Ovrrbu-bts. Pdf
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- AirLink 8000 1/30/00 BASE TRANSCEIVER STATION Release 1.00 2 - 5 1.2.1 BLOCK DIAGRAM OF THE BTS
| AirLink 8000
1/30/00 BASE TRANSCEIVER STATION Release 1.00 2 - 4 1.2 GENERAL DESCRIPTION The AirLink 8000 system Base Transceiver Station is described in this section. The design philosophy has been to use advanced technology in order to create a point to multi-point system with high bandwidth efficiency, and comparatively large range. Attention has been paid to expandability of future services and requirements, high reliability, service security, fraud prevention, emergency services, and many other features. The following information entails the workings of the BTS in conjunction with the CPE. Antenna characteristics are matched to the CPE along with controls signals. See the CPE Overview for a more complete description of the CPE. (BTS) Base Transceiver Station RF Customer Premises Equipment (CPE) Home 32 or 64 kbps Up to 200 Active Circuits w / RBU(s) AirLink 8000 1/30/00 BASE TRANSCEIVER STATION Release 1.00 2 - 5 1.2.1 BLOCK DIAGRAM OF THE BTS Multiple RBUs may be co-located to configure local cells or scattered to form multiple cells. Two RBUs can be located in each Base Transceiver Station Cabinet. Each RBU uses a separate RF transmitter and receiver front end but may share a single omni antenna with other RBUs or use a dedicated antenna. An RBU is configurable such that it is capable of operation in a contiguous cell deployment wherein the operation of any one cell does not prohibit the operation of any adjacent cells. The modular nature of the RBU accommodates a combination of redundant and high reliability hardware to provide the necessary resiliency to provide a high MTBF. The RBU interfaces with the DSCO via one to four E1 connections. An Operation, Administration, Maintenance, and Provisioning (OAM&P) interface is provided for each RBU, but the standard OAM&P interface is to the DSCO. The RBU connects to the Network Interface Unit (DSCO) which is the Eagle Telephonics, Inc. DSCO, via multiple E1 type connections. 75-ohm BNC or 120 ohm dB connector interfaces are available. Optional Forward Earthing is available on both interfaces. This E1 connection may be implemented via various interface links such as wire, optical fiber, or microwave radio. All external signal cables and field replaceable modules are accessible from the front of the Base Transceiver Station, with the exception of the antenna cables, which are accessible from the top of the Base Transceiver Station. E1 E1 E1 E1 E1 and ADPCM 1 2 3 4 32 Digital Receivers 4 3 2 1 Redundant Power Supplies Prime Power Redundant Bus Structure tải về 0.71 Mb. Chia sẻ với bạn bè của bạn:
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