**Radio Frame on which UE will receive the SIB can be calculated as:**

```
SFN mod T = FLOOR(x/10)
```

**Subframe on which SI window will start for the corresponding radio frame is**

```
a = x mod 10
value of x = (n -1) * w
```

n - number which represents the order of entry in scheduling info list.

For Example:-

For SIB2, n = 1

For SIB3, n = 2 and so on

w - SI window length ( 20 ms in our case)

T - SI periodicity of the corresponding SI message

**Now lets calculate for SIB3:**

**Subframe from which SI window will start for SIB3**

```
x = (2 - 1) * 20 = 20
a = 20 mod 10 = 0
```

so, the SI window will start from subframe 0 for the corresponding radio frame.

Radio Frame on which SIB3 will come

```
SFN mod T = FLOOR ( x /10 )
```

T = rf64 = 640 ms

SFN mod 640 = FLOOR ( 20 / 10 )

SFN mod 640 = 2

So, SIB3 will come on the radio frame for which SFN mod 640 = 2. UE will start looking for SIB3 from subframe number 0 of radio frame till the end of window length.