CCC Camp 2011 » History » Version 3
laforge, 02/19/2016 10:47 PM
| 1 | 1 | laforge | = Chaos Communication Camp 2011 = |
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| 2 | |||
| 3 | At the [http://events.ccc.de/camp/2011/ CCC Camp 2011], we will again be running an experimental OpenBSC network. |
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| 5 | The large area of the camp site and the number of users (expected in the 2,000 to 4,000 user range) make this an |
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| 6 | ideal test installation for OpenBSC. |
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| 7 | |||
| 8 | == Netork structure == |
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| 9 | |||
| 10 | Given that there is only a maximum number of 10 ARFCN in the DECT guard band that we could use, |
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| 11 | we cannot really afford to run many small BTSs. May small BTSs (single-arfcn) would mean that the capacity |
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| 12 | is split/fragmented over the camp site. |
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| 13 | |||
| 14 | Running few but large BTSs (many TRX) at higher power seems like the better strategy. It delivers |
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| 15 | capacity without restricting it locally, i.e. capacity can be used anywhere on the camp. |
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| 16 | |||
| 17 | == Materials == |
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| 18 | |||
| 19 | === BTS and accessories === |
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| 20 | |||
| 21 | We will most likely have Motorola Horizon I BTS in GSM 1800, though this is not certain yet |
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| 22 | |||
| 23 | 3 | laforge | * lots of patchcable for our E1 lines (Allnet TC75205E-500H == 500m for 89 EUR) |
| 24 | * lots of coaxial cable for connection the antennas with the BTS |
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| 25 | * BTS antennas (sector or omnidirectional) |
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| 26 | 1 | laforge | |
| 27 | === BSC and core network === |
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| 28 | |||
| 29 | We will run a single machine with mISDN or DAHDI E1 cards and [wiki:osmo-nitb] attached to a [wiki:lcr] via MNCC. |
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| 30 | 3 | laforge | |
| 31 | |||
| 32 | == Equipment availability == |
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| 33 | |||
| 34 | This is just a list of random equipment that we have at our disposal: |
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| 35 | |||
| 36 | === Harald === |
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| 37 | |||
| 38 | * several nanoBTS 1800 |
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| 39 | * 50m H2000flex cable |
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| 40 | * 20 N plugs for H2000flex |
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| 41 | * 6 7/16 to N adapters |
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| 42 | * 10 8dBi circular antenna (N-female) |
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| 43 | * various SMA-N pigtails and other adapters |
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| 44 | * 6 hybrid combiner/duplexer units from Horizon BTS (2x SMA PA in, 1x 7/16 Antenna, 1x N for Rx out) |
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| 45 | |||
| 46 | === Sylvain === |
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| 47 | |||
| 48 | * 1 resistive combiner/splitter (up to 2w) |
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| 49 | * 1 duplexer board |
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| 50 | * 1 LNA + rx filter board |
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| 51 | * 2 duplexer + LNA + Rx filter boards |
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| 52 | |||
| 53 | All SMA, all rated 3W max power. All 6V power supply |
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| 54 | |||
| 55 | === Dieter === |
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| 56 | |||
| 57 | * 2 nokia BTS, each 2 TRX |
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| 58 | * no combiner / splitter / duplexer, i.e. 2x Tx out and 2x Rx in |
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| 59 | * E1 back-haul |
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| 60 | * OpenBSC code has been completed and tested with 2 TRX |
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| 61 | * need to be transported to Berlin, no good packaging, heavy |
