GTI-5G网络切片白皮书v2.0（英文）.docxVIP

GTI5G Network SlicingWhite Paper V2.0 GTI Version: V2.0 Deliverable Type □ Procedural Document N Working Document Confidential Level N Open to GTI Operator Members N Open to GTI Partners □ Open to Public Working Group XXX Task 5G eMBB Architecture - Network Slice Source members ZTE,Huawei,Nokia Support members ZTE,Huawei,Nokia Editor ZTE,Huawei,Nokia Last Edit Date 31-01-2019 Approval Date DD-MM-2019 premium services are supported by the network. 3 Key Technologies of E2E SlicingEnabling Technologies of the Network Domain Core NetworkThe Core Network (CN) is considered as the most critical and essential part in network slicing. The CN provides the network services for the tenants and their end users, for instance control plane functions (mobility management, session management, policy control, and charging) and user plane functions (data forwarding). To meet the diversified demands of vertical industries, the network service customization and on-demand deployment are the key concepts that need to be reflected in the CN design. The CN is envisioned to have the following attributes: Cloudification: Cloud native technology adoption will enable the future CN to support a large number of NSIs over common infrastructure, which is based on a three-tier DC networking mode. The bottom layer is the edge DC that is close to or on the access sites. The second layer is the local DC, and the upper layer is the regional DC. Taking advantage of cloudification and virtualization, it is possible to let the NSIs “breathe，in the sense of scaling the resources up and down according to the real traffic needs. Service-Orientation: In 5G, CN will apply service-based architecture to realize flexible orchestration of network functions, services as well as capabilities, which aims to satisfy diverse requirements from different tenants with high network operation efficiency. As illustrated in Figure below, the CN architecture defines the services provided by different network entities and the