5G MEC白皮书（英文版）.pdf

GTI 5G MEC White Paper 1 GTI 5G MEC White Paper GTI 5G MEC White Paper 2 GTI 5G MEC White Paper Version: V1.0 Deliverable Type Procedural Document Working Document Confidential Level Open to GTI Operator Members Open to GTI Partners Open to Public Working Group XXX Task 5G eMBB Architecture - MEC Source members XXX Support members GTI 5G MEC White Paper 3 Editor XXX Last Edit Date DD-MM-2019 Approval Date DD-MM-2019 GTI 5G MEC White Paper 4 Confidentiality: This document may contain information that is confidential and access to this document is restricted to the persons listed in the Confidential Level. This document may not be used, disclosed or reproduced, in whole or in part, without the prior written authorization of GTI, and those so authorized may only use this document for the purpose consistent with the authorization. GTI disclaims any liability for the accuracy or completeness or timeliness of the information contained in this document. The information contained in this document may be subject to change without prior notice. Document History Date Meeting # Version # Revision Contents DD-MM-2018 v0.1 Initial draft of GTI 5G MEC White Paper GTI 5G MEC White Paper 5 Table of Contents 1 Abbreviations . 6 2 Overview . 11 3 References . 12 4 5G MEC Industry Progress . 13 4.1 Introduction . 13 4.2 Standard Progress . 14 4.3 Business value and market demand . 16 4.4 MEC industry chain . 17 4.5 MEC business progress . 19 5 MEC Target Network Architecture in 5G . 21 5.1 5G Overall Network Architecture . 21 5.2 5G MEC overall deployment recommendations . 23 5.3 5G MEC development solution in 5GC . 25 5.4 5G MEC management and orchestration solution . 26 5.5 5G MEC Network Capability Openness . 27 6 MEC Key Solution and Innovation . 32 6.1 ETSI MEC reference archtecture . 32 6.2 MEC Virtualization Solution . 37 6.3 5G MEC security solution . 38 6.4 5G MEC hardware acceleration solution . 40 6.5 Mobility management of edge services in 5G network . 42 GTI 5G MEC White Paper 6 6.6 5G MEC charging solution . 45 7 Use Case and Trial . 47 7.1 VR Cloud Gaming . 47 7.2 TCP Optimization base on MEC . 48 7.3 Smart factory base on MEC . 50 7.4 Smart hospital base on MEC . 51 7.5 Smart port base on MEC . 52 7.6 Smart Refinery base on MEC . 53 8 Summary . 54 1 Abbreviations Abbreviations Description OT Operation,Technology IT Information Technology CT Communication technology ICT Information and Communication Technology GTI 5G MEC White Paper 7 MEC Multi-access Edge Computing MEP Multi-access Edge Computing Platform OTT Over The Top CDN Content Delivery Network DC Data Center eMBB enhance Mobile Broadband mMTC massive Machine Type of Communication uRLLC ultra Reliable operators have real estate space close to the end users for deploying MEC resources, so operators are MEC resources. owner. In the MEC industry chain, operators can provide services and content providers with a platform for GTI 5G MEC White Paper 18 rapid deployment of applications and services through MEC solutions developed by telecommunications equipment vendors. The operators MEC service platform allows service and content providers to schedule the required MEC resources (eg storage, computing) through the open interface and quickly deploy their own applications (eg monitoring video analysis, video and video streaming, IoT control) System operation); Third-party applications and content providers: Third-party applications (including OTT vendors such as iQiyi, Google, YouTube, Facebook or video CDN applications such as Akamai) and content providers (such as HBO, Netflix, CNBC, BBC) are based on carrier offerings The MEC service platform loads personalized services to provide new value services or enhance service availability for end users. telecommunications equipment vendors: telecommunications equipment vendors as operators of MEC equipment provide operators with core computing capabilities for edge computing. Component suppliers: Telecommunications equipment vendors need Intel, telecommunications and other chip manufacturers to provide MEC business platform.In addition, due to the different needs of customers in various industries, telecommunications equipment vendors need ISVs (independent software developers) who understand the needs of the industry to provide customized software solutions to support and provide business integration capabilities. At the same time, telecommunications equipment vendors are also actively exploring cooperation with operators and third-party vendors. Therefore, in order to achieve rapid development, MEC must build a complete ecosystem, and its business model needs to be jointly developed by various manufacturers. Focusing on the requirements and progress of MEC, technical characteristics and industrial cooperation requirements, the “ MEC Technology Forum” will be carried out through joint operators, research institutes, equipment manufacturers and other industrial chain partners to jointly develop the MEC development plan. After several years of advancement, the industry generally believes that MEC will be a common model for building a 5G network edge cloud, and the industry chain has also accelerated MEC promotion, prompting the rapid development of this technology, which is applied to many practical projects of operators. Improve the business experience of online users. In 2019, the speed of mobile network evolution to 5G will be further GTI 5G MEC White Paper 19 accelerated. MEC will play more value under the popularization of large-traffic services, thereby reducing the pressure on the core network and backbone transmission network, and improving the capability and value of the access network. Improve the user experience and promote the development of more business model applications. 4.5 MEC business progress Mobile Edge Computing (MEC) provides a good platform and convergence node for future service providers, industry applications, and infrastructure providers, which will incubate more business and provide a better experience for customers. Bring new business value. At present, the industry has reached two consensuses on MEC. First, MEC is an important component of the future 5G network, and is an important business support point for the Internet of Everything. Second, the business is first, through the rapid development and evolution of the business-driven network. As the fastest growing Internet and information technology country in the world, China provides a good foundation and first-mover advantage for the commercialization of new products and technology platforms. We have the responsibility and obligation to work together with the upstream and downstream of the industry chain to promote the maturity of the entire mobile edge computing industry and build a world-leading communications infrastructure. Operators and vendors in GTI actively participates in international organizations such as 3GPP and ETSI, actively improves related technical solutions, and continues to share strength in standardization organizations. At present, it has taken the lead in the domestic CCSA to establish the 4G MEC standard project, and in 2018 led the 5G MEC platform technical specification requirements and test specification requirements, providing a unified standardization plan for the future MEC scale commercial use. CMCC held the Edge Computing Summit on October 31, 2018, and jointly established the Open Computing Lab for Edge Computing in the industry. Together with the vertical industry partners in the 5G Lianchuang project, we will closely integrate edge computing technology with various vertical industry application scenarios. Edge computing applications for various industries are in the exploration phase. GTI 5G MEC White Paper 20 Since 2015, The Operators has launched MEC application pilots in more than 20 local networks in 10 provinces across the country. For the mainstream new services such as HD video, AR/VR,LBS application, cross-layer traffic optimization, etc., joint industry partners to launch MEC business pilots to promote industry maturity. GTI 5G MEC White Paper 21 5 MEC Target Network Architecture in 5G 5.1 5G Overall Network Architecture One of the significant change of the 5G network architecture is to support the Service Based Architecture (SBA) architecture, which is used for core network functions interact with each other. With the SBA, there are functions that consume services and those that produce services. Any network function can offer one or more services. The framework provides the necessary functionality to authenticate the consumer and to authorize its service requests. The framework supports flexible procedures to efficiently expose and consume services.MEC system deploy into 5G network shown as in the figure below. In the figure the MEC functional entities interact with the network functions of the 5G core network. The Session Management Function (SMF) is in a key position with its large number of responsibilities. Some of the functionality provided by the SMF includes session management, IP address allocation and management, DHCP services, selection/re-selection and control of the UPF, configuring the traffic rules for the UPF, lawful interception for session management events, charging and support for roaming. As MEC services may be offered in both centralized and edge clouds, the SMF plays a critical role due to its role in selecting and controlling the UPF and configuring its rules for traffic steering. The SMF exposes service operations to allow MEC as a 5G AF to manage the PDU sessions, control the policy settings and traffic rules as well as to subscribe to notifications on session management events. GTI 5G MEC White Paper 22 The User Plane Function (UPF) has a key role in an integrated MEC deployment in a 5G network. UPFs can be seen as a distributed and configurable data plane from the MEC system perspective. The control of that data plane, i.e. the traffic rules configuration, now follows the NEF-PCF-SMF route. Consequently, in some specific deployments the local UPF may even be part of the MEC implementation. MEC is deployed on the N6 reference point, i.e. in a data network external to the 5G system. This is enabled by flexibility in locating the UPF. The distributed MEC host can accommodate, apart from MEC apps, a message broker as a MEC platform service, and another MEC platform service to steer traffic to local accelerators. The choice to run a service as a MEC app or as a platform service is likely to be an implementation choice and should factor in the level of sharing and authentication needed to access the service. A MEC service such as a message broker could be initially deployed as a MEC app to gain time-to-market advantage, and then become available as a MEC platform service as the technology and the business model matures. Policies and rules in the 5G system are handled by the PCF. The PCF is also the function whose services an AF, such as a MEC platform, requests in order to impact the traffic steering rules. The PCF can be accessed either directly, or via the NEF, depending whether the AF is considered trusted or not, and in the case of traffic steering, whether the corresponding PDU session is known at the time of the request. In the MEC system the MEC orchestrator is a MEC system level functional entity that, acting as an AF, can interact with the Network Exposure Function (NEF), or in some scenarios directly with the target 5G NFs. On the MEC host level it is the MEC platform that can interact with these 5G NFs, again in the role of an AF. The MEC host, i.e. the host level functional entities, are most often deployed in a data network in the 5G system. While the NEF as a Core Network function is a system level entity deployed centrally together with similar NFs, an instance of NEF can also be deployed in the edge to allow low latency, high throughput service access from a MEC host. In MEC the services produced by the MEC applications are registered in the service registry of the MEC platform. To use the service, if authorized, a network function can directly interact with the network function that produces the service. The list of available services can be discovered from the NRF. Some of the services are accessible only via the NEF, which is also available to distrusted entities that are external to the domain, to access the service. In other GTI 5G MEC White Paper 23 words, the NEF acts as a centralized point for service exposure and also has a key role in authorizing all access requests originating from outside of the system. Finally another key concepts in 5G is Network Slicing that allows the allocation of the required features and resources from the available network functions to different services or to tenants that are using the services. The Network Slice Selection Function (NSSF) is the function that assists in the selection of suitable network slice instances for users, and in the allocation of the necessary Access Management Functions (AMF). A MEC application, i.e. an application hosted in the distributed cloud of a MEC system can belong to one or more network slices that have been configured in the 5G core network. 5.2 5G MEC overall deployment recommendations In the future, 5G network evolution and network deployment will build a communication cloud infrastructure based on SDN/NFV/cloud computing. In order to cater to this trend and development, the future network architecture will adopt the communication cloud TIC layout, distribute and build the edge, the city, and the core TIC at different levels, and uniformly plan the communication cloud resource pool to achieve unified network architecture for multiple access such as solid network, mobile network and Internet of Things. As shown in the figure, the communication network cloud architecture can be divided into four hierarchical units, including three layers of TIC and one layer of integrated access bureau. The specific features are as follows： 1) Core TIC GTI 5G MEC White Paper 24 The core TIC is deployed in the regional or provincial core bureau, serving the regional or provincial business, deploying regional or provincial operational management centers, such as the group OSS/NFVO, provincial cloud management platform, NFVO, VNFM, etc.; The core network control planes in the inner or the provincial area include the AMF, SMF, MME, and NB-IoT core networks; the media plane centrally controls the network elements such as the network element IMS. The core TIC performs unified management of network elements, unified network management, and unified management of infrastructure. The core TIC also implements NFVO and OSS collaboration. NFVO is responsible for virtual network scheduling, resource management, fault alarm, etc. OSS is responsible for business and resource coordination, as well as traditional network management. NFVO and OSS work together to realize unified management of traditional networks and virtu