Multi-network Intelligent Coverage System（MICS）Description

The fiber distribution system uses software radio technology to digitally process and transmit RF signals to achieve better network transmission performance and intelligent processing.

The multi-system access unit couples the downlink RF signals of the CDMA and FDD-LTE sources into the fiber distribution system, converts them into digital signals, and then performs framing, which is photoelectrically converted into optical signals and then transmitted to the expansion unit through the optical fibers. At the same time, the optical signal uploaded by the extension unit is converted into a digital signal, and then de-framed, and then converted into an uplink RF signal and transmitted to the source. The main unit needs to have remote monitoring and management functions of the entire system.

The extension unit forwards the digital signal sent by the main unit to multiple remote units; at the same time, combines the signals uploaded by the multiple remote units and then transmits the signals to the main unit. The expansion unit needs to support chained cascade networking. The extension unit needs to support remote power supply to the remote unit. The expansion unit needs to support the remote monitoring and management function of the remote unit to which it belongs.

The remote unit converts the digital signal sent by the extension unit into a radio frequency signal to implement wireless coverage of CDMA and FDD-LTE. At the same time, the received uplink RF signal is converted into a digital signal and transmitted to the extension unit.

MAU external port

The panel diagram of the MAU is as below, and the port definition is shown in the table.

MAU panel schematic

The MAU panel ports are defined as follows:

No.	Port Name	Port ID	Port Description	Remarks
1	4 optical ports	OP1～OP4	digital optical port, communicate with the expansion unit	2U chassis front
2	OMT port	OMT	local commissioning	2U chassis front
3	power switch	POWER	/	2U chassis front
4	Indicator	RUN、Modem、ALM、PWR、SYN1、SYN2、SYN3、SYN4	operation, Modem operation, alarm, power indication and optical port synchronization indication	2U chassis front
5	Local commissioning port RS-232	RS-232	serial interface with computer (DB9 connector - Male)	2U chassis front
6	TERMINAL port	TERMINAL	Used to connect to OMC	2U chassis front
7	External alarm	RS-485	（DB9 connector- female）	2U chassis front
8	Modem coupling port	MODEM OUT	SMA,connect internal RF coupling port	2U chassis front
9	Backup battery switch	BAT ON/OFF	toggle switch	2U chassis front
10	RF port	CDMA、LTE1、LTE2	N head (50Ω)	2U chassis front
11	Modem antenna port	MODEM ANT	SMA, Modem extends directly to the panel for connecting to the Modem antenna	2U chassis front

MEU external port

The panel diagram of the outdoor MEU is shown in the figure, and the port definition is as shown in the table.

The panel diagram of the outdoor MEU
Outdoor MEU panel port definition

No.	Port Name	Port ID	Port Description	Remarks
1	3 OPLC port	OPLC（internal OPIN、OPOUT、OP1～OP8）	OPIN: used to communicate with the access unit or with the cascaded MEU OPOUT: Used for daisy chain expansion for extending communication between units. OP1~OP7: Used to connect with the MRU. All use composite cable for optical connection.	Side of the chassis
2	1 Ethernet port	Ethernet	Ethernet internal connection Ethernet LAN port communicates with broadband switch	Side of the chassis
3	Equipment power supply	AC200V-240V 50Hz/60Hz	the MEU power supply port	Side of the chassis

MEU external port

The panel diagram of the MRU is shown in the figure, and the port definition is as follows:

MRU (omnidirectional antenna type) appearance

MRU (room type) appearance

MRU (directional antenna) appearance
MRU panel port definition

No.	Port Name	Port ID	Port Description	Remarks
1	1 optical port	OPIN	Used to communicate between expansion units	Side of the chassis
2	Power outlet	DC48V	48V，external DC power supply	Side of the chassis
3	LTE-1 radio interface	LTE-1	Used for external antenna interface	This port is suitable for external remote
4	CDMA//LTE-2 RF interface	CDMA//LTE-2	Used for external antenna interface	This port is suitable for external remote
5	Remote indicator	/	Used for device fault diagnosis	Side of the chassis

Engineering Applications

MICS system networking is more diversified, in which the system access unit supports star networking, the expansion unit supports daisy chain networking (for extended units) and star networking (for remote), networking methods also have star groups Network, daisy chain networking and hybrid networking,as the picture shows:

daisy chain networking

star groups Network

 

hybrid networking