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LTE: How an UE comes to know its network supports configured APN ?

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Assume I configured XYZ as APN but trying to attach to network. How APN validation work here. Is it bi-directional or uni-directional validation ? Please explain in detail.

posted Jun 2, 2017 by Neeraj Mishra

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2 Answers

0 votes

Hi,

as per my knowledge it is implementation specific , UE will send selected APN in attach request, but MME can validate and select the default APN if invalid APN included in UE's IE. But there is no bi-directional validation process in LTE.

answer Jun 2, 2017 by Jaganathan
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When UE sends Attach/PDN request with configured APN, MME then gets info from HSS about configured APNs for that IMSI. If APN is present in HSS profile then Attach is accepted and if APN is not present then you wii see PDN/Attach reject with cause

answer Jun 10, 2017 by Alkesh Mehta
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