Mainstream operators such as BT in the UK have adopted IP RAN scheme to build MBB bearer network.

The revenue growth brought by MBB cannot match the growth of data traffic. For operators, MBB still faces huge business challenges. How to build and maintain a good bearer network and efficiently support the rapid development of MBB has become a very important issue for many mobile operators.

The IP RAN solution is becoming the mainstream solution for MBB bearers in the industry due to its flexibility, support for future LTE, and FMC service bearer. Major operators such as VDF, TO2, AT&T, and BT have adopted the IP RAN scheme to build MBB bearer networks.

BT is the UK's largest fixed-line operator, and 75% of the UK's mobile bearer service is through the BT network. BT builds a bearer network and leases the pipeline to other operators, such as VDF, O2, FT, T-mobile and other operators. The original intention of the WEMB mobile bearer project is to solve the rapidly growing demand for mobile broadband services, thus providing users with a better business experience.

From 2007 to 2009, after a long period of investigation, BT terminated the construction of WEMB based on PBT and PTN due to network scalability, routing and forwarding capabilities, new service expansion and industry chain. The trend of convergence between fixed and mobile services is already a reality, and BT is also seeking ways to integrate FMC. At the same time, BT is also faced with new business needs, such as business bandwidth over-sale packages, which requires the carrier network to be open and flexible. BT requires that new bearer networks must meet the needs of integrated services and adapt to rapid business changes and evolution. In 2010, BT clearly defined its construction ideas, emphasizing strong IP scalability based on FMC, large-scale networking for large-capacity devices, simple IP operation and maintenance of SDH-Like, and IP RAN scheme for WEMB construction.

The IP RAN construction enables the BT mobile bearer network to meet the needs of integrated services and adapt to rapid business changes and evolution. The BT WEMB mobile bearer network meets the GSM/UMTS/LTE convergence application with its highly scalable and evolvable IP RAN. The access and RAN CE devices use H-QoS to flexibly schedule services, and make maximum use of the leased pipeline resources to obtain more rental revenue. At the same time, the high-precision 1588v2 clock scheme and rich OAM detection technology are introduced to improve reliability.

Telefonica is one of the world's largest communications companies and integrated service operators, with subsidiaries in Latin America, Europe, North America, Africa and Asia. Telefonica has clear ideas and plans for the development of its bearer network. Telefonica emphasizes the convergence and unification of fixed and mobile networks, maximizing the value of the overall network, and simplifying the network hierarchy, whether it is the access layer or the bearer network. It is an evolution to the direction of FMC.

Telefonica is currently promoting FMC convergence and transformation in the access layer and metropolitan area network, accessing base stations within 2 km through ADSL2+/VDSL2, upgrading all microwaves to Hybrid microwaves, and gradually developing into full-scale optical cable access, combined with packet microwave connection. Into form a unified IP access and bearer. At the beginning of the convergence of the backbone layer, the existing SDH stops expanding, transforms into a MESH network, and actively promotes the wave sinking to the convergence layer and upgrades to 100G. Convergence, core layer, and ultimately form the use of existing IP metropolitan area network to carry all services.

When constructing a new bearer network, Telefonica needs to realize any medium cooperation, realize low-cost multi-layer coverage, make full use of various access media, and integrate as many physical resources as possible, so as to effectively reduce the access cost of the access side of the network. At the same time, the bearer network deployment has flexible expansion and adapts to multiple service requirements. Reduce the cost of overall operation and maintenance through a unified technical solution and service deployment mode, and reduce the overall TCO of the network while providing flexible and rapid deployment of service capabilities.

Telefonica clearly stated that the bearer network should have comprehensive carrying capacity, from network architecture, technology selection, to business carrying capacity. At present, Telefonica has decided to develop towards the IP RAN, deploying IP integrated bearer networks in seven cities including Madrid and Barcelona, ​​and explicitly requesting VIVO to transition to IP RAN after the complete acquisition of VIVO, Brazil's largest mobile operator.

The biggest pain point for operators is that mobile Backhaul rentals are expensive. In the 2G era, the link between a pure wireless carrier from a Cell Site to a mobile switching office is basically a leased third-party network. Even Verizon and AT&T avoid a lot of rental fees. The mobile competition has turned to the data business field, which has intensified the Backhaul bandwidth requirements. In order to avoid duplication of investment, the new bearer network must adapt to the rapidly changing business needs and support the long-term evolution of the network.

At present, North American operators such as AT&T, Verizon, and Sprint have established IP RAN construction ideas. They believe that IP RAN can easily expand the network scale. The unified bearer network can effectively simplify the network structure, and at the same time, the advantages in the industry chain and operation and maintenance. Will significantly reduce operating costs.

The construction of North American operators is relatively uniform. In the metropolitan area, the IP RAN bearer network is built. Hybrid microwaves and optical fibers are used to access GSM/UMTS/LTE services in a co-site manner, and some 4G base stations cannot be covered by optical fibers. Consider using packet microwave access. At present, Sprint has built IP RAN in places such as Washington DC and is used to carry 4G networks.

IP RAN is a once-and-for-all solution for full-service operators, which can greatly reduce the configuration and maintenance workload and achieve a smooth evolution to LTE. As routing capabilities move toward the edge of the network, IP RAN can truly achieve deep FMC coverage, effectively reducing duplication of investment. At present, global operators have realized that integrated bearer is an inevitable trend of network development, and has begun to adopt IP RAN for commercial pilot and deployment. IP RAN will become the cornerstone of LTE development and FMC evolution.

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