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LTE: Can an active CSFB user roam around while voice call? If yes how?

+2 votes
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LTE: Can an active CSFB user roam around while voice call? If yes how?
posted Jul 9, 2015 by anonymous

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+4 votes

If UE doesn't have any PS session and any CSFB call initiated then UE redirected to WCDMA or GSM and after ending CS session UE moved to LTE network by performing Tracking area update.

But in case PS session is on going and CS call have to be initiated then Handover to WCDMA will be performed. But when CS call finished and PS session is also still ongoing then which procedure will be performed to move again LTE Network? If its Handover then how measurement reporting will be done.

+1 vote

Suppose MME is getting CS call notification for MSC then How MME will notify to UE when
1. UE is idle mode. ?
2. UE is in connected mode?

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