OpenEPC supports the integration with GPRS/EDGE GERAN including:
  • SGSN implementation for:
    • Gb-over-IP with SNDCP, LLC, BSSGP, NS
    • S4 with GTPv2-C/GTP-U
    • S6d with Diameter
    • GMM/SM/SMS with GSM-L3
  • SGW support for S4 with GTPv2-C/GTP-U towards access network
  • Upcoming SGW support for Gn/Gp with GTPv1-C/GTP-U towards legacy access networks
  • Upcoming legacy support for MAP/TCAP interfacing
  • Integration with 3rd party BSS (BTS+BSC)
  • MSC prototype for:
    • A-over-IP with DTAP/GSM-L3, BSSMAP, BSSAP, SCCP
    • GMM, SMS and CC with GSM-L3
    • SS7-free, direct interfacing with SIP/RTP telephony cores, IMS Centralized Services aligned for single-telephony-core serving 2G/3G and LTE/WiFi, simplifying and partially eliminating SRVCC requirements

The GERAN integration includes functions for:

  • Support for MSC and SGSN controlled attachments and detachmentsprocedures
  • Authentication and authorization
  • Flow Control for Downlink
  • Support for default and dedicated bearer establishment and termination (QoS Signalling)
  • Call Control for CS-Voice, with direct translation to an IMS-ready SIP/RTP interface
  • SMS with direct translation to an IMS-ready SIP interface