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