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Definition of Connectivity and Qoe/Qos Management Mechanisms – Intermediate Report Project: H2020-ICT-2014-2 5G NORMA Project Name: 5G Novel Radio Multiservice adaptive network Architecture (5G NORMA) Deliverable D5.1 Definition of connectivity and QoE/QoS management mechanisms – intermediate report Date of delivery: 30/11/2016 Version: 1.0 Start date of Project: 01/07/2015 Duration: 30 months Document properties: Document Number: H2020-ICT-2014-2 5G NORMA/D5.1 Definition of connectivity and QoE/QoS management Document Title: mechanisms – intermediate report Editor(s): Zarrar Yousaf (NEC) Authors: Marco Gramaglia, Albert Banchs (UC3M); Vincenzo Sciancalepore, Zarrar Yousaf (NEC); Christian Mannweiler, Ling Yu, Bessem Sayadi, Marie-Line Alberi- Morel, Borislava Gajic (NOKIA); Rafael Lopez da Silva(Telefonica); Marcos Rates Crippa (TUKL); Dirk Von Hugo, Paul Arnold (DT); Vasilis Friderikos (KCL); Ignacio Labrador Pavon (ATOS) Contractual Date of Delivery: 30/11/2016 Dissemination level: PU Status: Final Version: 1.0 File Name: 5G NORMA_D5.1_v0.53 Abstract This document describes the current status of the WP5 work, introducing the 6 building blocks supported in 5G NORMA architecture: the Software-Defined Mobile Network Controller (SDM-C), Orchestrator (SDM-O), Coordinator (SDM-X), the Mobility Management module (composed by the scheme selection and design), and the QoE/QoS Mapping, Monitoring and Management module. The functionalities of each block are detailed together with the different mechanisms designed to support network slicing and multi-tenancy, highlighting thus 5G NORMA innovations. The interactions between the different blocks are presented, emphasizing the complementarities of the different tackled technical problems to control and to orchestrate network slicing. Keywords Service aware QoE/QoS control, Software-Defined Mobile Network Controller/Orchestrator/Coordinator, SDM-C applications/interfaces, Controller’s hierarchy, Mobility management, Mobility scheme design, Network slice resources management, QoE aware orchestration, VNF placement, VNF mobility 5G NORMA Deliverable D5.1 Executive Summary To build a flexible and an adaptable mobile network architecture capable of supporting a wide variety of services and their respective requirements, 5G NORMA has introduced a novel paradigm: a network of functions-based architecture. This novel paradigm breaks the design principle followed by current network architectures, which are built around entities rather than functions. Our revolutionary approach builds on new technologies, such as Software-Defined Networking (SDN) and Network Function Virtualization (NFV), in conjunction with novel concepts such as the network slicing and multi-tenancy. The main contribution of this deliverable is to bring these technologies and concepts, which reflect the current trends in mobile networks, into a fully specified and completely defined mobile network architecture. To the best of our knowledge, ours is a pioneering effort in this direction. This document presents the initial design of the architectural concepts of 5G NORMA related to the controllers’ design and specification. Three different controllers are considered in the architecture, namely: the Software Defined Mobile Network Orchestrator (SDM-O), the Software Defined Mobile Network Control (SDM-C), and the Software Defined Mobile Network Coordinator (SDM-X). The key ideas behind these controllers are as follows: • SDM-O interacts via Application Programming Interface (API) with the service and business layer to gather their requirements and translate them into a set of Virtual Network Function (VNFs) and Physical Network Functions (PNFs) to be chained together to implement the service. SDM-O is in charge of defining the optimal placement/location and the optimal set of resources to be allocated to the different VNFs. In addition, SDM-O takes care of the scaling in/out of the different VNFs instances according to triggers that come from both the infrastructure (through its Virtualized Infrastructure Manager) or by the control framework . For each of these challenges, a set of innovative algorithms are proposed and described. • SDM-C applies these same principles of the current Software-Defined Networking (SDN) to wireless functionality beyond routing. Indeed, the benefits of this technology when applied to wireless networks are even more significant than for wired networks, as the control functionality of wireless networks include many additional and more complex functions than just routing. This includes time-critical functions (such as scheduling control and self-organizing networks) and other less time critical (such as Radio Resource Control, power control and handover decision and execution). With SDM-C, all these functions can be implemented more easily by a programmable central control, which provides very important benefits for the flexible operation of the wireless edge network. • SDM-X is responsible for the control of resources and network functions shared among network slices. Indeed, sharing the resources across a set of network slices is highly important for future 5G deployment. Such resources include the spectrum and the infrastructure, among others. Thus, to operate multiple network slices in the same infrastructure efficiently, a common entity named Software Defined Mobile Network Coordinator (SDM-X) is introduced in the architecture. The different interfaces between SDM-C/X/O are also introduced and discussed in this document. In order to simplify the reading of this deliverable, the content has been divided into two distinct parts: (i) the definition of the global architecture, and (ii) the design of the underlying algorithms and protocols. Part I of the deliverable focuses on the definition of the global architecture. This includes the specification of the different modules and their interfaces, including the three controllers mentioned above as well as the various functions involved, including the control of inter and intra network slice resources, the Quality of Experience (QoE) aware-functionality, building on the Quality of Service (QoS) monitoring and modelling component, the network orchestration Dissemination level: Public Page 3 / 189 5G NORMA Deliverable D5.1 component as well as the mobility-related functions. Throughout this part, we describe the consistency of the presented functions with the overall 5G NORMA architecture and detail the first steps towards the definition of the interfaces among the controller and the other elements of the architecture. In the interest of conciseness, the content of this part has been presented on a summarized manner, highlighting the key contributions and innovations and omitting cumbersome details. Further details on the design of the various functions is available in internal documents and external publications. It is worth highlighting that the WP5 architecture definition has been described in two publications that have been jointly written by all WP partners. These two publications have been presented in two very relevant workshops in the area, namely 5Garch 2016 and CLEEN 2016, and have been very well received by the scientific and industrial communities. Part II of the deliverable focuses on the design of the underlying algorithms and protocols. Such algorithms and protocols are either required to implement some of the new functions within the proposed architecture (e.g., new algorithms are required in order to orchestrate the various network functions) or are enabled by the new capabilities of the architecture (e.g., the new architecture allows to perform mobility in a more efficient way). In particular, WP5 has proposed a total of 19 technical innovations around its architecture, corresponding to either new algorithms, protocols or technical solutions, each of which fills a given gap within the architecture. The second part of the deliverable provides a detailed description of each of these innovations, describing the motivation, its full specification as well as the advantages and performance gains. It is worth highlighting that most of the technical innovations presented in this document have either been published in top scientific venues, have been protected by a patent or have been pushed into standards. For example, the novel orchestration algorithms proposed in this paper has been published in a top journal such as IEEE TMC, several patents have been filed to protect the project ideas related to the QoS/QoE of video flows, and the proposals of the project on QoS monitoring and enforcement have been pushed into 3GPP. Dissemination level: Public Page 4 / 189 5G NORMA Deliverable D5.1 Table of Contents Executive Summary ..................................................................................................................... 3 Table of Contents ......................................................................................................................... 5 List of Figures ............................................................................................................................... 8 List of Tables .............................................................................................................................. 11 List of Acronyms and Abbreviations ....................................................................................... 12 PART 1: ARCHITECTURE ..................................................................................................... 18 1 Introduction ........................................................................................................................
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