NR Radio Frame Structure

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NR Radio Frame Structure

As described above, in 5G/NRmultiple numerologies(waveform configuration like subframe spacing) aresupported and the radio frame structure gets a little bit different dependingon the type of the numerology. However, regardless of numerology the length ofone radio frame and the length of one subfame is same.  The length of a RadioFrame is always 10 ms and the length of a subframe is always 1 ms.

Then what should get differentto accomondate the physical property of the different numerology ? The anwer isto put different number of slots within one subfame. There is another varyingparameter with numerology. It is the number of symbols within a slot. However,the number of symbols within a slot does not change with the numberology, itonly changes with slot configuration type. For slot configuration 0, the numberof symbols for a slot is always 14 and for slot configuration 1, the number ofsymbols for a slot is always 7.

Now let's look into the detailsof radio frame structure for each numerology and slot configuration.

1.< Normal CP, Numerology = 0 >

In this configuration, asubframe has only one slot in it, it means a radio frame contains 10 slots init. The number of OFDM symbols within a slot is 14.

2.< Normal CP, Numerology = 1 >

In this configuration, a subframe has 2 slots in it,it means a radio frame contains 20 slots in it. The number of OFDM symbolswithin a slot is 14.

3.< Normal CP, Numerology = 2 >

In this configuration, asubframe has 4 slots in it, it means a radio frame contains 40slots in it. The number of OFDM symbols within a slot is 14.

4.< Normal CP, Numerology = 3 >

In this configuration, asubframe has 8 slots in it, it means a radio frame contains 80slots in it. The number of OFDM symbols within a slot is 14.

5.< Normal CP, Numerology = 4 >

In this configuration, asubframe has 16 slots in it, it means a radio frame contains160 slots in it. The number of OFDM symbols within a slot is 14.

6.< Normal CP, Numerology = 5 >

In thisconfiguration, a subframe has 32 slots in it, it means a radio framecontains 320 slots in it. The number of OFDM symbols within a slot is14.

7.< Extended CP, Numerology = 2 >

In thisconfiguration, a subframe has 8 slots in it, it means a radio framecontains 80 slots in it. The number of OFDM symbols within a slot is12.