The general consensus of telecom carriers today is to build a unified multi-service IP bearer network to replace their legacy multi-service and multi-system telecommunications network in order to realize unified bearing, unified operation, unified management and unified maintenance, reduce operating costs, and boost service deployment flexibility and profitability. For such a unified multi-service IP bearer network, quality of service (QoS) is a basic requirement as important as high availability (HA).

The Huawei carrier-class multicast solution adopts technologies such as multicast Ping, multicast traceroute, and multicast NetStream to detect the end-to-end reachability and network topology, and to monitor the traffic. When integrated with third-party network management tools, these technologies can enable the multicast traffic on a network to be visible and manageable, thus providing ideal means for managing multicast video services.

FMC (Fixed-Mobile Convergence) is in the focus of attention of the communication industry. FMC means that users can use one terminal, one number and only needs to pay one bill to smoothly switch between fixed-line network and mobile network, so that users can enjoy the services with the same quality anytime and anywhere.

At present, it is universally agreed in the telecom industry that the next-generation network is based on multi-service IP bearer network. ATM network, as the former-generation packet switching network, will also gradually migrate to the IP network. To protect the investment in the current network through smooth migration from ATM to IP, Huawei launches a complete ATM migration solution.

Internet protocol version 6 (IPv6) is a substitute of IPv4, which is the core and basic protocol of the next-generation Internet. IPv6 has been 13 years since the Internet Engineering Task Force (IETL) approved RFC 1752. Today, IPv6 is facing the business applications on a large scale. The industry believes that IPv6 will fully boost the development of a series of new services and technologies particular in mobile communications and digital home appliances which is a reliable basic protocol for the all public informationization.

In a telecom network, high reliability is always the most basic but most crucial performance requirement. Especially for the voice service, the time for end-to-end protection switchover must be less than 200 ms. To meet this requirement, we introduce multiple MPLS TE protection technologies into the layers of IP bearer network including equipment, link, and network.

According to the definition by the 3GPP, RAN consists of radio network controller (RNC), radio base station subsystem (NodeB) and the transport networks (Backhaul) between RNC and NodeB. The RAN over All-IP requires the NodeB and RNC over IP and the transport networks over IP. If the NodeB and RNC IP-based is realized while the transport networks cannot, the IP RAN is of no sense.

Compared with the traditional TDM/ATM bearer mode, the IP protocol features simplicity, flexibility and service expansion convenience. It can avoid repeated investments by carriers in separated service networks and enable convenient network upgrading and maintenance, hence greatly reducing carriers' costs in network constructions, operations and maintenance. As a result, a necessary choice for many mobile carriers is to build IP bearer networks.

In 2006, "All IP" is becoming true in the network construction of the operator. The operator has basically stopped further construction of traditional voice switching networks, and the existing services are being adapted to IP bearer. For both new construction and reconstruction, the first issue to be solved by the NGN bearer network is availability.

The current router-based MAN model focuses on what technology, authentication mode, and reliability guarantee are used for L2 service convergence, how to guarantee the QoS (how to deploy CAC), and how to ensure security and reliability of the multicast service. Different solutions provide different ways to solve the said problems. The router-based solution can better solve these problems than the switch-based solution.

The DHCP+ access technology is an authentication technology for controlling user access by controlling the IP address allocation of the terminal user based on DHCP protocol. The DHCP+ technology is now in the preliminary stage of development, and no standards have been launched for it. It is commonly seen in the circumstances where the PPPoE access authentication mode is limited, e.g., BTV service application circumstance.

The MAN is bearing more and more important services. The traditional reliability technology, STP, however, cannot meet requirements of some services. To solve the problem, Huawei provides extensive solutions.

In the MAN, the access and aggregation layers more and more adopt the Ethernet technologies. Huawei provides a series of operable and manageable Metro Ethernet solution which can ensure the requirement of carrier-class service.