- This topic has 16 replies, 1 voice, and was last updated 12 years, 11 months ago by pix.
8th January 2008 at 07:36 #50357RackGuest
Can you tell us the benefit of Inter-cell HO Hys. parameter & with which parameter have to change with the condition please?
Thanks8th January 2008 at 10:12 #50358pixGuest
Intercell HO Hys. parameter ? what is it ?
Is it the Hysteresis ? Are you talking about the HO MARGIN (from cause “better cell handover”) ?5th March 2008 at 10:38 #50359amkamGuest
inter-cell HO Hysteresis :
has a defualt value : 4 for urban areas
and value of 8 : in suburban or rural areas
we use this hysteresis to avoid the ping pong handover when we dealing with no server dominant in a giving area .6th March 2008 at 08:38 #50360speedyGuest
hi pix !
Can you tell us the benefit of Inter-cell HO Hys. parameter & with which parameter have to change with the condition please
regards,6th March 2008 at 09:01 #50361AbdelGuest
Inter cell HO hystersis is a parameter which tries to make less handovers between cells with different Location areas to avoid to many signalling and location updates.6th March 2008 at 09:37 #50362pixGuest
i’m confused about this parameter, i don’t know its exact definition.
Is it about Better cell Handover between two cells that belong to different LACs or between cells ?
This is anyway a very simple parameter, isn’t it ? Try different settings, and do a drive test, you’ll certainly find the best value by yourself ?6th March 2008 at 09:38 #50363BilalGuest
You are mixing up HO_Hysteresis with “Cell Reselect Hysteresis”.
HO Hysteresis is applied to every neighbor relation regardless of their LA and it is used in dedicated mode. Cell Reselect Hysteresis is used in idle mode re-selection only when the target and source belong to different LAs10th March 2008 at 06:46 #50364samGuest
i had read that HO margin is being mixed up with HO hys, but this is not so. HO margin is basically the difference in values of serving and neighbour cell after which HO takes place. HO hys is basically the area where the serving and neighbour has approximately same values, and HO generally takes place beyond this area.10th March 2008 at 10:11 #50365pixGuest
your definition of ho hyst is not very clear. “ho hyst is an area…” ?
if HO Hyst is a parameter, and if it coexists with HO margin, then it must have a proper definition that differentiates it.10th March 2008 at 12:02 #50366samGuest
i mean to say that HO hys is a parameter which defines an area.
now i think its clear whats HO margin and whats HO hys10th March 2008 at 12:38 #50367pixGuest
it’s still not clear to me at all.. can you give me a typical value for ho hyst ?
ho hyst = 1 square kilometer ?
if ho hyst is an area, the unit must be in square kilometers.11th March 2008 at 08:17 #50368samGuest
i said its a parameter which defines an area….
it has a step size of 2, by which you can increase or decrease its value.11th March 2008 at 08:33 #50369BilalGuest
HO hysteresis is the value by which a neighbor cell’s Signal Strenght must exceed the serving cell’s Signal strength to make a handover. It does create a Hysteresis corridor around the nominal cell border to avoid the ping pong handovers.11th March 2008 at 09:45 #50370PixGuest
so that’s like the HO Margin, isn’t it ?11th March 2008 at 10:29 #50371BilalGuest
Haven’t seen HO margin in Ericsson. Has it got the same function as Hysteresis?