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Thread: Lte csfb

  1. #6
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    Hi hoagal. Not sure about networks, but I know the iPhone 5 and most android phones support SMS over the IMS.


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  3. #7
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    SMS doesnt require CSFB.SMS is sent via NAS siganlling in LTE.


  4. #8
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    In LTE the SMS can be over the SGs interface for UEs that support CSFB. UE doesnt fallback to 2G/3G to send or receive SMS.
    For UEs that are capable of IP SMS the SMS service can be configured over IP-SM-GW. IP-SM-GW is basically a IMS application server which supports SMS service.


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  6. #9
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    Quote Originally Posted by phnthnhnm View Post
    LTE CSFB
    The CS FallBack (CSFB) in EPS enables the provisioning of voice and other CS-domain services (e.g. CS UDI video, LCS, USSD) by reuse of CS infrastructure when the UE is served by E-UTRAN. A CSFB enabled terminal, connected to E-UTRAN may use GERAN or UTRAN to connect to the CS-domain. This function is only available in case E-UTRAN coverage is overlapping with either GERAN coverage or UTRAN coverage.
    The MO SMS and MT SMS are signalled over SGs and do not cause any CS Fallback to GERAN/UTRAN RATs, and consequently does not require any overlapped GERAN/UTRAN coverage.

    useful share. Looking for this kind of thing recently. Hope this may help. Anyway, thanks a lot for this knowledge sharing.




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