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Advantages of Separating SAE gateway in LTE (SGW and PGW distributed)?

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I have been studying 4G LTE architecture past few days. I have to submit a report in college on the advantages of separating SAE gateway i.e. separation of SGW/PGW nodes.

Can anyone please guide me with a detailed answer.

posted Jul 5, 2015 by anonymous

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1 Answer

+1 vote

Telecom network is a Hierarchical network, technically you can have all logical node functionality in a single box i.e. eNodeB. But assume that all eNodeB have big capability then how much will be the cost as eNodeB are many (in millions) and close to the UE. Also the level of connectivity is required to connect them O(n^2) where n is the number of nodes.

So to reduce the cost we break the functionality and move the functionality step by step away from UE in this way we reduce the cost of implementation drastically and ultimately the call rate. And while the designing any telecom system it is one of the prime factor (along with other i.e. backward compatibility, data-rate, cabling etc).

This has been discussed in detail please check http://tech.queryhome.com/22013/why-we-need-sgw-pgw-separately-in-lte

answer Jul 6, 2015 by Salil Agrawal
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