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LTE: How does VoLTE work and what all signalling messages have been defined for this feature ?

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LTE: How does VoLTE work and what all signalling messages have been defined for this feature ?
posted Jun 17, 2016 by Harshita

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+4 votes

Sometimes due to coverage hole issue in the LTE network, the ongoing VoLTE is continued to UE by using the CS network like GSM network. This is known as SRVCC (Single Radio Voice Call continuity). What messages are exchanged between network nodes when UE moves from LTE to GSM ?

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There are two scenarios of VoLTE call.
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