Welcome ! Session 5.8 Supporting Network Planning Tools III by Roland Götz 1 © LS telcom AG 2002 Modern Radio Network Planning Tools Radio Network Planning Tool Interference Analysis Data / Result Output Network Processor Interference Analysis Propagation Prediction Graphical User Interface Data Management Geo Information System 2 © LS telcom AG 2002 Interference by Noise Interference Analysis Wanted field strength F d Minimum field strength F min Noise level F N C/N Noise Minimum field strength (C/N): It is a minimum field strength level which is necessary to fulfil the signal quality for coverage. 1. Criteria for coverage Location of wanted TX Wanted Field Str. > Minimum Field Str. N Fd > F N KN+LCN/M F min Coverage area © LS telcom AG 2002 3 Interference by one Transmitter Nuisance field F n Wanted field strength F d Interference Analysis Protection ratio Interfering field strength F i Nuisance field: Interference field strength at the reference point plus the protection ratio (C/I) required for the considered service. C/N Noise Coverage area with noise only Coverage area with one interfering Tx © LS telcom AG 2002 2. Criteria for coverage Wanted Field Str. > Nuisance Field Str. i Fd > F +M A KL Fn 4 Interference by several Transmitter Usable field strength F u Fd i F 2 C/N Noise Coverage area with noise only Interference Analysis Protection ratio i F 1 Usable field: Summation of the nusiance fields of the interfering tansmitters according to a certain summations algorithm (maximum, simplified multiplication, ...) It is the fieldstrength value which is usable by a possible new site just to fulfill the condition of coverage (C/I>0) by the existing interferer situation. 3. Criteria for coverage Wanted Field Str. > Usable Field Str. Fd > M ∑ F jn =1 K LM j Coverage area with several interfering Tx © LS telcom AG 2002 Fu 5 Procedures of Summation for Interference Calculation Interference Analysis In modern Planning Tools, the cumulation of the single interfering fields can be done in several different ways. The various procedures differ in the way how simplifications are used to minimize the calculation effort. In the following a short overview is given for the procedures which are most often used in interference calculations. 6 © LS telcom AG 2002 Summation Procedures Non-statistical methods: Maximum procedure Power-sum method Statistical methods: Interference Analysis Integration method Log-normal method Multiplication method Simplified multiplication method Simplified Log-normal method Trilinear Log-normal method Most use is made of the power-sum method and the simplified multiplication method Reference CCIR Report 945-2: Methods for the Assessment of Multiple Interference 7 © LS telcom AG 2002 Interference Analysis – Special Applications Automissed Frequency / Channel Assignment Network wide parameter Frequency spectrum Cell specific parameter Interference Analysis Cell relations Number of required carriers Channel constraints Neighbour relations Channel separation matrix Interference Analysis Interference Matrix Allocation algorithm Channel allocation © LS telcom AG 2002 LS Box algorithm Simulated annealing algorithm 8 Interference Analysis – Special Applications Frequency Scan Interference Analysis This function is used to find out gaps in the frequency spectrum where new TV or FM transmitters could be planned. At a desired transmitter site (transmitter coordinate) a wanted transmitter calculation based on a frequency range given by the user is done and the usable field strength calculated for each frequency point. 9 © LS telcom AG 2002 Live Planning Tool Demonstration 10 © LS telcom AG 2002 Modern Radio Network Planning Tools Radio Network Planning Tool Network Processor Data / Result Output Network Processor Interference Analysis Propagation Prediction Graphical User Interface Data Management Geo Information System 11 © LS telcom AG 2002 Network Processor Network Processor The Network Processor • produces network-wide results out of the single-cell-based results • allows to analyse the radio network • allows to simulate changes of the network parameter • allows to simulate changes of the network design • allows to optimise the radio network • allows to plan the future roll-out phases • produces statistics on the selected results Each Service needs an own service-specific Network Processor 12 © LS telcom AG 2002 Coverage of Single Sectors Network Processor 13 © LS telcom AG 2002 Network Processor Network Processor Principle of calculation: Combination of different results BS1 BS2 Result Resultfor forBS BS11 Result Resultfor forBS BS22 BS3 Result Resultfor forBS BS33 BS3 BS2 BS1 Combined Combinedresult result 14 © LS telcom AG 2002 Maximum Field Strength Network Processor Maximum Field Strength: For every pixel, this plot shows the signal level of the cell/transmitter producing the maximum single field strength. Sector 1 Sector 2 Sector 3 Max. Field. -120 -128 -130 -120 -127 -129 -115 -118 -121 -95 -80 -75 -65 -80 -75 -90 -75 -70 -65 -75 -70 -85 -70 -65 -65 -70 -65 -65 -80 -95 -65 -80 -95 -65 -75 -95 15 © LS telcom AG 2002 Maximum Field Strength Network Processor 16 © LS telcom AG 2002 Maximum Field Strength (Network) Network Processor 17 © LS telcom AG 2002 Maximum Server Network Processor Maximum Server: The maximum server plot shows, for a certain pixel, the name of the transmitter featuring the maximum signal; its field strength must exceed the minimum field strength required for coverage, Emin equiv. Sector 1 Sector 2 Sector 3 -120 -128 -130 -120 -127 -129 -115 -118 -121 -95 -80 -75 -90 -75 -70 -85 -70 -65 -65 -80 -95 -65 -80 -95 -65 -75 -95 Max. Server Pmin= -75dBm S3 x S2 S3 S2 S2 S3 S2 S2 18 © LS telcom AG 2002 Maximum Server Network Processor 19 © LS telcom AG 2002 Maximum Server (Network) Network Processor 20 © LS telcom AG 2002 Best Server Network Processor Best Server: The maximum server plot shows, for a certain pixel, the name of the transmitter featuring the maximum signal; its field strength must exceed the minimum field strength required for coverage, Emin equiv and the Minimum C/I Sector 1 Sector 2 Sector 3 -120 -128 -130 -120 -127 -129 -115 -118 -121 -95 -80 -75 -90 -75 -70 -85 -70 -65 -65 -80 -95 -65 -80 -95 -65 -75 -95 Best Server Pmin= -75dBm C/Imin= 7 dB S3 x S2 S3 x S2 S3 x S2 21 © LS telcom AG 2002 Best Server Network Processor Best Server Interference Maximum Server Interference Interference Interference 22 © LS telcom AG 2002 Best Server (Network) Network Processor Maximum Server Best Server 23 © LS telcom AG 2002 C/I at MaxServer Network Processor C/I at Max. Server: C/I at sector with highest power at a certain position Parameters: Minimum Level (Pmin) Sector 1 Sector 2 Sector 3 -120 -128 -130 -120 -127 -129 -115 -118 -121 -95 -80 -75 -90 -75 -70 -85 -70 -65 -65 -80 -95 -65 -80 -95 -65 -75 -95 C/I at Max. Server Pmin= -75dBm 30 x 20 25 5 25 20 5 30 24 © LS telcom AG 2002 C/I at MaxServer Network Processor 25 © LS telcom AG 2002 C/I at MaxServer (Network) Network Processor 26 © LS telcom AG 2002 Network Processor Results Network Processor Many other service-specific results can be processed by a powerful Network Processor, like: • Number of Max Sever • Number Best Server • Strongest Interferer • Level of Strongest Interferer • Coverage Probability • Coverage Reserve • Power Difference • Assignment Probability • Handover Zone • Requeired Channels • Coding Sheme Area (GPRS) • SFN Level Gain • ... 27 © LS telcom AG 2002 Example: Coverage Optimisation GSM Network Regionnetwork of your network Current coverage indoor urban Network Processor Now, we want to improve the coverage in this region. indoor suburban outdoor urban outdoor rural 28 © LS telcom AG 2002 Example: Coverage Optimisation GSM Network Network Processor Candidate Steffisburg A 29 © LS telcom AG 2002 Example: Coverage Optimisation GSM Network Network Processor Candidate Steffisburg B 30 © LS telcom AG 2002 Example: Coverage Optimisation GSM Network Network Processor Candidate Steffisburg C 31 © LS telcom AG 2002 Example: Coverage Optimisation GSM Network Network Processor Direct comparison of the three alternative site positions Selection of Candidate Steffisburg C © LS telcom AG 2002 32 Example: Coverage Optimisation GSM Network Network Processor Previous coverage Improved coverage indoor urban indoor suburban outdoor urban outdoor rural 33 © LS telcom AG 2002 Live Planning Tool Demonstration 34 © LS telcom AG 2002 Modern Radio Network Planning Tools Radio Network Planning Tool Data / Result Output Data / Result Output Network Processor Interference Analysis Propagation Prediction Graphical User Interface Data Management Geo Information System 35 © LS telcom AG 2002 Import and Export Data / Result Output •Import and Export of Databases and Tables ( Sites, Antennas,…) Result Files Measurement Data Should be possible in several formats (.txt, .xls, ASCII, .jpg, …) Planning Tool Database Export Export Import Import 36 © LS telcom AG 2002 Example: Measurement Data Import measurement data Analogue Digital BER Evaluation of measurement data Data / Result Output Rohde&Schwarz, Alcatel, Ericsson TEMS, generic ASCII Plotting of measurement data Calibration Path loss fit Calibration of extended OH model 37 © LS telcom AG 2002 Printing of Maps and Result Plots Data / Result Output Print Process Preview Application specific frame Legend Print in specific map scale Specify margins and borders Multiple printing Support various paper sizes Add site specific information 38 © LS telcom AG 2002 Printing of Database Lists Data / Result Output 39 © LS telcom AG 2002 Live Planning Tool Demonstration 40 © LS telcom AG 2002 Modern Radio Network Planning Tools One fits All? Network Planning Tools for Wireless Communication Systems Mobile Communication analog GSM 3G / UMTS Trunking TETRA Land Mobile Systems © LS telcom AG 2002 Fixed Communication Microwave (PtP) Point to Multipoint (PMP) Wireless Local Loop for: basic coverage maps? interference calculations? network analysis? Broadcast FM TV T-DAB DVB-T „Special“ Systems Satellite Air Traffic Control Maritime Services 41 Is there anything else we can do for you? Software Tools Engineering Services Training Consultancy Solutions for Spectrum Management, GSM900, GSM1800, Microwave Links, PMP, LMDS, Radio/TV Broadcast, DVB, DAB, Trunked Radio, TETRA, Paging, Satellite Services © LS telcom AG 2002 42 LS telcom AG SPECTROCAN Roland Götz Member of the Board rgoetz@LStelcom.com Sailesh Thaker President sailesh.thaker@spectrocan.com Im Gewerbegebiet 31-35 D- 77839 Lichtenau Germany Phone: +49 7227 9535 700 Fax: +49 7227 9535 702 1145 Hunt Club Road Ottawa, Ontario Canada K1V 0Y3 Phone: (613) 526-1661 Fax: (613) 526-5326 www.LStelcom.com www.spectrocan.com 43 © LS telcom AG 2002