CCC Camp 2011 » History » Version 1
laforge, 02/19/2016 10:47 PM
| 1 | 1 | laforge | = Chaos Communication Camp 2011 = |
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| 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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| 8 | == Netork structure == |
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| 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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| 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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| 17 | == Materials == |
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| 19 | === BTS and accessories === |
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| 21 | We will most likely have Motorola Horizon I BTS in GSM 1800, though this is not certain yet |
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| 23 | * lots of patchcable for our E1 lines (Allnet TC75205E-500H == 500m for 89 EUR) |
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| 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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| 27 | === BSC and core network === |
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| 29 | We will run a single machine with mISDN or DAHDI E1 cards and [wiki:osmo-nitb] attached to a [wiki:lcr] via MNCC. |
