Full explanation of Broadband Access Network Operations

Broadband access networks are still developing very rapidly. Here we mainly introduce the new proprietary intellectual property rights process-based routing operating system, it includes comprehensive service support capabilities, in-depth packet detection capabilities, and comprehensive QoS Assurance capabilities. In the process of increasing bandwidth users and services and IP address-based telecommunication networks, as operators demand more business control and user management, business routers (SRS) and broadband access network servers (BRAS) have emerged. SR is used to connect users and network edges and undertake major customer services. BRAS is a Broadband Access Gateway for broadband network applications. It is used to complete user authentication and management and carry public user services. The two are deployed at the edge of the backbone network and man, and cooperate with each other to assume the role of Multi-Service bearer.

As users demand video and other services, operators will provide services to users in multi-service integration mode, and the defects of SR and BRAS will also begin to emerge. BRAS's support for PPPoE broadband access networks is limited in terms of service support capabilities and cannot carry high-quality services such as large-scale IPTV services. SR does not support PPPoE and does not have a user authentication mechanism, they cannot support operations independently. They are mutually restricted, seriously affecting the smooth development of integrated services. To help operators build an IP bearer network that comprehensively carries voice, data, video, and mobile services, integrating the functions of BRAS and SR into a unified hardware platform has become a trend, that is, multi-service routers (MSR), to realize large capacity, high bandwidth, and multi-service load. The ZXR10M6000 series telecom-grade multi-service routers are an MSR device integrated with BRAS and SR functions, which is developed by ZTE over the years and conforms to the Internet trend.
　
1. New proprietary intellectual property rights process-based routing Operating System

ZXR10M6000 series of products run the new generation of routing operating system developed by ZTE. It has the characteristics of "Separating up and down, separating left and right. First, the routing operating system kernel has a privileged-level protection micro-kernel structure. The routing operating system kernel only implements processes (threads) scheduling, memory management, simple device management, file system, service interruption, CoreDumping, and other important kernel functions, the network protocol stack, applications, and complex device management are all implemented in the user-state independent process space. The micro-kernel can ensure the efficiency and reliability of the kernel, and user program error operations cannot damage the kernel. Independent user processes isolate user faults and provide feasibility for user programs to achieve dynamic loading.

Secondly, based on the customer/Server mechanism and process-based software architecture, the system provides flexible scalability. When the system provides naming services unrelated to physical locations, it facilitates the system to implement distributed protocol processing, redundant backup mechanisms, NSR, and other advanced features.

2. Comprehensive business support capabilities

ZXR10M6000 provides a wide range of MPLSVPN functions and VPN tunneling functions such as IPSec, GRE, and L2TP. The IPSec tunneling technology is a basic technology to ensure IP Security, by configuring the same policy between peer entities, a secure IP packet transmission channel is established. The GRE tunnel technology encapsulates the datagram of some network layer protocols (such as IP and IPX, these encapsulated data packets can be transmitted in another network layer protocol (such as an IP address), that is, a channel is provided to enable the encapsulated data packets to be transmitted through this channel, l2TP tunneling is a layer-2 Tunneling Protocol Based on Point-to-Point Protocol (PPP). To improve security, IPSec and GRE and L2TP can be used in combination.

ZXR10M6000 supports IPv4/IPv6 PPPoE and IPoE efficient broadband access networks and precise control. It can meet the integrated development capability of the current operator's network and meet the development needs of the Next Generation Network, this service allows new carriers to build IPv6 networks. Precise binding of users' broadband access networks can help operators perform refined operations, improve network service quality, analyze user behavior, and develop new services in a timely manner, supports multiple value-added services, such as IPTV, BOD, VOD, and green internet access. It also provides development and business customization of various special functions to provide strong support for improving customers' competitiveness. The comprehensive service support capabilities of ZXR10M6000 can guarantee the development of VPN services for major customers, broadband access services for small and medium-sized enterprises, and access services for individual public customers.

3. In-depth packet detection capabilities

To meet the operator's statistics and analysis of user behavior, so as to provide refined operation, more close to user needs, ZXR10M6000 by configuring DPI dedicated board, conducts in-depth packet Detection Based on 5-tuples, users, and service types for data packets, and selects discard, throttling, or non-traffic processing methods for different traffic, detects VoIP, data, and multimedia in traffic, dynamically adjusts bandwidth and QoS, and provides users with optimal network resources, it also records users' online behaviors in real time and detects abnormal network intrusions and attacks to Ensure network security and provide more secure services, timely understanding of network bearer capabilities and early warnings for network resizing.

4. Comprehensive QoS Assurance

In telecom-grade high-end routers, TM chips are responsible for queue scheduling, Cache Management, traffic shaping, and other QoS functions. The ZXR10M6000 series first applied the multi-level TM Traffic Control Technology to the control plane of the entire system, the unique layer-3 TM control ensures more reliable processing of protocol messages and messages, generation and maintenance of routes, system configuration and maintenance, and information interaction between internal components, this effectively protects the control plane from data forwarding and malicious external attacks. Forwarding plane level 3 TM: input traffic manager I-TM, exchange traffic manager S-TM, and output traffic manager E-TM. Forwarding plane level 3 TM ensures end-to-end QoS of business data. control plane level 3 TM: input traffic manager C-TM, switch traffic manager CS-TM, and processor traffic manager CC-TM. Control Plane Level 3 TM ensures protocol and differential service for data management.

5. Enhanced reliability

ZXR10M6000 supports redundant hot backup of various components and online hot Patching of software (ZXR10M6000 series products support dynamic loading and online upgrade of software modules). It supports technologies such as GR, NSF, and NSR, it can achieve smooth hot switching and uninterrupted route forwarding, hot swapping and smooth upgrade of devices. Through MPLSFRR, IPFRR, LDPFRR, and other heavy routing technologies, TRUNK link bundling, and the comprehensive use of BFD, VRRP, VRRPTrack, and other functions, it provides efficient, controllable, fast, self-healing, and highly reliable networks.

6. Unified Control and Management Capabilities

The core of the ZXR10M6000 software architecture is a distributed operating system platform. It manages the hardware architecture of the entire system and provides a unified operating platform for applications on the entire software system, ZXR10M6000 adopts a unified network management system ZXIAM, which can reduce the time spent on training and network maintenance, reduce operating costs.

The SMART system monitoring function of ZXR10M6000 allows you to quickly detect, process, and record system exceptions, and promptly and effectively trigger status alerts, recover errors, and switch equipment through LCD display; the intelligent and dynamic power consumption adjustment system of the monitoring system supports adjustable and stepless fan speed change and automatic adjustment of port-level power consumption, which can help operators effectively save energy and reduce environmental pollution. ZXR10M6000 series routers, as a carrier-class multi-service device launched by ZTE based on years of R & D of SR and BRAS, will help operators operate their next-generation converged networks.