A.17.20.1 Description of the model
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This path loss model was developed by ITU-R and its detailed description can be found in [1]. The model was developed for the evaluation of candidate IMT-Advanced Radio Interface Technologies in the frequency band 2–6 GHz and for the following environments: urban macro (UMa), urban micro (UMi), suburban macro (SMa), rural macro (RMa), and indoor hotspot (InH). Note that only outdoor scenarios UMa, SMa, and RMa are implemented in SEAMCAT. The path loss model from Report ITU-R M.2135-1 is an empirical path loss model based on measurements results carried out in IST-WINNER II project [2], as well as results from the literature. The model supports LOS and NLOS propagation conditions as well as the LOS probabilities. This model includes clutter loss and as such, it is not to be combined with the clutter loss model of Recommendation ITU-R P.2108-0.
Table 1: ITUITU-R M.2135-1 Path Loss model
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Scenario
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LOS/NLOS
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Path Loss [dB]
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Shadow fading std [dB]
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Applicability ranges and default values [m]
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Urban Macro (UMa)
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LOS
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PLUMa-LOS= PL1, 10 m≤d≤dBP'PL2, dBP'≤d≤5 km , (see Note 1)
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σSF=4
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hMS=1.5
hBS=25
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PL1=28.0+22log10d+20log10fc
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PL2=7.8+40log10d-18.0log10hBS'-18.0log10hMS'+2.0log10fc
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NLOS
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PLUMa-NLOS=161.04-7.1log10W+7.5log10h-24.37-3.7hhBS2log10hBS+(43.42-3.1log10hBS))log10d-3+20log10 fc-(3.2log1011.75hMS2-4.97)
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σSF=6
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hBS=25
hMS=1.5
W=20
h=20
10≤d≤5000
10≤hBS≤150
1≤hMS≤10
5≤W≤50
5≤h≤50
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Suburban Macro (SMa)
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LOS
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PLSMa-LOS= PL1, 10 m≤d≤dBP'PL2, dBP'≤d≤5 km , (see Note 2)
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PL1=20log10(40πd3Dfc/3)+min0.03h1.72, 10log10d- min0.044h1.72, 14.77+0.002dlog10h
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σSF=4
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PL2=PL1dBP+40log10ddBP
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σSF=6
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NLOS
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PLSMa-NLOS=161.04-7.1log10W+7.5log10h-24.37-3.7hhBS2log10hBS+(43.42-3.1log10hBS)(log10d-3)+20log10fc-(3.2log1011.75hMS2-4.97)
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σSF=8
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Rural Maro (RMa)
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LOS
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PLRMa-LOS= PL1, 10 m≤d≤dBP'PL2, dBP'≤d≤10 km , (see Note 2)
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PL1=20log10(40πdfc/3)+min0.03h1.72, 10log10d- min0.044h1.72, 14.77+0.002dlog10h
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σSF=4
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PL2=PL1dBP+40log10ddBP
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σSF=6
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NLOS
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σSF=8
Note 1:
Breakpoint distance dBP'=4hBS'hMS'fc/c, where fc 
Note 1:
Breakpoint distance
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Note 2:
Break point distance dBP=2πhBShMSfc
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SEAMCAT specific implementation:
hBS=maxhTx, hRx
hMS=minhTx, hRx
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Table 2: LOS Probability
Scenario | LOS probability | ||||||||||||||
UMa |
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SMa | PLOS=1, d≤10exp-d-101000
| RMa |
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| RMa |
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Note: According to Report ITU-R M.2135-1, the LOS probabilities are used only for system level simulations.
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The input parameters for the path loss model ITU-R M.2135-1 are shown in Figure 1 and defined in Table 3.
Figure 1: GUI of the ITU-R M.2135-1 path loss model
Table 3: Parameters of the ITU-R M.2135-1 path loss model
Description | Symbol | Type | Unit | Comments |
Variation | σSF | B | dB | Variation in path loss (applies shadow fading) |
Scenario | - | S | - | Urban Macro Cell (UMa), Suburban Macro Cell (SMa) or Rural Macro Cell (RMa) |
Line of Sight | - | S | - | Line of Sight (LOS), Non-Line of Sight (NLOS), or LOS Probabilities |
Street width | W | D | m | Average street width |
Building height | h | D | m | Average building height |
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