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LTE MBMS: Why PGW has interface with BMSC and Content Provider ?

+5 votes
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I found that PGW connects with BMSC and Content provider by using SGi interface.
Can anyone please help me to understand what is the purpose behind having SGi ?

posted Aug 6, 2014 by Ganesh

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Hi as PGW is for packet gateway, so an interface is required between MSC, RNC, SGSN, GGSN to PDN.

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