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What pros and cons of combined S-GW/P-GW? and why?

+1 vote
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Hi all

I find some information on internet of this question "What pros and cons of combined S-GW/P-GW?".
However it did not write the reasons.

I find this answer in http://www.cisco.com/c/dam/en/us/solutions/service-provider/mobile-internet/whitepaper_c11-577763_v1.pdf

It said that combined S-GW/P-GW have these advantages:
Reduced signaling overhead (S5 and S8 would be internal)
Fewer hops on the bearer path
Less backhaul
Reduced signaling on the S7 interface
Lower session requirement for the PGW

I cannot understand why it can reduce signaling on the S7 interface.
and although I probably know other advantages' reason, I am not sure.
Someone please tell me.

thanks

posted Jan 24, 2017 by Jim Tan

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