BHCA

[chacho.morales]

How to analize or determ how many BHCA i am using on the RNC

[JongKyu Lee]

The question is too rough. In general the signaling capacity, the BHCA strongly depends on the call traffic models. And also the BHCA per the RNC depends on vendors.

[gprastomo]

Hi you can calculate it via counters for each service :
BHCA stands for Busy hour call attempt, sometimes we need to show as per subscriber = BHCA per subscriber.
Let say you have 2000 CS call on busy hour on your RNC and you have 4000 subs so BHCA per sub will be 0.5.

Then usually it is used to calculate the RNC traffic model and usually each RNC product has its own specific BHCA and other traffic model.

[su2010]

You need to know number of subscriber in a RNC, erlang per subscriber and avg duration of a call. Then use the erlang formula to calculate BHCA.

[chacho.morales]

Ok i have the call model on busy hour, also the subscribers, i have a Bsc6900
Ran12 huawei rnc, my call duration time is 67 seconds and earlang per sub is 0.0693 earlangs? and then can you send me the earlang formula?

[JongKyu Lee]

In general a BHCA is calculated as follows:

BHCA = Erlang * 3600 / Call Holding Time or call duration time [second]

For example, assumed call duration time is 67 seconds and earlang per sub is 0.0693 earlangs.

BHCA = 0.0693 * 3600 / 67 = 3.72 BHCA per subscriber.

[su2010]

Now, if you multiply 3.72 (for ths example) by number of subscribers, you get the total BHCA.