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How MME identifies S-GW address?

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I'm beginner to LTE. Please expalin me how will MME knows S-GW address.

posted Sep 23, 2016 by anonymous

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1 Answer

+1 vote

SGW is selected based on the location of UE in the network. Location term here is referred to "current tracking area code".
When MME receives attach request from the UE, it does DNS query based on the received TAC. DNS responds back to the MME with the IP address of the selected SGW.
This is completely dependent on the vendor implementation and the network deployment.
Usually in our lab setup, IP address of SGW is configured in the MME.
Hope my answer will help you out to understand this.

answer Sep 23, 2016 by Harshita
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