WiChorus Smart Internet Breakout Gateway
The exponential growth of mobile broadband data is severely testing operators existing packet core elements such as SGSNs and GGSNs, increasing mobile Internet delivery cost and challenging the flat-rate data service models. Majority of this traffic is either Internet bound or sourced from the Internet. Catering to this exponential growth in mobile Internet traffic using traditional 3G deployment models, using older 3G platforms is resulting in huge CAPEX and OPEX costs while adding very little to the ARPU. Key issues are continued CAPEX spending on older SGSNs & GGSNs, higher Internet distribution cost, congestion on backhaul and congestion on
limited shared capacity of base stations.
The Smart Internet Breakout Gateway (SIB-GW) is based on purpose-built SmartCore platforms to offload the Internet traffic as close to the base stations as possible, thereby reducing the mobile Internet delivery cost. SIB-GW’s remarkably higher performance as compared to 3G platforms, reduce capex spending and eliminates the need to add new SGSNs and GGSNs. Its integrated content management, network optimization and content monetization capabilities reduce the congestion on backhaul and base stations and improve the business model of flat-rate mobile Internet services. The SIB-GW can also enable a hybrid deployment model, in which GGSN functions for the Internet sourced traffic is pushed closer to the edge, in parallel to the centralized GGSN functions for the hosted or corporate traffic. Operator hosted APN traffic is sent to the existing GGSN in the operator mobile packet core.
Fig 1: Smart Internet Breakout Gateway
- 3GPP Release 4,5,6 & 7 compliant
- Internet traffic breakout on the Iu-PS interface
- Support for PCRF controlled traffic breakout
- Internet Traffic breakout for femtocell deployments
- Multiple Primary and Secondary PDP Contexts
- Advanced accounting & billing, based on RADIUS and GTP’
- Extensive flow-based architecture for QoS
- Integrated content management & policy enforcement
- Granular application and service control
- Integrated peer-to-peer traffic management
- Integrated network intelligence and mobile analytics
- Compatible with various backhaul solutions
- Stateful N:1 High Availability
- High transaction capability with low latency
- Available in Multiple Form Factors
The SIB-GW enables numerous deployment modes for breaking out Internet Traffic. It can be used for traffic breakout on the IuPS interface with a direct tunnel between the RNC and the SIB-GW. The SIB-GW also has support for Direct Tunnel and I-HSPA deployments. In the I-HSPA deployments a GTP tunnel is setup between a collapsed eNodeB/ RNC and the SIB-GW. The SIB-GW also supports breakout for the Internet Traffic for femtocell deployments.
Features:
- 3GPP Releases 4, 5, 6 & 7 compliant
- UTRAN Inter-RNC Handovers
- Intelligent Internet Traffic Breakout on Iu-PS interface
- Static and dynamic policies based Internet Breakout Traffic
Interfaces
• Gn interface using GTPv1
• Gx interface using Diameter
• Ga
• Gi
I-WLAN
• Terminates Gn interface from release-7 TTG
• APN restriction for I-WLAN RAT
QoS
• Extensive hierarchical QoS policing and shaping
• Differentiated Service Code Points (DSCP) support
• PCEF
• Release-7 3GPP PCC support
• Secondary PDP Contexts with support for multiple TFTs
Content Management
• Service differentiation based on flexible and extensive policy controls
• Identification and stateful management of popular peer-to-peer applications
• Traffic statistics and accounting based on content, applications and vendor partnerships
• Uplink and Downlink Service Level Gating
• Uplink and Downlink Rate Enforcement
Accounting
• Per subscriber, per APN, per flow accounting statistics
• Time and volume based accounting
• Offline charging with both RADIUS and GTP’
• Online charging for roaming scenarios
• Diameter Credit Control
• CDR Generation
• Enhanced charging
Routing and IP Protocols
• OSPF v2, RIP v2
• IP in IP tunneling, including IPv6/IPv4, IPv6/IPv6, IPv4/IPv6
• GTPv1 user plane
Subscriber Authentication and Security
• RADIUS support for authentication and authorization
• Access Control Lists for filtering
IP Address Assignment
• Locally administered address pool
• Based on subscriber’s IMSI, IMSI-based NAI, APN or domain
• Flexible policies for dynamic address assignment
• DHCPv4 and DHCPv6 server functions
• Interface with DHCP and/or AAA
• Dual Stack Support
3GPP Architecture Features
• Direct tunnel Support, in addition to legacy deployment models
• Path Management
Management & Administration
• CLI
• SNMP v3
• EMS with full configuration, monitoring, alarm management
and performance management [FCAPS]
Platform Support
• 9180 (SC 1400) (14-slot modular carrier-grade platform)
• 9160 (SC 600) (6-slot modular carrier-grade platform)
• 9140 (SC 100): Appliance form factor
WiChorus Gateway GPRS Support Node (GGSN)
