Clavister I-WLAN/TTG Blade
The Clavister I-WLAN/TTG Blade is the most scalable, high-performing, 3GPP compliant Tunnel Terminating Gateway (TTG) on the market.
With capacity seamlessly scaling from 200,000 concurrent subscribers up to 2,8 million concurrent subscribers, telecom operators can offload data traffic from their radio-based networks over open WiFi networks to reduce churn and congestions.
By launching I-WLAN services in existing 3G networks, operators can increase their customer satisfaction and efficiently reduce costs for data traffic while transitioning towards LTE/4G. Thanks to the Clavister I-WLAN/TTG Blade, operators can make the migration from closed radio-based networks to a mixed network with public Internet access securely and without introducing any bottlenecks. As traffic from each subscriber will be authenticated and encrypted by the Clavister I-WLAN/TTG Blade, the risk for security and privacy breaches is eliminated.
Clavister I-WLAN/TTG Blade and I-WLAN – an overview
An Interworking Wireless Access Network (I-WLAN) is a wireless data access solution that allows data traffic to flow between WLANs and the operators 3GPP systems. Mobile clients, such as laptops, smartphone and iPads use the WLAN to access the Internet. Clavister I-WLAN/TTG Blade can allow these clients to access the Internet by providing interworking to an existing GPRS backbone.
This enables operators to use all the backbone’s existing facilities, including charging for data traffic using normal mobile phone billing.
The Clavister I-WLAN/TTG Blade provides interworking through support for IPsec VPN tunneling using IKEv2 on the client side and the GPRS Tunneling Protocol (GTP) on the GPRS backbone side. GTP is a protocol used between the GPRS Service Support Nodes (GSSN) within a GPRS backbone network.
The support for GTP means that the Clavister I-WLAN/TTG Blade behaves as a Serving GPRS Support Node (SGSN) in a GPRS backbone network, communicating with a Gateway GPRS Support Node (GGSN) using GTP. At the same time it can act as a Tunnel Terminating Gateway (TTG) for clients in a Wireless Access Network (WAN), allowing traffic to flow between the GPRS Backbone and the WAN. This makes the Clavister I-WLAN/TTG Blade easy to integrate into most 3GPP-compliant I-WLAN infrastructures.
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Rapid Return On Investment with high capacity
Each Clavister I-WLAN/TTG Blade provides a capacity of 200,000 I-WLAN subscribers and scales linearly and seamlessly up to 2,8 million subscribers when used in a distributed and parallel processing Clavister Security System 6016 chassis.
Thanks to the high capacity of subscribers that can be managed in a Clavister I-WLAN/TTG solution, operators can drastically reduce the cost of operation by completely eliminating scalability and performance issues for securing the I-WLAN network nodes.
- Minimizing risk by protecting the core network
Offloading data traffic from subscribers over an open network, such as the Internet, means that operators are exposing their core network to attacks from the Internet. The Clavister I-WLAN/TTG has best-of-class firewall and network protection built-in which help operators protect their core network against network security risks.
- Protecting the subscribers privacy
When offloading data traffic from the semi-closed radio-based network over to the open Internet, subscribers rely on their operators to make sure that traffic is secured at all times. The Clavister I-WLAN/TTG solution ensure that all subscribers are authenticated in the operators network using strong authentication methods, such as EAP-AKA/SIM. To reduce risk for data leakage and avoid confidentiality issues, all traffic between the subscriber and the operator over the public Internet is protected using IPsec VPN with strong encryption algorithms. Subscribers are thereby ensured that their privacy is not compromised.
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