This Page provides information about 5G NR GSCN (Global Synchronization Channel Number) Calculator. Calculator is based on 3GPP TS 38.104 Release 15 specification.
It will help you to convert the number of the 5G NR GSCN (Global Synchronization Channel Number) to the 5G NR SSref (SSB) frequency and back (5G NR SSref frequency to 5G NR GSCN)
Example: 5G NR GSCN = 7725, 5G SSref Frequency = 3325.44 MHz
The formula for 5G NR GSCN is described in 3GPP TS 38.104 chapter 5.4.3
Table 5.4.3.1-1: GSCN parameters for the global frequency raster
Range of frequencies (MHz) | SS block frequency position SSREF | GSCN | Range of GSCN |
0 – 3000 | N * 1200 kHz + M * 50 kHz, N = 1:2499, M ϵ {1,3,5} (Note) | 3N + (M-3)/2 | 2 – 7498 |
3000 – 24250 | 3000 MHz + N * 1.44 MHz, N = 0:14756 | 7499 + N | 7499 – 22255 |
24250 – 100000 | 24250.08 MHz + N * 17.28 MHz, N = 0:4383 | 22256 + N | 22256 – 26639 |
NOTE: The default value for operating bands which only support SCS spaced channel raster(s) is M=3. |
Table 5.4.3.3-1: Applicable SS raster entries per operating band (FR1)
NR operating band | SS Block SCS | SS Block pattern (note) | Range of GSCN (First – <Step size> – Last) |
n1 | 15 kHz | Case A | 5279 – <1> – 5419 |
n2 | 15 kHz | Case A | 4829 – <1> – 4969 |
n3 | 15 kHz | Case A | 4517 – <1> – 4693 |
n5 | 15 kHz | Case A | 2177 – <1> – 2230 |
n5 | 30 kHz | Case B | 2183 – <1> – 2224 |
n7 | 15 kHz | Case A | 6554 – <1> – 6718 |
n8 | 15 kHz | Case A | 2318 – <1> – 2395 |
n12 | 15 kHz | Case A | 1828 – <1> – 1858 |
n14 | 15 kHz | Case A | 1901 – <1> – 1915 |
n18 | 15kHz | CaseA | 2156 – <1> – 2182 |
n20 | 15 kHz | Case A | 1982 – <1> – 2047 |
n25 | 15 kHz | Case A | 4829 – <1> – 4981 |
n28 | 15 kHz | Case A | 1901 – <1> – 2002 |
n29 | 15 kHz | Case A | 1798 – <1> – 1813 |
n30 | 15 kHz | Case A | 5879 – <1> – 5893 |
n34 | 15 kHz | Case A | 5030 – <1> – 5056 |
n38 | 15 kHz | Case A | 6431 – <1> – 6544 |
n39 | 15 kHz | Case A | 4706 – <1> – 4795 |
n40 | 15 kHz | Case A | 5756 – <1> – 5995 |
n41 | 15 kHz | Case A | 6246 – <3> – 6717 |
n41 | 30 kHz | Case C | 6252 – <3> – 6714 |
n48 | 30 kHz | Case C | 7884 – <1> – 7982 |
n50 | 15 kHz | Case A | 3584 – <1> – 3787 |
n51 | 15 kHz | Case A | 3572 – <1> – 3574 |
n65 | 15 kHz | Case A | 5279 – <1> – 5494 |
n66 | 15 kHz | Case A | 5279 – <1> – 5494 |
n66 | 30 kHz | Case B | 5285 – <1> – 5488 |
n70 | 15 kHz | Case A | 4993 – <1> – 5044 |
n71 | 15 kHz | Case A | 1547 – <1> – 1624 |
n74 | 15 kHz | Case A | 3692 – <1> – 3790 |
n75 | 15 kHz | Case A | 3584 – <1> – 3787 |
n76 | 15 kHz | Case A | 3572 – <1> – 3574 |
n77 | 30 kHz | Case C | 7711 – <1> – 8329 |
n78 | 30 kHz | Case C | 7711 – <1> – 8051 |
n79 | 30 kHz | Case C | 8480 – <16> – 8880 |
[n90] | 15 kHz | Case A | 6246 – <1> – 6717 |
[n90] | 30 kHz | Case C | 6252 – <1> – 6714 |
NOTE: SS Block pattern is defined in section 4.1 in TS 38.213 [10]. |
Table 5.4.3.3-2: Applicable SS raster entries per operating band (FR2)
NR operating band | SS Block SCS | SS Block pattern (note) | Range of GSCN (First – <Step size> – Last) |
n257 | 120 kHz | Case D | 22388 – <1> – 22558 |
n257 | 240 kHz | Case E | 22390 – <2> – 22556 |
n258 | 120 kHz | Case D | 22257 – <1> – 22443 |
n258 | 240 kHz | Case E | 22258 – <2> – 22442 |
n260 | 120 kHz | Case D | 22995 – <1> – 23166 |
n260 | 240 kHz | Case E | 22996 – <2> – 23164 |
n261 | 120 kHz | Case D | 22446 – <1> – 22492 |
n261 | 240 kHz | Case E | 22446 – <2> – 22490 |
NOTE: SS Block pattern is defined in section 4.1 in TS 38.213 [10]. |
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In 5G NR SSref (SSB) ARFCN to GSCN Calculator:
when arfcn is 249,250,251, all return GSCN as 2.
GSCN 2 is only mapped to arfcn 250, right?