Abstract
In the context of the fifth generation of mobile technology (5G), multiple technologies will converge into a unified end-to-end system. For this purpose, software defined networking (SDN) is proposed, as the control paradigm will integrate all network segments and heterogeneous optical and wireless network technologies together with massive storage and computing infrastructures. The control orchestration protocol is presented as a unified transport application programming interface solution for joint cloud/network orchestration, allowing interworking of heterogeneous control planes to provide provisioning and recovery of quality of service (QoS)-aware end-to-end services. End-to-end QoS is guaranteed by provisioning and restoration schemes, which are proposed for optical circuit/packet switching restoration by means of signal monitoring and adaptive modulation and adaptive route control, respectively. The proposed solution is experimentally demonstrated in an international multi-partner test bed, which consists of a multi-domain transport network comprising optical circuit switching and optical packet switching domains controlled by SDN/OpenFlow and Generalized Multiprotocol Label Switching (GMPLS) control planes and a distributed cloud infrastructure. The results show the dynamic provisioning of IT and network resources and recovery capabilities of the architecture.
Highlights
S oftware Defined Networking (SDN) is consolidated as the most promising candidate to fulfill the stringent control requirements of the upcoming fifth generation of mobile technology (5G)
The Control Orchestration Protocol (COP) has been designed for the E2E service provisioning across multidomain, multi-layer and multi-technology network scenarios, to this aim, the modeled objects and operations are not coupled to a specific network technology but they abstract a set of common control functions applicable to different networks .The COP information model is described in YANG modeling language, with RESTconf as transport protocol using JSON encoding for data transmission
The COP has been integrated as a northbound interface of the multi-domain SDN Orchestrator (MSO) enabling the SDN IT and network orchestrator (SINO) to request E2E connectivity services between the endpoints defined in the abstracted multi-domain topology
Summary
Years, each one with its own proprietary northbound interfaces (NBIs), increasing complexity to design upper control applications which are forced to implement a different protocol library for each SDN controller implementation. The COP has been designed for the E2E service provisioning across multidomain, multi-layer and multi-technology network scenarios, to this aim, the modeled objects and operations are not coupled to a specific network technology but they abstract a set of common control functions applicable to different networks .The COP information model is described in YANG modeling language, with RESTconf as transport protocol using JSON encoding for data transmission. These operations are modeled as Remote Procedure Calls (RPCs) in the YANG definition and they are included into the operations subset of the RESTCONF API. The COP has been integrated as a northbound interface of the MSO enabling the SDN IT and network orchestrator (SINO) to request E2E connectivity services between the endpoints defined in the abstracted multi-domain topology. The SINO subscribes the MSO’s updateServiceCall notification service to keep up-to-date information about its requested network services
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