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Reply To: High SDCCH Traffic in LA Borders

#44257
pix
Guest

hello montalli,

i’m glad to give you new perspectives, but be careful because in your post there are *a lot* of misunderstandings !

let’s be clear:
cause –> consequence

PCH congestion –> paging retransmission

SDCCH congestion –> no paging retransmission, but call establishment failure (the subscriber has to dial again !)

TCH congestion –> no paging retransmission, but call establishment failure (the subscriber has to dial again)

As you can see, SDCCH and TCH congestions have the same consequences. However, a cell with sdcch congestion does not mean there is no TCH anymore. The congestion of SDCCH and TCH are totally uncorrelated !

It is actually recommended to avoid sdcch congestion more than tch congestion. SDCCH is really important, and there is almost no queuing. Whereas TCH allocation can use a more elaborate queuing system, to avoid congestion.

I hope I was clear… 🙂

Regards,
Pix