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| | |-+  route for sms in cdma
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Author Topic: route for sms in cdma  (Read 1555 times)
itsnomihere
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« on: October 11, 2005, 09:53:14 UTC »

hi
wat i know, the route for sms in cdma is
msc->(smsc)mtp->sccp->tcap->IS41->SMPP
after processing which layer of ss7 is responsible to send sms bak to msc
thnx in advance
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parasa
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« Reply #1 on: October 11, 2005, 10:07:42 UTC »

hi
wat i know, the route for sms in cdma is
msc->(smsc)mtp->sccp->tcap->IS41->SMPP
after processing which layer of ss7 is responsible to send sms bak to msc
thnx in advance


You forgot SMSC.

msc->(smsc)mtp->sccp->tcap->IS41->SMSC->SMPP

Then SMSC acknowledge the receipt of message. Even in GSM it works in the same way apart from IS41.


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Thanks & regards,

Parasa kiran
India
itsnomihere
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« Reply #2 on: October 14, 2005, 16:16:41 UTC »

thanx
 but do u mean tath there ll b a gateway/application which will get sms pdu from is41 n then pass it tp smpp n then smpp after processing pdu send it back to gatewy/application which will send them to is41
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parasa
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« Reply #3 on: October 17, 2005, 05:36:38 UTC »

Hi,

Lets take an example.
Say subscriber A sends message to B party. Where B party may be a short code or another mobile no.
Now the message reachs the SMSC node. After passing through various protocol layers message finally reachs IS41 layer, which is turn sends it to SMSC. Now SMSC acknowledges for the MO-FSM recevied. With this subscriber ( A party) gets 'message sent' on his mobile.

Now one leg of delivery is completed, ie acepting the incoming message.

Now SMSC executs the next phase routing, ie terminating the message on to B party.

If B no is a short code then message is passed on to the server application ( may be same or different module) which may be using various protocol for communiction ( SMPP 3.3, 3.4, UCP, CIMD).

If B no is a mobile no ( CDMA )  then SMSC attempts the message delivery towards the CDMA network. A new message is constructed and is sent to the B party via IS41 Stack ( sent in two phases : SRI:FSM) .

If delivery attempt is succthen SMSC constructs a delivery report and sends it to the A party.  This applies to both ( ESME, mobile terminated messages).

The routing described above may differ if the SMSC is also acting as GSM-CDMA gateway.

Regards,
Parasa Kiran

 


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Parasa kiran
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itsnomihere
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« Reply #4 on: October 17, 2005, 13:06:23 UTC »

hi
thanx very much.bcause of u things are clearin up
what now i understand is
 if sms is b/w cdma to cdma
is41 will deal with it
if sms is b/w cdma to short code
smpp will deal with it
if sms is between cdma to land line
may be isup will deal with it
if sms is b/w cdma to gsm
still dont know

and all this is41 , isup or smpp client run on smsc

one more thing where i can get the technical details
of sms in cdma as development point of view.how it works.ne book ne document will help me alot.as i still sont know about MO-FSM or SRI,FSM.pls refer ne document regarding is41 details


thanx so much
nauman
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parasa
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« Reply #5 on: October 17, 2005, 14:01:20 UTC »

Hi,

SMSC is an entity that routs msgs to mobile and application.

It receives msgs from
1.  Application ( via server [CIMD, SMPP, UCP])
2.  Network  ( Via CDMA [is41] or GSM [MAP] stack).

Now it terminates msgs
1.  Application ( via server [CIMD, SMPP, UCP])
2.  Network  ( Via CDMA [is41] or GSM [MAP] stack).

considering CDMA network ( is41) and server supporting smpp.

1. MO-AT ( mobile orginated - app teminated)
     CDMA mobile->is41 stack -> SMSC (via smpp) -> ESME.
2. MO-MT ( mobile org - mob term )
     CDMA mobile->is41 stack->SMSC -> is41 stack -> destination mob.
3.  AO-MT ( app orig - mob term).
     ESME ->  SMSC -> IS41 -> destination mob.
4.  AO-AT ( app orig - app term ).
     EMSE -> SMSC -> ESME.

IS41 documents are not available for free on net. 

To know more about SMSC serach the forum. You will get many posts.

Regards,
Parasa Kiran


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Parasa kiran
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itsnomihere
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« Reply #6 on: October 18, 2005, 06:10:24 UTC »

thanx
i have very clear view of picture now
lastly,is it rite that sms can also travel from cdma <---> tdma
and isup will be used thn
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parasa
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« Reply #7 on: October 18, 2005, 06:52:01 UTC »

Isup is used for call setup.
You should differeniate calls from SMS..
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Parasa kiran
India
parasa
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« Reply #8 on: October 18, 2005, 11:35:46 UTC »

Hi,

I think the portion where in SMSC is interacting with MSC looks bit confusing.

I suggest you to disable the picture as it may confuse others. 

Check other posts to know more about interaction between SMSC and the network during message termination and msg origination.



Regards,
Parasa Kiran
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Thanks & regards,

Parasa kiran
India
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