Adax Solutions for the HSS
(Home Subscriber Server)

Adax Cavium-based products have the processing power to host the combined HLR and AuC functions within the HSS and deliver the security and signaling requirements to specific Diameter interfaces. Adax’ integrated IPsec with SCTP functionality allows developers tightly coupled Diameter services. The Adax QuickPort programming and cross-compile environment makes developers feel at home right away and allows them to port their application from their current host onto the PacketRunner quickly and efficiently.

HSS – Home Subscriber Server

The HSS combines the HLR (Home Location Register) and the AuC (Authentication Center) – two functions already present in pre-IMS 2G/GSM and 3G/UMTS networks. The HLR part of the HSS is in charge of storing and updating, as needed, the database containing all the user subscription information, including:

• User identification and addressing – this corresponds to the IMSI (International Mobile Subscriber Identity) and MSISDN (Mobile Subscriber ISDN Number) or mobile telephone number.
• User profile information – this includes service subscription states and user-subscribed Quality of Service information (such as maximum allowed bit rate or allowed traffic class).

The AuC part of the HSS is in charge of generating security information from user identity keys. This security information is provided to the HLR and further communicated to other entities in the network. Security information is mainly used for:

• Mutual network-terminal authentication.
• Radio path ciphering and integrity protection, to ensure data and signaling transmitted between the network and the terminal is neither eavesdropped nor altered.