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Why in 4G the EPC session is considered as "always on", what does it mean and how is it different with 2G & 3G?

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Why in 4G the EPC session is considered as "always on", what does it mean and how is it different with 2G & 3G?
posted May 26, 2017 by Hana Pamora

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1 Answer

+1 vote

Though I don't know how 2G and 3G technology work but in LTE "always-on" means an IP addressed is allocated to the UE and it keeps that IP until it gets detached from the network. Even if there is no data flow for UE, it still retains the allocated IP address as well as PGW retains UE's IP address.

answer May 27, 2017 by Harshita
Thanks !
Following the answer, what happen if the UE is disconnected from the network gateway/PGW (no detach) then create session on the other PGW ?
commented May 28, 2017 by Hana Pamora
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