GSUP routing for different kinds of entities

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Neels Hofmeyr nhofmeyr at sysmocom.de
Thu Mar 21 01:36:08 UTC 2019


With the lack of comments, I am implementing and using this, explicitly naming
the entities that are sending and receiving GSUP messages in GSUP IEs.

Still would like to get input on naming:

For SMS, we have the SMSC and ESME entities.

Are there similar terms for USSD?  Which is the entity managing USSD dialogs?
which is the entity sending the USSD messages?

Is it EUSE <-> MSC?

Thinking, in fact if our osmo-msc wasn't siamese twins with the SMSC we would
have ESME <-> SMSC <-> MSC.

And might make sense to explicitly state which MSC subsystem is being
addressed, so rather:

 EMSE <-> SMSC <-> MSC-SMS
 (currently only EMSE <-> SMSC, the final SMSC <-> MSC-SMS step is implemented
 inside current osmo-msc)

 EUSE <-> MSC-USSD

Does that sound about right?
Thanks!

~N

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