Time period of a Time slot

[plannerguy]

Hi Freinds,



please explain how you are able to calculate the time of one "time slot".

I now it is 0.577micro seconds , in every doc it is given as 15/26 etc.no explanation given in docs.

on what basis it is calculated.



regards
Plannerguy

[alkesh]

Hello Plannerguy,

Time period is calculated on the basis of normal burst

Normal burst is 156.25 bits = data in one time slot
1 bit duration = 3.69 micro seconds

Time period of one time slot = 156.25 bits x 3.69 micro seconds/bit = 0.577 milli seconds (577 micro seconds)

Hope this helps.

[plannerguy]

Hi alkesh

Thanks for fast reply ............, the explanation is enough., i got it.....

any information on what is 15/26?

which is given in dos.......


Regards
Plannerguy

[alkesh]

I am not too sure about 15/26. will let you know if I find out.

Hi alkesh

Thanks for fast reply ............, the explanation is enough., i got it.....

any information on what is 15/26?

which is given in dos.......


Regards
Plannerguy

[wolverine]

15/26 is the same number expressed as a fraction.

If you perform the division on a calculator you will get 0.577 (at 3 decimal places)

[ghassen]

Hi alkesh

Thanks for fast reply ............, the explanation is enough., i got it.....

any information on what is 15/26?

which is given in dos.......


Regards
Plannerguy

this the clock signal division inside the mobile station we have
bit duration = 48/13000000 = 3.69 e-9 -> each 48 bits of the internal clock which frequency is 13 khz the mobile station will generate a bit in the TDMA frame this clock signal is generated by a quartz and you multiply by 156.25 you ll find your result :
48*156.25 = 7500
7500/13000000 = 75/130000 = 15 * 5 / 130000 = 15 / (0.2 * 13000 ) = 15 / 2600 = 576

[alkesh]

Very true. Missed out on this. Checked on scientific calculator.

Thanks.

15/26 is the same number expressed as a fraction.

If you perform the division on a calculator you will get 0.577 (at 3 decimal places)

[plannerguy]

hi

Hassen Bhai

thanks for the Great answer

i was searching for this answer for past one year........

again thanks for the solution.


Regards
Plannerguy

[kahnoie]

GSM channel = 8TS =4.615 ms frame duration
Hence 1 TS = 577 µ-s = 156.25 bits

Regards,
Amit
agarwalamit081@gmail.com

[ghassen]

hi

Hassen Bhai

thanks for the Great answer

i was searching for this answer for past one year........

again thanks for the solution.


Regards
Plannerguy

juste to correct i'm ghassen not hassen thx