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Can two or more SGW be connected with each other in LTE-EPC

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Is it possible to establish link between 2 or more Serving Gate Way (S-GW) directly in LTE system? --OR-- SGWs are connected through Packet Data network gate ways (PDN-GW)

posted Sep 26, 2016 by anonymous

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1 Answer

+2 votes

There is no interface between SGWs. All the signalling within the LTE network is controlled by MME. During the attach procedure, SGW and PGW selection is done by MME. As part UE mobility, in some scenarios SGW gets changed for an UE and this time again MME takes decision to select appropriate SGW. In case of SGW relocation, MME initiates handover signalling towards the selected SGW. Old SGW and the new SGW does not talk to each other directly.

answer Sep 27, 2016 by Vimal Kumar Mishra
Similar Questions
0 votes

Instead of connection between SGSN and SGW why can't we have SGW with GGSN?

+5 votes

Why we need SGW and PGW separately?
If it is for roaming then how it will be used at roaming condition?

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