Convert kb to Erlang ?

[dekili]

Bit Rates = 64 kbps
TTI per frame = 20 msec = 0.02 sec ( follow link : http://en.wikipedia.org/wiki/Transmission_Time_Interval )
Duration of busy hour = 1 hour = 3600 sec
Data erlang = (total number of frames transmitted * TTI per frame)/Duration of busy hour

1 Erl = (X * 0.02)/3600
X = total number of frames transmitted = 3600/0.02 = 180,000 frames

Y = total number of kbps transmitted = 180,000 * 64 kbps = 11.52Mbps
You can mutiply Y with GOS ( Grade of service ) = 0.02 or 0.01 to get Total Real transmitted = Y + Y*0.01

Actually, GoS is related to number of circuits and Erlang table so you can't multiply throughput with blockage percentage. You need to multiply Erlang traffic. Nevertheless, if there is no information, this could do the job because it is more pessimistic than Erlang table.

dekili

[dekili]

You can't recover proper information if you have only a single number which is total throughput. For voice, you need to know BHCA attempts (e.g. 1.5 calls per user per busy hour) and call length (e.g. 90 seconds). Than you can find number of Erlangs with GoS of 2% and that number of Erlangs (lines) could be converted to throughput based on used vocoder (e.g.12.2kb/s). For video and Internet you need BHSA and average duration. Average throughput per UMTS user is not high (comparing to maximum data rates) and it depends on a country but you can think about 4-6kb/s per user on average. Of course, it works when you have very large networks (this statistics) but not always for small ones.

Better tell us what you can get regarding data or if you are able to ask someone to give it to you. Then we could advise you what to do. If you only have a single number that is total throughput for all services, you can't do anything with it without knowing user behavior (profile).

dekili

[soo55]

Thanks dekili for your clarification; unfortunately I don't have these details, I'll check if I can get it from someone in the company.

BR.
soo

You can't recover proper information if you have only a single number which is total throughput. For voice, you need to know BHCA attempts (e.g. 1.5 calls per user per busy hour) and call length (e.g. 90 seconds). Than you can find number of Erlangs with GoS of 2% and that number of Erlangs (lines) could be converted to throughput based on used vocoder (e.g.12.2kb/s). For video and Internet you need BHSA and average duration. Average throughput per UMTS user is not high (comparing to maximum data rates) and it depends on a country but you can think about 4-6kb/s per user on average. Of course, it works when you have very large networks (this statistics) but not always for small ones.

Better tell us what you can get regarding data or if you are able to ask someone to give it to you. Then we could advise you what to do. If you only have a single number that is total throughput for all services, you can't do anything with it without knowing user behavior (profile).

dekili