Small cell is mainly composed of baseband board (BBU) and a radio frequency board (RRU). For the 4G baseband board, we use Qualcomm's baseband board solution. Currently the baseband board only supports 4G LTE.
The baseband board is responsible for directly accessing the 4G core network (EPC) through optical fiber or Ethernet. It determines the number of users, upload and download rates, and so on.
4G Small Cell Baseband ( BBU)
The 4G general small cell baseband module is a miniaturized, multi-standard, multi-band, 3GPP-compliant LTE baseband board. It is based on Qualcomm's FSM9955 + FTR8900 and supports two carriers at the same time. Power amplifier, DPD function, built-in GPS receiver and other functions can be used for both operator's commercial network and various private network occasions.
||l Number of carriers: 2 (can support 2 4G bands)
l Working frequency band: FDD LTE: B1, B3, B5, B8; TDD LTE: B38, B39, B40, B41; other frequency bands; (no frequency band limitation)
l Working bandwidth: 5/10/15/20 MHz
l Transmission rate: FDD: 300Mbps / 100Mbps TDD: 200Mbps / 20Mbps
l Network interface: 2 10/100 / 1000M adaptive Ethernet ports, RJ45 connector, (supports Ethernet transmission)
l Optical interface: 1 optical interface; (supports optical fiber transmission)
l Antenna interface (MIMO, separation of sending and receiving): DL TX1, TX2, TX3, TX4, MMCX-K RF connectors; UL RX1, RX2, RX3, RX4, MMCX-K RF connectors
l SNIFFER antenna interface: SNIFFER, MMCX-K RF connector;
l Maximum power consumption: <15W (low power consumption)
l Physical size: 145.52mm * 145.52mm (small size)
At the same time, a small base station gateway is also used, which can directly access the operator's core network through IPsec to solve the access gateway problem. The entire set of equipment has been maturely used at multiple sites such as China Unicom's bidding pilot, and has received good user feedback.
4G Small Cell Appearance
According to the size of the small cell power amplifier power, different equipment appearance have appeared: 40W small base stations, 20W, 10W, 5W, 1W or 100mW. According to the application scenario, it is divided into indoor home type or outdoor coverage.
||Office Ceiling Type
l Size（H×W×D）：200 x 200 x 62mm
||Outdoor High Power
Over 100 Sets been Sold