BRAS service gateway
The BRAS service gateway is a function of the VAS Experts DPI for authorizing and terminating subscribers. This solution allows the ISP to control the subscriber access to the Internet and apply tariff plans and additional options.
The main object of BRAS is to authorize users and apply tariff plans to them. BRAS generates a request to billing system via Radius protocol depending on the first package from the subscriber and receives a set of services enabled for the user. This functionality is implemented for L3 (IPoE) and L2 (DHCP, PPPoE, ARP) modes.
BRAS as a VAS Experts DPI function gives an opportunity to improve Quality of Service and the way the user perceives it (QoS и QoE). VAS Experts DPI analyzes traffic at levels 2-7 of the OSI model and handles the protocol data units according to rules applied to them. This allows the broadband operator to use traffic balancing within each uplink, each subscriber and for all traffic within the device. Traffic can be marked by the DPI and further passed on for prioritization on the router. The platform itself can control the bandwidth according to the algorithms (HTB, TBF) for each of the 8 traffic classes, which are determined on the basis of signatures (instant messengers, streaming video, social networks, torrent, etc).
PCRF is responsible for interaction with VAS Experts DPI and Radius server within the network scheme. This feature allows the integration with any billing system.
- Proxying requests between BRAS and Radius server
- Dynamic management of policies and services of subscribers by Radius (CoA)
- Synchronize multiple BRAS operations and provide redundancy
- Using separate accounting for AS or protocols.