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diff --git a/2018/osmodevcon2018-rbs6xxx/osmodevcon2018-rbs6xxx.adoc b/2018/osmodevcon2018-rbs6xxx/osmodevcon2018-rbs6xxx.adoc new file mode 100644 index 0000000..bac015d --- /dev/null +++ b/2018/osmodevcon2018-rbs6xxx/osmodevcon2018-rbs6xxx.adoc @@ -0,0 +1,146 @@ +Ericsson RBS6000 Series +======================= +:author: Harald Welte <laforge@gnumonks.org> +:copyright: 2018 by Harald Welte (License: CC-BY-SA) +:backend: slidy +:max-width: 45em + +== Ericsson RBS 6000 Series + +* very popular series of Radio Base Stations (RBS) during last decade +* supports _many_ different configurations built from various modules +** *Digital Units* (DU) +** *Radio Units* (DU) +** miscellaneous bits like shelves / racks, fans, fuses, OVP, cables, PSU, ... +* supports both +** classic BTS cabinets with radio +** remote (tower mounted) radio heads + +== RBS 6000 Series Overview + +image::rbs6k-intro.png[width="100%"] + +== Think of it as "Lego" + +image::rbs6k-lego.png[width="100%"] + +== Example: RBS6201 Rack + +image::rbs6201-rack.png[width="75%"] + +== Example: RBS6201 Shelf + +Example shelf with 6x radio unit and 1x WCDMA digital unit + +image::rbs6201-shelf.png[] + +== GSM: DUG 10 + RUG + +* first generation GSM modules for RBS6000 +* closely resembles RBS2000 architecture +** *DUG 10* like RBS2000 IXU/DXU +** *RUG* like RBS2000 RRU: TRX +* interconnection between DUG 10 + RUG is still TDM, not baseband samples! + +== Digital Unit GSM *DUG 10* + +* up to 12 TRX, grouped in 1..6 logical BTS +* matches most closely IXU or DXU of previous RBS2xxx series +* no baseband processing inside, just protocol logic (LAPDm + RSL + OM2000) +* 6x HSIO connector for interface towards *RUG* +* 4x E1/T1 ports exposed on RJ45 connectors + +== Radio Unit GSM *DUG* + +* GSM only +* 2 TRX in hardware +** any of them can be GSM, WCDMA or LTE +* 48W per TRX un-combined +* 22W per TRX combined (internal hybrid combiner) + +image::dug.png[] + +== GSM: DUG 20 + RUS + +* second generation GSM modules for RBS6000 +* more closely resembles the UMTS + LTE modules +* all baseband processing in *DUG 20* +** digital baseband I/Q samples between *DUG 20* and *RUS* +* interconnection uses CPRI (Common Public Radio Interface) +* connectors typically SFP format. +** can be used with SFP optics + fiber (many km long) +** can be used with direct copper SFP interconnect cables (few m) + +== Digital Unit GSM *DUG 20* + +* up to 12 TRX, gruoped in 1..6 logical BTS +* includes baseband processing, unlike DUG 10 +* 6 SFP slots with CPRI towards Radio Units (*RUS*) +* 4x E1/T1/J1 ports exposed on two RJ45 connectors + +== Radio Unit Mulit-Standard *RUS 01* + +* GSM WCDMA and LTE +* 4 carriers over 20 MHz IBW +** any of them can be GSM, WCDMA or LTE +* up to 1x 80W (one multi-channel PA) +** 20W without special license key +** up to 80W with license keys + +image::rus.png[] + +* RUS 02 has 40 MHz IBW +** up to 8 GSM carriers +** up to 4 WCDMA or LTE carriers + +== UMTS: DUW + RUS + +* *DUW* is Digital Unit WCDMA +* is used with RUS or RRUS (like DUG 20) +* offers Iub interface to RNC +* no FOSS RNC, so not very interesting :( + +== LTE: DUL + RUS + +* *DUL* is Digital Unit LTE + + +== Combined UMTS + GSM setup (classic approach) + +image::1ru_per_sector_rbb12_1a.png[width="100%"] + +* works the same way with DUL + DUG for LTE + GSM + +== Combined UMTS + GSM setup (classic approach) + +image::2ru_per_sector_rbb22_2b.png[width="100%"] + +* works the same way with DUL + DUG for LTE + GSM + + +== GSM/UMTS/LTE in one: DUS 31 / 41 + +* *DUS* are _multi-standard DU_ (GSM/UMTS/LTE) +* DUS 31 capacity up to 24 GSM TRX +** or up to 12 GSM TRX combined with LTE +* DUS 41 capacity up to 48 GSM TRX +** or up to 12 GSM TRX combined with LTE +* Back-haul is Ethernet only, no E1/T1/J1 anymore +** it is presumed that it's like an internal software-only SIU-02 + +image::dus4101.png[] + +== Ericsson + Osmocom + +We do have some history of RBS2000 support + +* OsmoNITB has OM2000 implementation proven with RBS2000 +* OsmoBSC inherits that, but breaks voice (no E1 in `osmo-mgw` yet) +* OsmoBSC has `pcu_sock` interface for BSC-colocated PCU +* Adding E1/TDM user plane support to osmo-mgw would enable using Ericsson RBS again +* All that's missing for low-cost macro BTS with Osmocm is an inexpensive E1 interface +** see separate talk + +== EOF + +End of File |