ericsson minilink equipments

MINILINK MINILINK TN & HCTN & HC

MINI-LINK Outdoor Units Mini-link point to point antennas are directional

parabolic antennas and they are available in the following diameters:

0.2 0.3 0.6 1.2 1.8 2.4 3 3.7

0.2, 0.3, 0.6 antennas with RAU2

Separately installed antenna

Compact antennas

Integrated power splitter

Antenna UnitsGain and size

Antenna size (m)Frequency range (GHz)

7/8131518 23 26 28 32 38

0.231.833.834.635.437.5

0.332.134.436.237.338.038.840.4

0.632.036.036.639.240.041.542.443.544.3

1.237.041.842.744.646.047.147.949.0

1.841.045.346.448.549.5

2.443.147.748.7

3.045.149.7

3.747.3

Antenna Units3 dB Lobe width

-3 dB

-3 dB

Frequency bandAntenna

0.3 0.6

7 GHz8 GHz

13 GHz15 GHz18 GHz23 GHz26 GHz38 GHz

… 4.2 … 3.9 … 2.8 4.2 2.5 3.9 2 3 1.5 2.5 1.3 1.6 0.8

Radio Unit (RAU)

• The basic function of RAU is to generate and receive the RF signal and convert it to/from the signal format in the radio cable connecting the RAU and MMU

• Disconnection and replacement of RAU can be done without affecting antenna alignment

• DC power to the RAU is supplied from the MMU through the radio cable• The RAU is capacity dependent and available in three classes including

Medium capacity RAU, High capacity RAU and Agile RAU• The frequency is determined by the RAU and it can be set in 0.25 MHz

stepsThe Output power limit canbe set from OMC. But thisfeature is not available for RAU1 26

Different Thresholds

RAU Types

RAUX Y F

• X: Mechanical design which is 1 or 2

• Y: MMU Compatibility and capacity

- “Blank”: Medium capacity RAUCompatible with CQPSK, supports 2x2 to 34x2 in a range of 7

to 38 GHz like RAU2 23 - “L”: High capacity radio units

Supports 155 Mbit/s capacity using 128 QAM like RAU1 L 8 - “N”: Agile

Compatible with CQPSK, 16 QAM and 128 QAM and supports 2x2 to 155 Mbit/s like RAU2 N 23

• F: Frequency band

RAU

7 GHz8 GHz13 GHz15 GHz18 GHz23 GHz26 GHz28 GHz32 GHz38 GHz

C-QPSK(PDH)

16QAM(PDH)


128QAM(SDH)


RAUAutomatic Power Control (ATPC)

The received signal strength is compared to a preset value

The far end transmitter is ordered to adjust the output power, up or down, in order to meet the target

Benefits:- Interference reduction- Reduced power consumption

Setting is done in MMU and usually the power is set in 3-6 dB above threshold

Terminal Configurations1+1 Hot Stand-by

1+1 Hot Stand-by:• Improved availability by hardware redundancy•1 radio channel•1 transmitter is active• TX switch on hardware alarm• 2 radios receiving• 1 Receiver selected as active• Receiver switch on hardware alarm

Terminal ConfigurationsHot Stand-by and Space Diversity

• Hardware availability improvement • Improved radio path performance by receiver switching on radio propagation alarm - Multi-path fading - Reflection• h=80/f [GHz]• Usually alarm will happen when signal is 10 dB more than threshold• Consider wind load

Terminal ConfigurationsWorking Stand-by and frequency diversity

2 radio channels

• Improved availability by hardware redundancy• Improved propagation performance (Multi-path)• Doesn’t effect ground reflection• 2 radio channels• 2 radio transmitting, 2 radio receiving• 1 receiver selected as active• Receiver switch on hardware and propagation alarm• f2=1.05 f1

Different Configurations1+0 Terminal Mounting

Different Configurations1+1 Terminal Mounting

Different ConfigurationsPower Splitters

1 dB loss

7 dB loss

3 dB loss

3 dB loss

Asymmetrical Power Splitter (1+1 Hot Stand by)

Symmetrical Power Splitter (1+1 Working Stand by)

Indoor Units

• Access Termination Unit (ATU)• Access Module Magazine (AMM) with plug-in units: - Ethernet Interface Unit (ETU), optional- Line Termination Unit (LTU), optional- Modem Unit (MMU)- Node Processor Unit (NPU)- Power Filter Unit (PFU)- Switch Multiplexer Unit (SMU), optional

AMM 2p

• Suitable for end sites and repeater sites• Max 2 radio units• Fitted in a rack or a wall• power supply is integrated with NPU2 (-48 or +24)

AMM 6p

• Suitable for medium size hub sites• Max 5 radio terminals• Filled with NPU 8x2, MMU & LTU (16x2)• For 1+1, MMUs should be adjacent and starting at even slots• -48v connected to PFU (24 needs DC-DC kit)

AMM 20p• Suitable for large size hub sites (Intersection of optical network and microwave network• NPU 8x2, one or two PFU1• protected pairs in a 1+1 configuration are positioned in adjacent slots starting with an even slot number• FAU1 is fitted on top of the AMM• AMM 20p is power supplied by -48 V DC connected to PFU or ICF• Using 24 V DC needs DC/DC kit

Node Processor Unit (NPU)NPU implements the system’s main traffic and control functions

NPU2AMM 2pAdd/drop possibility of 4xE1 trafficUSB port for on site management

NPU 8x2AMM 6p and AMM 20pAdd/drop possibility of 8xE1 traffic3 relay user outputs/ 3 relay user inputs

• Traffic handling and node central processor• System control and supervision• Embedded DCN router and element manager• SNMP Master Agent• 10BASE-T Ethernet interface for connection to a site LAN• Storage and administration of inventory and configuration data

Modem Unit (MMU)• MMU is the indoor part of the radio terminal• MMU determines the traffic capacity and modulation

MMU 2: - Modulation: CQPSK - Capacity: 2x2, 4x2, 8x2, 17x2 - In case of 1+1, SMU is needed

MMU 2B: - Modulation: CQPSK - Capacity: 2x2, 4x2, 8x2, 17x2 - In case of 1+1, SMU is not needed

MMU 2C: - CQPSK 4x2, 8x2, 17x2 - 16 QAM 8x2, 17x2, 32x2 - In case of 1+1, SMU is not needed

Hint: •C-QPSK MMUs are compatible with RAU1, RAU2, RAU 1N and RAU 2N•16 QAM MMUs are compatible with RAU 1N and RAU 2N

ATU: - Modulation: CQPSK - Capacity: 2x2,4x2, 8x2, 16x2 - Single board solution for unprotected configuration

Switch Multiplexer unit (SMU)

• Multiplexer: External traffic interfaces with the following capacities (one at the time):• 1 E3 + 1 E1• 2 E2• 2 E1E1, E2 and E3 traffic interfaces may be used for connection to MINI-LINK E on the same site, or as interface to other external equipment.

• 1+1 protection switching with MMU2

• 2x64 Kbit/s G.703 Digital Service Channels

• V.24 access server port interface used for local SW upgrade or as terminal server for O&M connection to co-sited MINI-LINK E terminal

Line Termination Unit (LTU)LTU 12x2•Used in AMM 2p, when 4 E1 of NPU is not enough, 120 ohm balanced

LTU 16x2•Used in AMM 6p and AMM 20p, when 8 E1 of NPU is not enough, 120 ohm balanced

Power Filter Unit (PFU)

Power Filter Unit 2 (PFU2)

• Power filter unit for AMM 6p

• -48V DC input

Power Filter Unit 1 (PFU1)

• Power filter unit for AMM 20p• Two PFU1s configured for redundancy• Half size to accommodate two units in

one full-height position• Alarm interface towards FAU1• -48V DC input

Configuration example1+0

AMM 6pAdd/Drop 2 Mbit/s

Configuration example

Configuration rules

• AMM 20p- 1+1 with MMU2:

Starting at slots 2, 6, 14 or 18- 1+1 with MMU2B/C

Starting at even slots except for slot 12- 1+1 MSP

Staring at even slots- No MMU in slot 12- NPU in slot 11 and PFU in 0 and 01

• AMM 6p- 1+1 with MMU2:

Staring at slot 2- 1+1 with MMU 2B/C

Staring at slots 2 or 4- 1+1 MSP

Staring at slots 2 or 4- NPU in slot 7

MINI-LINK HCAccess Module Magazine (AMM)

AMM 1U-1 2 Plug in units Max 1 radio terminal

AMM 2u-4 4 plug in units Max 2 radio terminals

U=44 mm

Modem Unit (MMU)

Traffic rate: 155 + 2 Mbit/s

MMU 155/16: 16 QAM Modulation, 56 MHz BandwidthMMU 155/128: 128 QAM Modulation, 28 MHz Bandwidth

The main function of the MMU is to modulate the STM-1/OC-3 digitaldata to an analogue signal suitable for microwave transmission anddemodulate the received signal from the RAU.

*Note: The MMU is fully independent of frequency of the transmitting radio

Traffic Unit (TRU)

• One TRU per terminal in 1+0 and 1+1 (2 TRU in 1+1 ELP)• Termination of traffic and O&M DCN• Embedded IP router, Element Manager and terminal MIB

TRU EL

TRU OPT/EL

Interfaces

TRURJ-45

9 Pole D-SUB9 Pole D-SUB9 Pole D-SUBSC/SC9 Pole D-SUB9 Pole D-SUB DIN 47297

1.0/ 2.3 mm

25 Pole D-SUB

E1/T1

FAN Alarm

64 Kbit/s G.703

User I/O

10BASE-T

O&M

64 Kbit/s V.11

STM-1 Opt. / OC-3

STM-1 El.

MMUTNC2 Pole D-SUB

LEDSDC in RAU


AMM 2U-4

MMU

TRU

MMU

Configuration Example1+1 ELP

DMR (Frequency/Distance/Capacity)DMR (Frequency/Distance/Capacity)Frequency bandAntenna diam.Path length (km)Capacity

3.6 – 4.2 GHz3.0 – 3.7 m40 – 65 kmE4 & STM-1

4.4 – 5.0 GHz2.4 – 3.0 m40 – 60 kmE4 & STM-1

5.9 – 6.4 GHz2.0 – 3.0 m30 – 55 kmE4 & STM-1

6.4 – 7.1 GHz2.0 – 3.0 m30 – 55 kmE4 & STM-1

7.1 – 7.9 GHz 0.6 – 3.0 m15 – 50 kmE1 - E4 & STM-1

7.7 – 8.3 GHz 0.6 – 3.0 m15 – 45 kmE1 - E4 & STM-1

10.7 – 11.7 GHz 0.6 – 3.0 m5 – 35 kmE4 & STM-1

12.7 – 13.3 GHz 0.3 – 2.4 m5 – 30 kmE1 - E4 & STM-1

14.5 – 15.3 GHz 0.2 – 2.0 m5 – 30 kmE1 - E3 & STM-1

17.7 – 19.7 GHz 0.2 – 1.8 m 2 – 20 kmE1 - E4 & STM-1

21.2 – 23.6 GHz0.2 – 1.2 m0.5 – 5 kmE1 - E3 & STM-1

24.2 – 26.5 GHz0.2 – 0.6 m0.1 – 3 kmE1 - E3 & STM-1

37.0 – 39.5 GHz0.2 – 0.6 m0.1 – 1.5 kmE1 - E3 & STM-1

60 GHz0.2 – 0.6 m0.1 – 1 kmE1 - E3

Note: Distance values are approximate and valid for Swedish climate

ericsson minilink equipments

Documents