The SPS integrates the DRA, DEA, STP, SSR, and SANEX while supporting SS7, SIGTRAN, Diameter, and SIP signaling messages. The SPS features diverse route management and control capabilities, and helps carriers deploy efficient, secure, and intelligent convergent signaling networks, which are visible, predictable, and manageable.
The DEA, integrated in the SPS, functions as a unified entrance of an LTE network. It interworks with other LTE networks or international IPX networks to provide voice and data roaming services for LTE subscribers. This simplifies international Diameter interworking. In addition, the DEA supports topology hiding, which protects carrier networks and ensures network security.
The SPS functions as the DRA to implement Diameter signaling convergence and forwarding on the EPC, PCC, and IMS networks. This simplifies the Diameter signaling network structure and enhances the network robustness and agility. The SPS provides routing capabilities based on host/domain, subscriber, session, or load to meet the diversified requirements of carriers.
The SPS is a flexible system that easily incorporates devices from other suppliers by addressing the interworking problems caused by a multitude of interconnected interfaces and different implementation principles.
The SPS session binding provides imbedded database capabilities and real-time data synchronization. When multiple PCRFs are deployed on a VoLTE network, different service flows of one session are sent to one PCRF, ensuring service control policy consistency and a smooth evolution of VoLTE services.
When functioning as the SLF, the SPS uses mapping data stored in the embedded-in database to route messages to the HSS, OCS, and PCRF. This enables carriers to assign subscriber numbers flexibly and enables subscribers to roam between different networks and different regions without changing numbers.
The STPs on traditional signaling networks are approaching their end-of-life. Carriers are confronted with problems of high maintenance costs, increasing security risks, and delayed responses. The SPS supports STP (MNP) and DRA convergence, a unique solution that supports 2G/3G/4G signaling convergence. This facilitates unified network deployment, decreases CAPEX and OPEX, and ensures a smooth evolution in the future.
The SPS, when functioning as the STP, interworks with the PSTN, PLMN, and NGN networks through SS7 or SIGTRAN to process or forward SS7 signaling messages. This facilitates call control, data access, management and maintenance.
The SSR embedded in the SPS simplifies SIP signaling connections of networks. Due to openness of SIP, the SSR provides easy-to-use SIP adaptation to address differences between devices provided by different suppliers. This simplifies interconnection during site deployment or reconstruction and decreases carrier CAPEX and OPEX.
By the end of June 2015, the Huawei SPS has been successfully deployed on more than 100 networks globally. The SPS has helped carriers quickly deploy LTE roaming services and laid a solid foundation for PSTN/2G/3G/4G signaling convergence, facilitating quick responses to unpredictable requirements and decreasing CAPEX and OPEX.