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Mobile backhaul transport streamlined through SDN

In this paper, we describe the integration of Software Defined Networking (SDN) in the mobile backhaul as a disruptive approach to streamline the transport network. In this work we leverage SDN to optimize the mobile backhaul transport by removing all mobile specific tunnelling and replace it with more efficient MPLS or Carrier Grade Ethernet deployed either over electrical or optical networks. The paper also presents the testbed with complete end to end system including off the shelf base stations, SDN enabled mobile backhaul switches and virtualize network elements (i.e. Mobility Management Entity (MME), Serving/Packet Gateway (S/P-GW)) running on the cloud. This testbed is currently accepted as European Telecommunication Standards (ETSI) Proof of Concept and the results are used to describe the benefits for operators and end users. Moreover, an initial design of services based on the proposed virtualized mobile network architecture is proposed. The results of the testbed show the benefits for mobile operators in terms of Capital Expenditure (CAPEX) and Operational Expenditure (OPEX) savings but more importantly the development of services that benefit from optimal usage of resources.