The Outdoor Distributed Antenna System RADIUS is intended to provide celullar coverage along railways, roads and rural areas. The system allows increasing network capacity efficiency.
The oDAS RADIUS is designed for integration with LTE FDD, UMTS, GSM (GSM-R) networks, and provides serial distribution of a base station (BTS) sectors (frequency bands) reducing infrastructure cost (CAPEX/OPEX).
The RADIUS FSC is installed at the site with a base station (BTS — RRH or RSU) and receives the GSM-R, GSM, LTE, UMTS carriers from it. Then the module converts them and transmits via MWL or to fiber optic over a distance.
The RADIUS FSR is installed at the remote site. It receives the carriers using MWL or fiber optic and provides creation of remote sectors similar to that of the BTS (one carrier in each sector). In addition, it amplifies and transmits the received signals further along the line to the next site equipped with RADIUS products.
The SM module is designed to generate additional sectors at the site equipped with the 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—7110 |
| 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) | 4 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 | ≤ 3 (for maximum number of hops) |
| Delay, µs | 6 (FSR/FSC) |
| Operating temperature range, °С | minus 40…+55 |
| Power consumption (with two internal transceivers in FSR unit with 40 dBm output power each), W | — up to 200 (FSR + 2 RM) — up to 290 (FSR + 2RM + 2SM) — up to 65 (FSC +1 RM) — up to 140 (FSR) — up to 230 (FSR + 2 SM) — up to 35 (FSC) |
| Housing protection rating | IP 65 |
| Dimensions (WхDхH), mm: | |
| — FSR1 | 408.3x282.1x210.1 |
| — FSC | 408.3х282.1х210.1 |
| — RM | 212х128х96 |
| — SM | 285х152х73 |
| Power supply | ~220/110 VAC or -48 VDC (optionally) |
| Weight (with two internal transceivers in FSR unit without fasteners), kg: | |
| — FSR1 | 14.5 |
| — FSC | 12 |
| — RM | 2.4 |
| — SM | 2.8 |
| 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) |
