Page 704 - 5G Basics - Core Network Aspects

2 Transport aspects

For all breakpoints, the values of PSDn shall be defined with the following restrictions, except for the LESM
defined in clause 7.3.1.1.2.2.
• For tn < tn+1, the slope of the MIBPSDMASK levels shall comply with:

PSD 1  n  PSD n  . 0 75 dB/51.75 kHz
t t
1  n n
• min(PSDn)  −90 dBm/Hz and max(PSDn) − min(PSDn)  40 dB, where max(PSDn) denotes the
maximum and min(PSDn) denotes the minimum of all breakpoint PSD values at or above
−90 dBm/Hz.

The MIBPSDMASK at an arbitrary frequency f shall be obtained by interpolation in dB on a linear frequency
scale as follows:

( / f 51.75 kHz ) t
MIB PSDMASK ( ) f  PSD  ( PSD  PSD ) n , t ( / f 51.75 kHz )  t
1 
n
n
n
t n 1  t n n n 1 
Figure 7-2 illustrates the MIBPSDMASK in the case no LESM is specified (with min(PSDn) = PSD5 and
max(PSDn) = PSD3).

Figure 7-2 – Illustration of a MIBPSDMASK when no LESM is specified

7.3.1.1.2.2 Definition of the breakpoints for the LESM
The breakpoints of the LESM shall be:
• (t1, PSD1): t1 = ceiling(ftr1 / 51.75 kHz), PSD1 = −100 dBm/Hz
• (t2, PSD2): t2 = ceiling((ftr3−175 kHz)/51.75 kHz), PSD2 = −100 dBm/Hz

• (t3, PSD3): t3 = ceiling(ftr3 /51.75 kHz), PSD3 = −80 dBm/Hz
– the valid values for ftr3 are ftr3 ≥ ftr1+175 kHz
• further breakpoints (t4, PSD4), ..., (tn, PSDn), ..., (tNBP, PSDNBP)
– shall be according to the requirements for the breakpoints for the regular PSD shaping as
defined in clause 7.3.1.1.2.1, or
– shall be according to the requirements for the one-slope steep upward shape as defined in
clause 7.3.1.1.2.2.1

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