Miscellaneous Projects » Ericsson RBS 6xxx

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h1. Minimal RBS Assemblies

This page will document some minimal configurations of ericsson parts that need to be combined to create a working BTS.

h2. Option "A" (remote radio heads)

This is a configuration where we have a 2U rackmount unit indoor hosting the digital side (DUx) and one or multiple remote radio heads (RRUS) which are located outdoor at some height of the antenna pole, preferably as close to the antenna (RF cable loss) but taking into consideratoin the ~23kg load and wind load.

{{graphviz_link()

digraph G {

  rankdir=LR;

  subgraph cluster_pole {

    label="Antenna pole";

    Antenna;

    { rank = same; RRUS; RUPSU [label="48V PSU"]; };

  }

  subgraph cluster_cabinet {

    label="RBS 6601 cabinet";

    DUG;

    DUL;

    DUPSU [label="48V PSU"];

  }

  subgraph cluster_computer {

    label="Linux computer";

    OsmoBSC;

    mme [label="open5gs-mme"];

    CN;

    OsmoBSC -> CN [label="AoIP"];

    mme -> CN;

  }

  Antenna -> RRUS [label="coaxial (7/16)"];

  RRUS -> DUG [label="LC duplex via SFP"];

  RRUS -> DUL [label="LC duplex via SFP"];

  DUL -> mme [label="Ethernet (RJ45)"];

  DUG -> OsmoBSC [label="E1 (RJ45)"];

}

}}

h3. Parts list

|_.Qty|_.Model|_.Part|_.Description|

|1|[[DUG 20|DUG 20 01]]|KDU 137 569/x|Digital (baseband) unit for GSM|

|1|[[DUL 20|DUL 20 01]]|KDU 137 533/x|Digital (baseband) unit for LTE|

|1|RBS6601 cabinet|BFL 901 009|2U rackmount enclosure hosting DUL + DUG (Variant 1 or 2; have different DC connector)|

|2|RPM 777 193|RPM 777 193/00160|DC power cable between cabinet and DUG/DUL|

|1|1060550000|"Variant 2":https://www.digikey.com/product-detail/en/weidmuller/1060550000/281-4290-ND/4012622|RBS6601 cabinet 48V DC power connector housing for Variant 2|

|1|42816-0212|"Variant 1 housing":https://www.digikey.de/product-detail/en/molex/0428160212/WM1927-ND/283471|RBS6601 cabinet 48V DC power connector housing for Variant 1|

|2|42816-0212|"Variant 1 contact":https://www.digikey.de/product-detail/en/molex/0428150012/WM9166CT-ND/3829574|RBS6601 cabinet 48V DC power connector contact for Variant 1|

|1|-|-|DC power supply for DUx (-40.0V to -58.5V, absolute maximum of 1xDUL + 1xDUG = 190W)|

|1|RRUS xx||Remote Radio Unit (see below)|

|1|||DC power connector on RRUS side (maybe just screw terminals?)|

|1|||DC power supply for RRUS (or "PSU AC" option for AC mains connection)|

|1|-|-|Grounding cable with cable lug for M8 bolt|

|4||RDH 102 47/2|[[SFP-Transceivers]] (1x DUG, 1x DUL, 2x RRUS). 2.5Gbps CPRI line rate should be sufficient|

|2|||Duplex LC fiber patch cables (1x DUG-RRUS, 1x DUL-RRUS) compatible with transceivers|

h3. Compatible Remote Radios

Please see [[RRUS]] about a general description of the various Remote Radio Units.

The important fact here is:

* RRUS 11/61 cannot be used (no GSM support)

|_.Model|_.Band|_.Part|_.GSM Carriers|_.LTE Carriers|_.Instantaneous BW|

|RRUS 01|B5|KRC 118 70/x|1-4 (total)|1-4 (total)|20 MHz|

|RRUS 01|B8|KRC 118 71/x|1-4 (total)|1-4 (total)|20 MHz|

|RRUS 02|B0|KRC 161 264/x|1-8|1-4|40 MHz|

|RRUS 02|B8|KRC 161 261/x|1-8|1-4|40 MHz|

|RRUS 12|B5|KRC 161 321/x|1-8|1-2|40 MHz|

|RRUS 12|B8|KRC 161 262/x|1-8|1-2|40 MHz|

|RRUS 13|||1-8|1-3|

|RRUS 14|||1-8|1-3|

|RRUS 32|||

h2. Option "B" (classic radios)

This is a more classic deployment where a RUS (non-remote radio unit) is used instead of a RRUS.

on the positive side:

* they are much cheaper

* they are much more frequently found

on the negative side:

* they require some amount of active cooling

* the only official Ericsson racks are large (for 6 RUS equalling something like 2xRUS per sector of a 3-sector site)

{{graphviz_link()

digraph G {

  rankdir=LR;

  subgraph cluster_pole {

    label="Antenna pole";

    Antenna;

  }

  subgraph cluster_cabinet {

    label="RBS 6202 cabinet";

    DUG;

    DUL;

    RUS;

    PSU [label="48V PSU"];

  }

  subgraph cluster_computer {

    label="Linux computer";

    OsmoBSC;

    mme [label="open5gs-mme"];

    CN;

    OsmoBSC -> CN [label="AoIP"];

    mme -> CN;

  }

  Antenna -> RUS [label="coaxial (7/16)"];

  RUS -> DUG [label="RPM 777 211"];

  RUS -> DUL [label="RPM 777 211"];

  DUL -> mme [label="Ethernet (RJ45)"];

  DUG -> OsmoBSC [label="E1 (RJ45)"];

}

}}

h3. Parts list

|_.Qty|_.Model|_.Part|_.Description|

|1|[[DUG 20|DUG 20 01]]|KDU 137 569/x|Digital (baseband) unit for GSM|

|1|[[DUL 20|DUL 20 01]]|KDU 137 533/x|Digital (baseband) unit for LTE|

|1|RBS6202 cabinet|BFM 901 351|19" sub-rack for 2 DU + 6 RU|

|2|?|?|DC power cable between cabinet and DUG/DUL|

|1|-|-|DC power supply (-40.0V to -58.5V, absolute maximum of 1xDUL + 1xDUG + 1xRUS = 190W)|

|1|RUS xx||Radio Unit (see below)|

|1|?|?|DC power cable between cabinet and RUS|

|1||RPM 777 211/00900|CPRI cable between RUS and DUG/DUL (/900 = 90cm, diffeent lengths available)|

h3. Compatible Radios

Please see [[RUS]] about a general description of the various Remote Radio Units.

|_.Model|_.Band|_.Part|_.GSM Carriers|_.LTE Carriers|_.Instantaneous BW|

|RUS 01|B0|KRC 118 63/x|1-4|1-4|20 MHz|

|RUS 01|B5|KRC 118 64/x|1-4|1-4|20 MHz|

|RUS 01|B8|KRC 118 62/x|1-4|1-4|20 MHz|

|RUS 02|B0|KRC 161 263/x|1-8|1-4|40 MHz|

|RUS 02|B5|KRC 161 320/x|1-8|1-4|40 MHz|

|RUS 02|B8|KRC 161 260/x|1-8|1-4|40 MHz|