IP Multimedia Subsystem(IMS)

IMS

IMS system is 100% compliant (3GPP) and SIP-based. The product meets the VoLTE/VoNRservice function of the operator's LTE/5G network and can also cooperate with the dedicated as a multimedia service function under the dedicated network.

Our fully virtualized IMS solution is based on lightweight containers (Docker Swarm, Kubernetes) and runs on any public or private cloud as well as on hardware.

Our IMS solution has been integrated with the hardware and software of all industry suppliers. This provides the highest possible flexibility to integrate with both industry structure and innovative (open-source) applications.

Key Benefits:

• 100% cloud implementation of IMS core deployment
• Deliver seamless, uninterrupted roaming
• Simplify managing interconnect network topology
• Convergence of mobile and fixed access networks
• Support hypervisor and dynamic lightweight Linux Containers
• Carrier Grade Reliability Support for multimedia services

Comply to 3GPP R14 Standard
Application Servers

• IP-SM-GW: Provides SMS services for VoLTE and exciting devices and allows interworking towards other networks based on SMPP
• MMTel/TAS: Provides rich supplementary services, e.g., call forwarding and call barring and acts as a conference-factory for VoLTE handsets
• MRF: Provides network announcements and conferencing. Implemented according to RFC4240 (Basic Media Services in SIP) and set up as combined MRF-controller (MRFC) and -processor (MRFP)
• SR-VCC: Enables seamless early or mid-call handover from 4G/5G to 2G/3G and acts as a media-anchor for voice calls
• LI: Provides X1 to X3 interfaces towards the mediation function
• I-CSCF: Provides full Cx/Dx interface support and selects S-CSCF based on user capabilities and load

Interfaces:

• Rx: Between PCRF and P-CSCF
• ENUM: Between S-CSCF and ENUM-DNS server
• Sh:Between AS and HSS
• ISC: Between AS and CSCFs
• Gm: Between SBC/P-CSCF and UE (via EPC/PGW)
• Cx/Dx: Between CSCF and HSS
• Mg/Mj: Between CSCF and MGCF for PSTN-IMS interconnect
• SNMP: Towards Network Management System
• Ro: Between CSCFs and IN/OCS
• Rf: Between CSCFs and CCF

I/S/P-CSCF, BGCF, SBC, AS NE Functions

• I-CSCF: Provides full Cx/Dx interface support and selects S-CSCF based on user capabilities and load
• S-CSCF: Provides flexible application execution using a standards-based ISC interface and allows optional charging integration with standard Ro/Rf interfaces
• P-CSCF: Provides full transcoding support for AMR/AMR-WB based on a separated RTP worker

Secures the network edge for user access and/or peer network interconnection with topology hiding, Internet Protocol Security encryption (IPSec), Transport Layer Security (TLS), Secure Real-Time Transport Protocol (SRTP) and intrusion protection such as from Distributed Denial of Service (DDoS) attack

Provides SIP signaling control and media anchoring to ensure voice call continuity for calls that traverse LTE and 3G networks

Scale to millions of subscribers per service

Enable the use of HD voice and EVS voice codecs, including transcoding, delivering a better quality of experience (QoE) for end-users compared to over-the-top (OTT) services