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LTE Planning

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The document discusses LTE network planning procedures which involve gathering information, dimensioning capacity and coverage, and detailed planning. The key steps are: 1. Information gathering involves collecting data on subscriber usage patterns, network inventory, RF features, and coverage areas. 2. Dimensioning is divided into capacity and coverage steps. Capacity dimensioning calculates the number of sites needed based on traffic loads. Coverage dimensioning models uplink and downlink budgets to determine signal strengths and cell radii. 3. Detailed planning uses the results of dimensioning to simulate predictions and finalize parameters like transmission settings and neighbor configurations.

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LTE Planning Prepared By: RF Team AbdelRahman Fady & Mohamed Mohsen

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LTE Planning Procedures • Planning process is a very vital process we should do it carefully to get good network performance • LTE Planning Process consists of three main steps as below • Preplanning • Information Gathering • Dimensioning • Detailed planning • Prediction & Simulation • TSS • Code Planning • Neighbors Planning • Parameters planning • Acceptance • SSV • KPIs

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Information gathering • Dimensioning Procedures should follow information gathering job about the nature of the subscriber and the area • We can divide the gathered information into the following • Design Information • Required BLER • Minimum RSRP • Limited MCS • ……. etc. • Inventory information • Number of GSM/UMTS sites • Type of antennas • MIMO existence • TMA existence • …. etc. • RF features • Scheduler type • …… etc. • Subscriber information • Mixed services Traffic Model • Users behaviors • ….etc. • Coverage information • Clutter type • ….etc.

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LTE Dimensioning Concept Dimensioning Procedures should follow information gathering job about the nature of the subscriber and the area Dimensioning could be divided into two main steps as following • Capacity dimensioning • Coverage dimensioning Both capacity and coverage dimensioning process should be balanced Coverage Dimensioning Capacity Dimensioning Gathered Info. • Cell radius (R) • Inter site distance (I) • Number of sites (N) • Main design info

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LTE Dimensioning Concept Dimensioning Procedures should follow information gathering job about the nature of the subscriber and the area Dimensioning could be divided into two main steps as following • Capacity dimensioning • Coverage dimensioning Both capacity and coverage dimensioning process should be balanced N = Total Area / Site Area (A) A = 1.94 * R^2 … directional antenna or A = 2.5 * R^2 … omni antenna D = 1.5 * R

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LTE Dimensioning Concept Coverage Dimensioning Capacity Dimensioning Modify Get ( R ) Get ( N & D )

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Coverage dimensioning • Coverage Dimensioning Steps Coverage Dimensioning Uplink Link budget Downlink Link Budget Get (MAPL) Limited one Get ( R ) , Get ( D ) and Get ( N) Subs. In Propagation Model equation

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage : considering the uplink is the limitation we will start with it. • Bit rate requirement • SINR requirement a0, a1, a2 and a3 are fitted parameters and the SINR is expressed in dB. The semi-empirical parameter a0 represents the maximum obtainable bit rate in one resource block.

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • SINR requirement DL Fitted parameters UL Fitted parameters

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • Bit rate requirement • SINR requirement • eNodeB Receiver sensitivity

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • Bit rate requirement • SINR requirement • eNodeB Receiver sensitivity • Noise rise calculation

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • Bit rate requirement • SINR requirement • eNodeB Receiver sensitivity • Noise rise calculation • UE power per RB

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Link Budget MAPL_Uplink = Pue,rb – eNB_senstivity – penetration loss – body loss – FFM – Noise_rise - LNF_margine – AS_losses + Ant_gain + another Gains Log Normal fading

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Link Budget MAPL_Uplink = Pue,rb – eNB_senstivity – penetration loss – body loss – FFM – Noise_rise - LNF_margine – AS_losses + Ant_gain + another Gains Building penetration Losses

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Coverage dimensioning • Coverage Dimensioning Steps • Uplink Link Budget MAPL_Uplink = Pue,rb – eNB_senstivity – penetration loss – body loss – FFM – Noise_rise - LNF_margine – AS_losses + Ant_gain + another Gains • Car_losses is typically 7 to 8 dB • Fast Fading margine is typically from 0 to 2 dB • Body Loss is typically 0 to 5 dB • AS_losses = Feeder_Loss + Jumber_Loss + connector_losses • Ant_Gain is typically 18 dB • Another system gain like MIMO gain or TMA gain

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • P_RB = HPA_Power / Nrb • Nrb is the number of RB per carrier as explained before • LTE-Ue_senstivity = Nt + Nf + 10 log (Nrb” * 180KHZ) + SINR • Nrb” is number of RBs assigned for single subscriber @ cell edge. It should depend on the required throughput at cell edge.

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • How to get SINR_DL….?

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • How to get SINR_DL….?

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • Interference Margin • Due to using RP = 1 in LTE @ cell edge we have to expect level of interference this level of interference should be varies with cell load hence we have to consider this level of interference during our calculations of MAPL

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains Log Normal fading

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains Building penetration Losses

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Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • Car_losses is typically 7 to 8 dB • Fast Fading margine is typically from 0 to 2 dB • Body Loss is typically 0 to 5 dB • AS_losses = Feeder_Loss + Jumber_Loss + connector_losses + TMA insertion Loss • Ant_Gain is typically 18 dB • Another system gain like MIMO gain or Scheduler gain

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Coverage dimensioning • Get limited MAPL then substitute in propagation model equation to get R • Radius calculation ( R )

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Capacity Dimensioning • Target of capacity dimensioning is to get the number of cells / sites we do need to accommodate the offered traffic. N = Total Number of users / Number of users per site (Nuser) Nuser = No# cells / site * Number of users per cell (Ncell) Ncell = Traffic per cell / traffic per user Capacity Dimensioning Get ( N )

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Capacity Dimensioning • Target of capacity dimensioning is to get the number of cells / sites we do need to accommodate the offered traffic. Capacity Dimensioning Uplink Number of sites Downlink Number of Sites Get (N) Limited one Balance to Get final ( R, D & N) Back with New (N) to Coverage

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Capacity Dimensioning • Cell Capacity Calculation • Cell Capacity calculation • TCell = Tmax * Q • Where • Tmax is the maximum cell throughput • Q is the maximum cell loading factor • Tmax = (((Number of bits / symbol) * 144)/ 1 msec ) * Nrb * MIMO_order * (1- CCH_ratio) • Where • Number of bits / symbol = Modulation order * Code rate • Nrb is the total number of resource block per carrier • CCH_ratio is the ratio of control channels • MIMO_order is the degree of MIMO

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Capacity Dimensioning • Cell Capacity Calculation • User capacity calculation BLER RatioDutySessionTimeSessionbearRatekbitsfficSessionTra   1 1 )( ])*[()(/ ii nRatePenetratiofficSessionTraBHSAkbpsuserroughputBusyHourTh   Bearer Rate: Required Rate for the service Session Time: PPP Session Time Session Duty Ration: what is the percentage of active transmission per session BLER: Block Error Rate BHSA: Busy Hour Session Attempts Penetration Rate: percentage of service user

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Capacity Dimensioning Traffic Modeling Mean Bit Rate (Kbps) PPP Session Time (s) PPP Session Duty Ratio BLER Throughput Per Session (Kbit) UL DL UL DL UL DL UL DL UL DL VoIP 32 32 210 210 0.4 0.4 1% 1% 2715.15 2715.15 Video Phone 64 64 54 54 1 1 1% 1% 3490.91 3490.91 Video conference 128 192 1800 1800 1 1 1% 1% 232727 349091 Interactive Gaming 50 64 1800 1800 0.2 0.4 1% 1% 18181.8 46545.5 Streaming Media 10 300 3600 3600 0.05 0.95 1% 1% 1818.18 1036364 Instant Messaging 20 20 7 7 0.2 0.2 1% 1% 28.2828 28.2828 Web Browsing 8 256 1800 1800 0.05 0.05 1% 1% 727.273 23272.7 Email 256 256 300 300 1 1 1% 1% 77575.8 77575.8

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More Related Content

LTE Planning

  • 1. LTE Planning Prepared By: RF Team AbdelRahman Fady & Mohamed Mohsen
  • 2. LTE Planning Procedures • Planning process is a very vital process we should do it carefully to get good network performance • LTE Planning Process consists of three main steps as below • Preplanning • Information Gathering • Dimensioning • Detailed planning • Prediction & Simulation • TSS • Code Planning • Neighbors Planning • Parameters planning • Acceptance • SSV • KPIs
  • 3. Information gathering • Dimensioning Procedures should follow information gathering job about the nature of the subscriber and the area • We can divide the gathered information into the following • Design Information • Required BLER • Minimum RSRP • Limited MCS • ……. etc. • Inventory information • Number of GSM/UMTS sites • Type of antennas • MIMO existence • TMA existence • …. etc. • RF features • Scheduler type • …… etc. • Subscriber information • Mixed services Traffic Model • Users behaviors • ….etc. • Coverage information • Clutter type • ….etc.
  • 4. LTE Dimensioning Concept Dimensioning Procedures should follow information gathering job about the nature of the subscriber and the area Dimensioning could be divided into two main steps as following • Capacity dimensioning • Coverage dimensioning Both capacity and coverage dimensioning process should be balanced Coverage Dimensioning Capacity Dimensioning Gathered Info. • Cell radius (R) • Inter site distance (I) • Number of sites (N) • Main design info
  • 5. LTE Dimensioning Concept Dimensioning Procedures should follow information gathering job about the nature of the subscriber and the area Dimensioning could be divided into two main steps as following • Capacity dimensioning • Coverage dimensioning Both capacity and coverage dimensioning process should be balanced N = Total Area / Site Area (A) A = 1.94 * R^2 … directional antenna or A = 2.5 * R^2 … omni antenna D = 1.5 * R
  • 7. Coverage dimensioning • Coverage Dimensioning Steps Coverage Dimensioning Uplink Link budget Downlink Link Budget Get (MAPL) Limited one Get ( R ) , Get ( D ) and Get ( N) Subs. In Propagation Model equation
  • 8. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage : considering the uplink is the limitation we will start with it. • Bit rate requirement • SINR requirement a0, a1, a2 and a3 are fitted parameters and the SINR is expressed in dB. The semi-empirical parameter a0 represents the maximum obtainable bit rate in one resource block.
  • 9. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • SINR requirement DL Fitted parameters UL Fitted parameters
  • 10. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • Bit rate requirement • SINR requirement • eNodeB Receiver sensitivity
  • 11. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • Bit rate requirement • SINR requirement • eNodeB Receiver sensitivity • Noise rise calculation
  • 12. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Coverage • Bit rate requirement • SINR requirement • eNodeB Receiver sensitivity • Noise rise calculation • UE power per RB
  • 13. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Link Budget MAPL_Uplink = Pue,rb – eNB_senstivity – penetration loss – body loss – FFM – Noise_rise - LNF_margine – AS_losses + Ant_gain + another Gains Log Normal fading
  • 14. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Link Budget MAPL_Uplink = Pue,rb – eNB_senstivity – penetration loss – body loss – FFM – Noise_rise - LNF_margine – AS_losses + Ant_gain + another Gains Building penetration Losses
  • 15. Coverage dimensioning • Coverage Dimensioning Steps • Uplink Link Budget MAPL_Uplink = Pue,rb – eNB_senstivity – penetration loss – body loss – FFM – Noise_rise - LNF_margine – AS_losses + Ant_gain + another Gains • Car_losses is typically 7 to 8 dB • Fast Fading margine is typically from 0 to 2 dB • Body Loss is typically 0 to 5 dB • AS_losses = Feeder_Loss + Jumber_Loss + connector_losses • Ant_Gain is typically 18 dB • Another system gain like MIMO gain or TMA gain
  • 16. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • P_RB = HPA_Power / Nrb • Nrb is the number of RB per carrier as explained before • LTE-Ue_senstivity = Nt + Nf + 10 log (Nrb” * 180KHZ) + SINR • Nrb” is number of RBs assigned for single subscriber @ cell edge. It should depend on the required throughput at cell edge.
  • 17. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • How to get SINR_DL….?
  • 18. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • How to get SINR_DL….?
  • 19. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • Interference Margin • Due to using RP = 1 in LTE @ cell edge we have to expect level of interference this level of interference should be varies with cell load hence we have to consider this level of interference during our calculations of MAPL
  • 20. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains Log Normal fading
  • 21. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains Building penetration Losses
  • 22. Coverage dimensioning • Coverage Dimensioning Steps • Downlink Link Budget MAPL_Downlink = P_RB – LTE-Ue_senstivity – penetration_loss – Car_Losses – IM - body loss – FFM – LNF_margine – AS_losses + Ant_gain + another system Gains • Car_losses is typically 7 to 8 dB • Fast Fading margine is typically from 0 to 2 dB • Body Loss is typically 0 to 5 dB • AS_losses = Feeder_Loss + Jumber_Loss + connector_losses + TMA insertion Loss • Ant_Gain is typically 18 dB • Another system gain like MIMO gain or Scheduler gain
  • 23. Coverage dimensioning • Get limited MAPL then substitute in propagation model equation to get R • Radius calculation ( R )
  • 24. Capacity Dimensioning • Target of capacity dimensioning is to get the number of cells / sites we do need to accommodate the offered traffic. N = Total Number of users / Number of users per site (Nuser) Nuser = No# cells / site * Number of users per cell (Ncell) Ncell = Traffic per cell / traffic per user Capacity Dimensioning Get ( N )
  • 25. Capacity Dimensioning • Target of capacity dimensioning is to get the number of cells / sites we do need to accommodate the offered traffic. Capacity Dimensioning Uplink Number of sites Downlink Number of Sites Get (N) Limited one Balance to Get final ( R, D & N) Back with New (N) to Coverage
  • 26. Capacity Dimensioning • Cell Capacity Calculation • Cell Capacity calculation • TCell = Tmax * Q • Where • Tmax is the maximum cell throughput • Q is the maximum cell loading factor • Tmax = (((Number of bits / symbol) * 144)/ 1 msec ) * Nrb * MIMO_order * (1- CCH_ratio) • Where • Number of bits / symbol = Modulation order * Code rate • Nrb is the total number of resource block per carrier • CCH_ratio is the ratio of control channels • MIMO_order is the degree of MIMO
  • 27. Capacity Dimensioning • Cell Capacity Calculation • User capacity calculation BLER RatioDutySessionTimeSessionbearRatekbitsfficSessionTra   1 1 )( ])*[()(/ ii nRatePenetratiofficSessionTraBHSAkbpsuserroughputBusyHourTh   Bearer Rate: Required Rate for the service Session Time: PPP Session Time Session Duty Ration: what is the percentage of active transmission per session BLER: Block Error Rate BHSA: Busy Hour Session Attempts Penetration Rate: percentage of service user
  • 28. Capacity Dimensioning Traffic Modeling Mean Bit Rate (Kbps) PPP Session Time (s) PPP Session Duty Ratio BLER Throughput Per Session (Kbit) UL DL UL DL UL DL UL DL UL DL VoIP 32 32 210 210 0.4 0.4 1% 1% 2715.15 2715.15 Video Phone 64 64 54 54 1 1 1% 1% 3490.91 3490.91 Video conference 128 192 1800 1800 1 1 1% 1% 232727 349091 Interactive Gaming 50 64 1800 1800 0.2 0.4 1% 1% 18181.8 46545.5 Streaming Media 10 300 3600 3600 0.05 0.95 1% 1% 1818.18 1036364 Instant Messaging 20 20 7 7 0.2 0.2 1% 1% 28.2828 28.2828 Web Browsing 8 256 1800 1800 0.05 0.05 1% 1% 727.273 23272.7 Email 256 256 300 300 1 1 1% 1% 77575.8 77575.8