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3G Radio Network Planning

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3G Radio Network Planning

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3G Radio Network Planning

  1. 1. Toha Ardi Nugraha Radio Network Planning Yogyakarta, 26-27 November 2014 @Universitas Islam Indonesia
  2. 2. Syllabus •Mobile Communication Technology •3G RNP Overview •RNP Concept –Step Radio Network Planning –GSM, 3G, and LTE Differences •Radio Network Dimensioning –Link Budget Calculation •Simulation •Analysis
  3. 3. Mobile Communication Technology -Mobile Cellular Concept -Mobile Cellular Evolution -System Architecture -3G WCDMA Concept -Radio Aspect/Physical Layer
  4. 4. Mobile Cellular Concept Cell Ideal Cell Real Cell Model
  5. 5. Cell Configuration Example : Antenna
  6. 6. Cell Design •Macrocell(>5km) •Microcell(3-<5km) •Picocell (<1km) •Femtocell/Small cells (<200m)
  7. 7. Interference •Co Channel Interference •Adjacent Channel Interference •Intersystem Interference
  8. 8. Frequency Reuse •Limited Spectrum Frequency •Efficiency Spectrum
  9. 9. Mobile Cellular Evolution
  10. 10. Data Transmission Evolution
  11. 11. GSM & UMTS Evolution
  12. 12. GSM and 3G Architectures
  13. 13. Long Term Evolution
  14. 14. 3G WCDMA - Wideband CDMA Radio access technology for one of the UMTS access modes (UTRA FDD) using 5 MHz duplex channels. – Frame length is of 10 msec, Chip rate is 3.84 Mcps – All users share the same frequency and time domain – Users separated by the codes
  15. 15. UMTS Radio Frequency Ranges
  16. 16. Channelization in UMTS
  17. 17. WCDMA Channel (Cont.'s)
  18. 18. Handover Concept
  19. 19. Handover Method •Softer Handover •Soft Handover •Hard Handover
  20. 20. Radio Network Planning -RNP Overview -Objective -GSM and 3G Planning Differences -Radio Network Dimensioning -Power Link Budget
  21. 21. Radio Network Planning Overview Radio Network Planning? According to deployment and evolution requirements, as well as cost- effectiveness consideration, generate the amount of Network Elements (NE), NE configuration, and Transmission design between different NE. RNS RNC RNS RNC Core Network Node B Node B Node B Node B Iu Iu Iur Iub Iub Iub Iub Network Planning Scope: •Core network:focus on CN element dimension and configuration. •Radio network:focus on RAN element dimension and configuration •Transmission network:focus on link dimension and configuration between network elements.
  22. 22. Radio Network Planning Solution •3G Radio network planning (NodeB/RNC) •3G Transmission network planning (Iu/Iur/Iub) •3G Core network planning (CS/PS domain) 3G RNP tools development  Network KPI  Pilot pollution  Soft-handover ratio and probability  Access probability of different services  Best Server Distribution  CE dimension  Estimation result
  23. 23. Objectives of Network Planning The RF Design of wireless system revolves four main principles. These principles are Coverage, Capacity, Quality and Cost. And further, adapt to the future network development and expansion. Coverage Capacity Quality Cost Realization of excellent balance of all aspect via networks planning
  24. 24. GSM and 3G Planning Differences •Realize 1×1 frequency reuse •The capacity per WCDMA cell is “soft” for it is related to environment and neighbor cell interference. •Supports multiple services with different speed rate and QoS, and each service has different coverage range. •Adopts cellular network structure and frequency planning to guarantee intra/inter-frequency interference •Users supported can be calculated from carriers and timeslots if the interference meets the requirements. •Provides voice service GSM 3G
  25. 25. 3G RNP Procedure Overview Capacity Quality Coverage Interference Final design preparation Dimensioning Nominal Planning Site survey Deployment Detailed planning & pre-optimization Preliminary design
  26. 26. Radio Network Dimensioning Coverage related Coverage area Coverage probability Capacity related Traffic model Service model User density Quality related QoS requirements GoS requirements Demodulation threshold System dimensioning Number of sites System configuration Sector structure Number of carriers Cost on network construction Site cost Equipment cost Input Output Coverage design Capacity design
  27. 27. Power Link Budget  Receiver Sensitivity  PDCH_Max  Minimum Required Signal Strength  EiRP  PUE_Max • Slow Fading Margin • Penetration Loss TX RX Duplexer    Antenna UE PL_DL PL_UL • Body Loss • Interference Margin • Fast Fading Margin • Margin for Background Noise TX RX Duplexer    Cable Antenna Node B • Interference Margin • Fast Fading Margin • Margin for Background Noise Soft Handover Area • SHO Gain
  28. 28. Example Calculation Coverage
  29. 29. Propagation
  30. 30. Cell Range Propagation Model Area Voice
  31. 31. Example Calculation Capacity Blocking Probability 2% Erlang B Table
  32. 32. Nominal Planning Based on the result of network dimension, preliminary design present Information of theoretical sites including following : Site coordinates. Engineering parameters such as Antenna height, azimuths and tilts. Radio parameters such as scrambling code ,transmit power of different channels , etc.
  33. 33. Software Simulation •Simulation Flow Chart •Simulation Output •Step by Step •Verification by System Simulation
  34. 34. Introduction Why should simulation be performed in 3G radio network planning?
  35. 35. Simulation is one of Important Step for Network Planning Simulation is oriented to simulate the running situation of networks under the current network configuration so as to facilitate decision-making adjustment. Adopt the planning software to perform simulation based on various types of BTS coverage area, the number of BTSs within the coverage area, and the configuration of each BTS. All these are obtained from traffic coverage analysis.
  36. 36. Introduction Atoll Software •Be a professional radio network design tool, supporting GSM/TDMA, GPRS-EDGE, cdmaOne, W-CDMA/UMTS and CDMA2000/1x RTT/EVDO. It is specially designed for 3G. •Realize mobility of planning design, supporting both single system configuration and Enterprise server-based network configuration. The single system configuration does not require connecting external database and users still can share engineering data. •Feature modern software structure as well as open and extendable platform
  37. 37. Simulation Step by Step
  38. 38. Atoll Simulation Step 1.Preparation 2.Start Project 3.Configure Coordinate 4.Import Digital Maps 5.Set Propagation Model 6.Draw Zone 7.Make Prediction based on Coverage 8.Monte Carlo Simulation 9.Make Prediction based on Simulation 10.Check Planning Results
  39. 39. Start Project UMTS HSDPA
  40. 40. Configure Coordinate
  41. 41. Composition of a Digital Map A digital map basically consists of the following three components, stored under three directories respectively. •Heights : Digital elevation model (DEM): describe basic landforms of this area and directly participate in radio propagation model calculation •Clutter : Digital clutter model (DOM): clutter classification data describes clutter coverage on the ground, such as forest, lake, open area, industrial area, urban area, high-storey building area. It is used during calculating radio propagation path loss. •Vector : Linear vector model (LDM): linear clutter vector data describes plane distribution and space relationship of linear clutters, including speedway, street and river.
  42. 42. Simulation Output Simulation Parameter •Pilot coverage (Ec, Ec/Io) in the target areas •Best server plot •Coverage probability distribution of each service •Access failure distribution and statistic of each service •Continuous coverage areas of each service •Cell load distribution of downlink and uplink •Pilot pollution distribution •Soft handover areas statistic of each service
  43. 43. Task and Excercise •Find map of Yogyakarta City •Find number of users in Yogyakarta City •Plot Cells –Based on Calculation of Coverage Cell –Based on Capacity Calculation
  44. 44. Interface Map Propagation Model
  45. 45. Import Digital Maps MAP : Vector Clutter Height
  46. 46. Set Propagation Model Duplicate
  47. 47. Cell Planning
  48. 48. Draw Zone
  49. 49. Make Prediction based on Coverage
  50. 50. Check Planning Result
  51. 51. Check Planning Result •View  Legend Windows •Generate Report
  52. 52. Verification by System Simulation It is an iterative process to verify the final design until all the requirements are fulfilled Coverage prediction RNP Planning results Are Requirements Fulfilled? Traffic distribution System simulation
  53. 53. UMTS Optimization
  54. 54. UMTS Optimization •UMTS performance indicator •Problem Signature •Tuning network –Specific Neighbor list –Managing excessive soft handoff
  55. 55. UMTS Performance Indicator •KPI Target : –RSCP (good > -85 dBm) –Ec/No ( > -8 dB) –BER (98%) –Analyze Pilot Pollution Area
  56. 56. Improving coverage
  57. 57. Pilot Pollution
  58. 58. Antenna Fine Tuning
  59. 59. Tuning the Network
  60. 60. References •Atoll Manual •U-Net Planning Tools •Huawei, WCDMA RNP & RNO Conspectus
  61. 61. 감사합니다

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