Use-Case: Mediation in LTE network

A Billing Mediation Use Case

Mediation plays core role in new LTE network launch


As part of one of the world’s largest 4G deployments the customer – based in the sub-continent – selected a new online charging system from a DigitalRoute partner, with the online mediation functionality provided by MediationZone and DigitalRoute.

The Use Case involved launching a completely new 4G network that would deliver innovative services to end-users. The customer thus required a highly flexible BSS layer which would be able to grow and cope with various aspects of its anticipated business transformation driven by the 4G rollout. It selected MediationZone as a horizontal mediation layer, brokering the real-time messages to the downstream Convergent Charging system. Services initially implemented included VoLTE (IMS), LTE data, Instant Messaging (IMS), FTTH and WI-FI Hotspots along with end customer refill capabilities.

The MediationZone Solution

For Data, Voice and Instant Messaging over LTE, the Mediation module routes diameter requests (Gy/Ro) from the network and translates them into Convergent Charging requests, before sending back the answers to the calling network nodes.

For Wi-Fi hotspots and Fiber-To-The-Home (FTTH), the same principle applies but using the Radius protocol. The interface to the Convergent Charging system is done via a customer specific agent that was built by DigitalRoute, to load data into a High performing database. The agent is available for other partner projects using the same database interface off-the-shelf. Refills are handled via a web service request, using a MediationZone web services agent.

The MediationZone layer is also used in a Refill mechanism as well as implementing the Spending Limit interface, Sy, with the PCRF. In terms of estimated traffic load on the system, ~800.000TPS real-time events is forecasted at go live. The solution is capable of scaling horizontally, supporting more than 100 million subscribers at a given time. The system is also scaled out vertically from a geo redundant and regional perspective. DigitalRoute is taking a front seat position in the project making sure the customer is on time going live with 4G.

Pre Process Road Tolling Related Events

The Result

By having MediationZone as part of the Online Charging System solution, our customer will be able to gain long-term operational effectiveness, as it is easy to add and modify additional and existing services and NE’s into MediationZone. MediationZone is already providing support for most industry-used protocols and interfaces out-of-the-box, which our customer will be able to gain from while adding new functionality. By having MediationZone in place as a strategic platform, our customer will be able to scale horizontally in line with its own customer growth.