HELIOS^® M-DOTS™ Digital CPRI Hybrid & Active DAS

For Multi-Band & Multi-Operator & Multi-Technology

Next-Generation, Fiber-to-Antenna & Fiber-to-Edge Active DAS Platform

As 5G technology becomes more pervasive worldwide, consumers and business professionals alike expect mobile service with faster speeds, better coverage, and higher quality — anytime and anywhere — including in your building or event venue. By installing the latest distributed antenna system (DAS) technology, you can help ensure that your tenants, visitors, and employees continue to enjoy seamless in-building connectivity. Evolution to 5G promises more capacity and data speed, but to deliver on that promise, the 3GPP has introduced an array of new frequency bands with varying propagation characteristics. Additionally, next-generation mobile technology enables new features and capabilities, such as ultra-reliable low-latency networks, which require substantial changes in network architecture. All of this means that 5G brings increasing complexity to today’s networks.

Helios^® Next-Generation Multi-Band & Multi-Operator & Multi-Technology Digital Optical Transport System (M-DOTS™) is the most flexible, scalable and complete hybrid & active DAS solution for addressing coverage and capacity needs for cellular and public safety wireless network. The M-DOTS™ improves wireless network coverage and capacity by extending services from existing cell sites to hard-to-reach areas by digital CPRI distributing coverage from a centralized radio suite.

Utilizing a centralized digital CPRI distributed architecture, Helios^® M-DOTS™ is a three-tier architecture consisting of the Radio Access Unit (RAU), CPRI HUB Unit and Active Antenna Units (AAUs) / Macro Remote Radio Units (mRRUs). RF signals from sectorized Base Stations, off-air Repeater, BDAs or combination thereof can be received. In the case of off-air feed, the RAU has the option as Wireless-Access RAU to combine the functions of the off-air Repeater and provide transmission and distribution of radio signals. The signal is filtered and then converted to a digital CPRI data stream. The digital CPRI packet data stream is transported via single mode fiber and received by the remote AAU or Macro RRUs. The AAU/mRRUs then convert the digital CPRI packet data stream back to RF and amplify the signal for delivery to the antennas. On the reverse path (uplink), the AAU/mRRUs and RAU perform the inverse functions and delivery the signals back to the corresponding off-air antenna, BDAs or Base Stations.

The all-digital platform with ultra-wide bandwidth RF front-end design and modular architecture enables multiple band/technologies/operator and network topologies including star, chain and hybrid to cater to different deployment scenarios. These network topologies provide reduced fiber plant usage and installation cost, and effective fiber loop redundancy configurations.

The M-DOTS™ flexibility and scalability offers service provider an optimal solution for multiple applications, such as dense urban centers, dense suburban areas, airports, hospital, campuses, enterprise buildings, subways and tunnels. The M-DOTS™ digital CPRI distributed architecture and small form factor allow service providers or neutral host to cost-effectively increase coverage and capacity in these hard-to-reach areas.

The 19" rack-mountable M-DOTS™ Direct-Coupled Type RAU (Radio Access Unit) is typically located at a sectorized Base Station or a facility housing a suite of sectorized Base Stations. On the forward path, the RAU receives the RF signals from the sectorized BTS via Directional Coupler or Coaxial Attenuator and digitizes the designated RF bands and digitally transports them over single mode fiber to the distributed AAU/mRRUs. On the reverse path, the RAU receives the digitized RF signals from the remote AAU/mRRUs and converts them back to RF for the Donor BTS.

With ultra-wide bandwidth RF front-end design enables each M-DOTS™ RAU supports up to three RF bands with 2T2R MIMO. All each RF band can be configured to be FDD or TDD mode in factory and supports up to 400MHz bandwidth RF signals in order to be capable of simulcasting signals for multiple bands/technologies/operators and MIMO, even ultra-wide bandwidth requirement for Sub-6GHz 5G NR TDD. Each M-DOTS™ RAU has four 10Gbps SFP+ Digital Optic Ports and supports up to 64 AAU/mRRUs via adding CPRI HUBs by star, chain, ring and hybrid network topologies in some large-scale scenarios, such as airport, high-way, subways, tunnels, campuses and railway station.

The RAU utilizes an embedded central WEB management portal for system configuration and network monitoring. The embedded central WEB management portal collects alarm information from both RAUs and AAU/mRRUs.

• 19" 1.5HU stackable rack-mounted design
• Support up to customized three RF Bands with 2T2R MIMO design within LTE BAND 1, 3, 7, 8, 20, 28 and 5G NR N38, N77, N78, N41, N79
• Full digital software and hardware platform with Ultra-wide RF front-end design and enables up to 3 * 2T2R RF path and each RF path supports maximum 100MHz bandwidth to meet the potentially huge bandwidth demand while ensuring superb 5G services
• Ultra-wide RF bandwidth (400MHz DL and 400MHz UL on one fiber core, dual cores double to 800MHz DL and 800MHz UL) adaptable to all Global Communications Bands, 2T2R and 4T4R MIMO, now and future 5G NR
• Patented 5G NR TDD synchronization algorithms based on SDR technique
• RJ-45 Port as LAN port to support IP Web Browser GUI for Local Control
• Each RAU has four 10Gbps SFP+ Ports and supports up to 32 AAU/mRRUs by star, chain, ring and hybrid network topologies, even up to 64 AAU/mRRUs by adding CPRI HUBs in some large-size scenarios, such as airport, high-way, subways and tunnels.
• Support up to 8hops between RAU and last AAU/mRRU
• Support remote monitoring by SMS or Data Link via external 5G or 4G Router/DTU/RTU (Option)
• Real-time automatic measure & align & compensate the optic delay between RAU and each AAU/mRRU
• Details repeater parameters and status can be monitoring by built-in web interface, such as RSSI, temperature, channels switch, optic link, TDD UL/DL Setting, PA switch, output power level, gain, ATT, return loss, VSWR etc.
• iBwave VEX component files are available for your in-building wireless and fiber network design and deployment projects
• SNMP V2 & V3 support with a MIB File

The M-DOTS™ Outdoor Roof-Top Wireless-Access Type RAU (Radio Access Unit) is combine the functions of the off-air Repeater and it generally accesses & synchronize outdoor 2G/3G/4G/5G signals on air via external MIMO donor antenna, the signal is filtered, amplified and then converted to a digital CPRI data stream as well as synchronization signal. The digital CPRI packet data stream is transported via single mode fiber and received by the indoor remote Single-Band/Dual-Band/Tri-Band AAUs or mRRU via indoor M-DOTS™ CPRI HUB.

With ultra-wide bandwidth RF front-end design enables each M-DOTS™ RAU supports up to three RF bands with 2T2R MIMO. All each RF band can be configured to be FDD or TDD mode in factory and supports up to 400MHz bandwidth RF signals in order to be capable of simulcasting signals for multiple bands/technologies/operators and MIMO, even ultra-wide bandwidth requirement for Sub-6GHz 5G NR TDD. Each M-DOTS™ RAU has two 10Gbps SFP+ Digital Optic Ports and supports up to 196 AAU/mRRUs via adding CPRI HUBs by star, chain, ring and hybrid network topologies in some large-scale scenarios, such as airport, high-way, subways, tunnels, campuses and railway station.

Patented Multi-Operator 5G NR TDD synchronization algorithms based on SDR technique enables accurate, speedy and reliable frame synchronization with up to four 5G N78 TDD telecom operator’s gNB simultaneously and working in harmony with macro network.

Innovative Power Over Fiber (PoF) features for outdoor roof-top Wireless-Access Type RAU to enable flexible & simplifies installation for RAU through hybrid fiber-copper cable and save total CAPEX cost for original two parallel 2*2 MIMO feeder cable system from device to Donor Antenna on top of tower.

Helios® M-DOTS™ AAUs then convert the digital CPRI packet data stream back to RF and control the switcher to DPD PA based on synchronization signal from RAU, then amplify the signal to the embedded 2T2R or 4T4R MIMO services antennas. On the reverse path (uplink), the AAUs and RAU perform the inverse functions and delivery the signals back to the corresponding 4G & 5G Base Stations.

Innovative Power-over-Fiber (PoF) feature enables flexible & simplifies installation for AAU through fiber, and all AAU adopts compact & fashion design with very low power consumption, typical mounting options include pole-mount, wall-mount and ceiling-mount.

• Support Single-Band 5G NR 4T4R or Dual-Band LTE 2T2R + 5G NR 2T2R or even up to Tri-Band 4G LTE 2T2R + 5G NR 2T2R together
• Compact & Fashion distributed Single-Band/Dual-Band/Tri-Band AAU design embedded 2T2R or 4T4R MIMO omni-directional Service Antenna for wall-mount, pole-mount and ceiling-mount
• Full digital software and hardware platform with Ultra-wide RF front-end design and enables 4T4R RF path or 2 * 2T2R RF path (Single-Band or Dual-Band version) or 2 * 4T4R RF path or 3 * 2T2R RF path (Tri-Band version) and each RF path supports maximum 100MHz bandwidth to meet the potentially huge bandwidth demand while ensuring superb 5G services
• Ultra-wide RF bandwidth (400MHz DL and 400MHz UL on one fiber core, dual cores double to 800MHz DL and 800MHz UL) adaptable to all Global Communications Bands, 2T2R and 4T4R MIMO, now and future 5G NR
• RF composite DL Output power up to +24dBm per port
• DPD, CFR, and AGC for better sensitivity and communication quality and very low power consumption to save total CAPEX & OPEX cost
• Low modulation EVM, ALCR, and spurious emission
• Innovative Power-over-Fiber (PoF) feature enables flexible & simplifies installation by star topology both for outdoor roof-top RAU and indoor Distributed AAUs
• Digital optical path fault auto-detection
• RJ-45 Port for Local Control and Alarming on an IP Web Browser GUI
• iBwave VEX component files are available for your in-building wireless and fiber network design and deployment projects
• SNMP V2 & V3 support with a MIB File

Helios® M-DOTS™ CPRI HUB Unit is an indoor expansion element in Helios® M-DOTS™ Active & Hybrid Indoor DAS solution, it can be deployed remotely or co-located with the RAU, and it owns eleven 10Gbps SFP+ optical ports to provide expandable connectivity up to 8 indoor Distributed Active Antenna Units (AAUs) over hybrid fiber-copper cable based on CPRI protocol or Macro Remote Radio Unit (mRRU) via standard single-mode fiber based on CPRI protocol by star topology for coverage needs. It receives the CPRI data from RAU and transmits to the Distributed AAU/mRRUs after shunting, the uplink CPRI data stream from AAU/mRRUs will be sent to the RAU after routing processing. It’s also able to provide innovative Power Over Fiber (PoF) features for indoor remote Distributed lower power AAUs to enable flexible & simplifies installation both for RAU and AAUs through hybrid fiber-copper cable.