LinkWay DVB S2
ViaSat Linkstar S2 is the latest advanced satellite transmission technique from DVB, improving on and expanding the range of applications possible with DVBs tried
and trusted DVB-S. 
LinkWayS2 is a hubless MF-TDMA VSAT system that enables you to costeffectively integrate a variety of applications into a single platform in any network topology – mesh, star, or multi-star. Adaptive on-demand bandwidth allocation and bandwidth-efficient coding and modulation engineered into the LinkWayS2 system gives you cost-effective broadband connections between any LinkWay®- equipped sites. Features such as turbo coding and 8PSK modulation provide substantial bandwidth savings, reducing your transponder costs compared with other solutions.
The system provides true network-centric connectivity, integrating seamlessly with your networking applications using IP or frame relay, automatically routing your network data via satellite. IP and frame relay are supported natively on the same platform and in the same network simultaneously, maximizing your networking options.
The LinkWayS2 terminal includes an integrated DVB-S2 receiver/decoder which can receive a broadband IP data stream from a DVB-S2 hub, providing efficient broadband star connectivity to a central data source while simultaneously providing full-mesh capability. The LinkWayS2 system, for example, can support bandwidth-intensive IP applications such as streaming video over the DVB-S2 link while supporting intrinsically mesh applications such as VoIP over mesh TDMA. Also, the terminal is now interoperable with ViaSat’s LinkStarS2 system, providing a universal, flexible networking solution.
DVB-S2 is the latest advance in transmission technique from the Digital Video Broadcasting Project industry consortium and features a variety of technology enhancements over the current DVB-S standard. The new standard is designed to cut the cost-per-bit to transmit data by satellite by providing more efficient use of satellite transponders.
ViaSat has a full line of VSAT products for data and voice applications, and is a market leader in Ka-band satellite systems, from user terminals to large gateways.
ViaSat Modem
The LinkWayS2 system can be used over any fixed satellite on any satellite radio frequency band. Combined with the appropriate RF equipment, the LinkWayS2 terminal can operate on C-band, Ku-band, Ka-band, or X-band – on loop-back, split-beam, or cross-strapped transponders. LinkWayS2 can operate on up to 64 non-contiguous satellite carriers, allowing access to any available bandwidth on any transponder on the satellite, for optimal use of costly satellite resources.
An Advanced VSAT Networking Technology
ViaSat continues to offer the most innovative satellite networking products with its LinkWayS2 system. The LinkWayS2 terminal builds upon and expands the capabilities of the successful LINKWAY 2100, assuming the LINKWAY 2100’s place as the world’s most advanced mesh TDMA system.
LinkWayS2 uses a revolutionary new mesh TDMA modem design. Turbo coding provides quasi-error-free connections with minimal carrier power requirements. 8PSK modulation provides dramatically improved spectral efficiency. Combined with an improved, shorter TDMA preamble, LinkWayS2 is up to 40% more efficient than convolutional-encoded Reed-Solomon systems, increasing throughput, reducing station size, and reducing satellite bandwidth requirements.
The LinkWayS2 terminal provides more choices of carrier rate than the LINKWAY 2100, with any rate from 156Ksps to 5Msps in 156Ksps steps, enabling system operators to select the optimum carrier rate for their particular network traffic profile. With efficient TDMA operation at lower symbol rates, this terminal provides an excellent solution for low-throughput applications, such as voice. With carrier rates up to 5Msps, the LinkWayS2 also handles high-throughput applications, such as video or large media file transfers.
the LinkWayS2 is a mesh MF-TDMA modem with completely independent fast-hopping transmit and receive sections. The transmit modulator and receive demodulator can each tune on a burst-to-burst basis, independently and automatically, to any of 64 carriers across an 800 MHz frequency range spanning multiple transponders, multiple carrier rates, multiple carrier coding rates, and multiple carrier modulations. This allows the most efficient allocation of bandwidth on the network carriers, on any available timeslot on any available carrier frequency, for the most flexible and frequency-agile system available.
LinkWayS2’s DVB-S2 receiver, with EN 302 307-compliant coding, provides bandwidth-efficient broadband download capability to the LINKWAY system. The DVB-S2 coding scheme is so advanced, it may represent the last major development in high-speed satellite modem design. With higher throughput at lower Eb/No than other systems, it enables broadband connections into reduced size stations. Operators may use LinkWayS2 with a standard EN 302 307 DVB-S2 modulator and IP encapsulator or with ViaSat’s LinkStarS2 hub.
LinkWayS2 Terminal Description
The IDU (Indoor Unit) contains one integrated IP port and one integrated frame relay serial port. Additional IP and frame relay ports may be added using the two expansion slots available on the IDU. Frame relay capability may also be expanded via an attached peripheral frame relay access device. IP ports and capabilities may also be expanded via a peripheral ethernet switch or router.
The terminal is designed for stand-alone operation, requiring no local operator control. Configuration and monitoring of remote sites is done over-the-air via the LINKWAY Network Management System (NMS), or via telnet. The IDU also includes a console interface port for unit installation.
The IDU features an extended 950-1750 MHz L-band interface to the radio frequency transceiver (RFT), for operation across multiple RF bands limited only by the capability of RFT. The built-in DVB-S2 receiver uses the same L-band receive interface as the TDMA mesh modem for a simple, clean design.
The complete LinkWayS2 VSAT terminal includes an RFT consisting of C- or Ku-band radio equipment and an antenna. Typical radio transmit powers are 2, 4, 8, and 16 Watts in Kuband, and 5, 10, and 20 Watts in C-band.
S2 VSAT DVB Terminals
S2 SDVB VSAT Systems
LinkWay and Linkstar.
The LinkStarS2 and LinkWayS2 systems bring you an unparalleled combination of satellite communications technology, advanced IP routing, quality of service, data acceleration, and compression in two complementary platforms. Your IP applications will seamlessly integrate via satellite through the use of industry standards such as DVB-S, DVB-S2, and DVB-RCS.
Enterprise applications benefit most from the hub-spoke (star) LinkStarS2 system, while the LinkWayS2 system is best for applications requiring single-hop, mesh connections directly between remote sites.
Efficient networking performance
Built-in TCP and HTTP Acceleration Built-in CIR-on-Demand By Application and true Application-QoS MF-TDMA return channel Bandwidth allocation with only 0.5 second lag between a request for capacity and its assignment Automatic End-to-End Uplink Power Control for higher network availability Adaptive Inbound Channel provides industry leading reliability and availability of the network
iDirect Satellite Modem Router Specification
| Technical Specifications |  |
|---|---|
| Technical Specifications: | |
| Operating Frequency: | 1616 - 1626.5 MHz, L-Band |
| Duplexing Method: | Time Division Duplex(TDD) |
| Multiplexing Method: | TDMA/FDMA (GSM) |
| Link Margin: | 15.5 dB average |
| Average Power: | 0.57 Watts average |
| CEIRP Average: | -1.9 dBW |
| Sensitivity: | -117.9 dBm |
| TX Spurs General EIRP: | -60 dBW |
| TX Spurs GNSS 1559-1605 MHz: | -80 dBW |
| TX Noise GNSS 1559-1650 MHz: | -70 BW/MHz |
| Standard Battery Life : | |
| Continuous Talk Time: | Up to 2hrs (3.2 hours with the optional High Capacity Battery or 5.5 hrs with the optional Ultra High Capacity Battery) |
| Standby Time: | Up to 16hrs (24 hours with the optional High Capacity Battery or 48 hrs with the optional Ultra High Capacity Battery) |
| Mechanical & Environmental: | |
| Weight: | Under 454g (16oz) |
| Dimensions: | 7.60"L x 2.44"W x 2.66 "D (193mm L x 62mm H x 68mm D) |
| Operating Temperature: | -30ºC - 60ºC |
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Documentation and Manuals
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ViaSat High-Speed Satellite Internet Terminal
Data Sheet
(PDF, 867K)
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Linkstar and LinkWay S2 Data Sheet
