Improved mobile backhaul is a pressing issue that has arisen with demand for increased data transmission capacity in the mobile communications market and for mobile video and other types of high-volume content. Carriers that already have a mobile communications market can respond to these demands at less investment cost for facilities by upgrading their existing TDM backhaul facilities with its expensive equipment to an Ethernet system made up of inexpensive equipment. Hitachi provides these carriers with solutions for building an Ethernet-based mobile backhaul network.
Hitachi offers two methods for accommodating base transceiver stations: (1) a linear bus configuration that includes an AMN6200 communications center unit and AMN6200 local units for accommodating base transceiver stations, and (2) a network that links with an AMN1620 G-PON to accommodate scattered base transceiver stations.
In the linear bus configuration for local units, the AMN6200 ensures the availability of wavelength-based services and stable bands for carriers. In addition, by providing triple MUX with T1, STM-1/OC-3, and FE interfaces in a single transponder, the AMN6200 is able to handle both the current GSM service and the 4G service of the future in a single transponder. Because the AMN6200 enables migration to a dense wavelength division multiplexing (DWDM) system that multiplexes 32 wavelengths in a single-core optical fiber for bidirectional transmission, carriers are able to respond to always growing traffic needs. Carriers can therefore look forward to minimal operating costs in the future.
Furthermore, the ability to accommodate base transceiver stations in a configuration that also incorporates the AMN1620 simplifies a complex network, lowering maintenance costs. Because local units can accommodate both the GbE and STM-16/OC-48 interfaces, large-volume content services such as mobile video become possible. Also, the space-saving and power-saving design of local units translates into reduced installation and operating costs.
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