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PMIP or GTP protocol

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S5/S8 interface, what are the factors what decide whether PMIP or GTP protocol should be used and why ?

posted Jul 19, 2013 by Salil Agrawal

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1 Answer

+2 votes

Both S5 and S8 can be either PMIP or GTP. Courtesy this link (, this is what I understood.Some operators prefer using PMIP throughout their n/w as it facilitates connecting to non-3gpp accesses, whereas some operators want only GTP as their n/w is evolved from UMTS and they dont want too much hassles in managing different transport protocols(my guess). As a result of which, a user roaming between these two will not be supported home-routed traffic, he will only be local-breakout'ed. Therefore to support both home-routed and local breakout, S/PGWs have dual stacks

answer Jul 19, 2013 by Chandra Javalkar
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