Thursday, May 13, 2010

What is difference between congestion and Blocking?

Congestion = time when all resources are occupied (no free TCH available)
Blocking = rejected (blocked) attempts over all attempts in %.

Also there is different formulas for TCH blocking. For example in subscriber perceived TCH Blocking all successful directed retries to another cell are removed from the nominator.

Answer2:

Blocking dives you the non served calls
congestion gives the time when no resource are available (it is possible that nobody needs them so no blocks)
there is a possiblity to have high blocking and low congestion - this means that you have a peak of the attempts.

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