- This topic has 5 replies, 1 voice, and was last updated 11 years, 4 months ago by Angi.
16th July 2010 at 11:41 #63625Karan SinghGuest
Facing Missed call alert in a good coverage area while the MS is idle….
Any suggestions??16th July 2010 at 16:23 #63626SHELDONGuest
What exactly do you mean by missed call alert? I know it’s possible to alert a subscriber of a missed call when paging fails….via a text message. Is that what you mean?
SHELDON16th July 2010 at 17:14 #63627AlexiaGuest
Yes Sheldon, that is the case. An MS is ON but when you call it you hear “It is not reachable”, then that called MS (Which is ON) gets a Missed Call Alert (A service provided by some operator to as sms to their customers informing them who called when their MS were OFF).
Question is Why is that happening??16th July 2010 at 20:27 #63628SHELDONGuest
You will hear “unreachable” when the paging of the MS fails, and the paging can fail even if the MS is on. The paging can fail due to a number of factors, such as congestion on the paging channel.
However, when the paging fails (MS unreachable), a simple VAS application can instruct the SMSC to send a text message to the mobile, notifying it of the missed call. The implementation can be done in one of 2 ways.
1. The SMSC sends the message immediately, and keep trying until it reaches the subscriber( remember that with an SMS, the system can keep trying for a longer time, and for several more times, than a call).
2. The SMSC sends the text message the next time the mobile makes contact with the network (eg, location update, call initiation, etc.)
In conclusion, I’ll say that you will always have a number of these cases…because it’s impossible to ensure a 100% paging success rate.
SHELDON17th July 2010 at 20:37 #63629AlexiaGuest
That sound cool.
Thank you for the info SHELDON19th July 2010 at 05:16 #63630AngiGuest
One major reason for paging failure is when MS is at a location area border doing frequent location updates- changing between different location area(LA)… or reselecting between 2G and 3G.