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相關(guān)專(zhuān)題：
The new age of mobile communication is arriving with the TD-SCDMA access technology. TDSCDMA is characterized by offering high volume voice and data services within 1.6MHz bandwidth. With its ability to handle asymmetric data, TD-SCDMA has offered an opportunity window for operators making benefits and creating profits on mobile Internet and multimedia.Radio Access Network(RAN) based on TDSCDMA meets all the requirements of the 3G services.Recommended by ITU, TD-SCDMA became one of 3G RAN standards of IMT-2000 family.It combines high spectral efficiency and adaptability of the future mobile service. NB-450LC meets all the requirements of the operators for all 3G services with its flexibility, general purpose and high efficiency.
NB-450LC characters
Seamless integration of voice and data services
Ideally suitable for mobile Internet and multimedia
Highest spectral efficiency
Flexible design
Omni and sectored smart antenna
12 TD-SCDMA carriers per cabinet
Support of all radio network scenarios--Macro, Micro, Pico and indoor coverage
Product Introduction
The development of NB-450LC is based on the mature SIEMENS-HuaWei Node B platform. Designed to handle symmetrical real-time services (circuit-switched) and asymmetrical data services (packet-switched), the NB-450LC supports concurrent circuitswitched and packet-switched services within the same TDSCDMA carrier. So the subscribers can be offered voice and data services by one UE.A TD-SCDMA carrier handles up to 24 simultaneous calls. Release LCR1 can be equipped with up to 3/3/3 configuration. With future releases in the networks, the NB- 450LC’s hardware is ready to accept up to 12 carriers. With 1.6 MHz bandwidth, the packet domain data rates can reach up to 384 kbps for high speed mobility operation.The adoption of TDD, Smart Antenna, Joint Detection and Uplink Synchronization asks TDSCDMA RAN network elements for higher requirements. NB-450LC provides a powerful platform for 3G services with its modularized architecture, powerful signal processing ability and downloadable software radio technology.NB-450LC adopts the newest technology to guarantee the global quality standards. It is a reliable solution to establish the 3G TDD mobile network.
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Smart Antenna Advantages Smart antenna is an adaptive antenna array which contains multiple antenna elements. The TDD mode of operation of TDSCDMA offers optimum support for the implementation of smart antennas technology due to the radio path reciprocity of downlink and uplink operating on the same carrier in both directions. Smart antennas minimize inter and intracell interference and increase the capacity of the system With the higher spectrum efficiency achieved by smart antenna, the number of basestations is reduced in metropolitan and heavy density city.Smart antennas’ high directivity also reduces the number of basestations required to 1/4 in rural areas with low population density.
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