- SpaceFibre Routing Switch IP Implementation in Radiation-Tolerant FPGAs 630.43 KBSpaceFibre is a technology specifically designed for use in spaceflight applications that provides point-to-point and networked interconnections at Gigabit rates with Quality of Service and Fault Detection, Isolation and Recovery. SpaceFibre is backwards compatible with SpaceWire, allowing existing SpaceWire equipment to be incorporated into a SpaceFibre network without modifications at packet level.
In this work we present the SpaceFibre Routing Switch IP Core developed by STAR-Dundee and its subsidiary STAR-Barcelona. This IP Core is fully compliant with the SpaceFibre standard – including the Network ayer – thus providing a cornerstone technology necessary for future on-board data-handling systems. We also describe the capabilities and performance of the Routing Switch design. The design provides a highly flexible router comprising a number of ports and a fully configurable, non-blocking, high performance, routing switch. Finally, the implementation results of this Routing Switch IP in radiation-tolerant FPGAs re summarized and discussed. The Routing Switch IP has been carefully implemented to optimise its performance and minimise its footprint on radiation-tolerant FPGAs (e.g. RTG4, Virtex-5QV or KU060) and ASICs.
The SpaceFibre Routing Switch completes the set of essential SpaceFibre technology, providing a missing building block for the next generation of on-board data-handling systems.
- High-Performance, High-Availability and High-Reliability Interconnect for Spaceflight Applications 270.93 KBSpaceFibre is the next generation of SpaceWire network technology for spacecraft on-board data-handling. It runs over electrical or fibre-optic cables, operates at very high data rates, and provides in-built quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities. Its high data rate per lane coupled with novel multi-lane technology enables SpaceFibre to achieve very high performance: in excess of 10 Gbit/s with current space qualified FPGAs and much higher in the near future. Its in-built error detection, isolation and recovery mechanisms enable rapid recovery from transient errors, without loss of data, providing high-availability. Its multi-lane hot and cold redundancy features support high reliability. These capabilities are built into the hardware of each SpaceFibre interface. This paper will outline the quintessential characteristics of SpaceFibre that make it ideal as an interconnect in spaceflight applications. It will then explore how SpaceFibre can be used as a payload data-handling system network.
- SpaceFibre Interfaces and Architectures 427.94 KBSpaceFibre is the next generation of SpaceWire network technology for spacecraft on-board data-handling. It runs over electrical or fibre-optic cables, operates at very high data rates, and provides in-built quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities, providing high-reliability and high-availability. This paper provides an introduction to SpaceFibre and then describes how SpaceFibre can be used as an instrument interface, as the interface and memory interconnection network in a mass-
memory unit, as the interface to a downlink transmitter and as the backplane for a payload processing unit. The paper also describes an overall payload processing architecture based on SpaceFibre and explains how existing SpaceWire equipment can be readily integrated into a SpaceFibre network.
- SpaceFibre Interface and Routing Switch IP Cores 947.44 KBSpaceFibre is a technology specifically designed for use onboard spacecraft that provides point to point and networked interconnections at Gigabit rates with Quality of Service (QoS) and Fault Detection, Isolation and Recovery (FDIR). SpaceFibre is backwards compatible with SpaceWire, allowing existing SpaceWire equipment to be incorporated into a SpaceFibre network without modifications at packet level.
In this work we present the family of SpaceFibre IP Cores developed by STAR-Dundee. It is composed of three different IPs: the Single-Lane Interface, the Multi-Lane Interface and the Routing Switch. The IP Cores are fully compliant with the SpaceFibre standard and have been carefully implemented to optimise their performance and minimise their footprint on radiation-tolerant FPGAs (e.g. RTAX, RTG4, BRAVE or Virtex-5QV) and ASICs. They have also been validated on commercial FPGAs (e.g. Igloo2, Spartan, Virtex, Kintex, etc.).
The Single-Lane Interface IP offers in a compact design (~3% of the RTG4/Virtex-5QV) the maximum possible line rates provided by embedded or external transceivers (i.e. 3.125 Gbps in RTG4, 4.25 Gbps in Virtex-5QV and 2.5 Gbps in RTAX using the TLK2711-SP transceiver). The Multi-Lane Interface IP allows much higher data rates and adds all the advantages of combining multiple lanes without multiplying the resources required (e.g. ~5-6% for 3 lanes in RTG4/Virtex-5QV). The SpaceFibre Routing Switch IP Core is a scalable, fully configurable non-blocking router, allowing to select the number of virtual channels and ports. This routing switch implements path and logical addressing, group adaptive routing, virtual networks, time distribution and message broadcast. A router of 4 ports each with 4 virtual channels typically requires less than 20% of an RTG4, including the SpFi interfaces.
The IP Cores presented in this article provide the building blocks for creating the next generation of onboard networks with in-built QoS and FDIR mechanisms, and are currently being implemented in several missions and products all over the world. We analyse the performance and capabilities of the different IP Cores, and discuss the resources required depending on several parameters such as the number lanes, ports, virtual channels and virtual networks.
- SpaceFibre Camera 897.48 KBSpaceFibre is a high performance, high availability technology for space flight and other demanding applications. The recent generation of image sensors are capable of data rates of several Gbps. SpaceFibre is ideal as an interface to such an image sensor. STAR-Dundee has designed a complete camera, which incorporates a radiation tolerant FPGA for sensor interfacing and control, and image signal processing. This paper introduces SpaceFibre, the Microsemi RTG4 FPGA, the CMV4000 image sensor and describes the complete SpaceFibre camera.
- SpaceVPX-RTG4 Board with SpaceWire or SpaceFibre Backplane 1,015.31 KBSpaceVPX (VITA 78.0) is built on the ruggedized VPX standard. It addresses the need for redundancy in spaceflight systems and focusses on conduction cooled racks. SpaceVPX replaces the VMEbus control-plane of VPX with SpaceWire, while retaining the versatility of a user defined data plane serial interconnect. SpaceVPX-Lite (VITA 78.1) reduces the size and complexity of SpaceVPX. This paper describes a SpaceVPX-Lite board which uses SpaceWire and/or SpaceFibre for its backplane connections. The architecture of board is described along with its configuration options. An example application of the board as a wideband spectrometer is then described.
- Testing SpaceFibre Equipment and Systems 3.98 MBThorough testing is required for successful SpaceFibre equipment and system development. This helps identify defects and provides assurance equipment operates as expected. The STAR Fire Mk3 can transmit and receive SpaceFibre traffic to stimulate and emulate SpaceFibre equipment for test purposes. In addition, it can capture and display SpaceFibre traffic, aiding debug and validation efforts. The SpaceFibre Recorder increases capture functionality further, recording significantly larger quantities of traffic over multiple SpaceFibre lanes. This paper considers how the hardware and software capabilities provided by these units may be used to test SpaceFibre equipment and systems.
- A high Availability, high Reliability SpaceVPX system 417.07 KBSpaceVPX is a backplane standard for demanding, high-reliability applications. Reliability is enhanced in SpaceVPX compared to VPX, by the provision for redundant payload, system controller and power supply modules. Critical signals are run in a point-to-point manner, “radially” out from the nominal and redundant system controller modules to the several payload modules. Communication functions are isolated from one another using several planes: data plane, control plane, management plane and utility plane. SpaceFibre is a high-availability, high-reliability, high-performance serial communication standard, which provides multiple virtual channels over each communication link. These virtual channels are isolated from one another and each has configurable quality of service (QoS). SpaceFibre provides multi-lane communication with graceful degradation in performance if a lane fails. Hot and cold redundancy can be provided within a multi-lane link with very fast (2 µs) detection and recovery from failures. The full paper introduces SpaceVPX and SpaceVPX-Lite and then outlines the key features of SpaceFibre. It then explains how a single communications plane can replace the data, control and management plane in SpaceVPX to advantage: reducing power consumption, reducing complexity, increasing availability and enhancing reliability.
- SpaceFibre Image Sensor and Data Processing Units 589.82 KBThe latest and next generations of spacecraft synthetic aperture radar and high-resolution image instruments will provide very high data-rates on-board a spacecraft, in excess of 10 Gbps. SpaceFibre is the next generation of SpaceWire network technology for spacecraft on-board data-handling. It runs over electrical or fibre-optic cables, operates at very high data rates, and provides in-built quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities. This paper describes three SpaceFibre based units: an image sensor, an FPGA based processor and a many-core DSP processor. Equipped with SpaceFibre interfaces they demonstrate the ease with which SpaceFibre can be deployed on future space missions.
- A Wideband Spectrometer in the Microsemi RTG4 FPGA 1.12 MBA high-performance FFT processor for spectrometer applications in space has been designed, implemented and tested. The wideband spectrometer five (WBS V) implements a 1 k-point FFT in a Microsemi RTG4. Operating with dual 2.4 Gsamples/s ADCs it provides 2 GHz bandwidth with a FFT bin size of 2.4 MHz. The architecture, implementation and results of this spectrometer are described.
- SpaceFibre network and routing switch 653.84 KBSpaceFibre is the next generation of the widely used SpaceWire technology for spacecraft on-board data-handling applications. SpaceFibre provides much higher performance, has integrated quality of service and fault detection, isolation and recovery capabilities. It runs over electrical or fibre optic media and is able to operate over distances of up to 5 m over electrical cables and 100 m over fibre optic cables. The SpaceFibre network layer uses the same packet format and routing concepts as SpaceWire, enhancing them with the concept of independent, parallel virtual networks, each of which operates like an independent SpaceWire network running over a single physical network. An essential component in a SpaceFibre network is the routing switch. STAR-Dundee has designed, built and tested a SpaceFibre routing switch in a commercial FPGA, using it to support the testing and validation of the network layer concepts developed for SpaceFibre. The architecture of the SUNRISE router is described and current work transferring this design to radiation tolerant technology is outlined.
- A prototype SpaceVPX lite (VITA 78.1) system using SpaceFibre for data and control planes 399.98 KBSpaceVPX (VITA78.0) is a new development in the area of standard backplanes for spacecraft applications, which addresses the key issue of fault tolerance. SpaceVPXLite (VITA78.1) is a derivative of SpaceVPX which is aimed at small size. SpaceFibre is the next generation of the widely used SpaceWire on-board network technology. SpaceFibre runs at multi-Gbits/s over both electrical and fibre-optic cables. SpaceFibre is capable of fulfilling a wide range of spacecraft on-board communications applications because of its inbuilt quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities. SpaceFibre is being incorporated in the SpaceVPXLite standard as a protocol for sending information over a backplane. STAR-Dundee is developing a demonstration system of SpaceFibre in SpaceVPXLite, using the Microsemi RTG4 radiation tolerant FPGA. This demonstration system is being used as the engineering model of a UK THz radiometer instrument processing unit.
- SpaceFibre: Capabilities, Components and Kit 708.16 KBSpaceFibre is the next generation of SpaceWire network technology for spacecraft on-board data-handling. It runs over electrical or fibre-optic cables, operates at very high data rates, provide in-built quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities. This paper introduces SpaceFibre, describes its position as a state-of-the-art network technology for space applications, details it principal capabilities, introduces some of the SpaceFibre components that are available now or will be in the near future, and describes the SpaceFibre test and development equipment available from STAR-Dundee.
- SpaceFibre multi-lane 1.75 MBSpaceFibre is a multi-Gbits/s, on-board network technology for spaceflight applications, which runs over electrical or fiber-optic cables. SpaceFibre supports multi-lane, thus allowing data to be sent over several individual physical lanes to enhance throughput and robustness. This is required by new generation payloads, such as SAR and multi-spectral imaging instruments. This paper describes the development of the multi-lane capabilities of SpaceFibre and its successful hardware implementation on space-qualified devices. The protocol has been designed to work with an arbitrary number of bidirectional or unidirectional lanes. In the event of a lane failing, SpaceFibre multi-lane mechanism supports hot redundancy and graceful degradation by automatically spreading traffic over the remaining working lanes. User data transfer is resumed in just a few microseconds without any data loss. These advanced capabilities are not provided in other high-speed link protocols available for space applications.
- A new generation of SpaceFibre test and development equipment 921.66 KBSpaceFibre is a new technology for use onboard spacecraft that provides point-to-point and networked interconnections at Gigabit rates with in-built Quality of Service and Fault Detection, Isolation and Recovery. The SpaceFibre standard is virtually finished, with the ECSS standardisation activity to be ended this year. There is a need for equipment to support the development and testing of applications of the entire protocol stack. This paper describes the new generation of SpaceFibre equipment designed for this purpose. They provide users with several options for platforms and connectors, such as FMC, USB 3.0, cPCI, PXI, PXIe and SpaceVPX. The number of platforms supported and the flexibility of the equipment provides the end user with a broad range of options to include SpaceFibre in their current system design. This helps to promote the adoption of SpaceFibre technology. A number of designs using the equipment here described is currently available or under development. They include the SUNRISE SpaceFibre Router and the Multilane SpaceFibre interface, among others. When combined, these new boards and designs offer a powerful and rich set of tools to help with SpaceFibre designs.
- SpaceFibre networks 1.21 MBSpaceFibre  is the next generation of SpaceWire  on-board data-handling network technology for spaceflight operations, which runs over both electrical and fibre optic media. SpaceFibre has many benefits compared to SpaceWire, including much higher data-rates, integrated quality of service, fault recovery capabilities, multi-laning with graceful degradation and hot and cold redundancy, and low-latency broadcast messages that can carry 8-bytes of user information. Importantly SpaceFibre is backwards compatible with SpaceWire at the network level, allowing existing SpaceWire equipment to be incorporated into a SpaceFibre network without modification. SpaceFibre networks have been defined by the University of Dundee and STAR-Dundee, and incorporated in the network layer definition of the current draft SpaceFibre standard. STAR-Dundee has designed a SpaceFibre routing switch to evaluate various routing concepts, validate the standard specification and demonstrate a complete SpaceFibre network. A demonstration system has been built and key parts of the SpaceFibre network technology have been demonstrated.
- SpaceFibre flight equipment 1.50 MBSpaceFibre is a new standard for spacecraft on-board data-handling networks, which runs over both electrical and fibre optic media. It provides high bandwidth, low latency, fault recovery and novel QoS that combines priority, bandwidth reservation and scheduling. SpaceFibre is backwards compatible with SpaceWire at the network level, allowing existing SpaceWire equipment to be incorporated into a SpaceFibre network without modification. SpaceFibre is now being designed into its first spaceflight missions. This paper describes SpaceFibre flight equipment being designed by STAR-Dundee for space flight applications. This includes a range of SpaceFibre IP cores targeted at radiation tolerant FPGAs and the SpaceFibre interfaces in a radiation tolerant many core DSP processor.
- SpaceFibre link analysis 1.00 MBFor those responsible for the design and implementation of a SpaceFibre network it is essential to be able to capture and view the traffic on a SpaceFibre link in order to help validate the link is operating as expected and debug the link should any unexpected behaviour be observed. STAR-Dundee Ltd have developed hardware independent SpaceFibre Link Analyser software for this purpose. This paper describes how the software views, combined with the traffic capture capabilities of the STAR Fire unit, can be used to perform SpaceFibre link analysis.
- SpaceWire and SpaceFibre on the Microsemi RTG4 FPGA 987.46 KBSpaceWire is a spacecraft on-board data-handling network which connects instruments to the mass-memory, data processors and control processors, which is already in orbit or being designed into more than 100 spacecraft. SpaceFibre is a new, multi-Gbits/s, on-board network technology, which runs over both electrical and fibre-optic cables. SpaceFibre is capable of fulfilling a wide range of spacecraft on-board communications applications because of its inbuilt quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities.
The Microsemi RTG4 is a new generation radiation tolerant FPGA. It has extensive logic, memory, DSP blocks, and IO capabilities and is inherently radiation tolerant, having triple mode redundancy built in. The RTG4 has a flash configuration memory built into the device. In addition the FPGA incorporates 16 SpaceWire clock-data recovery circuits and 24 multi-Gbits/s SerDes lanes to support high-speed serial protocols like SpaceFibre.
STAR-Dundee has implemented SpaceWire and SpaceFibre IP cores using the Microsemi RTG4 Development Kit. The flight proven SpaceWire IP core was initially run at over 200 Mbits/s and the SpaceFibre IP core at 2.5 Gbits/s. With a little more work it is expected to reach 300 Mbits/s and 3.125 Mbits/s respectively. The SpaceWire IP core takes around 1% of the FPGA and the SpaceFibre IP core around 3-5% depending on the number of virtual channels supported. The use of the RTG4 with the SpaceWire and SpaceFibre IP cores provides a powerful platform for future spacecraft on-board instrument control, data-handling, and data processing. Furthermore the advanced QoS and FDIR capabilities of SpaceFibre make it suitable for a wider range of spacecraft onboard applications including integrated payload data-handling and attitude and orbit control networks and launcher applications where deterministic data delivery is required.
This paper reports on the implementation and testing of the SpaceWire and SpaceFibre IP cores in the Microsemi RTG4 FPGA.
- Spacefibre: The standard and the multi-lane layer 249.12 KBSpaceFibre is a new standard for spacecraft on-board data-handling networks, initially designed to deliver multi-Gbit/s data rates for synthetic aperture radar and high-resolution, multi-spectral imaging instruments, The addition of quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities to SpaceFibre has resulted in a unified network technology. SpaceFibre provides high bandwidth, low latency, fault isolation and recovery suitable for space applications, and novel QoS that combines priority, bandwidth reservation and scheduling and which provides babbling node protection. SpaceFibre is backwards compatible with the widely used SpaceWire standard at the network level allowing simple interconnection of existing SpaceWire equipment to a SpaceFibre link or network.
Developed by STAR-Dundee and the University of Dundee for the European Space Agency (ESA) SpaceFibre is able to operate over fibre-optic and electrical cable. A single lane of SpaceFibre comprises four signals (TX+/- and RX+/-) and supports data rates of 2 Gbits/s (2.5 Gbits/s data signalling rate) with data rates up to 5 Gbits/s already planned.
Several lanes can operate together to provide a multilane link. Multi-laning increases the data-rate to well over 20 Gbits/s.
This paper details the current state of SpaceFibre which is now in the process of formal standardisation by the European Cooperation for Space Standardization (ECSS). The multi-lane layer of SpaceFibre is then described.
- Sunrise: A spacefibre router 502.45 KBSpaceFibre is a new generation of SpaceWire technology which is able to support the very high datarates required by sensors like SAR and multi-spectral imagers. Data rates of between 1 and 16 Gbits/s are required to support several sensors currently being planned. In addition a mass-memory unit requires high performance networking to interconnect many memory modules. SpaceFibre runs over both electrical and fibre-optic media and provides and adds quality of service and fault detection, isolation and recovery technology to the network. SpaceFibre is compatible with the widely used SpaceWire protocol at the network level allowing existing SpaceWire devices to be readily incorporated into a SpaceFibre network. SpaceFibre provides 2 to 5 Gbits/s links (2.5 to 6.25 Gbits/s data signalling rate) which can be operated in parallel (multi-laning) to give higher data rates. STAR-Dundee with University of Dundee has designed and tested several SpaceFibre interface devices.
The SUNRISE project is a UK Space Agency, Centre for Earth Observation and Space Technology (CEOIST) project in which STAR-Dundee and University of Dundee will design and prototype critical SpaceFibre router technology necessary for future on-board data-handling systems. This will lay a vital foundation for future very high data-rate sensor and telecommunications systems.
This paper give a brief introduction to SpaceFibre, explains the operation of a SpaceFibre network, and then describes the SUNRISE SpaceFibre Router. The initial results of the SUNRISE project are described.
- SpaceFibre: A multi-Gigabit/s interconnect for spacecraft onboard data handling 3.23 MBSpaceFibre is a spacecraft onboard data link and network technology being developed by University of Dundee for the European Space Agency (ESA), which runs over both copper and fibre optic cables. Initially targeted at very high data rate payloads such as Synthetic Aperture Radar (SAR) and multi-spectral imaging instruments, SpaceFibre is capable of fulfilling a wider set of spacecraft onboard communications applications because of its inbuilt QoS and FDIR capabilities and its backwards compatibility with the ubiquitous SpaceWire technology. SpaceFibre operates at 2.5 Gbits/s providing 12 times the throughput of a SpaceWire link with current flight qualified technology and allowing data from multiple SpaceWire devices to be concentrated over a single SpaceFibre link. This substantially reduces cable harness mass and simplifies redundancy strategies. The innovative QoS mechanism in SpaceFibre provides concurrent bandwidth reservation, priority and scheduled QoS. This simplifies spacecraft system engineering through integrated quality of service (QoS), which reduces system engineering costs and streamlines integration and test. Novel integrated FDIR support provides galvanic isolation, transparent recovery from transient errors, error containment in virtual channels and frames, and “Babbling Idiot” protection. SpaceFibre enhances onboard network robustness through its inherent FDIR and graceful degradation techniques incorporated in the network hardware. This simplifies system FDIR software, reducing development and system validation time and cost. SpaceFibre includes low latency event signalling and time distribution with broadcast messages. This enables a single network to be used for several functions including: transporting very high data rate payload data, carrying SpaceWire traffic, deterministic delivery of command/control information, time distribution and event signalling. SpaceFibre is backwards compatible with existing SpaceWire equipment at the packet level allowing simple interconnection of SpaceWire devices into a SpaceFibre network and enabling that equipment to take advantage of the QoS and FDIR capabilities of SpaceFibre.
- VHiSSI: Experimental SpaceFibre ASIC 640.35 KBSpaceFibre is the next generation data link and network technology being developed by University of Dundee for the European Space Agency. This high-speed technology runs over both copper and fibre optic cables and is backwards compatible with the ubiquitous SpaceWire technology. SpaceFibre provides 12 times the throughput of a SpW link (2.5 Gbps) with current flight qualified technology together with inbuilt QoS and FDIR capabilities.
This paper details the first implementation of SpaceFibre in a radiation tolerant device in the frame of the VHiSSI project. The functionality of this ASIC chip is explained and the results of the functional and Total Ionising Dose and Single Event Effect radiation testing are detailed.
- SpaceFibre: The Standard, Simulation, IP Cores and Test Equipment 487.19 KBSpaceFibre is an emerging new standard for spacecraft on-board data-handling networks. Initially targeted to deliver multi-Gbit/s data rates for synthetic aperture radar and high-resolution, multi-spectral imaging instruments, SpaceFibre has developed into a unified network technology that integrates high bandwidth, with low latency, quality of service (QoS) and fault detection, isolation and recovery (FDIR). Furthermore SpaceFibre is backwards compatible with the widely used SpaceWire standard at the network level allowing simple interconnection of existing SpaceWire equipment to a SpaceFibre link or network.
Developed by the University of Dundee for the European Space Agency (ESA) SpaceFibre is able to operate over fibre-optic and electrical cable and supports data rates of 2 Gbit/s in the near future and up to 5 Gbit/s long-term. Multi-laning improves the data-rate further to well over 20 Gbits/s.
This paper details the current state of SpaceFibre which is now in the process of formal standardisation by the European Cooperation for Space Standardization (ECSS). It describes the SpaceFibre IP core being developed for ESA along with the design of an experimental SpaceFibre ASIC. The design of a SpaceFibre demonstration board is introduced and available SpaceFibre test and development equipment is described. The way in which several SpaceWire links can be concentrated over a single SpaceFibre link will be explained.
- Integrating STAR-Dundee SpaceFibre Codec with TI TLK2711 2.39 MBThe SpaceFibre Codec IP (beta version) was released by STAR-Dundee at the end of 2013. The SpaceFibre standard and the codec IP are designed in the way that it shall work with TI TLK2711-SP - a space qualified SERDES device . This paper presents the work where the Codec IP and the TLK2711 are used to implement a SpaceFibre link. Firstly the SpaceFibre Codec and the TLK2711 device are introduced, especially the power-on reset and signal detection operations of the TLK2711 for they are fundamental for the SpaceFibre link. Experiments on link initialisation are presented with results and analysis.
- SpaceFibre implementation, test and validation 1.08 MBSpaceFibre is a multi-gigabit/s data link and network technology for use onboard spacecraft. Compatible with SpaceWire at the packet level, SpaceFibre runs over electrical and optical media. It provides extensive quality of service (QoS) and fault detection, isolation and recovery (FDIR) capabilities that are designed specifically for spacecraft applications. This paper provides a short introduction to SpaceFibre and then describes how SpaceFibre is being implemented. It introduces some SpaceFibre test equipment and explains how SpaceFibre has been validated. SpaceFibre is designed to support high data rate payload data-handling like synthetic aperture radar (SAR), multi-spectral imaging systems and fast mass memory. It is an ideal candidate for the next generation of spacecraft interconnect, being an open standard designed specifically for spacecraft applications.
- SpaceFibre Implementation, Test and Validation 357.41 KBSpaceFibre is a very high-speed serial data-link being developed by the University of Dundee for the
European Space Agency (ESA) which is intended for use in data-handling networks for high data-rate
payloads. SpaceFibre is able to operate over fibre-optic and electrical cable and supports data rates of 2 Gbit/s
in the near future and up to 5 Gbit/s long-term. It aims to complement the capabilities of the widely used
SpaceWire onboard networking standard: improving the data rate by a factor of 12.5, reducing the cable
mass and providing galvanic isolation. Multi-laning improves the data-rate further to well over 20 Gbits/s.
This paper provides an introduction to SpaceFibre and then describes the work being done by various
organisations to simulate, implement, test and validate SpaceFibre.
- SpaceFibre: Adaptive high-speed data-link for future spacecraft onboard data handling 349.75 KBSpaceFibre is a high-speed data-link technology being developed by the University of Dundee for ESA to support spacecraft onboard data-handling applications. SpaceFibre operates at 2.5 Gbits/s, can run over fibre optic or electrical media, provides galvanic isolation, includes Quality of Service (QoS) and Fault Detection Isolation and Recovery (FDIR) support, and provides low-latency signalling. It operates over distances of 5m with copper cable and 100 m or more with fibre optic cable. SpaceFibre supports multiple virtual channels running over a single physical link. QoS capabilities built into the SpaceFibre hardware allow the bandwidth and priority of each virtual channel to be specified. Traffic flow over each virtual channel then adapts automatically taking into account virtual channels that have data ready to send and available buffer space at the far end of the link, along with link bandwidth and priority allocation. The novel QoS mechanism is simple but powerful and also allows the automatic detection of “babbling idiots” and virtual channels that are sending much less data than expected. After a brief introduction the SpaceFibre QoS and FDIR capabilities are explained. The approach taken in validating the SpaceFibre protocols and current status of the SpaceFibre development activities are then described.