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A.17.20.1 Description of the model

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Note 1:
Breakpoint distance dBP'=4hBS'hMS'fc/c, where

Mathinline
body--uriencoded--%7B\ d%7D_%7BBP%7D%5e\prime=4h_%7BBS%7D%5e\prime h_%7BMS%7D%5e\prime f_c/c,
 where fc is the centre frequency in Hz, c=3×108 m/s is the propagation velocity in free space, and hBS' and hMS' are the effective antenna heights at the BS and the MS, respectively. The effective antenna heights hBS' and hMS' are computed as follows: hBS'=hBS-hE, hMS'=hMS-hE, where hBS and hMS are the actual antenna heights, and hE is the effective environment height assumed to be hE=1 m.

Note 2:
Break point distance dBP=2πhBShMSfc

Mathinline
body--uriencoded--d_%7BBP%7D=2\pi h_%7BBS%7Dh_%7BMS%7Df_c/c,
where
 where fc is the centre frequency in Hz, c=3×108 m/s is the propagation velocity in free space, and hBS and hMS are the antenna heights at the BS and the MS, respectively.

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SEAMCAT specific implementation:hBS=maxhTx, hRx
hMS=minhTx, hRx

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body--uriencoded--h_%7BBS%7D=\max%7B\left(h_%7BTx%7D,\ h_%7BRx%7D\right)%7D

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body--uriencoded--h_%7BMS%7D=\min%7B\left(h_%7BTx%7D,\ h_%7BRx%7D\right)%7D



Table 2: LOS Probability

Scenario

LOS probability

UMa

Mathinline
body--uriencoded--P_%7BLOS%7D=\min%7B\left(\frac%7B18%7D%7Bd%7D,\ 1\right)%7D\cdot\left(1-\exp%7B\left(-\frac%7Bd%7D%7B63%7D\right)%7D\right)%7B+%7D\exp%7B\left(-\frac%7Bd%7D%7B63%7D\right)%7D

SMa

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body--uriencoded--P_%7BLOS%7D=1,d≤10

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body--uriencoded--P_%7BLOS%7D=exp(-(d-10)/200) ,d>10
RMa

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body--uriencoded--P_%7BLOS%7D=1,d≤10

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body--uriencoded--P_%7BLOS%7D=exp(-(d-10)/1000) ,d>10

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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.
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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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