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How MME selects HSS? Is it based on DNS or predefined configuration ?

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How MME selects HSS? Is it based on DNS or predefined configuration ?
posted Apr 7, 2017 by Ankit Mishra

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1 Answer

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Best answer

In roaming case when MME of visited network serves UE of different network, It has to fetch UE information from its home network HSS. In these cases only DNS helps to resolve the HSS and MME gets the information from that HSS.

In lab testing, you might have static configuration but in deployment DNS would be preferred choice.

Based on the PLMN of IMSI, MME forms FQDN and resolve the HSS details.

answer Apr 7, 2017 by Harshita
Similar Questions
+2 votes

Generally, MME communicates with the HSS with IMSI value, suppose if a network has multiple HSS database, how MME decide which HSS to select?

+3 votes

For example it can be used in the HSS mnc.ncc.3gppnetwork.org and in the MME mnc.ncc.3gpp.org. Or must be same mnc.ncc.3gppnetwork.org?

+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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