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Topics. What is ACP & Key Features How ACP fits in Radio Process Using ACP. ACP Radio Plan. UMTS Seminar. What is an Automatic Cell Planning Tool?. Automatically tunes the physical configuration of a cellular radio network based on prediction and measurement data. Site Selection

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Presentation Transcript

  1. Topics • What is ACP & Key Features • How ACP fits in Radio Process • Using ACP

  2. ACP Radio Plan UMTS Seminar

  3. What is an Automatic Cell Planning Tool? • Automatically tunes the physical configuration of a cellular radio network based on prediction and measurement data. • Site Selection • Antenna Configuration • Height • Tilt • Antenna Direction • Antenna Type • Pilot Power • Does not replace planning tool, but complements • no propagation model • Also useful for post processing and analysing drivetest data • RSCP, Ec/Io, Pilot Pollution, Active Set Size • Key Performance Indicators for events

  4. Parameter1 (eg tilt) Parameter2 (eg azimuth) How ACP Algorithm Works • Based on Powell’s Algorithm • Evaluate one parameter after another • Start from red combination, test combinations and change configuration until best (green) combination reached • + Heuristics: eg. Cells & parameters in order of relevance

  5. What are the advantages of ACP? • Network improvement • Improves radio environment with secured coverage and maximized network quality and capacity. • Efficiency Gains • Speed – runs faster than manual process. Depends on a few factors: PC performance, Size of area to optimise, Resolution of data and number of changes • Minimal user input – lower cost of service, focus on high margin work • Accurate Modelling • Predictions are more realistic than planning tool because based on real drivedata.

  6. What are the disadvantages of ACP? • Garbage in, Garbage out • Poor propagation model will be a problem in design phase • Key: Input data needs to be accurate and complete • Drive data should be thorough for higher accuracy • Need to control changes • Eg don’t uptilt boomer sites • Need to review changes • some can be aggressive

  7. ACP Features • Path Loss Tuning • Process of using drivetest data to adjust the path loss predictions for higher accuracy • Neighbour List Optimisation • User Levels • Administrator can lock certain parameters to ensure consistent settings • Post Processing capabilities • Useful for many technologies: • GSM, UMTS/HSDPA, CDMA/EVDO, Indoor • Compatible with most popular tools • Planning: Asset, Atoll, CellPlanner, Odyssey • Measurement: TEMS, Agilent, Panasonic

  8. Topics • What is ACP & Key Features • How ACP fits in Radio Process • Using ACP

  9. Nominal Cell Plan InFill and Optimisation Detailed Design ACP Initial Tuning How ACP fits the radio process

  10. ACP Workflow Input Data Data Validation Pathloss Tuning Network Optimization Results Evaluation Validation

  11. Topics • What is ACP & Key Features • How ACP fits in Radio Process • Using ACP

  12. Inputs • Planning Tool • Site configuration files • Path Loss predictions • Map data • terrain • clutter • Traffic Matrix • Cluster/Market Polygons • Eg Tab/mif format • Drive Test Measurements • Optional, but recommended • Eg TEMS FMT files

  13. Drive Route Definition • Only scanner required • Cover every cell in the cluster thoroughly • The more drive test data used, the more accurate the tuning. • Density depends on • Terrain • Clutter • Time

  14. Measurement Data Display

  15. Comparing Cell Coverage • Can also use to identify swapped feeders

  16. Path Loss Tuning Concept • Pathloss tuning corrects the predicted pathloss maps directly according to the pilot RSCP measurements from drive tests. • Two types of tuning • Local: those pixels with drive test data • Global: those pixels without drive test data • Ensure the Scrambling Codes and Cell_IDs in the planning tool and ACP match the real network

  17. Path Loss Tuning Process Error before: 4.1dB Error after: 0.7dB

  18. Path Loss Tuning Results

  19. Settings for Optimisation (1) • Site Constraints • Depending on real world constraints • Done on a site by site or global basis • Types: Electrical Tilt, Mechanical Tilt, Pilot Power, Antenna Direction, Antenna Type • Antenna Families • Each antenna has a set of electrical tilts = “family” • During optimisation, ACP will choose best pattern in family • Important: Planning Tool should be loaded with all antennas and patterns before using ACP • Antenna Groups • For antenna type optimisation, each antenna is assigned a group • During optimisation, ACP can select the best antenna within the group • Site Candidate Groups • During planning or expansion programs, ACP can assign the best candidate amongst a group of defined sites • It can also choose the best height of the candidates

  20. Settings for Optimisation (2) • Optimisation Type • RSCP or Ec/Io • RF Requirements • RSCP Target • RSCP Coverage Area % • Ec/Io Target • Clutter constraints • Traffic/Load • can be loaded from planning tool, or load based • Includes HSDPA if required • Cost Control • Can add cost metrics to each type of change to calculate cost and try to manage budgets • Number of Changes • Number of runs • Size of changes • Priority of changes

  21. Example Report

  22. Example Statistics

  23. Example Plots – Ec/Io before after

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