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PDN GW address provided by the HSS in S6a-IDR

+1 vote
57 views

PDN connection is already established to a PDN-GW (PDN GW address was resolved by DNS resolution)
The HSS sends to the serving MME, S6a-IDR (Insert Subscriber Data) where the PGW-address (MIP6-Agent-info AVP) set to another IP-address is specified in the APN configuration.
Should the MME immediately tear down the existing PDN connection and re-establish a new connection with the PDN-GW present in the IDR message?

posted May 21 by Michael Semama

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+2 votes

Based on the 3GPP 29.272, the IDR (Insert-Subscriber-data Request message) is generated by the HSS to the MME to update the subscriber profile in the MME and/or requesting subscriber info such as location-information, subscriber state...
However the SUBSCRIPTION-DATA AVP containing the of profile to be added or updated is defined as Mandatory.
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Should ot be present without any nested AVP under it?

+6 votes

It's just a general question, popped up when i was reading a document. For instance Suppose an APN configuration of an message say Update Location Request (ULR) is not present in HSS and MME has sent the message which has reached there in HSS. What will be the reaction of HSS?

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In what all scenarios, this procedure gets executed ? And why this procedure need to be executed ?

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