Central Router

Full-mesh network architectures are no longer realistic in the massive growth environment now being experienced in 3G/4G networks and simplifying operational management is essential for controlling cost.

Central control of routing and congestion management is critical for profitability and network reliability.  Topology hiding and dynamic reconfiguration of resources are important for both operational and security purposes.  The DSC allows network operators to grow their core network incrementally to support increasing service and traffic demands.

Challenges

MNOs are faced with the challenge of how to manage congestion and distribute workload in a scalable, resilient, and cost effective manner.  The lack of a common core signaling infrastructure will present a number of challenges, some of which are already known from the 2G and 3G networks today.

n2  Interconnect – In a fully meshed network the interconnections are growing to the power of n2. All nodes in the network must be re-provisioned and tested every time a new node is introduced or a function is transferred from one node to another. The resulting network is very costly to maintain, prone to error, and almost impossible to scale.

Service Resiliency – When all Diameter nodes are mesh interconnected, a single server that becomes congested or fails can result in propagation of errors and cascading failures across the network.

Service Scalability – As servers are added to handle the increased Diameter signaling traffic, each Diameter node must maintain additional Diameter interconnections. Instead of being an isolated action to increase service capacity, upgrades require wide-spread updating and retesting of the network.

Interoperability – The number of vendors entering the Diameter signaling market is increasing and despite Diameter being a standard, the interpretation of the standard varies. This means every time a new vendor enters the market, an extensive amount of interoperability tests are required to minimize the incompatibilities and limit Diameter session failures.

DSC Solution

MNOs are quickly realizing that their core networks are not equipped to handle the massive growth in Diameter signaling.

Using the DSC, the resulting network architecture reduces the cost and complexity of the Evolved Diameter Signaling Network and allows Mobile Network Operators to incrementally grow their network to support the increasing service and traffic demands.

The DSC supports advanced rule-based routing, content-based routing (using content from any combination of AVPs), and load balancing routing options that optimize the performance of peer groups supplying services to the network.

Management is vested in a graphical interface and underlying NetConf and SNMP functionality.

A DSC Central Router enables:

  •     Signaling Network Scalability
  •     Operational Simplification
  •     Multivendor Interoperability
  •     Operational Security & Reliability