Outdoor Distributed Antenna System RADIUS is intended to provide GSM-R, LTE, UMTS, and GSM coverage along railways, roads and rural areas. The system allows increasing network capacity efficiency and reducing infrastructure cost (CAPEX/OPEX).
oDAS RADIUS is designed for integration with GSM-R, LTE FDD, UMTS, and GSM networks, and provides serial distribution of up to 4 sectors (frequency bands) of a base station (BTS) to cover long-distance territories such as roads and railways.
RADIUS FSC is installed at the site with a base station and receives from BTS (RRH or RSU) the GSM-R, GSM, UMTS, and LTE carriers, converts them to MWL or to fiber optic channel and transmits over a distance.
RADIUS FSR is installed at the remote site and receives and converts two carriers (optionally, up to 4) from MWL or fiber optic to cellular signals providing remote sectors similar to BTS (one carrier in each sector). In addition, it amplifies and transmits the received signal further along the line (using fiber optic or integrated MWL) to the next site equipped with RADIUS FSR.
SM module is designed to generate additional sectors at the site equipped with FSR, and to provide MIMO technology as well.
| Parameter | Value |
|---|---|
| Retransmission channel type | — microwave link (MWL) — fiber optic (FO) |
| Frequency band, MHz: | |
| — GSM (GSM-R) | 873—915 — UL 918—960 — DL |
| — UMTS | UMTS Band 1: 1920—1980 — UL 2110—2170 — DL |
| — LTE | LTE Band 3: 1710—1785 — UL 1805—1880 — DL |
| — microwave link | 6425—7125 |
| Transmitters output power, dBm: | |
| — GSM(GSM-R)/LTE/UMTS (per carrier) | 40—43 (max power) |
| — microwave link (total) | 23 (configurable) |
| Main combinations of retransmitted GSM (GSM-R)/ LTE/ UMTS carriers | — one LTE 20 carrier — up to two LTE 10 carriers (one MIMO LTE 10 carrier) — up to four GSM (GSM-R) / LTE 5/ UMTS 5/ NB-IoT 180 carriers (two MIMO LTE 5 carriers) |
| Number of carriers for one GSM (GSM-R)/ UMTS/ LTE transceiver in FSR unit | 1 |
| Number of GSM (GSM-R)/LTE/UMTS transceivers per FSR unit | 2 (4 optionally — 2 additional external transceivers SM modules can be connected for UMTS/LTE only) |
| Number of FSC inputs/ outputs for receipt of GSM (GSM-R)/ LTE/ UMTS carriers from BTS | 4 (various combinations of UMTS/ LTE/ GSM (GSM-R) are available optionally — one carrier per each input/ output) |
| Optical transceivers connector type | SFP+ |
| Number of optical connectors in FSR/FSC units | 2 |
| Optical connection types | serial connection, parallel connection |
| Number of hops (MWL) | — up to 2 (LTE, LTE/ UMTS, LTE/ UMTS/ GSM) — up to 3 (GSM (GSM-R), UMTS) |
| Number of hops (fiber optic) | 8 and more (depends on the distance between FSC and last FSR in a oDAS chain) |
| Parasitic noise level introduced by the system to integrated MWL, dB | ≤ 2.5 (for maximum number of hops) |
| Operating temperature range, °С | minus 40…+55 |
| Power consumption (with two internal transceivers in FSR unit with 40 dBm output power each), W | — до 160 (FSR + 2 RM) — до 250 (FSR + 2RM + 2SM) — до 80 (FSC +1 RM) — до 120 (FSR) — до 200 (FSR + 2 SM) — до 45 (FSC) |
| Housing protection rating | IP 65 |
| Dimensions (WхDхH), mm: | |
| — FSR | 352x291x197 |
| — FSC | 334х291х197 |
| — RM | 213х128х54 |
| — SM | 220х170х72 |
| Power supply | ~220/110 VAC or -48 VDC (optionally) |
| Weight (with two internal transceivers in FSR unit without fasteners), kg: | |
| — FSR | 11,5 |
| — FSC | 2,3 |
| — RM | 13,5 |
| — SM | 1,7 |
| Certification | ETSI TS 125 106 ETSI TS 136 106 ETSI TS 145 005 ITU-R F.384-11 (03/2012) |
| Control and monitoring | — local (Ethernet, Wi-Fi) — remote (integrated GSM/ UMTS/ LTE modem) |
