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Variations for CASE in SELECTs (pros/cons)​

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Variations for CASE in SELECTs (pros/cons)​
posted Jun 30, 2015 by Manikandan J

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I was searching for RRH and BBU related stuff and found a query related to that.
Reference:
http://tech.queryhome.com/145400/what-based-network-architecture-which-cases-operators-prefer

I gone through the content and understood at a very high level. Now I have related but deep queries as following:

How this architecture handle the delay that comes due to gap between RRH and BBU ? Is there any specific hardware/software or combination of both needed to mitigate the delay affect ? And one more related question, is there any one to one mapping with BBU and RRH or it can be in any combination ?

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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

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