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Service Aware Network Modelling and Simulation

Some of the anticipated benefits from transmission work relate to large scale dynamic systems based on services that are not yet real. The only way to understand any benefits in advance of the services becoming real is through simulation. We have designed a simulation that enables a wide range of inputs to be flexibly defined, including the demand model, the network and cost models, the orchestration model and a set of possible routing strategies. In the coming months we will run simulations of multiple independent chat sessions and hopefully identify the conditions under which the Service-Aware Network could provide the greatest commercial benefit.

The two use cases chosen for this model are based on two likely scenarios for global video chat room services. One is based on the idea of video chat room associated with a MOOC (A massive open online course) the other is a gaming concept modelled using published numbers for online Poker.

Cloud infrastructure costs from BT, from Amazon and from a more speculative model involving thousands of nodes are being used.

Modelling and simulation - Results

Whilst model building is progressing well, the model is not complete and no simulations have been completed. As yet we have no results to report.

Modelling and simulation - Exploitation

The results from both the modelling and simulation experiments and from the tests and trials in real networks are being used by BT to understand the potential benefits of a Service Aware Network. The plans have been and the results will be reported into BT’s IP Exchange product line which already offers QoS assurance between islands of IP (so allowing, for example, QoS assured transmission of HD voice signals between end points on different IP networks and possibly in the future HD video).

An ability to understand how costs can be controlled whilst limiting the impact on QoE will inform future service design. In addition a design solution, designed to offer seamless service continuity during a live change in the network topology has become the subject of a patent application. Of course the findings across the board will be published as widely as possible.