- This topic has 6 replies, 1 voice, and was last updated 10 years, 9 months ago by RE.
2nd March 2007 at 13:22 #46763PavelGuest
Do snyone have expirience with SDCCH handover? I am interested in feasibility. And how it can be tested. Thanks.2nd March 2007 at 19:16 #46764PixGuest
It is quite hard to test SDCCH handover, you’ll mostly have to follow-up the QoS stats… it’s gonna hard to reproduce it during a drive-test.
The only way I can imagine : write a long SMS (n x 160 char) it should give you time to force a HO.
Or naturally cross a HO border.
I always disable the SDCCH ho, because it doesn’t enhance the network in the end…
pix2nd March 2007 at 20:11 #46765TufailGuest
SDCCH HO takes place when using DR/CLS(directed retry(nokia)/cell load sharing(ericsson)).
Here wat happns, the call HOs to other cell due to congestion in the serving cell.
Hope u can work on it.
Tufail2nd March 2007 at 21:09 #46766pixGuest
in alcatel systems, directed retry and sdcch handovers are different. i believe it is the same in other systems .. a sdcch ho goes from a sdcch from cell A to a sdcch from cell B..
whereas a DR is from a sdcch of cell A to a TCH of cell B.3rd March 2007 at 10:39 #46767TufailGuest
I have read in Nokia and Ericsson manual wer thy call it SDCCH HO.
I thank you for your comment, wat you are talking may also be correct but i dont abt it..
Wat excalty SDCCH HO is?
Wat is its significance?
thanks for sharing ur comments.
Tufail5th March 2007 at 23:09 #46768PixGuest
SDCCH HO : it occurs during a SDCCH communication (or SDCCH phase). When the BSC detects a HO (PBGT or EMERGENCY), it triggers a HO to establish a SDCCH on a neighbor cell.
DIRECTED RETRY : the SDCCH phase has ended and the call is in the Queue. If while in the queue, a HO is detected, the TCH ill be establish in a neighbor cell.
FORCED DIRECTED RETRY : While in the queue, if RXLEV “capture” conditions are met on a neighbor cell, the TCH qill be establish on the neighbor cell.19th December 2011 at 04:33 #46769REGuest
Thanks for your ideas.
Does SDCCH Handover any influence or efficacy on SDCCH Drop?