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 1) |
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 |
| 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 |
| n13 | 15 kHz | Case A | 1871 – <1> – 1885 |
| n14 | 15 kHz | Case A | 1901 – <1> – 1915 |
| n18 | 15kHz | CaseA | 2156 – <1> – 2182 |
| n20 | 15 kHz | Case A | 1982 – <1> – 2047 |
| n24 | 15 kHz | Case A | 3818 – <1> – 3892 |
| 30 kHz | Case B | 3824 – <1> – 3886 | |
| n25 | 15 kHz | Case A | 4829 – <1> – 4981 |
| n26 | 15 kHz | Case A | 2153 – <1> – 2230 |
| 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 | NOTE 3 |
| 30 kHz | Case C | 5036 – <1> – 5050 | |
| n38 | 15 kHz | Case A | NOTE 2 |
| 30 kHz | Case C | 6437 – <1> – 6538 | |
| n39 | 15 kHz | Case A | NOTE 4 |
| 30 kHz | Case C | 4712 – <1> – 4789 | |
| n40 | 30 kHz | Case C | 5762 – <1> – 5989 |
| n41 | 15 kHz | Case A | 6246 – <3> – 6717 |
| 30 kHz | Case C | 6252 – <3> – 6714 | |
| n46 | 30 kHz | Case C | 8993 – <1> – 9530 |
| n48 | 30 kHz | Case C | 7884 – <1> – 7982 |
| n50 | 30 kHz | Case C | 3590 – <1> – 3781 |
| n51 | 15 kHz | Case A | 3572 – <1> – 3574 |
| n53 | 15 kHz | Case A | 6215 – <1> – 6232 |
| n65 | 15 kHz | Case A | 5279 – <1> – 5494 |
| n66 | 15 kHz | Case A | 5279 – <1> – 5494 |
| 30 kHz | Case B | 5285 – <1> – 5488 | |
| n67 | 15 kHz | Case A | 1850 – <1> – 1888 |
| 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 |
| n85 | 15 kHz | Case A | 1826 – <1> – 1858 |
| n90 | 15 kHz | Case A | 6246 – <1> – 6717 |
| 30 kHz | Case C | 6252 – <1> – 6714 | |
| n91 | 15 kHz | Case A | 3572 – <1> – 3574 |
| n92 | 15 kHz | Case A | 3584 – <1> – 3787 |
| n93 | 15 kHz | Case A | 3572 – <1> – 3574 |
| n94 | 15 kHz | Case A | 3584 – <1> – 3787 |
| n96 | 30 kHz | Case C | 9531 – <1> – 10363 |
| NOTE 1: SS Block pattern is defined in clause 4.1 in TS 38.213 [10]. | |||
| NOTE 2: The applicable SS raster entries are GSCN = {6432, 6443, 6457, 6468, 6479, 6493, 6507, 6518, 6532, 6543} | |||
| NOTE 3: The applicable SS raster entries are GSCN = {5032, 5043, 5054} | |||
| NOTE 4: The applicable SS raster entries are GSCN = {4707, 4715, 4718, 4729, 4732, 4743, 4747, 4754, 4761, 4768, 4772, 4782, 4786, 4793} | |||
| NOTE 5: The following GSCN are allowed for operation in band n46: | |||
| GSCN = {8996, 9010, 9024, 9038, 9051, 9065, 9079, 9093, 9107, 9121, 9218, 9232, 9246, 9260, 9274, 9288, 9301, 9315, 9329, 9343, 9357, 9371, 9385, 9402, 9416, 9430, 9444, 9458, 9472, 9485, 9499, 9513}. | |||
| NOTE 6: The following GSCN are allowed for operation in band n96: | |||
| GSCN = { 9548, 9562, 9576, 9590, 9603, 9617, 9631, 9645, 9659, 9673, 9687, 9701, 9714, 9728, 9742, 9756, 9770, 9784, 9798, 9812, 9826, 9840, 9853, 9867, 9881, 9895, 9909, 9923, 9937, 9951, 9964, 9978, 9992, 10006, 10020, 10034, 10048, 10062, 10076, 10090, 10103, 10117, 10131, 10145, 10159, 10173, 10187, 10201, 10214, 10228, 10242, 10256, 10270, 10284, 10298, 10312, 10325, 10339, 10353}. | |||
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 |
| 240 kHz | Case E | 22390 – <2> – 22556 | |
| n258 | 120 kHz | Case D | 22257 – <1> – 22443 |
| 240 kHz | Case E | 22258 – <2> – 22442 | |
| n259 | 120 kHz | Case D | 23140 – <1> – 23369 |
| 240 kHz | Case E | 23142 – <2> – 23368 | |
| n260 | 120 kHz | Case D | 22995 – <1> – 23166 |
| 240 kHz | Case E | 22996 – <2> – 23164 | |
| n261 | 120 kHz | Case D | 22446 – <1> – 22492 |
| 240 kHz | Case E | 22446 – <2> – 22490 | |
| n262 | 120 kHz | Case D | 23586 – <1> – 23641 |
| 240 kHz | Case E | 23588 – <2> – 23640 | |
| NOTE: SS Block pattern is defined in section 4.1 in TS 38.213 [10]. | |||
Update1: Update to 3GPP 38.104 Release 17 v 17.2.0 (2021-07)
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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?
Hi guys,
when I find GSCN greater than 4800Mhz in n79, “5G NR GSCN to SSref (SSB) Frequency Calculator” made the proper ARFCN and MHz result.
However, when I put the ARFCN and MHz result to “5G NR SSref (SSB) Frequency to GSCN Calculator” and “5G NR SSref (SSB) ARFCN to GSCN Calculator”, the result show “not standart”.
For example, GSCN 8784 is 4850.4Mhz and ARFCN 723360.
However when I put 4850.4 Mhz and ARFCN 723360, the result is “not stadrt” and nearest GSCN shows 8784.
Could you explain why the result shows like that?
Thank you!