Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Wake-on-LAN wikipedia , lookup
Recursive InterNetwork Architecture (RINA) wikipedia , lookup
Distributed firewall wikipedia , lookup
Zero-configuration networking wikipedia , lookup
Computer network wikipedia , lookup
Piggybacking (Internet access) wikipedia , lookup
Cracking of wireless networks wikipedia , lookup
One slice at a time: SDN/NFV to 5G network slicing / Cutting Edge One slice at a time: SDN/NFV to 5G network slicing The network modernization journey is one that every telco must take. NFV and SDN are the fuel, software and cloud define the route, and customer experience sits waiting expectantly at the destination. Telcos need to approach this transformative journey with three buzzwords in mind: agility, efficiency, and speed. But, to be really effective, end-to-end (E2E) network-wide slicing needs to happen. By Gary Maidment Adapted from the white paper NFV/SDN to 5G Network Slicing by Dr. Ling Yim-Kwong Fast, efficient, agile T the first mobile phone call in 1973. and mobile tech really joined hands Ten years later, Motorola rolled out with the first smartphone from he digital age has coalesced the first commercial mobile phone, Apple. A true game changer, this extremely quickly from the around a decade ahead of when the gave birth to the world of smart invention of the Internet Internet became big in the early 90s. phones and apps from OTT providers as ARPANET in 1969 and It wasn’t until 2007 that networked that we know and love today. 2016.12 ISSUE 81 63 CUTTING EDGE Regional Cloud Factory (Large Operator) Data Center Cloudification Tradition Telecom Network NFV New Services Service Migration SDN @ Wide Area Network SDN@Data Center Phase 1 Virtualisation & Cloudification Phase 2 Service Migration End-to-End Orchestration (Network & Services) Phase 3 Orchestration Network Slicing (Automation) Phase 4 Service Network Slice The four phases of NFV/SDN transformation People’s appetite for apps and social more efficient. They need to provide a in. Additionally, it takes time for networking has seen network traffic better experience at lower CAPEX and people to acquire the requisite skills shoot up, a trend that will continue OPEX. They also need to be agile, so and for organizations to transform the as new IoT services come into full telcos can quickly innovate and roll out way they work into this new software- force for consumers and verticals. the services that people want when and customer-centric mode. There are Up to 100 billion connections they want them. Efficiency, agility, and four phases involved in transformation are predicted for 2025, with an speed are set to become the hallmarks (as shown in the above graphic). estimated 8 billion of these coming of success. And NFV and SDN are the from smartphones. tools for transformation. However, a far more bullish approach to construction is possible However, profits for the telcos that To best apply this tech, 5G networks that compresses these phases and run the networks that underpin can be portioned into individual works like this: Build a separate the modern world are one of the slices, where each has independent NFV/SDN network, overlay it on the few things that aren’t heading characteristics for best delivering a telco network, and migrate legacy skywards. Ovum predicts that traffic particular service type and sharing services in one go. Despite the on broadband networks will increase resources between services and slices. concertina effect that this approach by 205 percent from 2015 to 2025. In contrast, global spending on broadband services will limp up by a Take it one step at a time? comparatively weak 51 percent over the same ten years. Grand aims are one thing, but implementation is another when 64 delivers, it’s still important to understand each phase. Phase 1: Virtualization and cloudification To stay profitable and meet traffic legacy networks and the maturity of Virtualization separates the hardware demands, networks need to be made the tech and ecosystem are factored and software functions of network 2016.12 ISSUE 81 One slice at a time: SDN/NFV to 5G network slicing / Cutting Edge elements (NE) like routers. switches for data forwarding and For example, each OpCo under network control. SDN, however, a multinational telco usually has It reflects a shift towards software- centralizes the control function in its own national network and defined functions based on advances a single network controller – the platforms. With optical fiber in computing hardware, which allows software-based SDN Controller. reducing transmission costs, computing power and storage to Then, the network router and switch it’s wise for multinationals to be shared and offers far greater only perform forwarding, cutting consolidate multiple national flexibility. Applications can run as costs on the elements that forward infrastructures into a cross-border efficiently on commercial-off-the- packets. international infrastructure. This shelf (COTS) hardware as they do on specialist hardware. concept – a common, unified, and The SDN controller oversees a large part converged platform – is referred of the network and easily finds the best to as a Regional Cloud Factory. For Alongside virtualization, computing routes for packets, which is especially multinationals, it allows advantages power and storage are shifting useful when the network is congested like running a single VAS platform from PCs to a centralized cloud or part of it is down. The controller’s instead of one for each OpCo. infrastructure that decouples decision-making ability is far superior to functionality and location. traditional routing where routers and Although synergy benefits for pan- Advantages include scalability switches make decisions based on a European or pan-African cloud and resource sharing, resilience, limited network view. factories are potentially huge, hurdles low power use, and efficiency. exist. These include regulatory Centralizing large amounts of data According to a Gartner report constraints, data security, privacy, for different uses from different published in January 2016, only 2 local customization versus regional users supports big data analytics percent of its clients have deployed content availability, and local versus and its wealth of corresponding SDN, with delays largely being regional support. For example, some applications. attributable to a lack of standardized services can be migrated to regional equipment. For telcos, large-scale centers, whereas others might be NFV extends virtualization technology deployment of SDN is still in its best served locally. to network infrastructure. NFV infancy. decouples the software functions from Regional cloud factory dedicated hardware, allowing Virtual Phase 2: Service migration Network Function (VNF) software National network architecture normally to run on commodity-based servers, comprises two or three layers, typically There are several strategies for which emulates an NE’s function and including access, aggregation, implementing NFV and SDN and performance. Commercially available and core. Cloud infrastructure is migrating services from legacy to products for doing this include vIMS also arranged in layers, which are new platforms. Each strategy must and vEPC. normally local, regional, and national consider service criticality and the SDN takes control data centers. For both, layering is interdependence of multiple services. better for performance, scalability, The main strategies are: Common transmission networks flexibility, resilience, maintenance, and comprise dedicated routers and consolidation. New service deployment such as 2016.12 ISSUE 81 65 CUTTING EDGE VoLTE with IMS and Bandwidth on for agile SDN and NFV operations. Each slice is optimized for a particular Demand (BoD) services for enterprises. Although early applications of EEO service type and each is E2E, are in place, such as China Telecom’s including the RAN and core. Unlike End of lifecycle updates where Cloud VPN, the first release of LTE, 5G air interfaces can be sliced legacy hardware and software need Open-O is scheduled for September dynamically or semi-dynamically. massive capacity upgrades, in which 2016. Several concurrent network slices can case it may be better to replace the platform. Phase 4: Network slicing Deploying a central SDN and NFV infrastructure; for example, a critical communications slice would provide ultra-low latency channels while the platform, which will allow big data Existing traditional mobile networks IoT slice would deliver a massive analytics to provide new integrated operate under a monolithic model number of connections. services. where a single network carries out Putting it all together all services, with protocols such as Unifying services to encourage the DiffServ in IP prioritizing different Network slicing is based on NFV deployment of new, more efficient services. But, the protocols tend to be and SDN technologies. Both NFV technologies. piecemeal, not E2E. and SDN need to be overlaid with Phase 3: End-to-end orchestration (EEO) orchestration, on top of which Network slicing is documented as EEO is required to coordinate the part of the NGMN's vision for 5G. two. Telcos like China Mobile, DT, The technology optimally arranges KDDI, KT, NTT, and SK Telecom As independent but complementary network resources for maximal cost- are making moves into slicing tech, technologies, both NFV and SDN efficiency to satisfy new and diverse with NTT already developing a slice can transform telco networks into 5G service demands. NGMN defines management system – a key part of software-based entities. But, network- slicing as E2E, including on core and the overall solution. wide applications with EEO on both access networks. technologies are necessary for the benefits to shine. 66 be deployed on a common physical The new 5G air interface supports What can Huawei do? network slicing. On a core network, Huawei is a leading provider of Orchestration yields the agility network slicing can be implemented NFV and SDN technologies and for operators to allocate network separately or ahead of the new 5G continues to play a leading role in resources efficiently and cut TTM. air interface. Each slice is a logical developing both. Providing products, Of the several initiatives to achieve self-contained network where a solutions, and consultancy services EEO across NFV and SDN, Open- service runs on its own network for operators, Huawei Consulting is Orchestrator (Open-O) managed by slice; for example, one slice could adept at helping telcos transform Unix Foundation is a key one. First be for video, one for IoT, another into the future – a future in which announced at MWC 2016, Open-O for critical communication, and so SDN, NFV, and network slicing on 5G is a collaborative effort that aims on. But, it’s also possible to group networks are poised to deliver service to develop the first open source multiple, similar services on one rollout benefits that can greatly ramp software framework and orchestrator network slice. up profitability. 2016.12 ISSUE 81