When a MS is performing a SDCCH transfer (call setup, SMS, loc. upd.) and suffering low Rxlev, poor RxQual, or better neighbour, then the BSC will command the MS to perform aHO to a neighbour cell. The MS will resume the SDCCH transfer on a SDCCH subchannel of the target cell.
That’s a SDCCH HO.
in the first cell: outgoing ho
in the target cell : incoming ho
1/ it’s SFH techniques, a kind of frequency hopping based on a wide number of hopping channels.
2/ Radio Link Time out, def value is 18 SACCH (= 0.48s). It’s the time before a drop is detected because no SACCH can be decoded in either direction. (18 SACCH, that’s about 9 seconds)
hi
please tell me about signalling transaction in terms of MSU.
in alcatel gsm switch one sig=4 MSU how?
no of bytes per second supported by i ss7 link 64 Kbps=8000. How?
pl explain it.
gsm key indicator
signalling capacity for roamers international and national
how the roamers are associated with signalling capacity.
please tell me about signalling transaction in terms of MSU.
in alcatel gsm switch one sig=4 MSU how?
no of bytes per second supported by i ss7 link 64 Kbps=8000. How?
pl explain it.
Hi rachit,
as I know, in case of handover attempt there is no need for sdcch, BSC checks if any TCH available on target cell; if yes, HO proceeds, if no, the call will continue on the source cell (ROC – Reversed to Old Channel).
Regards,
Rex