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Is a normal packet data session established when sending or receiving MMS messages?

April 26, 2017Data Messages MMS normal packet session

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Is a normal packet data session established when sending or receiving MMS messages?

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Yes, a packet data session is established to allow the user to access their home MMSC. It is helpful to view the MMSC simply as an application server. In order to access an application server, a mobile must establish a data session. Note that the data session is always initiated by the mobile. As such, MMS message delivery begins with an MMS notification message sent to the mobile via SMS. Once notified, the mobile initiates a data session and uses WAP, IMAP, or SIP to retrieve the message over the MM1 interface. From the radio network perspective, the data session for MMS transport is no different than any other data session since WAP, IMAP, and SIP signaling and transport all occur above the IP layer.