Ericsson Minilink » History » Version 4
jolly, 02/19/2016 10:52 PM
| 1 | 2 | admin | [[PageOutline]] |
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| 2 | 1 | admin | = Ericsson Mini-Link = |
| 3 | 1 | admin | |
| 4 | 1 | admin | Ericsson Mini-Link is a series of commercially very successful microwave links. |
| 5 | 1 | admin | |
| 6 | 1 | admin | They are used world-wide for back-hauling GSM BTS and UMTS Node-B, i.e. for the |
| 7 | 1 | admin | A-bis and IuB-links. |
| 8 | 1 | admin | |
| 9 | 1 | admin | Every microwave link is a point-to-point link. |
| 10 | 1 | admin | |
| 11 | 1 | admin | Each side of the link has an IDU (In Door Unit) and ODU (Out Door Unit). |
| 12 | 1 | admin | |
| 13 | 1 | admin | === IDU === |
| 14 | 1 | admin | The IDU is responsible for transmitting and receiving at the respective microwave frequency (normally 7...38GHz). |
| 15 | 1 | admin | |
| 16 | 1 | admin | In the Mini-Link system they are most commonly they are called MMU. |
| 17 | 1 | admin | |
| 18 | 1 | admin | There are different types of MMUs, representing the different link speeds of the microwave link, e.g. |
| 19 | 1 | admin | * MMU 34+2 (1 E3 link at 34 Mbps plus 1 E1 link for mgmt) |
| 20 | 1 | admin | * MMU 4x2 (4 E1 links at each 2 Mbps) |
| 21 | 1 | admin | |
| 22 | 1 | admin | The MMU has connections for the data links (E1, E3, STM-1, etc.) as well as a coaxial wire connecting it with the |
| 23 | 1 | admin | ODU. |
| 24 | 1 | admin | |
| 25 | 1 | admin | === ODU === |
| 26 | 1 | admin | The ODU is contains the actual modem that modulates the E1, E3 or STM-1 link onto the IF (Intermediate Frequency) |
| 27 | 1 | admin | which is put on the coaxial link towards the ODU. |
| 28 | 1 | admin | |
| 29 | 1 | admin | Conversely, on a different IF, there is the down-link from the ODU towards the demodulator/decoder in the IDU. |
| 30 | 1 | admin | |
| 31 | 1 | admin | In the Mini-Link system, the ODU is commonly called RAU (Radio Access Unit). |
| 32 | 1 | admin | |
| 33 | 2 | admin | == Hardware Information == |
| 34 | 2 | admin | |
| 35 | 2 | admin | === IF-Link between IDU and ODU === |
| 36 | 2 | admin | There are three intermediate frequencies (IFs) that are being used: |
| 37 | 2 | admin | * Uplink IF at 350 MHz |
| 38 | 2 | admin | * Downlink IF at 140 MHz |
| 39 | 2 | admin | * Control IF at low frequency |
| 40 | 2 | admin | |
| 41 | 1 | admin | == Mini-Link Equipment that we have == |
| 42 | 1 | admin | |
| 43 | 1 | admin | === RAU === |
| 44 | 1 | admin | |
| 45 | 3 | jolly | ==== 7 GHz ==== |
| 46 | 3 | jolly | ||Qty||Type||Tx (MHz)||Owner|| |
| 47 | 4 | jolly | ||1||RAU1 N 7/11||7426-7484||Jolly|| |
| 48 | 3 | jolly | |
| 49 | 1 | admin | ==== 15 GHz ==== |
| 50 | 2 | admin | ||Qty||Type||Tx (MHz)||Owner|| |
| 51 | 2 | admin | ||1||RAU 15/13||14709.25-14823||LaForge (D)|| |
| 52 | 2 | admin | ||1||RAU 15/16||15024.25-15138||LaForge (D)|| |
| 53 | 1 | admin | |
| 54 | 2 | admin | ==== 18 GHz ==== |
| 55 | 2 | admin | ||Qty||Type||Tx (MHz)||Owner|| |
| 56 | 2 | admin | ||1||RAU1 18/11||17706.5-18009.5||LaForge|| |
| 57 | 2 | admin | ||1||RAU1 18/15||18716.5-19019.5||LaForge|| |
| 58 | 1 | admin | |
| 59 | 1 | admin | ==== 23 GHz ==== |
| 60 | 2 | admin | ||Qty||Type||Tx||Owner|| |
| 61 | 4 | jolly | ||1||RAU 23/56||22002.75-22513.75||Jolly|| |
| 62 | 4 | jolly | ||1||RAU2 L 23/76||22002.75-22288||Jolly|| |
| 63 | 4 | jolly | ||1||RAU2 N 23/76||22002.75-22288||Jolly|| |
| 64 | 2 | admin | ||1||RAU2 M 23/77||22288-22590.75||LaForge|| |
| 65 | 2 | admin | ||1||RAU2 M 23/79||23296-23598.75||LaForge|| |
| 66 | 1 | admin | |
| 67 | 3 | jolly | |
| 68 | 2 | admin | ==== 26 GHz ==== |
| 69 | 2 | admin | ||Qty||Type||Tx (MHz)||Owner|| |
| 70 | 2 | admin | ||1||RAU 26/24||24995.25-25445||LaForge|| |
| 71 | 2 | admin | ||1||RAU 26/29||26003.25-26453||LaForge|| |
| 72 | 2 | admin | |
| 73 | 3 | jolly | ==== 38 GHz ==== |
| 74 | 3 | jolly | ||Qty||Type||Tx (MHz)||Owner|| |
| 75 | 4 | jolly | ||1||RAU 38/12||37338-37619.75||Jolly|| |
| 76 | 4 | jolly | ||1||RAU 38/16||38598-38879.75||Jolly|| |
| 77 | 3 | jolly | |
| 78 | 1 | admin | === MMU === |
| 79 | 2 | admin | ||Qty||Type||Owner|| |
| 80 | 1 | admin | ||3||MMU 34+2||LaForge|| |
| 81 | 3 | jolly | ||6||MMU 34+2||Jolly|| |
| 82 | 3 | jolly | ||3||MMU 155/16||Jolly|| |
| 83 | 3 | jolly | ||3||MMU 155/128||Jolly|| |
| 84 | 2 | admin | ||2||MMU 4+2/8||LaForge (D)|| |
| 85 | 1 | admin | |
| 86 | 1 | admin | === SMU === |
| 87 | 2 | admin | ||Qty||Type||Owner|| |
| 88 | 1 | admin | ||2||SMU 16x2||LaForge|| |
