From 959b2b1a8e3bc95d52bf6564329da3534a784e5b Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Mon, 26 Aug 2019 20:53:34 +0200 Subject: fixup --- .../how_the_camp_lte_works.html | 232 ++++++++++++++++++++- 1 file changed, 229 insertions(+), 3 deletions(-) (limited to '2019/cccamp2019-how_camp_lte_works') diff --git a/2019/cccamp2019-how_camp_lte_works/how_the_camp_lte_works.html b/2019/cccamp2019-how_camp_lte_works/how_the_camp_lte_works.html index 9a7c834..2fab7fb 100644 --- a/2019/cccamp2019-how_camp_lte_works/how_the_camp_lte_works.html +++ b/2019/cccamp2019-how_camp_lte_works/how_the_camp_lte_works.html @@ -3870,6 +3870,18 @@ using Osmocom stack with OsmoHNBGW / OsmoMSC / OsmoSGSN +
  • + +I’m still involved with developing the related software, but have handed over actual network operation at CCC events to a team around lynxis and bibor + + +
    • @@ -3947,7 +3959,7 @@ OpenAirInterface @@ -4032,7 +4061,7 @@ LTE: HSS, speaking DIAMETER
  • -We need a so-called 'inter-working function (IWF) +We need a so-called inter-working function (IWF)
    • +
  • + +code at https://git.osmocom.org/erlang/osmo_dia2gsup/ + +
    • -

    Network layout

    +

    Network layout (logical)

    @@ -4090,6 +4124,198 @@ UpdateLocation (registration)
    +

    Network layout (physical)

    +
    +
      +
    • + +6 eNodeBs distributed around the camp inside select Datenklos + +
        +
      • + +Ericsson RBS6402 with 23dBm in Band 7 + +
        • +
      • + +back-haul over regular CCC Ethernet as separate VLAN + +
        • +
      +
      • +
    • + +Stratum-0 NTP server with GPS receiver for eNB clock sync + +
        +
      • + +built on Raspi 3B with gpsd + ntpd + +
        • +
      +
      • +
    • + +Lenovo x240 Laptop running qemu-kvm for core network + +
        +
      • + +runs nextepc MME, SGW, PGW + +
        • +
      • + +runs osmo_dia2gsup for translating DIAMETER to GSUP + +
        • +
      +
      • +
    • + +Querying Camp 2G/3G OsmoHLR for subscriber data + +
      • +
    +
    +
    +
    +

    Radio paramters

    +
    +
      +
    • + +Telefonica O2 has provided (borrowed) 10 MHz of spectrum in Band 7 (2600 MHz) + +
      • +
    • + +We can use it either as one channel @ 10 MHz or two chnanels @ 5 MHz + +
        +
      • + +first four days were operated using 5 MJz channels (3 eNB on each channel) + +
        • +
      • + +last day was operated using 10 MHz channels (6 eNB on same channel) + +
        • +
      +
      • +
    +
    +
    +
    +

    Results (1/2)

    +
    +
      +
    • + +Telekom technician Peter "@33dBm" Schmidt has done some testing + + +
      • +
    +
    +
    +camp2019-lte-map2.jpeg +
    +
    +
    +
    +
    +

    Results (2/2)

    +
    +
      +
    • + +Telekom technician Peter "@33dBm" Schmidt has done some testing + + +
      • +
    +
    +
    +camp2019-lte-results.jpeg +
    +
    +
    +
    +
    +

    Thanks

    +
    +
      +
    • + +to the Camp GSM team for operating 2G/3G + +
      • +
    • + +to Eventphone / POC for handling user registration UI and voice interconnect + +
      • +
    • + +to Sukchan Lee (@acetcom) for writing nextepc + +
      • +
    • + +to Dieter Spaar for all of his support during the past 10 years + +
      • +
    • + +to Peter Schmidt (@33dBm) for professional rive (bike ride) testing + +
      • +
    • + +to Telefonica O2 Germany for borrowing us some of their Band 7 frequencies + +
      • +
    +
    +
    +

    EOF

    End of File

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