2005
Conference article
Unknown
Resource partitioning and call admission control in a rain faded satellite channel with real-time connections
Gotta A.
The paper aims at devising a control system for dynamic resource allocation in a multi-service satellite network with real-time and streaming connections. A Master Station adaptively partitions the overall satellite capacity among the earth stations, according to their traffic load and fading conditions. Within the bandwidth temporarily assigned, the stations independently perform Call Admission Control (CAC) of real-time connection requests and assign the proper redundancy to overcome the fading effects. Thus, there is a double cross-layer interaction between the physical and data link layers, whereby the fading severity plays a role in the overall bandwidth allocation. The performance of the method is analyzed by simulation, under a realistic link budget and real fading patterns.Source: 2nd International Symposium on Wireless Communication Systems (ISWCS'05), pp. 865–869, Siena, Italy, 5-9 September 2005
Gotta A.
The paper aims at devising a control system for dynamic resource allocation in a multi-service satellite network with real-time and streaming connections. A Master Station adaptively partitions the overall satellite capacity among the earth stations, according to their traffic load and fading conditions. Within the bandwidth temporarily assigned, the stations independently perform Call Admission Control (CAC) of real-time connection requests and assign the proper redundancy to overcome the fading effects. Thus, there is a double cross-layer interaction between the physical and data link layers, whereby the fading severity plays a role in the overall bandwidth allocation. The performance of the method is analyzed by simulation, under a realistic link budget and real fading patterns.Source: 2nd International Symposium on Wireless Communication Systems (ISWCS'05), pp. 865–869, Siena, Italy, 5-9 September 2005
See at: CNR ExploRA
2008
Doctoral thesis
Unknown
Quality of service and bandwidth allocation in Geo satellite networks: optimization and cross-layer design
Gotta A.
In this thesis I show that a real optimization in radio resource management for satellite networks can be obtained only if cross-layer optimization is applied. Cross-layer optimization is deemed to be a new paradigm for next generation wireless networks, including satellite networks. The combined action of various layers of the network (from the physical layer up to the application layer) is likely to be a good way to combat channel variability, thus approaching as closely as possible an optimal management of the radio resource. However, this procedure is complex and difficult to carry out to the widest possible extent, which would imply numerous cross-layer interactions for control purposes and the related exchange of signalling information. Moreover, when designing cross layer architectures for satellite networks, some care should be taken to conserve the architectural principle of layer separation. In particular, this thesis shows how much is important to define which extent information on lower (e.g. physical) layer parameters should influence control strategies at higher layers. Finally, I discuss some case studies compliant to satellite DVB standards and provide evidence for the benefits of a cross layer design
Gotta A.
In this thesis I show that a real optimization in radio resource management for satellite networks can be obtained only if cross-layer optimization is applied. Cross-layer optimization is deemed to be a new paradigm for next generation wireless networks, including satellite networks. The combined action of various layers of the network (from the physical layer up to the application layer) is likely to be a good way to combat channel variability, thus approaching as closely as possible an optimal management of the radio resource. However, this procedure is complex and difficult to carry out to the widest possible extent, which would imply numerous cross-layer interactions for control purposes and the related exchange of signalling information. Moreover, when designing cross layer architectures for satellite networks, some care should be taken to conserve the architectural principle of layer separation. In particular, this thesis shows how much is important to define which extent information on lower (e.g. physical) layer parameters should influence control strategies at higher layers. Finally, I discuss some case studies compliant to satellite DVB standards and provide evidence for the benefits of a cross layer design
See at: CNR ExploRA
2013
Report
Unknown
A TCP/IP satellite infrastructure for sensing operations in emergency contexts
Gotta A., Luglio M., Roseti C.
The deployment of sensor networks for emergency management must be considered as an irreplaceable support for both monitoring and rescue activities. Depending on the scenario the use of satellite links as a segment of the network ensures connectivity where no other network is available and in some case can also provide an efficient and cost effective means to transfer data. This work aims to define architecture, to identify of optimum solution and to evaluate performance, in terms of throughput and service delay, when a protocol stack - from layer II to layer IV - is considered over a DVB-RCS system. The considered platform is composed of clusters of sensors (including low data rate devices and bulk data cameras) deployed over vast geographical areas, which collect on ground and distribute via satellite multimedia information, i.e. audio, video and sensed data, either for emergency or monitoring operations. A geostationary system was selected in order to guarantee high flexibility in terms of channel capacity. The proposed architecture assumes a session layer protocol, between the transport and application layers, which manages the multiplexing of streams coming from the input sources. The proposed architecture integrates wireless sensor networks and satellite networks, implying to approach technological issues from access layer up to transport and session layers, with heterogeneous traffic sources multiplexed by a satellite gateway, before being encapsulated into TCP/IP flows. Simulation results show the validity of the proposed architecture and protocol solutions.Source: ISTI Technical reports, 2013
Gotta A., Luglio M., Roseti C.
The deployment of sensor networks for emergency management must be considered as an irreplaceable support for both monitoring and rescue activities. Depending on the scenario the use of satellite links as a segment of the network ensures connectivity where no other network is available and in some case can also provide an efficient and cost effective means to transfer data. This work aims to define architecture, to identify of optimum solution and to evaluate performance, in terms of throughput and service delay, when a protocol stack - from layer II to layer IV - is considered over a DVB-RCS system. The considered platform is composed of clusters of sensors (including low data rate devices and bulk data cameras) deployed over vast geographical areas, which collect on ground and distribute via satellite multimedia information, i.e. audio, video and sensed data, either for emergency or monitoring operations. A geostationary system was selected in order to guarantee high flexibility in terms of channel capacity. The proposed architecture assumes a session layer protocol, between the transport and application layers, which manages the multiplexing of streams coming from the input sources. The proposed architecture integrates wireless sensor networks and satellite networks, implying to approach technological issues from access layer up to transport and session layers, with heterogeneous traffic sources multiplexed by a satellite gateway, before being encapsulated into TCP/IP flows. Simulation results show the validity of the proposed architecture and protocol solutions.Source: ISTI Technical reports, 2013
See at: CNR ExploRA
2013
Report
Unknown
SatNEx III - State-of-the-art Web technologies and protocols
Secchi R., Gotta A., Roseti C., Collina M., Fairhurst G., Sun Z. autore/ihili affiliazione
The new paradigm of web usage has motivated in recent years a series of proposals to update the standard Internet protocols related to web traffic. Some of these proposals provided suggestions to upgrade or even completely replace current Hypertext Transport Protocol (HTTP). Others, instead, focused on new TCP transport mechanisms (larger initial window, fast connection open, congestion window validation, tail loss probe, etc.) that are meant to accelerate the completion time of short data transfers. Web technologies are penetrating areas of computer-science before only the prerogative of dedicated computer systems, such as Cloud computing and Service-oriented applications. Web technologies are becoming increasingly prevalent as the delivery model for a wide range of applications, using methods such as Service-oriented architecture (SOA) or software as a service (SaaS). These methods implement the concept of ASP (application service provider) and on-demand computing software delivery: the provider hosts commercially available software and delivers copies of it over the Web, customising the software according to a client's needs. These changes are driving significant alterations in the traffic patterns generated by applications, but the impact of such changes are still uncertain. These changes are also set to change the requirements placed on a network - with an increasing emphasis on minimising web page download time, and an increasing need to consider on-off interactivity. The motivation for transport changes is a growing availability of high speed xDSL/cable access. These high-speed services differ from most wireless and satellite systems in key ways. Current wireless/satellite systems typically employ dynamic capacity schemes with protocol accelerators and access methods that have been tuned for the existing web traffic. The traffic patterns and protocol behaviour of new web protocols is very different. It is therefore important to assess the implications on the design and operation of satellite systems as the new web is increasingly used. This is the focus of this document. The document (TN3.1) reviews the current state-of-the-art of web technologies and surveys the recent proposals, such as SDPY. This document reviews the problems these protocols are trying to solve, and notes the way they try to solve them. In particular, the HTTP/2.0 standard is a new Internet application-layer that defines a new semantic. This is presently a joint effort between the World Wide Web Consortium (W3C) and the Internet Engineering Task Force (IETF). The starting point for the standard inherits ideas from SPDY, an open standard developed by Google and currently available in a wide range of web browsers, including Chromium, Mozilla Firefox and Opera. HTTP/2.0 promises to reduce web page load latency and improve web security using a combination of techniques, including compression, and multiplexing.Source: Project report, SatNEx III, 2013
Project(s): SATNEX
Secchi R., Gotta A., Roseti C., Collina M., Fairhurst G., Sun Z. autore/ihili affiliazione
The new paradigm of web usage has motivated in recent years a series of proposals to update the standard Internet protocols related to web traffic. Some of these proposals provided suggestions to upgrade or even completely replace current Hypertext Transport Protocol (HTTP). Others, instead, focused on new TCP transport mechanisms (larger initial window, fast connection open, congestion window validation, tail loss probe, etc.) that are meant to accelerate the completion time of short data transfers. Web technologies are penetrating areas of computer-science before only the prerogative of dedicated computer systems, such as Cloud computing and Service-oriented applications. Web technologies are becoming increasingly prevalent as the delivery model for a wide range of applications, using methods such as Service-oriented architecture (SOA) or software as a service (SaaS). These methods implement the concept of ASP (application service provider) and on-demand computing software delivery: the provider hosts commercially available software and delivers copies of it over the Web, customising the software according to a client's needs. These changes are driving significant alterations in the traffic patterns generated by applications, but the impact of such changes are still uncertain. These changes are also set to change the requirements placed on a network - with an increasing emphasis on minimising web page download time, and an increasing need to consider on-off interactivity. The motivation for transport changes is a growing availability of high speed xDSL/cable access. These high-speed services differ from most wireless and satellite systems in key ways. Current wireless/satellite systems typically employ dynamic capacity schemes with protocol accelerators and access methods that have been tuned for the existing web traffic. The traffic patterns and protocol behaviour of new web protocols is very different. It is therefore important to assess the implications on the design and operation of satellite systems as the new web is increasingly used. This is the focus of this document. The document (TN3.1) reviews the current state-of-the-art of web technologies and surveys the recent proposals, such as SDPY. This document reviews the problems these protocols are trying to solve, and notes the way they try to solve them. In particular, the HTTP/2.0 standard is a new Internet application-layer that defines a new semantic. This is presently a joint effort between the World Wide Web Consortium (W3C) and the Internet Engineering Task Force (IETF). The starting point for the standard inherits ideas from SPDY, an open standard developed by Google and currently available in a wide range of web browsers, including Chromium, Mozilla Firefox and Opera. HTTP/2.0 promises to reduce web page load latency and improve web security using a combination of techniques, including compression, and multiplexing.Source: Project report, SatNEx III, 2013
Project(s): SATNEX
See at: CNR ExploRA
2013
Report
Unknown
SatNEx III - Analysis and characterisation of new web technology
Cruiskshank H., Secchi R., Gotta A., Roseti C., Collina M., Fairhurst G., Sun Z.
his is the second report in a series of 3 reports. A previous report, TN.3.1, described the evolution of SPDY, the multiplexing architecture and interfaces. This report describes the experimental methods and results. A final report will draw conclusions from this work and provide recommendations for further study.Source: Project report, SatNEx III, 2013
Project(s): SATNEX
Cruiskshank H., Secchi R., Gotta A., Roseti C., Collina M., Fairhurst G., Sun Z.
his is the second report in a series of 3 reports. A previous report, TN.3.1, described the evolution of SPDY, the multiplexing architecture and interfaces. This report describes the experimental methods and results. A final report will draw conclusions from this work and provide recommendations for further study.Source: Project report, SatNEx III, 2013
Project(s): SATNEX
See at: CNR ExploRA
2014
Report
Unknown
SatNEx III - Future Web technologies and protocols over broadband GEO satellite networks
Gotta A., Fairthurst G., Secchi R., Vanelli Coralli A., Collina M., Luglio M., Roseti C., Sun Z., Cruickshank H., Caviglione L.
This project explores the potential implications of introducing the HTTP/2.0 web technology on the design and operation of satellite networks. It has been recognised that as network bandwidth increases, the greater obstacle to the performance of web technology is latency rather than scarcity of capacity. HTTP/2.0 [RD-8] is a new protocol being design by the Internet Engineering Task Force (IETF) and World Wide Web Consortium (W3C) to address the limitations and lack of flexibility of the currently widely deployed HTTP/1.1 [RD-4]. The origin of the emerging HTTP/2.0 standard may be traced back to a GoogleTM suite of protocols, called SPDY. Proposed modifications to HTTP/1.1 include suppression of unnecessary Round Trip Time (RTT) delays to request and deliver web objects, multiplexing of web streams into a single connection, removal of the head of line (HoL) blocking, more compact encoding of HTTP headers, server initiated transmissions (Server Push), a new security model, and an extensible design. In parallel, a number of initiatives from well-known IT actors (GoogleTM, AppleTM etc) have proposed new transport methods, such as QUIC [RD-7] or Minion [RD-23], to enhance performance for web traffic. It is expected that the final HTTP/2.0 specification will replace HTTP/1.1 in every scenario HTTP/1.1 is currently used. The goal of Task3 of CoO3 Satnex-III was to understand the trajectory of the emerging web technologies and to evaluate the expected impact on satellite networking. Different aspects have been analysed by Satnex partners using both real satellite testbeds and emulation. This analysis included evaluation of SPDY performance over satellite and experiments to understand the expected interaction with PEPs (including scenarios with a SPDY proxy at a satellite gateway), the impact of security, and the effect of satellite capacity allocation mechanisms. The analysis also considered the impact of application protocols and the delay induced by end- system networks, such as a satellite-connected WiFi network. In general, experimental results show that HTTP/2.0 benefits the performance of web browsing via satellite by reducing latency and significantly lowering the overhead for several types of web pages. In particular, multiplexing a sequence of small web objects on a webpage onto a single connection enables siginicant gain and effectively reduces the HTTP overhead per object and per connection. The Server Push feature of HTTP/2.0, adds the ability for the server to send objects without explicit request, and was found particularly useful to reduce the download time. However these gains come at a cost, since they impact the design and operation of satellite networks. We also observed places where the tested implementations did not perform optimally, and were performance over satellite-connected WiFi networks was less than would be expected with HTTP/1.1. However, at the time of writing, the work on HTTP/2.0 is not complete and many mechanisms remain to be finalised. Modifications and adjustments are expected in future. Moreover, the current software support for HTTP/2.0 is not yet completely stable, and is expected to continue to evolve long after initial deployment. Satellite networking equipment will need to be updated to support HTTP/2.0. In particular, designs must re-consider the integration of PEPs withHTTP/2.0 and the updated security model, based on Transport Layer Security (TLS). TLS encryption prevents visibility of HTTP headers at satellite equipment, preventing use of current 23089/10/NL/CLP Executive and Summary Report 15/40 III CoO3 - Task 3 - Future Web Technologies and Protocols over Broadband GEO Satellite Networks HTTP acceleration PEPs. Our tests suggest that this problem may be mitigated by HTTP/2.0 itself, because some of the functions implemented in application-layer PEPs (compression, pipeling/multiplexing, push) are already present in HTTP/2.0. HTTP/2.0 is still in a development phase and it is important for the satellite community to watch carefully its progress and understand the implications this will place on the design of the higher layer packet processing. This is especially important because the new model does not introduce a single solution, but more represents a toolkit of techniques that will continue to evolve and will be deployed incrementally over a timescale of months and years ahead. There is also a need to understand the implications on network design/configuration, to ensure that satellite continues to offer high quality service comparable to terrestrial networks, and a need to re-consider the role of PEP in this new architecture. We also urge the satellite networking community to influence development of these standards. As network latency becomes important there is increased focus on low- delay networks, and it is important to ensure that design decisions (maybe unintentional) do not prejudice the performance over long delay paths when the new protocols are deployed.Source: Project report, SatNEx III, 2014
Gotta A., Fairthurst G., Secchi R., Vanelli Coralli A., Collina M., Luglio M., Roseti C., Sun Z., Cruickshank H., Caviglione L.
This project explores the potential implications of introducing the HTTP/2.0 web technology on the design and operation of satellite networks. It has been recognised that as network bandwidth increases, the greater obstacle to the performance of web technology is latency rather than scarcity of capacity. HTTP/2.0 [RD-8] is a new protocol being design by the Internet Engineering Task Force (IETF) and World Wide Web Consortium (W3C) to address the limitations and lack of flexibility of the currently widely deployed HTTP/1.1 [RD-4]. The origin of the emerging HTTP/2.0 standard may be traced back to a GoogleTM suite of protocols, called SPDY. Proposed modifications to HTTP/1.1 include suppression of unnecessary Round Trip Time (RTT) delays to request and deliver web objects, multiplexing of web streams into a single connection, removal of the head of line (HoL) blocking, more compact encoding of HTTP headers, server initiated transmissions (Server Push), a new security model, and an extensible design. In parallel, a number of initiatives from well-known IT actors (GoogleTM, AppleTM etc) have proposed new transport methods, such as QUIC [RD-7] or Minion [RD-23], to enhance performance for web traffic. It is expected that the final HTTP/2.0 specification will replace HTTP/1.1 in every scenario HTTP/1.1 is currently used. The goal of Task3 of CoO3 Satnex-III was to understand the trajectory of the emerging web technologies and to evaluate the expected impact on satellite networking. Different aspects have been analysed by Satnex partners using both real satellite testbeds and emulation. This analysis included evaluation of SPDY performance over satellite and experiments to understand the expected interaction with PEPs (including scenarios with a SPDY proxy at a satellite gateway), the impact of security, and the effect of satellite capacity allocation mechanisms. The analysis also considered the impact of application protocols and the delay induced by end- system networks, such as a satellite-connected WiFi network. In general, experimental results show that HTTP/2.0 benefits the performance of web browsing via satellite by reducing latency and significantly lowering the overhead for several types of web pages. In particular, multiplexing a sequence of small web objects on a webpage onto a single connection enables siginicant gain and effectively reduces the HTTP overhead per object and per connection. The Server Push feature of HTTP/2.0, adds the ability for the server to send objects without explicit request, and was found particularly useful to reduce the download time. However these gains come at a cost, since they impact the design and operation of satellite networks. We also observed places where the tested implementations did not perform optimally, and were performance over satellite-connected WiFi networks was less than would be expected with HTTP/1.1. However, at the time of writing, the work on HTTP/2.0 is not complete and many mechanisms remain to be finalised. Modifications and adjustments are expected in future. Moreover, the current software support for HTTP/2.0 is not yet completely stable, and is expected to continue to evolve long after initial deployment. Satellite networking equipment will need to be updated to support HTTP/2.0. In particular, designs must re-consider the integration of PEPs withHTTP/2.0 and the updated security model, based on Transport Layer Security (TLS). TLS encryption prevents visibility of HTTP headers at satellite equipment, preventing use of current 23089/10/NL/CLP Executive and Summary Report 15/40 III CoO3 - Task 3 - Future Web Technologies and Protocols over Broadband GEO Satellite Networks HTTP acceleration PEPs. Our tests suggest that this problem may be mitigated by HTTP/2.0 itself, because some of the functions implemented in application-layer PEPs (compression, pipeling/multiplexing, push) are already present in HTTP/2.0. HTTP/2.0 is still in a development phase and it is important for the satellite community to watch carefully its progress and understand the implications this will place on the design of the higher layer packet processing. This is especially important because the new model does not introduce a single solution, but more represents a toolkit of techniques that will continue to evolve and will be deployed incrementally over a timescale of months and years ahead. There is also a need to understand the implications on network design/configuration, to ensure that satellite continues to offer high quality service comparable to terrestrial networks, and a need to re-consider the role of PEP in this new architecture. We also urge the satellite networking community to influence development of these standards. As network latency becomes important there is increased focus on low- delay networks, and it is important to ensure that design decisions (maybe unintentional) do not prejudice the performance over long delay paths when the new protocols are deployed.Source: Project report, SatNEx III, 2014
See at: CNR ExploRA
2014
Report
Unknown
SatNex III - State-of-the-art Web Technologies and Protocols State-of-the-art Web Technologies and Protocols
Gotta A., Fairthurst G., Secchi R., Vanelli Coralli A., Collina M., Luglio M., Roseti C., Sun Z., Cruickshank H., Caviglione L.
The new paradigm of web usage has motivated in recent years a series of proposals to update the standard Internet protocols related to web traffic. Some of these proposals provided suggestions to upgrade or even completely replace current Hypertext Transport Protocol (HTTP). Others, instead, focused on new TCP transport mechanisms (larger initial window, fast connection open, congestion window validation, tail loss probe, etc.) that are meant to accelerate the completion time of short data transfers. Web technologies are penetrating areas of computer-science before only the prerogative of dedicated computer systems, such as Cloud computing and Service- oriented applications. Web technologies are becoming increasingly prevalent as the delivery model for a wide range of applications, using methods such as Service- oriented architecture (SOA) or software as a service (SaaS). These methods implement the concept of ASP (application service provider) and on-demand computing software delivery: the provider hosts commercially available software and delivers copies of it over the Web, customising the software according to a client's needs. These changes are driving significant alterations in the traffic patterns generated by applications, but the impact of such changes are still uncertain. These changes are also set to change the requirements placed on a network - with an increasing emphasis on minimising web page download time, and an increasing need to consider on-off interactivity. The motivation for transport changes is a growing availability of high speed xDSL/cable access. These high-speed services differ from most wireless and satellite systems in key ways. Current wireless/satellite systems typically employ dynamic capacity schemes with protocol accelerators and access methods that have been tuned for the existing web traffic. The traffic patterns and protocol behaviour of new web protocols is very different. It is therefore important to assess the implications on the design and operation of satellite systems as the new web is increasingly used. This is the focus of this document. The document (TN3.1) reviews the current state-of-the-art of web technologies and surveys the recent proposals, such as SDPY. This document reviews the problems these protocols are trying to solve, and notes the way they try to solve them. In particular, the HTTP/2.0 standard is a new Internet application-layer that defines a new semantic. This is presently a joint effort between the World Wide Web Consortium (W3C) and the Internet Engineering Task Force (IETF). The starting point for the standard inherits ideas from SPDY, an open standard developed by Google and currently available in a wide range of web browsers, including Chromium, Mozilla Firefox and Opera. HTTP/2.0 promises to reduce web page load latency and improve web security using a combination of techniques, including compression, and multiplexing.Source: Project report, SatNEx III, 2014
Gotta A., Fairthurst G., Secchi R., Vanelli Coralli A., Collina M., Luglio M., Roseti C., Sun Z., Cruickshank H., Caviglione L.
The new paradigm of web usage has motivated in recent years a series of proposals to update the standard Internet protocols related to web traffic. Some of these proposals provided suggestions to upgrade or even completely replace current Hypertext Transport Protocol (HTTP). Others, instead, focused on new TCP transport mechanisms (larger initial window, fast connection open, congestion window validation, tail loss probe, etc.) that are meant to accelerate the completion time of short data transfers. Web technologies are penetrating areas of computer-science before only the prerogative of dedicated computer systems, such as Cloud computing and Service- oriented applications. Web technologies are becoming increasingly prevalent as the delivery model for a wide range of applications, using methods such as Service- oriented architecture (SOA) or software as a service (SaaS). These methods implement the concept of ASP (application service provider) and on-demand computing software delivery: the provider hosts commercially available software and delivers copies of it over the Web, customising the software according to a client's needs. These changes are driving significant alterations in the traffic patterns generated by applications, but the impact of such changes are still uncertain. These changes are also set to change the requirements placed on a network - with an increasing emphasis on minimising web page download time, and an increasing need to consider on-off interactivity. The motivation for transport changes is a growing availability of high speed xDSL/cable access. These high-speed services differ from most wireless and satellite systems in key ways. Current wireless/satellite systems typically employ dynamic capacity schemes with protocol accelerators and access methods that have been tuned for the existing web traffic. The traffic patterns and protocol behaviour of new web protocols is very different. It is therefore important to assess the implications on the design and operation of satellite systems as the new web is increasingly used. This is the focus of this document. The document (TN3.1) reviews the current state-of-the-art of web technologies and surveys the recent proposals, such as SDPY. This document reviews the problems these protocols are trying to solve, and notes the way they try to solve them. In particular, the HTTP/2.0 standard is a new Internet application-layer that defines a new semantic. This is presently a joint effort between the World Wide Web Consortium (W3C) and the Internet Engineering Task Force (IETF). The starting point for the standard inherits ideas from SPDY, an open standard developed by Google and currently available in a wide range of web browsers, including Chromium, Mozilla Firefox and Opera. HTTP/2.0 promises to reduce web page load latency and improve web security using a combination of techniques, including compression, and multiplexing.Source: Project report, SatNEx III, 2014
See at: CNR ExploRA
2014
Journal article
Restricted
A TCP/IP satellite infrastructure for sensing operations in emergency contexts
Gotta A., Luglio M., Roseti C.
The deployment of sensor networks for emergency management must be considered as an irreplaceable support for both monitoring and rescue activities. Depending on the scenario the use of satellite links as a segment of the network ensures connectivity where no other network is available and in some case can also provide an efficient and cost effective means to transfer data. This work aims to define architecture, to identify of optimum solution and to evaluate performance, in terms of throughput and service delay, when a protocol stack - from layer II to layer IV - is considered over a DVB-RCS system. The considered platform is composed of clusters of sensors (including low data rate devices and bulk data cameras) deployed over vast geographical areas, which collect on ground and distribute via satellite multimedia information, i.e. audio, video and sensed data, either for emergency or monitoring operations. A geostationary system was selected in order to guarantee high flexibility in terms of channel capacity. The proposed architecture assumes a session layer protocol, between the transport and application layers, which manages the multiplexing of streams coming from the input sources. The proposed architecture integrates wireless sensor networks and satellite networks, implying to approach technological issues from access layer up to transport and session layers, with heterogeneous traffic sources multiplexed by a satellite gateway, before being encapsulated into TCP/IP flows. Simulation results show the validity of the proposed architecture and protocol solutions.Source: Computer networks (1999) 60 (2014): 147–159. doi:10.1016/j.bjp.2013.11.001
DOI: 10.1016/j.bjp.2013.11.001
Metrics:
Gotta A., Luglio M., Roseti C.
The deployment of sensor networks for emergency management must be considered as an irreplaceable support for both monitoring and rescue activities. Depending on the scenario the use of satellite links as a segment of the network ensures connectivity where no other network is available and in some case can also provide an efficient and cost effective means to transfer data. This work aims to define architecture, to identify of optimum solution and to evaluate performance, in terms of throughput and service delay, when a protocol stack - from layer II to layer IV - is considered over a DVB-RCS system. The considered platform is composed of clusters of sensors (including low data rate devices and bulk data cameras) deployed over vast geographical areas, which collect on ground and distribute via satellite multimedia information, i.e. audio, video and sensed data, either for emergency or monitoring operations. A geostationary system was selected in order to guarantee high flexibility in terms of channel capacity. The proposed architecture assumes a session layer protocol, between the transport and application layers, which manages the multiplexing of streams coming from the input sources. The proposed architecture integrates wireless sensor networks and satellite networks, implying to approach technological issues from access layer up to transport and session layers, with heterogeneous traffic sources multiplexed by a satellite gateway, before being encapsulated into TCP/IP flows. Simulation results show the validity of the proposed architecture and protocol solutions.Source: Computer networks (1999) 60 (2014): 147–159. doi:10.1016/j.bjp.2013.11.001
DOI: 10.1016/j.bjp.2013.11.001
Metrics:
See at:
Computer Networks 
| www.sciencedirect.com | CNR ExploRA
2021
Report
Restricted
International Network Generations Roadmap - Satellite
Kota S., Giambene G., Pillai P., Alouini M. A. M., Bas J., Dalai D., Darwish T., De Cola T., Delamotte T., Giordani M., Gotta A., Khattab T., Knopp A., Kurt G. K., Manoj B. S., Medjo J. D., Rawat P., Saxena P., Scanlan P., Sharma A., Sperber R., Tarchi D., Verma S., Yanikomeroglu H., Zhao K., Zhao L.
The fifth-generation (5G) Wireless Communication systems development has brought out a paradigm shift using advanced technologies e.g., softwarization, virtualization, Massive MIMO, ultra- densification and introduction of new frequency bands. However, as the societal needs grow, and to satisfy UN's Sustainable Development Goals (SDGs), 6G and beyond systems are envisioned. Non- Terrestrial Networks including satellite systems, Unmanned Aerial Vehicles (UAVs) and High Altitude Platforms (HAPs) provide the best solutions to connect the unconnected, unserved and underserved in remote and rural areas in particular. Over the past few decades, Geo Synchronous Orbits (GSO) satellite systems have been deployed to support broadband services, backhauling, Disaster Recovery and Continuity of Operations (DR-COOP) and emergency services. Recently, there is a considerable renewed interest in planning and developing non-GSO satellite systems. Within the next few years there will be several thousands of Low Earth Orbit (LEO) satellite systems, mega constellations, will be ready to provide global Internet services. This report is the 2021 Edition of the INGR Satellite Working Group Report, subsequent to the First Edition [1]. The topics considered in this INGR Satellite WG 2021 Edition of the roadmap are the following: applications and services, reference architectures, new MIMO-based PHY, antenna and payload, machine learning and artificial intelligence, edge computing, QoS/QoE, security, network management and standardization. The work on the roadmap will continue towards the next edition of the roadmap addressing the details of the challenges and potential solutions for future networks such as 6G and beyond.Source: pp.1–111, 2021
Kota S., Giambene G., Pillai P., Alouini M. A. M., Bas J., Dalai D., Darwish T., De Cola T., Delamotte T., Giordani M., Gotta A., Khattab T., Knopp A., Kurt G. K., Manoj B. S., Medjo J. D., Rawat P., Saxena P., Scanlan P., Sharma A., Sperber R., Tarchi D., Verma S., Yanikomeroglu H., Zhao K., Zhao L.
The fifth-generation (5G) Wireless Communication systems development has brought out a paradigm shift using advanced technologies e.g., softwarization, virtualization, Massive MIMO, ultra- densification and introduction of new frequency bands. However, as the societal needs grow, and to satisfy UN's Sustainable Development Goals (SDGs), 6G and beyond systems are envisioned. Non- Terrestrial Networks including satellite systems, Unmanned Aerial Vehicles (UAVs) and High Altitude Platforms (HAPs) provide the best solutions to connect the unconnected, unserved and underserved in remote and rural areas in particular. Over the past few decades, Geo Synchronous Orbits (GSO) satellite systems have been deployed to support broadband services, backhauling, Disaster Recovery and Continuity of Operations (DR-COOP) and emergency services. Recently, there is a considerable renewed interest in planning and developing non-GSO satellite systems. Within the next few years there will be several thousands of Low Earth Orbit (LEO) satellite systems, mega constellations, will be ready to provide global Internet services. This report is the 2021 Edition of the INGR Satellite Working Group Report, subsequent to the First Edition [1]. The topics considered in this INGR Satellite WG 2021 Edition of the roadmap are the following: applications and services, reference architectures, new MIMO-based PHY, antenna and payload, machine learning and artificial intelligence, edge computing, QoS/QoE, security, network management and standardization. The work on the roadmap will continue towards the next edition of the roadmap addressing the details of the challenges and potential solutions for future networks such as 6G and beyond.Source: pp.1–111, 2021
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futurenetworks.ieee.org | CNR ExploRA
2020
Contribution to journal
Open Access
Introduction to the special theme: Blue Growth
Gotta A., Mardikis J.
Source: ERCIM news online edition 123 (2020): 6–8.
Gotta A., Mardikis J.
Source: ERCIM news online edition 123 (2020): 6–8.
See at:
ercim-news.ercim.eu 
| ISTI Repository | CNR ExploRA
2022
Conference article
Restricted
Satellite
Kota S., Giambene G., Abdelsadek M., Alouini M. S., Babu S., Bas J., Chaudhari S., Dalai D., Darwish T., De Cola T., Delamotte T., Dutta A., Dwivedi A., Enright M., Giordani M., Gotta A., Hammad E., Khattab T., Knopp A., Karabulut Kurt G., Manoj B. S., Medjo Me Biomo J. D., Pillai P., Rawat P., Saxena P., Scanlan P., Sharma A., Sperber R., Sun Z., Tarchi D., Varshney N., Verma S., Yanikomeroglu H., Zhao K., Zhao L.
The fifth generation (5G) Wireless Communication systems development has brought out a paradigm shift using advanced technologies e.g., softwarization, virtualization, Massive MIMO, ultra-densification and introduction of new frequency bands. However, as the societal needs grow, and to satisfy UN's Sustainable Development Goals (SDGs), 6G and beyond systems are envisioned. Non- Terrestrial Networks including satellite systems, Unmanned Aerial Vehicles (UAVs) and High-Altitude Platforms (HAPs) provide the best solutions to connect the unconnected, unserved and underserved in remote and rural areas in particular. Over the past few decades, Geo Synchronous Orbits (GSO) satellite systems have been deployed to support broadband services, backhauling, Disaster Recovery and Continuity of Operations (DR-COOP) and emergency services. Recently, there is a considerable renewed interest in planning and developing non-GSO satellite systems. Within the next few years several thousands of Low Earth Orbit (LEO) satellites and mega LEO constellations will be ready to provide global Internet services. This report is the 2022 Edition of the INGR Satellite Working Group Report, subsequent to the previous two editions [1] [2]. The topics considered in this INGR Satellite WG 2022 Edition of the roadmap are the following taking 6G systems into account: applications and services, reference architectures (both backhaul and direct access), satellite loT, mm Wave use for satellite networks, machine learning and artificial intelligence, edge computing, QoS/QoE, security, network management and standardization. The work on the roadmap will continue towards the next edition of the roadmap addressing new challenges and potential solutions for future networks.Source: FNWF 2022 - IEEE Future Networks World Forum, Montreal, Canada, 10-14/10/2022
DOI: 10.1109/fnwf55208.2022.00141
Metrics:
Kota S., Giambene G., Abdelsadek M., Alouini M. S., Babu S., Bas J., Chaudhari S., Dalai D., Darwish T., De Cola T., Delamotte T., Dutta A., Dwivedi A., Enright M., Giordani M., Gotta A., Hammad E., Khattab T., Knopp A., Karabulut Kurt G., Manoj B. S., Medjo Me Biomo J. D., Pillai P., Rawat P., Saxena P., Scanlan P., Sharma A., Sperber R., Sun Z., Tarchi D., Varshney N., Verma S., Yanikomeroglu H., Zhao K., Zhao L.
The fifth generation (5G) Wireless Communication systems development has brought out a paradigm shift using advanced technologies e.g., softwarization, virtualization, Massive MIMO, ultra-densification and introduction of new frequency bands. However, as the societal needs grow, and to satisfy UN's Sustainable Development Goals (SDGs), 6G and beyond systems are envisioned. Non- Terrestrial Networks including satellite systems, Unmanned Aerial Vehicles (UAVs) and High-Altitude Platforms (HAPs) provide the best solutions to connect the unconnected, unserved and underserved in remote and rural areas in particular. Over the past few decades, Geo Synchronous Orbits (GSO) satellite systems have been deployed to support broadband services, backhauling, Disaster Recovery and Continuity of Operations (DR-COOP) and emergency services. Recently, there is a considerable renewed interest in planning and developing non-GSO satellite systems. Within the next few years several thousands of Low Earth Orbit (LEO) satellites and mega LEO constellations will be ready to provide global Internet services. This report is the 2022 Edition of the INGR Satellite Working Group Report, subsequent to the previous two editions [1] [2]. The topics considered in this INGR Satellite WG 2022 Edition of the roadmap are the following taking 6G systems into account: applications and services, reference architectures (both backhaul and direct access), satellite loT, mm Wave use for satellite networks, machine learning and artificial intelligence, edge computing, QoS/QoE, security, network management and standardization. The work on the roadmap will continue towards the next edition of the roadmap addressing new challenges and potential solutions for future networks.Source: FNWF 2022 - IEEE Future Networks World Forum, Montreal, Canada, 10-14/10/2022
DOI: 10.1109/fnwf55208.2022.00141
Metrics:
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doi.org | ieeexplore.ieee.org | CNR ExploRA
2007
Journal article
Restricted
Fusion of digital television, broadband Internet and mobile communications - Part I: Enabling technologies
Ong F., Liang X., Pillai P., Chan P., Koltsidas G., Pavlidou F., Ferro E., Gotta A., Cruickshank H., Iyengar S., Fairhurst G., Mancuso V.
The introduction of digital video broadcasting (DVB) satellite systems has become an important tool for future mobile communication and is currently a focus in several research areas such as the integration of DVB satellite systems with different wireless technologies. This tutorial consists of two parts, Enabling technologies and Future service scenarios, which aims to provide an introduction to the current state-of-theart of DVB standards over satellite and its fusion with mobile and Internet technologies. This paper, Enabling technologies, focuses on providing an overview of the different technologies and issues that facilitates better understanding of the current and future operational scenarios, whereas the second paper, Future service scenarios will emphasize future research directions in this research area. In the first part, the paper will initially be focused on the introduction of different DVB satellite systems, i.e. DVB-via satellite (DVB-S), DVB return channel by satellite (DVB-RCS) and second-generation DVB system for broadband satellite services (DVB-S2). This is then followed by a description of the different Internet Protocol (IP) technologies used to support macro- and micro-mobility and the migration strategies from IP version 4 (IPv4) to IP version 6 (IPv6). Finally, the different security mechanisms for the DVB system and end-to-end satellite network are addressed.Source: International journal of satellite communications and networking (Print) 25 (2007): 363–407.
Ong F., Liang X., Pillai P., Chan P., Koltsidas G., Pavlidou F., Ferro E., Gotta A., Cruickshank H., Iyengar S., Fairhurst G., Mancuso V.
The introduction of digital video broadcasting (DVB) satellite systems has become an important tool for future mobile communication and is currently a focus in several research areas such as the integration of DVB satellite systems with different wireless technologies. This tutorial consists of two parts, Enabling technologies and Future service scenarios, which aims to provide an introduction to the current state-of-theart of DVB standards over satellite and its fusion with mobile and Internet technologies. This paper, Enabling technologies, focuses on providing an overview of the different technologies and issues that facilitates better understanding of the current and future operational scenarios, whereas the second paper, Future service scenarios will emphasize future research directions in this research area. In the first part, the paper will initially be focused on the introduction of different DVB satellite systems, i.e. DVB-via satellite (DVB-S), DVB return channel by satellite (DVB-RCS) and second-generation DVB system for broadband satellite services (DVB-S2). This is then followed by a description of the different Internet Protocol (IP) technologies used to support macro- and micro-mobility and the migration strategies from IP version 4 (IPv4) to IP version 6 (IPv6). Finally, the different security mechanisms for the DVB system and end-to-end satellite network are addressed.Source: International journal of satellite communications and networking (Print) 25 (2007): 363–407.
See at:
www3.interscience.wiley.com | CNR ExploRA
2007
Journal article
Restricted
Fusion of digital television, broadband Internet and mobile communications Part II: Future service scenarios
Liang X., Ong F., Pillai P., Chan P., Mancuso V., Koltsidas G., Pavlidou F., Caviglione L., Ferro E., Gotta A., Cruickshank H., Iyengar S., Fairhurst G.
This is the second part of the tutorial paper following the previous tutorial paper describing enabling technologies in digital video broadcasting (DVB) system. The paper presents the current and future operational scenarios for DVB via satellite (DVB-S) system. Review of the current state-of-the-art technologies consisting of integration of broadband Internet and mobile communications and integration of broadband Internet and DVB are given. The future operational scenarios emphasize the fusion of DVB systems with other technologies in terms of network fusion and terminal fusion. For satellite service scenarios, it also takes into consideration mobility management and standard quality-of-service mechanism issues, such as integrated services and diSource: International journal of satellite communications and networking (Print) 25 (2007): 409–440.
Liang X., Ong F., Pillai P., Chan P., Mancuso V., Koltsidas G., Pavlidou F., Caviglione L., Ferro E., Gotta A., Cruickshank H., Iyengar S., Fairhurst G.
This is the second part of the tutorial paper following the previous tutorial paper describing enabling technologies in digital video broadcasting (DVB) system. The paper presents the current and future operational scenarios for DVB via satellite (DVB-S) system. Review of the current state-of-the-art technologies consisting of integration of broadband Internet and mobile communications and integration of broadband Internet and DVB are given. The future operational scenarios emphasize the fusion of DVB systems with other technologies in terms of network fusion and terminal fusion. For satellite service scenarios, it also takes into consideration mobility management and standard quality-of-service mechanism issues, such as integrated services and diSource: International journal of satellite communications and networking (Print) 25 (2007): 409–440.
See at:
www3.interscience.wiley.com | CNR ExploRA
2007
Conference article
Unknown
Advanced satellite infrastructures in future global Grid computing: network solutions to compensate delivery delay
Bonito B., Gotta A., Secchi R.
Scientific equipments in remote locations are often integrated in a Grid network by means of satellite links. When the Grid is an Internet overlay network, TCP-like congestion control protocols tend to introduce large delays and to achieve poor bandwidth utilization during the startup phase due to the large bandwidth-delay product of the satellite link. Recent studies demonstrate that the loss of performance is high when a demand assignment multiple access (DAMA) scheme is adopted to manage satellite resources. To overcome this problem, we propose a new mechanism based on Quick Start, a recent IETF recommendation, to enhance the startup performance of data and streaming flows. We show, by means of extensive simulations, that our modifications to enable a QS based DAMA algorithm allow the initial end- to-end delay to be significantly reduced and the queue length in transmitting nodes stabilized. Moreover, our results point out that the startup delay is quite independent of the flow rate, which makes this algorithm suitable to the high bitrate required by Grid computing applications.Source: INGRID 2007 - Instrumenting the Grid, Santa Margherita Ligure - Portofino, Italy, 16-18 aprile 2007
Bonito B., Gotta A., Secchi R.
Scientific equipments in remote locations are often integrated in a Grid network by means of satellite links. When the Grid is an Internet overlay network, TCP-like congestion control protocols tend to introduce large delays and to achieve poor bandwidth utilization during the startup phase due to the large bandwidth-delay product of the satellite link. Recent studies demonstrate that the loss of performance is high when a demand assignment multiple access (DAMA) scheme is adopted to manage satellite resources. To overcome this problem, we propose a new mechanism based on Quick Start, a recent IETF recommendation, to enhance the startup performance of data and streaming flows. We show, by means of extensive simulations, that our modifications to enable a QS based DAMA algorithm allow the initial end- to-end delay to be significantly reduced and the queue length in transmitting nodes stabilized. Moreover, our results point out that the startup delay is quite independent of the flow rate, which makes this algorithm suitable to the high bitrate required by Grid computing applications.Source: INGRID 2007 - Instrumenting the Grid, Santa Margherita Ligure - Portofino, Italy, 16-18 aprile 2007
See at: CNR ExploRA
2008
Conference article
Restricted
Experimental video broadcasting in DVB-RCS/S2 with land mobile satellite channel: a reliability issue
Barsocchi P., Gotta A.
This paper aims at studying the behaviour of Satellite DVB systems in a vehicular mobile environment by deriving a channel model at packet level that accounts for the mobile characteristic of the channel and the performance of the DVB architecture at physical layer. Moreover the paper provides some solutions based on error recovery techniques, i.e. packet level FEC and interleaving, in order to boost the Quality of Service of streaming applications by providing quantitative and qualitative metrics of the reliability of such transmissions over a land mobile satellite channel.Source: International Workshop on Satellite Communications, pp. 234–238, Toulouse, France, 01-03 October 2008
DOI: 10.1109/iwssc.2008.4656797
Metrics:
Barsocchi P., Gotta A.
This paper aims at studying the behaviour of Satellite DVB systems in a vehicular mobile environment by deriving a channel model at packet level that accounts for the mobile characteristic of the channel and the performance of the DVB architecture at physical layer. Moreover the paper provides some solutions based on error recovery techniques, i.e. packet level FEC and interleaving, in order to boost the Quality of Service of streaming applications by providing quantitative and qualitative metrics of the reliability of such transmissions over a land mobile satellite channel.Source: International Workshop on Satellite Communications, pp. 234–238, Toulouse, France, 01-03 October 2008
DOI: 10.1109/iwssc.2008.4656797
Metrics:
See at:
doi.org | CNR ExploRA
2006
Report
Open Access
An Analysis of TCP Startup over an Experimental DVB-RCS Platform
Gotta A., Potortì F., Secchi R.
Satellite systems are evolving towards higher avail- able bandwidths and dynamic allocation based on instantaneous traffic rates offered at the stations, so called BoD (bandwidth on demand) channel sharing. This trend is coupled with more and more powerful error correcting schemes, like those adopted in the recent DVB-S2 standard, which promise to make the channel virtually immune from packet errors. These factors combine so that most TCP connections would send all of their data during the Slow Start phase. We investigate the performance of TCP during startup on recent BoD system by observing and explaining the behavior of different TCP flavors on different systems when transmitting data over a Skyplex satellite system. We make recommendations for choosing and improving TCP implementations and for future BoD allocation schemesSource: ISTI Technical reports, 2006
Gotta A., Potortì F., Secchi R.
Satellite systems are evolving towards higher avail- able bandwidths and dynamic allocation based on instantaneous traffic rates offered at the stations, so called BoD (bandwidth on demand) channel sharing. This trend is coupled with more and more powerful error correcting schemes, like those adopted in the recent DVB-S2 standard, which promise to make the channel virtually immune from packet errors. These factors combine so that most TCP connections would send all of their data during the Slow Start phase. We investigate the performance of TCP during startup on recent BoD system by observing and explaining the behavior of different TCP flavors on different systems when transmitting data over a Skyplex satellite system. We make recommendations for choosing and improving TCP implementations and for future BoD allocation schemesSource: ISTI Technical reports, 2006
See at:
ISTI Repository | CNR ExploRA
2007
Report
Open Access
State of the art in networks and grid infrastructures
Bonito B., Gotta A.
In order to connect and access instruments located at various places on earth one needs a special grid infrastructure connected via high-speed, low-latency networks. The requirements of the network are dictated by the instruments themselves which are deployed within the grid. There are several possibilities how to achieve the desired properties of a network: Using special hardware, using the right protocols in the network protocol stack, and selecting appropriate middleware. All of these options will be discussed in this deliverable. There also exist several projects and testbeds related to the idea of remote instrumentation. This deliverable will have a look at the most important ones, in order to gain information which would otherwise not be possible to retrieve during RINGrid's short project lifetime.Source: Project report, RINGrid, Deliverable 3.1, 2007
Bonito B., Gotta A.
In order to connect and access instruments located at various places on earth one needs a special grid infrastructure connected via high-speed, low-latency networks. The requirements of the network are dictated by the instruments themselves which are deployed within the grid. There are several possibilities how to achieve the desired properties of a network: Using special hardware, using the right protocols in the network protocol stack, and selecting appropriate middleware. All of these options will be discussed in this deliverable. There also exist several projects and testbeds related to the idea of remote instrumentation. This deliverable will have a look at the most important ones, in order to gain information which would otherwise not be possible to retrieve during RINGrid's short project lifetime.Source: Project report, RINGrid, Deliverable 3.1, 2007
See at:
ISTI Repository | CNR ExploRA
2007
Report
Open Access
Status of grid middleware and corresponding emerging standards for potential usage in sharing scientific instruments via (International) networks
Bonito B., Gotta A.
Grid computing is a broadly accepted paradigm for sharing resources like processing power, or storage space. However, the grid is based on such a broad concept that it can do more than just integrating computing facilties. For example, it can be used to access expensive and thus not so easily available instruments. However, the middleware for instrument integration is not as well- polished as the middleware which is available for integrating computing facilities. This document gives an overview of the the solutions which are available, or are currently emerging, for remote instrumentation. Since remote instrumentation is a topic currently heavily under research, there are not many solutions available. Thus, this document concentrates on the solutions which are available, such as CIMA, as well as competing projects, such as GridCC. It also gives some use cases which help identify weak spots in the currently available technologies.Source: Project report, RINGrid, Deliverable 3.2, 2007
Bonito B., Gotta A.
Grid computing is a broadly accepted paradigm for sharing resources like processing power, or storage space. However, the grid is based on such a broad concept that it can do more than just integrating computing facilties. For example, it can be used to access expensive and thus not so easily available instruments. However, the middleware for instrument integration is not as well- polished as the middleware which is available for integrating computing facilities. This document gives an overview of the the solutions which are available, or are currently emerging, for remote instrumentation. Since remote instrumentation is a topic currently heavily under research, there are not many solutions available. Thus, this document concentrates on the solutions which are available, such as CIMA, as well as competing projects, such as GridCC. It also gives some use cases which help identify weak spots in the currently available technologies.Source: Project report, RINGrid, Deliverable 3.2, 2007
See at:
ISTI Repository | CNR ExploRA
2007
Report
Open Access
Summary of requirements and needs to be currently fulfilled to efficiently introduce the remote instrumentation idea into practice
Bonito B., Gotta A.
This deliverable marks the end of a series of three deliverables. The three deliverables showed the reader what the state of the art in remote instrumentation middleware and networks currently is. While the second deliverable identified applications which benefit from remote instrumen- tation, this deliverable points out what prerequisites must be met in order to successfully convert these applications into remote instrumentation applications. Therefore, this deliverable serves as a basis for ongoing work regarding drafting a remote instrumentation architecture (WP6) as well for standardization efforts carried out by the RISGE (Remote Instrumentation Services in Grid Environments) research group which is currently established under the patronage of the OGF (Open Grid Forum).Source: Project report, RINGrid, Deliverable 3.3, 2007
Bonito B., Gotta A.
This deliverable marks the end of a series of three deliverables. The three deliverables showed the reader what the state of the art in remote instrumentation middleware and networks currently is. While the second deliverable identified applications which benefit from remote instrumen- tation, this deliverable points out what prerequisites must be met in order to successfully convert these applications into remote instrumentation applications. Therefore, this deliverable serves as a basis for ongoing work regarding drafting a remote instrumentation architecture (WP6) as well for standardization efforts carried out by the RISGE (Remote Instrumentation Services in Grid Environments) research group which is currently established under the patronage of the OGF (Open Grid Forum).Source: Project report, RINGrid, Deliverable 3.3, 2007
See at:
ISTI Repository | CNR ExploRA
2010
Report
Unknown
Modeling systematic upper layer FEC codes and interleaving in land mobile satellite channel
Celandroni N., Gotta A.
This work provides an analytical model for evaluating the performance of upper layer forward error correction (FEC) when used together with interleaving on land mobile satellite channels, in terms of residual (after decoding) packet loss rate. In addition, simulations highlight the overheads introduced by this technique, which depend on the channel statistics, in terms of additional packet delivery delay, bandwidth consumption, and computation power required. In fact, we will show why the interleaver is mandatory in some environments, due to the severe disruptive characteristics of the channel, according to measurement campaigns promoted by European Space Agency. This model differs from related works, since it provides the exact residual loss rate on information packets, when systematic FEC coding blocks are interleaved at packet level (i.e. when a cyclic redundancy check and a sequence number identify a precise data unit). The derived analytical model can be employed for performance evaluation of recent and future mobile communication systems that take advantage of upper layer FEC and interleaving techniques.Source: ISTI Technical reports, 2010
Celandroni N., Gotta A.
This work provides an analytical model for evaluating the performance of upper layer forward error correction (FEC) when used together with interleaving on land mobile satellite channels, in terms of residual (after decoding) packet loss rate. In addition, simulations highlight the overheads introduced by this technique, which depend on the channel statistics, in terms of additional packet delivery delay, bandwidth consumption, and computation power required. In fact, we will show why the interleaver is mandatory in some environments, due to the severe disruptive characteristics of the channel, according to measurement campaigns promoted by European Space Agency. This model differs from related works, since it provides the exact residual loss rate on information packets, when systematic FEC coding blocks are interleaved at packet level (i.e. when a cyclic redundancy check and a sequence number identify a precise data unit). The derived analytical model can be employed for performance evaluation of recent and future mobile communication systems that take advantage of upper layer FEC and interleaving techniques.Source: ISTI Technical reports, 2010
See at: CNR ExploRA