RCS & SIP services over 3G
Mobile service providers can exploit the fast bandwidth in 3G RANs to offer new, SIP-based interactive communications, including:
- Instant messaging (IM)
- Presence
- Multimedia sharing
- Video chat and video share
- VoIP
One such initiative is the GSMA Rich Communication Suite (RCS) and RCS-e, a program focused on the delivery of IMS-based services over 3G that complements today’s circuit-switched voice services. These services are aimed at increasing ARPU and competitive viability. The Acme Packet RCS and SIP services over 3G solution features the Net-Net Session Director (SD) deployed at the access border of the SIP/IMS service network. The Net-Net SD provides the Proxy-Call Session Control Function (P-CSCF) and IMS-Access Gateway (AGW) functions. These new interactive communication services require the same security and control functions as packet voice, and Acme Packet enhanced the Net-Net session border controllers (SBCs) for RCS service delivery, including MSRP support, DoS protection and overload control for IM/presence traffic and presence signaling scalability. Since RCS services are designed to cross service providers boundaries, Acme Packet SBCs provide a SIP interconnect solution used to securely tie together and connect the greater RCS community. For RCS release 2 services, the Acme Packet Net-Net Security Gateway (SG) provides authentication and IPsec termination for fixed broadband RCS clients for fixed mobile convergence. 
The Acme Packet edgeNet-Net SBC provides critical control functions to deliver high-quality interactive communications—voice, video and multimedia sessions—over the 3G broadband networks. Net-Net Session Directors satisfy all RCS and RCS-e signaling and media control requirements across five major areas—security, service reach maximization, SLA assurance, cost and revenue management, and regulatory compliance, and provide mobile service providers with the following benefits: - Lower total cost of ownership with consolidated IMS access functions
- Comprehensive security, including DoS attack prevention and Method rate limiting
- Extensive interoperability, including SIP header manipulation and MSRP support and interworking
- Dynamic and granular routing control with SIP Method-based routing
- Regulatory compliance for lawful intercept (RCS 2.0 Packet Voice and IM) and emergency call routing (voice)
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