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How UE comes back to LTE network after csfb call?

+1 vote
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How UE comes back to LTE network after csfb call?
posted Apr 6, 2016 by anonymous

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1 Answer

0 votes

As soon as CS call is finished, If UE has to send something in uplink it again connect to LTE if LTE network is available.

answer Apr 6, 2016 by Harshita
Similar Questions
+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?

+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.

0 votes

Assuming one case when UE was in LTE network and data transmission was ongoing. Due to incoming voice call, UE leaves LTE network and moves to legacy network to finish voice call. I want to know what will happen with ongoing data session in LTE network.
Does the LTE network deletes UE context ? Does the LTE network buffers UE data coming in downlink direction ? Or UE establishes voice as well as data session is legacy network and he continues voice and data services (less through due to legacy network speed) in case UE and legacy network both support DTM (Dual transmission mode) ?

+1 vote

What will the first process after csfb call completion cell reselectin or TAU procedure?

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