宽带核心网(BNC)技术白皮书

Industry Overview - The broadband core network (BNC) is a strategic public infrastructure for China's economic and social development, playing a crucial role in implementing the network power and digital China strategies [10] - As of February 2024, China has 643 million fixed broadband users, with FTTH users accounting for 95.4% and over 100Mbps users accounting for 94.5% [11] - The broadband industry is transitioning from single-type ToH internet access services to composite ToB/ToH services, requiring more flexible, innovative, and secure broadband network capabilities [10] New Opportunities - Policy-driven opportunities: The "New Infrastructure" strategy promotes the upgrade from 100Mbps to "dual gigabit" networks, supporting high-quality economic development and new development patterns [12] - Internet evolution opportunities: Next-generation internet based on IPv6, with mobile internet IPv6 traffic exceeding 60% and fixed internet IPv6 traffic reaching 20% [12] - Business demand opportunities: Transition from simple home internet connections to diversified scenarios including home, enterprise, and campus applications, evolving towards fixed-mobile convergence [14] New Challenges - Operational challenges: Diversified broadband business scenarios require operators to shift from network construction and maintenance to business and customer service orientation [15] - Service experience challenges: Weak differentiated service capabilities for different users and businesses, leading to network pipeline issues [16] - Service capability challenges: Transition from traditional home internet to diversified services like FTTR, smart home, and edge cloud-network services, requiring rapid business innovation and intelligent operation capabilities [16] BNC Architecture and Vision - BNC adopts a "three-layer-one-base" architecture, including management plane, control plane, user forwarding plane, and an intelligent computing base [32] - The vision of BNC is to achieve end-to-end broadband network scheduling, rapid product innovation, and intelligent operation through AI integration [24] - BNC aims to provide computing-network integrated services by collaborating with edge cloud, 5G networks, and new data centers [24] Key Technologies - Control and user plane separation: BNC inherits the DBNG's separation model, enhancing network intelligence and comprehensive control plane functions [52] - Service-oriented architecture: BNC adopts a service-oriented architecture, enabling modular and decoupled deployment, elastic scaling, and rapid service launch [56] - Signaling-based business control: BNC completes user registration and business management through signaling, enabling innovative services based on broadband network signaling [59] Business Scenarios - Typical networking schemes: BNC control plane is deployed centrally by province, while user plane is deployed in a pooled manner by city, with 1+1 and 3+1 warm standby models [78] - Dedicated line signaling bearer: BNC provides session-level new connection capabilities for ToB dedicated line services, enabling centralized control and management [82] - Intelligent business acceleration: BNC provides acceleration channels for scenarios like online gaming, live streaming, and online education, improving user experience stability and fluency [84]