Ericsson RBS6000 Series ======================= :author: Harald Welte :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