Huawei: Future-oriented LTEhaul network
According to the latest statistics of GSA, as of the end of November 2012, 113 operators in 51 countries have built LTE commercial networks, and the number of LTE users has exceeded 50 million. LTE has entered a new era of rapid development.
Compared with the traditional 2G/3G Backhaul bearer network, the LTEhaul network has a significant change in extension: downward extension, resulting in a new Fronthaul, corresponding to small indoor base stations covering indoor and outdoor scenes; upward extending to Corehaul, corresponding to Core and Backhaul networks Pull the scene.
The Backhaul network itself also has changes, corresponding to two scenarios of macro station aggregation and FMC aggregation. For the future LTE Haul bearer network, how to face the challenges of various scenarios will be the focus of operators in the LTE era.
In the Fronthaul network, the indoor hotspot coverage is divided into a WiFi access scenario (Scenario 1) and a LampSite scenario (Scenario 2).
The indoor hotspot WiFi scene is mainly concentrated in the office area, coffee shop, airport, etc. It is characterized by poor user mobility, few voice services, and a large number of data services. In these areas, operators face difficulties in obtaining transmission resources, a large number of remote devices need to be maintained, Opex costs are high, and carriers are required to meet the pressure of bursty traffic under large capacity. This requires the backhaul network to support easy-to-install (plug-and-play), maintenance-free (access virtualization) soft capabilities, while having a smaller footprint and lower power consumption.
The indoor LampSite scene is mainly concentrated in the Shopping Mall area. It is characterized by strong user mobility, large area, and a large number of voice and data service access. In these areas, operators face the challenge of ensuring the carrier-class service experience and rapid deployment of voice. This requires the backhaul network to support large bandwidth, multiple interfaces, and strong H-QoS scheduling capabilities. At the same time, it can support virtualization, easy installation, and maintenance-free operation to ensure high-quality experience for users under large services.
　　 Atomcell
It is a scene covered by Fronthaul outdoor hotspots, distributed in the bustling pedestrian street, city square, open-air cafe, which is characterized by complex deployment environment, no site available, and a large amount of voice and data access. For the scenario where there is a streetside cabinet resource (fiber, copper, GPON) (Scenario 3), the bearer device can support the multi-media (FE/GE, PON, etc.) access soft capability of the outdoor, and is friendly and convenient. Concealed, waterproof and lightning-proof, and hard to adapt to environmental adaptability. For scenarios where no access resources are available (Scenario 4), consider full-outdoor microwaves, rapid deployment (spherical microwave fast focus), fast turn-on (USB configuration), and maintenance-free.
The traffic brought by the hot spot coverage eventually aggregates to the macro station, which brings changes to our traditional macro station bearer. As shown in scenario 5, the bandwidth will increase by 4~5 times, and also requires higher reliability. The bearer device needs to provide a 10GE ring (the microwave needs to use a large-capacity E-band), has the ring network protection capability, dual-master backup, and is resistant to multiple points of failure. It can share power with wireless devices, and plug and play supports rapid deployment. At the same time, the wireless BladeRRU and 2G/3G frequency refarming to LTE, which requires the bearer equipment to have smooth evolution capability, greater switching capacity, and continuous upgrade to meet the future evolution of LTE/LTE-A.
After the macro station and the small station are aggregated, they enter the transmission room. As shown in scenario 6 in the figure, the transmission room is also the access point of the fixed service, and it is also the centralized management point of virtualization. This requires the bearer network to have multi-service access (IPv6, Multicast) capability, support for virtualization management, larger routing specifications, and meet 220mm deep and 2U high. It can benefit the existing OLT and SDH 300mm deep cabinets, and can share common network and common network management to achieve cost saving and fast. deploy.
LTE EPC is on the Core, wireless traffic extends to the Core, and the enterprise line crosses Backhaul and Core. The traditional Backhaul and Core networks are back-to-back solutions. Without reliable protection mechanism, it will bring long-term disruption services. Consider Backhaul network. And the Core network can provide end-to-end protection, end-to-end operation and maintenance management, and rapid service delivery, as shown in scenario 7 in the figure.
Therefore, we can see that the future mobile bearer network faces more application scenarios and brings more challenges to the traditional network. Huawei's LTEhaul solution is aimed at the seven major scenarios of change, matching pain points. Meet the demand, along with the operator, cross-domain mobile back to the rift.
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