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IMS Media Gateway

Located in all-IP-based 3G mobile networks or fixed/wireless service providers' IMS networks, this media gateway provides media conversion between heterogeneous networks, serving as a key component of next-generation mobile and IMS networks. SMEC's IMS Media Gateway enables interworking with PSTN, 2G/3G mobile networks, and VoIP networks within IMS environments, while also providing interworking with 3G RAN, PSTN, and IMS networks in all-IP-based 3G core networks. IMG-24K supports the MEGACO (3GPP Mn, Mc) protocol for interworking with the MGC (Media Gateway Control) in IMS networks and the MSC server in 3G core networks.

Applications
  • IMS media gateway
    • Voice bearer transmission using Mb (AMR/RFC3267)
    • Interfacing with the MGC via the Mn interface (MEGACO)
    • Interworking between IMS and PSTN, 3G mobile core networks, and VoIP networks
    • IMS-3G video call interworking
  • 3G lu/CS media gateway
    • Interfacing with ATM or IP-based Radio Access Networks (RANs)
    • 2G BSC interfacing via the A interface (TDM)
    • MSC server interfacing via the Mc interface (MEGACO)
    • Interworking between 3G and PSTN/IMS networks
Various media interfacing functions

Interfacing with IMS, PSTN, 3G, and VoIP networks

Customization

Flexible customization enabled by in-house development of integration protocols

Enhanced Media Functions

Conference calls, recording/announcement, tone/DTMF

Key Features & Advantages
  • Various media interfacing functions
    • Interfacing between IMS and PSTN
    • Interfacing between IMS and 3G mobile core networks
    • Interfacing between IMS and other VoIP networks
  • Open, standard interfaces
    • 3G mobile core networks: lu-CS (ATM/IP), Nb (ATM/IP), Mc
    • IMS : Mb(RFC3267), Mn, 3G-324M
    • ATM(AAL1, AAL2, AAL5), TDM (E1/T1, STM-0, STM-1), IPv4, IPv6
    • ATM to ATM TrFO, ATM to IP TrFO, IP to IP TrFO
  • Various call scenarios
    • lu-MGW : lu(ATM/IP)-Nb(ATM/IP), lu(ATM/IP)-IMS, lu(ATM/IP)-PSTN
    • CS-MGW: Nb-lu(ATM/IP), Nb(ATM/IP)-IMS, Nb(ATM/IP)-PSTN
    • IMS-MGW : IMS-PSTN, IMS-lu/Nb(ATM-IP), IMS-VolP
  • Flexible capacity expansion through module addition (up to 24K TrFO channel capacity)
  • Complete redundancy for high reliability
  • Active/standby or N+1 redundancy
  • Various voice codecs (wired/wireless voice codecs, H.263, MPEG-4, H.264 video codecs)
  • SNMP protocol provided for NMS integration
  • Centralized operation via EMS/GUI for enhanced convenience
  • Flexible customization enabled by in-house development of integration protocols
  • Enhanced Media Functions
    • Conference calls, recording/announcement, tone/DTMF
Network Diagram
IMS MEDIA GATEWAY Network Configuration Diagram