By the introduction of Self Organizing Networks functionality within the OSS portfolio LTE, CDMA & Wifi The power consumption of the RBS at maximum radio power output 1) Dedicated IBS to offload macro N/w 2) Majority of mobile traffic is located withing buildings Delay,packet loss, Messages between UE and Core Network
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 resources for GSM & & WCDMA Traffic Mobility Handling Radio its Resource management RBS control, management 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 Reported by UE Ratio to the(SNR) node and B & Bandwidth Used by scheduler for Radio Resource scheduling Speech, Data & Signalling AMR encodes narrow band to varialble The use of limited number of frequencies within a given area
Initial Tuning
TCU
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
B. Energy management D. Site security
C. TDM over IP D. Traffic policing
A. Hold over time in TCU is greater than hold over time in DU
higher data rates & improves coverage Buisness Plan> Design > installation > integration > initial tunning >Launch> optimization Weak 3G coverage (IRAT) and Pilot pollution DU
a. dBm is relative to 1mW b. dB is unitless c. dBi is directional gain of antenna Delay, Delay Variation & Packet Loss Coverage, Cell Radius
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 RBS 6102 with integrated pwr & battery backup, RBS 6101 with pwr with Battery base unit(BBU) 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 Openness, adaptibility, expandability, precise, practicability & flexibility Handling Radio Resource management & RBS control, Mobility management
6000 RBS/20000 Cells, 8* 10 GE Ports, 8 Ports STM-1 SoIP- (Main experience today is from NTP), PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi standard Multi Mode) 4 Options are - Improve coverage,redundency, / beam forming, spatial diversity, Tx & Rx div RNSAP SoIP, PTP, Synchonous Ethernet, radio nw freq sync via backhaul n/w-MSMM(Multi Multi Mode) HS-PDSCH SF 16,standard The Downlink HS-SCCH is a fixed rate (60 kbps, SF=128) , HS-DSCH SF 16 BER Transfer data of different RAN over IP
Option-TDM / Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution -48 V DC Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution SPB GSM site Online monitoring on-line policy interface betweentool the GGSN and the charging rules function (CRF) Hardware Activation Codes for TRX for SHO bet RNCs Modulation/MIMO duplex filters / RF & Microwave band pass filters Integrity MAC 64 QAM
SUB ANTENN A BATTERY EGPRS EGPRS EVO EVO EVO
EVO
EVO EVO EVO EVO GSM GSM GSM
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
RAN
EVO
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
RNC
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
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, 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
Each timeslot on TDMA frame is a physical channel.How many physical channels per GSM carrier frequency? What are the 2 limiting factors on capacity of a GSM cell which two interface are connected to BSC node? Characteristics of Abis for VAMOS and Edge Evolution?(Choose 2)--Edge timeslot/flexi FR and HR/flexi Abis/Packet Abis--- Need to Confirm what is GSM OMT tool does What are the advantages of AMR?
What is AMR
What is frequency Reuse? What are the 2 main drivers of an In-building solutions? Choose 2 What air interface access technology is used in uplink LTE? How does the UE estimate the radio quality of an LTE cell ? 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 What are 2 aspects of Automatic Neighbor Relation (ANR) as per Ericsson implementation ?choose 2 Which are the 2 logical transport interfaces for an LTE system What is the importance of time and phase synchronization in LTE? Diff between H-PCRF & L-PCRF Which Factors Defines Cell peak LTE Thruput. which board in EnodeB is for processing radio Resource management function in LTE? 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 is a HetNet?(Choose 2) -
What is an Evo RAN
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?-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
Difference between Link budget of WCDMA and LTE? Which Device is Used to combine Different 3GPP Frequency Bands? Electrical Tilt increased which 2 KPI will be affected ?-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 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) Advantages of IP RAN BSC Functionalities BSC & RNC Functionalities Describe the Site Design Procedure in Order ? Or What is the order of Network Roll out? Which is the stage after integration and before launch? What are site Survey's Done for What is the process of selection of a suitable candidate during new site roll out? (same question in some diff words) - Site Survey Which 2 Techniques make most of the Spectrum Utilisation Which Layer is responsible for Modulation and Radio Measurements? which protocol between two RNC What is HWAC
what is GX interface which KPI affects UL throughput Which KPI can be improved by optimizing Neighbour Relations? Retainability 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 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 is a Multi Standard Radio?(Choose 2) What parameter is to be considered while dimensioning battery backup capacity for an RBS Why frequency synchronisation is used in RBS?
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. Baseband Unit in RBS 6000?-- DU/DXU/RU/? Voltage of RU in RBS 6000 ? 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 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 what does TCU brings to RBS ? Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution
TCU Supports which Functionalities TCU/SIU Function's ? Transport connection unit, to other RBSs, to support sync tech, Ericsson IP RAN reference solution What are the product included in IPRAN 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 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 ? 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 are 2 purposes of power control in WCDMA systems? Choose 2 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? 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 3. Usage of resources (Have 1 more option, Need to select one) what is IU Flex ?
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? 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) LTE PEAK THROUGHPUT DEPENDS ON(2)
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 DXU Funtion
Which protocols used on Abis Interface
cell Reselection used in ?
If Iu Link has congetion & N/w has capacity then which KPI is affected. GBR of steaming RAB 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 4) ……………….
Facts about RNC3810? 1) 2) 3) 4)
configuration is largest RNC Cabinet configuration Built with full redendency Can't handle time varying traffic mix between CS & PS 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 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 Twice Capacity------> 4095 Trx / 8092 Trx
EPB,CMXB,SCXB,EVOET,AAP,CAX, PFM ( AXE & APZ not supported It’s a RAN that the node must supports multiple radio access technologies as per 3GPP BSC to Core Network Voice Traffic. Location area update and Cell Reselection. Capability to achieve upto 32 speech channels per TRX
8 time slots/physical channels per frequency Number of installed TRX and Number of available frequencies Gb and A interface 1. Packet Abis 2. Edge enabled TRX
GSM site Online monitoring tool reduced interference/ increase capacity 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 Version 1&2] Frequency reuse is a technique of reusing frequencies and channe 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 SC-FDMA By measuring the reference signal
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 voic by a fall back procedure.
A user that has RRC connection 1) ANR is to add neighbors based on UE measurements for optimization 2) Initial neighbor plan required S1 & X2 ICI reduction , dopler freq shift correction //
Time-GPS,Phase-NTP
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 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 withi the OSS portfolio Messages between UE and Core Network Reduced deployment costs and savings on OPEX
It’s a network topology of different radio access technologies coexisting together with small cells embedded in larger cell coverag area - network topology where small cells are used to offload macro ce
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 networ solutions and approaches that will enable operators to optimize their use of GSM, WCDMA and LTE resources at all stages of marke development – whether as stand-alone networks or as multistandard coverage solutions. These include core network reuse, multi-standard RAN nodes and site solutions, transmission networ and powerful tools that let operators manage more with less effor 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 functionali 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.
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 simplif installation process in difficult site locations. Accesibility Aknowledge mode
B. UL Sensitivity - Think UL sensitivity, due to soft HO gain, not sur D. Radio wave propagation
UL Sensitivity Diplexer
Retainability/Accesibility Integrity
MAC 64 QAM Accessibility,Availablily& Mobility ------- Delay,packet loss, PTP, NTP , GPS
beam forming, spatial diversity, / Improve coverage,redundency
OPEX radio network management (such as radio frequency control),BTS handove 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-LaunchOptimization Initial Tuning
process of selection of a suitable candidate during new site roll ou Ans-Servey(Site servey ) one cordinate Modulation/MIMO Physical Layer
RNSAP HW Activation Codes for CE UL and CE DL / Hardware Activatio Codes for TRX
PDN GW to PCRF (Policy Control and Charging Rules Function) / on-line policy interface between the GGSN and the charging rules function (CRF) 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 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) CRC One common pipe for GSM, WCDMA,& LTE Random Access Okumura- Hata & Cost231 Reported by UE to the node B & Used by scheduler for Radio Resource scheduling Speech, Data & Signalling
B. Energy management D. Site security
a. dBm is relative to 1mW b. dB is unitless c. dBi is directional gain of antenna Delay, Delay Variation & Packet Loss Accessbility RLC and
MAC ( might be MAC is the right Answer )
Accessbility
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 frequency synchronization.
DUX - CPU RNC 3820 TCU LTE, CDMA ,Wimax & Wifi
DU -48 V DC / if AC then 115 / 230 v Ac TCU / DU (Digital Unit)
STM1 x DUW / TIU traffic routing and synchronization configuration DUW
RBS 6102 with integrated pwr & battery backup, RBS 6101 with pw with Battery base unit(BBU) Very small Indoor Main unit which can inserted in existing Macro RBS itself,AIR can be installed. An increase in the physical Channel Elements (CE)
Interface connecting to the Baseband & RF Unit ( interface between Main & Rru Unit) Optical Radio Unit Interface Board SPB Same capacity with less footprint 4 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
IP over TDM Traffic policing
Hold over time in TCU is greater than hold over time in DU synchronization methods
or
Possiblity to control different
The Transport Interface Unit (TIU) is an optional unit to extend the number of E1/T1 port up to 16. The TIU provides E1/T1 crossconnection to the STM-1 interface on the DUW To improve the uplink coverage in a location It doubles GSM Capacity RBS control, Mobility management & Handling Radio Resource management Signal to Noise Ratio (SNR) and Bandwidth
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 CE is a measure of board capacity and radio bearer (RB) capacity cost 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
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 ? Twice the capacity
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 OF LARGE SCLAE, SOME RECTIFIER USED****
CELL LEVEL,MONITOR COUNTER DATA TDD,FDD ,FREQUENCY,BANDWIDTH,Modulation
? modulation scheme ran power, beam forming, electrical tilt ?
Radio N/W freq. sync via backhaul N/W ( multi standard Multi mod ? Digital Unit (DL) CPU,CDU,…. 8192 2 Trx connected to 2 Antenna, / Simutaneously Tx & Rx on each Antenna Diesel For long time, Battery should be capable for high Temp. DXU ? DUL RET (Elect. Tilt) UL Outer loop Power control OFDMA Iu interface Option - 1) TDM Mux 2) TDM Routing 3) IP Switching DXU provides Freq. reference Signal & timining Signal for Circuit within RBS
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 4)…………… 112 Kbps
EPB
Connectivity layer
?
A
What information can be obtained from CPICH Scrambling code
Scrambling code
B& D
A
B
A& C
A & D
B
As per Me its -----> LTE , WiFi & CDMA
A& C
A & D
A Not sure
&
D
ts -----> LTE , MA
true
true
false
How does IP save money?
With IP we build one network to serve the transport needs f standards of radio. (Correct) With IP we only save money with LTE With IP we replace all legacy network equipment with chea based equipment
How does IP enable mobile broadband? IP provides scale and high speed performance (Correct) IP reaches new types of terminals IP separates different types of network traffic
”You need Ethernet to enable IP”
True, without Ethernet access to the cell site, IP provides no False, IP can be deployed even before Ethernet access is av (Correct)
dw
dw
ort needs for all with cheapr IP
orrect)
provides no benefit ccess is available
1. select the correct statement for the unit of power (dBi) Antenna gain is expressed in dBi dBi is a dimensionless unit dBm = 1mW 2) What is scrambling code and its use? Scrambling code : Cells/UE(DL/UE). Channelization code: user/services 3) Radio wave propagation is based on which theorem/principle? Maxewell 4) TIU is used for? The Transport Interface unit is a plug in unit which expends the number of E1/T1 to 16. The TIU provided the E1/T1 cross section to the STM-1 interface. 5) Function of BSC & RNC: Mobility and radio resource management 6) Modulation technique used in in LTE? DL: OFDMA: Less ISI UL:SC-FDMA Low PAPR 7) which KPI is effected if MS is in idle mode and latched to a network but you are not able to make calls Accessibility 8) Spreading factor in HS-DSCH 16 9) Relation b/w capacity of 8100 and 8200 EVO Controller. 8200 supports twice as many TRX as 8100. 10) VAMOS needs which feature on Abis? Packet Abis Edge enabled TRXs PGW (ABIS OPT/ABISIP, PGW) 11) VAMOS supports calls(TS/Frame) Apr-32 12 2X2 MIMO requires: Dual antenna and software functionality 13RANAP is used on Iuinterface 14 Baseband is a function of ____ in RBS6000 (DU) 15 Which link are used in LTE a. S1 c. X2 16 What is the order of network roll out: a. Buisness Plan> Design >insatallation> integration > initial tunning> optimization.
17. If a negbiour optimization is done which KPI will improve: a. Availability b. Retainability c. Integrity d. Accesability .
18) softer hw(bw 2 sectors of same RBS) 19) Spreading factor of HS-PDCH (16) Spreading factor of CPICH (256) Spreading factor of HARQ (256 20)if throughput improves, which KPI is impacted (integrity) 21 3 sectors, excessive downtilt, which KPI is impacted (accessibility) 22 DL power control advantages (coverage inc) 23. UL power ctrl advantages (co channel interference) 24) EGPRS (upto 384kbps), GPRS (upto 59kbps) 25) most sensitive modulation (64QAM). 26) RRU benefits (power less, main remote config). 27) Shanon's theorem (capacity depends on BW and SNR). 28) Higher order modulation benefit (inc. data rate) 29) 2G n 3G active in NW, LTE introduced how will call flow in LTE? (VOIP, on LTE channels). 30) how to increase spectrum efficiency in LTE? (HOM & MIMO) 31) 2 diff. incoming freq, how to combine them (Hybrid combiner) 32) NAS is b/w (Ue and core) 33) TTI in LTE (1ms) 34) Modulation in EDGE (8PSK) 35) which HW is present in eNB? (DUL) 36) RBS 2000 software loaded in (DXU) 37) Cell breathing (too many users enter a cell, NodeB needs to distribute power to all, cell shrinks its boundary as power is constraint) 38)User plane board in RNC 3820 (SPB) ctrl plane board in 3820 (GPB) 39)i/p power required for RBS 6000? (-48V) 40) LTE=3GPP Rel8 ,LTE Advance=3GPP Rel 10 41) TCU02 along with DU provides >> NTP and IP over TDM 42) Physical channel on GSM on 1 frame = 8TS 43) Link budget : cell coverage, capacity 44) Idle mode in GSM: Location update, Cell reselection
45)In LTE, Ue connected mode (Idle mode, PDP connected, Session connected, -110 db) ans: PDP conn
46) Dual Band TX frequncy combiner: Diplexer 47) BSC Interfaces: Gb, A 48)Difference between TDD and FDD:The downside is that successful implementation of TDD needs a synchronization system at both the transmitter and receiver to make sure time slots don’t overlap or o another. 49)What Iur Link Used For. To have communication between RNC. 50)How Syncronisation is Achieved over IP ML-PPP(IP), 1588.v2, GPS(TDM) 51) Describe the Site Design Procedure in Order. What are site Survey's Done for.
site survey, site comissioning and site integration 52) What is CE? Measure of board Capacity and RB Capacity Cost. 53) Noise Figure 2 both in GSM and WCMDA. 54)ANR : based on Ue measurement, handover definition. 55) SON : OPEX saving 56) Functionality in OSS that saves cost for LTE: Auto Integration 57) Platform of OSS: TMOS,ETOM,TAM 58) How does OSS-RC reduce cost of network rollout: a. RBS Provisioning correct. b. RAN Load c. Capacity and Coverage optimization 59) RBS600 supports: GSM, WCDMA, LTE and WIFI 60) TCU-02/SIU-02 Transport sharing for RBS 6000
The TCU 02 (Transport Connectivity Unit) is a component in the RBS 6000 product family and has been designed primarily to support Multi Standard R
The TCU 02 has the same form-factor as a digital unit and shall be placed in the radio shelf of the RBS. It is available in product packages for all RBS 8
Gigabit Ethernet ports for aggregation of traffic from multiple digital units
8
E1/T1 ports for connecting GSM RBS cards (DUG)
IP
over the TDM (E1/T1) backhaul (as a solution during migration)
Advanced Can
Supports Has
shaping functionality for up to eight queues, with large buffer depth, supporting highest LTE capacity.
act as an IP router and/or as an Ethernet bridge suiting all backhaul deployment scenarios. NTP, 1588v2 and synchronous Ethernet for RAN synchronization.
a local oscillator with 12 months holdover time supporting synchronization over virtually any backhaul technology, including satellite.
Supports
native IP transmission (Abis IP) for Ericsson GSM RBSs making a true All IP multi standard RBS.
Provides
Ethernet LAN/WAN connectivity for local site equipment
Transport sharing for RBS 2000/3000
The SIU 02 (Site Integration Unit) is the 19 inch sibling to the TCU 02. It is designed to fit into the transmission space of the RBS 2000 or 3000, or alte 61)The
NSB Silver (NSB FT series) battery is for customers in a stable power grid with few outages over a longer pe lifetime therefore minimizing site visits, replacement and costs. The Premium battery (OPzV) is a more expensive battery designed to withstand frequent outages and in applica have a long float life. The High Capacity battery (EON) is developed for a fast recharge therefore recovering very fast. This is necessa survive. A standard battery takes about 24 hours to recharge while High Capacity is capable to recharge within 8 hou unstable grids due to its high charge acceptance, float life and high capacity. It is also applicable in long float life con environments. The High Cyclic battery (NSB Blue) is developed for a fast recharge and therefore works excellent where mains i markets with many outages a day or unpredictable power sources like wind, sun etc this is the battery to use. The B lead acid battery run on Partial State of Charge [PSOC]. This means that the battery will not suffer from deterioration time is unavailable. This also makes the battery unparalleled for Hybrid operation. When it comes to batteries in high-cyclic operation, the battery capacity is not as crucial as for stand by operation. B shall be dimensioned by optimizing the charge/discharge window. The best high-cyclic performance will be reached to be fully recharged. Charging of the batteries between 80-100% usually takes up to 50% of the charging time. In hybrid operation a charge/ discharge window between 60-80% State of Charge, will be the most energy and cost frequent cycling using a narrow charge/discharge window of the battery capacity will most likely give a more energy more deeper discharge.
11. A site has frequent AC failure. What type of battery will be suitable:
a. High cyclic Battery Correct. b. Deep discharge batter 14. DG + Battery( Frequent and Controlled Cycling)(NSB bluse,OPvZ and Enersys Eon) 15. Battery in fluctuating AC fieldHigh cyclic Battery Correct. 12. A DG site is converted to DG+Battery site which of the following should be done 44. Changes required if the power of DG is increased
61. IP site looses Sync, then what happens (Delay, delay var, pkt loss) IP backhaul network needs what param. for sync? (Delay, delay var, pkt loss)
t functionality.
o the transport functionality of the digital unit the TCU adds the following capabilities to the RBS:
dard indoor rack. It supports the same features as the TCU 02 but has the following hardware differences.16 E1/T1 ports allowing for more GSM RBS to be connect
g for more GSM RBS to be connected to the SIU Inbuilt fan unit needed for forced cooling.
View more...
Comments
