The rise of new types of business models with service providers , content providers, and virtual network operators entering in competition with traditional telco operators, is reducing revenue margins, making cost-effective provisioning mechanism a necessity. Costly massive overprovisioning needs thus to be replaced by more intelligent dynamic resources allocation. In addition, it is increasingly recognized that many upcoming 5G applications and services will require assured end-toend quality of service.Operators have thus started to look at Network Function Virtualization and Software Defined Networks as means to address the challenges of cost effective and highly dynamic end-to-end provisioning.In this paper we present a test case of an SDN-driven end-to-end service orchestration using a transport API called Control Orchestration Protocol. Our testbed, interconnecting a core network (within the Telefonica premises in Madrid) and an access network (within the Trinity College of Dublin facilities), demonstrates the possibility to operate sub-second end-to-end capacity reservation, showcasing SDN provisioning across multi-domain networks.

Due to the importance for network operators of dynamically control networks (in contrast to what has been deployed until now), this paper proposes a technical solution based on an SDN architecture. With the introduction of an endto-end (E2E) SDN architecture, it is possible to support an E2E service from access to backbone networks. This paper firstly presents an optimum end-to-end network architecture, which covers both network domains. A transport API is introduced (Control Orchestration Protocol protocol) and it is used for joint network orchestration between network controllers, in order to provide these E2E services. Finally, this paper presents a multipartner demonstration, which involves two different labs, located in Telefonica and Trinity College of Dublin facilities. This demonstration is used to validate this work.