top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

Facebook Login
Site Registration
Print Preview

What is meant by CSFB in LTE paging?can any one Explain attached and dettached procedures for CSFB?

+1 vote
140 views
posted Jul 17, 2013 by Giri Prasad

Share this question
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

1 Answer

+3 votes

Lte is a packet only network and handles packet only data traffic. But if UE is registered on LTE and service user make a CS call (circuit switched or voice call) or UE has to receive an MT CS call (mobile terminating call or incoming CS call) from the existing CS domain through EPC.

There are few options (VoIP, IMS, CSFB etc) to handle the CS call (Mobile Originating & Mobile Terminating) in LTE and one of them is CS fall back which uses existing technologies which support CS traffic like GSM, WCDMA to make voice call happen. CSFB makes UE to move to the CS supported RATs using redirect or handover and perform the CS call.

In-order to perform CSFB, UE should support multiple radio access (Lte & Utran or Geran) and EPC should support CSFB. When I say EPC should support CSFB, it means co-ordination should be there at the network end between Lte and other CS enabled RAT (Utran or Geran). It's not very simple to make these two RATs with different protocol stack, work together !! specially at the network end.

For more detail please please see the following link http://wirelessscan.blogspot.in/2013/02/CSFBL2W.html (explains only attach part)

answer Jul 17, 2013 by Salil Agrawal

Useful Links with Similar Problem
Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#470/147, 3rd Floor, 5th Main,
HSR Layout Sector 7,
Bangalore - 560102,
Karnataka INDIA.
QUERY HOME
...