Motorola Horizon macro » History » Version 12
laforge, 02/19/2016 10:47 PM
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| 1 | 1 | laforge | [[PageOutline]] |
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| 2 | 2 | laforge | = Motorola Horizon macro BTS = |
| 3 | 1 | laforge | |
| 4 | The Motorola Horizon macro BTS is a BTS model manufactured by Motorola in the late 1990ies. |
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| 5 | |||
| 6 | It can support up to 6 TRX, typically in a configuration of 3 sectors. |
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| 7 | |||
| 8 | There is currently no support for it in OpenBSC, but we are working on it. |
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| 9 | |||
| 10 | == Hardware == |
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| 11 | |||
| 12 | 3 | laforge | [[Image(horizonmacro_cabinet_door_open.jpg, 50%)]] |
| 13 | 8 | laforge | [[Image(horizonmacro_cabinet_top.jpg, 33%)]] |
| 14 | 1 | laforge | === CTU === |
| 15 | |||
| 16 | The up to 6 CTU modules are the individual transceivers. They plug into the SURF RF backplane and have a front-accessible |
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| 17 | DB9 serial port, as well as a SMA connector for the TX PA output. |
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| 18 | |||
| 19 | This TX PA output is normally wired using a ~10cm semi-rigid SMA cable to the TX input port of a combiner. |
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| 20 | |||
| 21 | 6 | laforge | The CTU is of course fully shielded. But if you remove the shielding cover, it looks like this: |
| 22 | 7 | laforge | |
| 23 | 6 | laforge | [[Image(horizonmacro_ctu_pcb.jpg, 50%)]] |
| 24 | You can see |
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| 25 | * two diversity receivers in the top left part |
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| 26 | * digital section in the top right part |
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| 27 | * transmit section (exciter) in the center |
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| 28 | * RF power amplifier in the bottom right part |
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| 29 | |||
| 30 | 10 | laforge | The CTU has a serial console, we describe it in [wiki:Motorola_Horizon_macro/CTU_Console] |
| 31 | 1 | laforge | === Combiner === |
| 32 | |||
| 33 | The combiner / duplexer combines the TX signal of two CTU and duplexes it with the Rx path in order to be able to have two TRX attached to one antenna |
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| 34 | |||
| 35 | === MCUF === |
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| 36 | |||
| 37 | The MCUF is a full-size digital board and contains the BTS controller |
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| 38 | |||
| 39 | 4 | laforge | [[Image(horizonmacro_mcuf_pcb_top.jpg, 33%)]] |
| 40 | [[Image(horizonmacro_mcuf_front.jpg, 33%)]] |
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| 41 | 1 | laforge | === NIU === |
| 42 | |||
| 43 | The NIU is a E1 interface card for up to two E1 lines. Multiple NIU boards can be plugged into the rack |
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| 44 | |||
| 45 | 5 | laforge | [[Image(horizonmacro_niu_pcb.jpg, 50%)]] |
| 46 | |||
| 47 | 1 | laforge | === BPSM === |
| 48 | |||
| 49 | The BPSM is a small power supply for the NIU, MCUF and other digital boards |
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| 50 | |||
| 51 | 5 | laforge | [[Image(horizonmacro_bpsm_pcb.jpg, 50%)]] |
| 52 | |||
| 53 | === ALARMS === |
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| 54 | |||
| 55 | The ALARMS board is monitoring FAN and other alarms in the cabinet. |
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| 56 | |||
| 57 | [[Image(horizonmacro_alarms_pcb.jpg, 50%)]] |
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| 58 | 1 | laforge | === A-bis interface === |
| 59 | |||
| 60 | The A-bis interface is via classic E1 lines. The Horizon indoor cabinet supports up to 6 E1 ports. |
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| 61 | |||
| 62 | Each NIU module serves 1 or 2 E1 ports. |
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| 63 | |||
| 64 | The E1 ports are physically routed to the BIB (Balanced Interface Board) module on top of the cabinet. |
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| 65 | |||
| 66 | The pinout of the 37pin D-Sub connector on top of the BIB board has been reversed as: |
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| 67 | 8 | laforge | ||Pin ||Transformer||Usage|| |
| 68 | ||1 ||T1.1 ||NIUA0 Port 0 (Tx)|| |
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| 69 | ||2 ||T2.1 ||NIUA0 Port 0 (Rx)|| |
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| 70 | 1 | laforge | ||3 ||GND || |
| 71 | ||4 ||T4.1 || |
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| 72 | ||5 ||T5.1 || |
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| 73 | ||6 ||GND || |
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| 74 | ||7 ||T7.1 || |
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| 75 | ||8 ||T8.1 || |
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| 76 | ||9 ||GND || |
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| 77 | ||10 ||T10.1 || |
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| 78 | ||11 ||T11.1 || |
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| 79 | ||12 ||GND || |
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| 80 | ||13 ||T13.1 || |
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| 81 | ||14 ||T14.1 || |
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| 82 | ||15 ||GND || |
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| 83 | ||16 ||T16.1 || |
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| 84 | ||17 ||T17.1 || |
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| 85 | ||18 ||GND || |
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| 86 | ||19 ||GND || |
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| 87 | 8 | laforge | ||20 ||T1.8 ||NIUA0 Port 0 (Tx)|| |
| 88 | ||21 ||T2.8 ||NIUA0 Port 0 (Rx)|| |
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| 89 | 1 | laforge | ||22 || || |
| 90 | ||23 ||T4.8 || |
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| 91 | ||24 ||T5.8 || |
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| 92 | ||25 || || |
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| 93 | ||27 ||T7.8 || |
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| 94 | ||28 ||T8.8 || |
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| 95 | ||29 ||T10.8 || |
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| 96 | ||30 ||T11.8 || |
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| 97 | ||31 || || |
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| 98 | ||32 ||T13.8 || |
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| 99 | ||33 ||T14.8 || |
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| 100 | ||34 || || |
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| 101 | ||35 ||T16.8 || |
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| 102 | ||36 ||T17.8 || |
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| 103 | |||
| 104 | == Software == |
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| 105 | |||
| 106 | === MCUF === |
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| 107 | 8 | laforge | There is a 20MByte Intel Series2 Flash PCMCIA card inside the MCUF. It contains software + configuration for the BTS. |
| 108 | |||
| 109 | [[Image(horizonmacro_pcmcia_iflash2.jpg, 33%)]] |
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| 110 | |||
| 111 | There once has been a mtd_iflash2.c driver for Linux 2.4.x, but apparently it has never been merged mainline before the |
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| 112 | big CardServices API redesign happened in 2.6.x. So unfortunately it's not straight-forward to read them out :( |
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| 113 | |||
| 114 | The MCUF is able to run without the PCMCIA card. In this case, it will download all software + config via E1 from the BSC. |
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| 115 | |||
| 116 | 9 | laforge | The MCUF has a very extensive command line interface (MMI), for more information check [wiki:Motorola_Horizon_macro/MCUF_Console] |
| 117 | 8 | laforge | === CTU === |
| 118 | It is assumed that the CTU only contains a boot loader to download the real software from the MCUF. |
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| 119 | 11 | laforge | |
| 120 | == Further reading == |
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| 121 | |||
| 122 | * Motorola BSS11 Base Station Operational Aspects (Describes BTS hardware) |
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| 123 | * http://wenku.baidu.com/view/da379c82d4d8d15abe234e32.html |
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| 124 | * Motorola SYS01 GSM SYSTEM INTERFACES (Chapter 5: Mobis) |
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| 125 | 12 | laforge | * http://read.pudn.com/downloads61/ebook/212957/SYS01.pdf |
