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Why GUMMEI is included in RRC Connection setup complete message?

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Why GUMMEI is included in RRC Connection setup complete message?
posted Mar 13, 2015 by Gnanendra Reddy

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1 Answer

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Best answer

GUMMEI is used to identify a MME in MME pool. An eNodeB may have connection with multiple MME's. If UE already had connection or registered with a MME in MME pool, then it will send GUMMEI in subsequent RRC connection setup complete message while making RRC connection with eNodeB. When enodeb receives GUMMEI in RRC connection setup complete message, it prepares and forwards "Initial UE message" to relevant MME.

GUMMEI is an optional element in RRC connection setup complete message. It means it may come or not, based on the availability of GUMMEI or some other conditions.

answer Mar 13, 2015 by Vimal Kumar Mishra
During Initial attach GUMMEI will  come?if No How UE will identify MME?
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