No abstract
Envisioned 5G applications and services, such as Tactile Internet, Industry 4.0 use-cases, remote control of drone swarms, pose serious challenges to the underlying networks and cloud platforms. On the one hand, evolved cloud infrastructures provide the IT basis for future applications. On the other hand, networking is in the middle of a momentous revolution and important changes are mainly driven by Network Function Virtualization (NFV) and Software Defined Networking (SDN). A diverse set of cloud and network resources, controlled by different technologies and owned by cooperating or competing providers, should be coordinated and orchestrated in a novel way in order to enable future applications and fulfill application level requirements. In this paper, we propose a novel cross domain orchestration system which provides wholesale XaaS (Anything as a Service) services over multiple administrative and technology domains. Our goal is threefold. First, we design a novel orchestration system exploiting a powerful information model and propose a versatile embedding algorithm with advanced capabilities as a key enabler. The main features of the architecture include i) efficient and multipurpose service embedding algorithms which can be implemented based on graph models, ii) inherent multidomain support, iii) programmable aggregation of different resources, iv) information hiding together with flexible delegation of certain requirements enabling multi-operator use-cases, and v) support for legacy technologies. Second, we present our proof-of-concept prototype implementing the proposed system. Third, we establish a dedicated test environment spanning across multiple European sites encompassing sandbox environments from both operators and the academia in order to evaluate the operation of the system. Dedicated experiments confirm the feasibility and good scalability of the whole framework.
ocio-economic drivers, progress in information technologies, tumbling switching and computer hardware costs, and availability of open source software solutions, are creating the conditions for a change of paradigm in designing and operating telecommunication networks and service infrastructures. Network function virtualization (NFV) [1] by the European Telecommunications Standards Institute (ETSI), and software defined networking (SDN) [2] by the Open Networking Forum seem to be key technology enablers in the direction of meeting requirements such as cost reductions and new business models. NFV, on the one hand, targets at virtualizing servers and appliances that provide network functions. One of NFVs value propositions is cost optimization with the use of commercial off the shelf hardware to reduce capital expenditure. This, together with increased operational efficiency, is expected to also reduce operational expenditure. Operational efficiency is achieved by the automation of commission, configuration, resource management, etc., for even an order of magnitude higher number of managed elements than before. SDN, on the other hand, targets at breaking the vertical integration of network data and control planes to introduce (logically centralized) control plane programmability for novel networking virtualization (abstraction), simplified network (re)configuration, and policy enforcement.Today, all these promises are not yet realized. A typical example is the device located at the edge of carrier networks.Here fixed network operators require broadband network gateway (BNG) functionality for customer centric processes such as authentication, policing, etc. Technically, those gateways are physical devices hosting special network services, or software combining network control plane and data plane aspects for fulfilling the processes, sometimes even supported by hardware acceleration. Given the fact that the broadband network gateway is operated like an appliance, it is difficult to add and evolve the service offering. For example, adding a parental control function or an intrusion detection system (IDS) for a certain customer is rather cumbersome. Today, this would require the instantiation of a separate IDS application, forwarding enforcement between the network gateway and the intrusion detection, and a policy interface to configure blocking of malicious traffic. Dynamism in changing control parameters such as addresses adds additional management complexity.The NFV framework [3] promises to remedy the problems of flexible service creation by managing and orchestrating softwarized network functions into telecommunication data centers. However, considering the full lifecycle of flexible network services, e.g. fulfillment, assurance, and billing [4], one must look beyond the fulfillment phase and see that flexibility is also ensured during assurance (operation) phase.We investigate how network services can scale up/down or scale in/out to offer real elastic, pay as use services. Our main contribution is the analysis o...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.