5G网络架构（英文版）

5G Network Architecture Summary

Core Content

The document discusses the transformation of 5G network architecture, emphasizing the importance of cloud-native design in enabling diverse service requirements and enhancing network efficiency. It outlines the key technologies and strategies that underpin this evolution, including network slicing, CloudRAN, and the new core architecture.

Main Viewpoints

• Cloud-Native Architecture is Essential: The transition to a cloud-native architecture is crucial for meeting the diversified needs of 5G services. It allows for comprehensive cloudification of access, transport, and core networks, supporting real-time, on-demand, and intelligent operations.
• Network Slicing for Diversified Services: End-to-end (E2E) network slicing is a foundational technology for 5G. It enables the creation of logically independent network slices tailored to specific service types (eMBB, uRLLC, mMTC) using a unified physical infrastructure.
• CloudRAN for Flexibility and Scalability: CloudRAN, built on the Mobile Cloud Engine (MCE), allows for flexible orchestration of real-time and non-real-time RAN functions. It supports multi-connectivity, improves network reliability, and reduces operational costs.
• New Core Architecture Enhances Efficiency: The 5G core network is restructured with control and user plane separation, flexible network components, and unified database management. These features simplify network operations, reduce signaling overhead, and support efficient resource allocation.
• Self-Service Agile Operation: 5G networks are designed to support self-service and agile operations. This includes automated service generation, maintenance, and termination, as well as the use of software-defined technologies (SDT, SDP, SDRA) for network slicing and resource management.

Key Information

1. Cloud-Native Architecture

• Definition: A cloud-native network architecture is based on data centers (DCs), where all network functions and service applications are hosted.
• Benefits: It enables agile, automatic, and intelligent network operations, and supports the deployment of a wide range of 5G services.
• Components: Includes cloudified access, transport, and core networks, as well as the use of SDN and NFV technologies.

2. Network Slicing

• Purpose: To meet the diverse service requirements of 5G, such as eMBB, uRLLC, and mMTC.
• Implementation: Based on a unified physical infrastructure, network slicing allows for customized service functions and independent O&M.
• Key Features:
  • eMBB Slicing: Requires high bandwidth, often deployed with caching in local DCs.
  • uRLLC Slicing: Demands ultra-low latency and high reliability, typically placed close to users.
  • mMTC Slicing: Involves minimal data interaction and can be deployed in local or regional DCs.

3. CloudRAN and MCE

• CloudRAN: Reconstructs the Radio Access Network (RAN) using cloud technologies. It enables flexible orchestration of real-time and non-real-time functions.
• MCE (Mobile Cloud Engine):
  • Acts as the central control and management entity for CloudRAN.
  • Supports multi-connectivity, RAN non-real-time functions, Wi-Fi AC, distributed gateways, and caching.
  • Reduces transmission costs by 15% and latency by 10ms through centralized processing.

4. New Core Architecture

• Control and User Plane Separation:
  • Simplifies the core network by separating control and user plane functions.
  • Reduces distributed gateway deployment costs and signaling overhead.
• Flexible Network Components:
  • Enables the deployment of network functions tailored to specific services.
  • Facilitates plug-and-play integration and scalable network operations.
• Unified Database Management:
  • Centralizes network status information (user and policy data) in a unified database.
  • Supports real-time synchronization and efficient data retrieval across data centers.

5. Self-Service Agile Operation

• SONAC (Service Oriented Network Auto Creation):
  • Implements automation for service deployment, resource scheduling, and fault recovery.
  • Utilizes software-defined technologies (SDT, SDP, SDRA) to create and manage network slices based on detailed data analysis.
• Benefits:
  • Reduces operating expenses.
  • Enables third-party industries to input their service requirements.
  • Simplifies the O&M process through automation.

Conclusion

Cloud-native architecture is the foundation of 5G innovation. It enables the deployment of diversified services, supports efficient network slicing, and enhances the overall agility and flexibility of the network. The integration of SDN, NFV, and CloudRAN is essential for achieving the performance and scalability required by 5G, and it paves the way for the future of telecommunications by enabling self-service operations and intelligent network management.