Nowadays, the realization and the deployment of network infrastructures able to guarantee connect... more Nowadays, the realization and the deployment of network infrastructures able to guarantee connectivity to geographical areas characterized by hazardous access conditions, such as remote sensor networks, disaster areas and interplanetary networks, are assuming great importance. Under this view, the large access latencies along with the high percentage of lost packets makes the applicability of TCP/IP protocol suite almost unfeasible. A promising solution counteracting TCP/IP shortcomings is represented by the delay tolerant network (DTN) architecture, which exploits the principle of the mail delivery service to guarantee the success of the information transfer. This paper applies the DTN concepts to data communications achieved in deep space environments and investigates the adoption of error control schemes implemented at the higher layers, in order to make the transmission more reliable without the need of a feedback link for the acknowledgment transportation
Optimizing the optical feeder-links is essential in providing broadband connectivity between grou... more Optimizing the optical feeder-links is essential in providing broadband connectivity between ground and space. The system architecture is being investigated and experiments are being performed to integrate B5G technologies. Atmospheric turbulence mitigation is being demonstrated to provide a stable feeder-link and maximize the data throughput.
New generations of public safety communications will be building on the top of LTE technologies, ... more New generations of public safety communications will be building on the top of LTE technologies, taking advantage of its improved performance in capacity and quality of service. LTE networks present a unique opportunity to provide innovative applications and networking solutions to first responders. Flexible LTE deployments using satellite backhauling are being investigated raising new challenges regarding the integration of these technologies. In this paper, a delay-tolerant approach for different priorities of traffic management in LTE cell interconnected using satellite backhauling is presented. Long propagation delays and frequent disruptions of satellite links bring several challenges, especially to map the LTE quality of service requirements for traffic. We design and evaluate Disruption Management Agent (DMA), which acts as bridge between LTE and satellite technologies for providing end-to-end Quality of Service (QoS). Simulations results using several scenarios have shown the effectiveness of our solution to deliver an appropriate quality of service to first responders.
The increasing demand for mobile services has been calling for new anywhere-anytime communication... more The increasing demand for mobile services has been calling for new anywhere-anytime communication paradigms, building on the integration of heterogeneous technologies, such as satellite, LTE, and the new generation of mobile networks, i.e., 5G. In particular, the network design philosophy has shifted towards a more content-oriented approach so as to more efficiently meet the users' demands in terms of fast content availability and service continuity. Following this line, this paper proposes an enhancement to the PURSUIT information centric network (ICN) architecture, so as to improve the quality of experience of users in highly mobile environments. Simulation campaigns show the performance gain offered by the proposed solution with respect to regular PURSUIT implementations and benchmark IP-based strategies.
Offering very large data rates is one of the main objectives of Very High Throughput Satellite (V... more Offering very large data rates is one of the main objectives of Very High Throughput Satellite (VHTS) systems to boost enhanced Mobile Broadband (eMBB) services in converged 5G-satellite systems. To this end, the exploitation of Q/V frequency bands for the satellite feeder link is a key factor for guaranteeing unprecedented data rates provided that efficient handover algorithms are implemented to counteract link outage events caused by severe weather impairments. Moreover, Quality of Service (QoS) of data flows is typically affected when gateway handover is initiated, hence calling for sophisticated ground segment management solutions. In this light, this paper proposes a novel gateway handover strategy and validates its design through simulation campaigns, whose preliminary results show important performance gains with respect to other solutions available from the existing literature.
Support of data communication during disaster management operations is traditionally achieved by ... more Support of data communication during disaster management operations is traditionally achieved by means of Internet Protocol (IP)-based networks, which however show some limitation in terms of mobility support and resilience to link disruption. A new promising networking paradigm is represented by Information Centric Networking (ICN) architectures implementing caching functions, which are studied in this paper for their potentials to support emergency communications in integrated satellite-terrestrial networks. Simulation campaigns show the advantages offered by the Named Data Networking (NDN) architecture in terms of delivery latency and overall gain in comparison to IP-based architectures.
IEEE Transactions on Vehicular Technology, Oct 1, 2020
The integration of satellite communications into 5G ecosystem is pivotal to boost enhanced mobile... more The integration of satellite communications into 5G ecosystem is pivotal to boost enhanced mobile broadband (eMBB) services in highly dynamic scenarios and in areas not optimally supported by terrestrial infrastructures. Given the heterogeneity of the networks involved, network slicing is key networking paradigm to ensure different grades of quality of service (QoS) based on the users’ and verticals’ requirements. In this light, this paper proposes an optimisation framework able to exploit the available resources allocated to the defined network slices so as to meet the diverse QoS/QoE requirements exposed by the network actors. Resource allocation schemes built upon neural network algorithms are validated through extensive simulation campaigns that have shown the superiority of the proposed concepts with respect to other solution candidates available from the literature.
Nowadays, the realization and the deployment of network infrastructures able to guarantee connect... more Nowadays, the realization and the deployment of network infrastructures able to guarantee connectivity to geographical areas characterized by hazardous access conditions, such as remote sensor networks, disaster areas and interplanetary networks, are assuming great importance. Under this view, the large access latencies along with the high percentage of lost packets makes the applicability of TCP/IP protocol suite almost unfeasible. A promising solution counteracting TCP/IP shortcomings is represented by the delay tolerant network (DTN) architecture, which exploits the principle of the mail delivery service to guarantee the success of the information transfer. This paper applies the DTN concepts to data communications achieved in deep space environments and investigates the adoption of error control schemes implemented at the higher layers, in order to make the transmission more reliable without the need of a feedback link for the acknowledgment transportation
Optimizing the optical feeder-links is essential in providing broadband connectivity between grou... more Optimizing the optical feeder-links is essential in providing broadband connectivity between ground and space. The system architecture is being investigated and experiments are being performed to integrate B5G technologies. Atmospheric turbulence mitigation is being demonstrated to provide a stable feeder-link and maximize the data throughput.
New generations of public safety communications will be building on the top of LTE technologies, ... more New generations of public safety communications will be building on the top of LTE technologies, taking advantage of its improved performance in capacity and quality of service. LTE networks present a unique opportunity to provide innovative applications and networking solutions to first responders. Flexible LTE deployments using satellite backhauling are being investigated raising new challenges regarding the integration of these technologies. In this paper, a delay-tolerant approach for different priorities of traffic management in LTE cell interconnected using satellite backhauling is presented. Long propagation delays and frequent disruptions of satellite links bring several challenges, especially to map the LTE quality of service requirements for traffic. We design and evaluate Disruption Management Agent (DMA), which acts as bridge between LTE and satellite technologies for providing end-to-end Quality of Service (QoS). Simulations results using several scenarios have shown the effectiveness of our solution to deliver an appropriate quality of service to first responders.
The increasing demand for mobile services has been calling for new anywhere-anytime communication... more The increasing demand for mobile services has been calling for new anywhere-anytime communication paradigms, building on the integration of heterogeneous technologies, such as satellite, LTE, and the new generation of mobile networks, i.e., 5G. In particular, the network design philosophy has shifted towards a more content-oriented approach so as to more efficiently meet the users' demands in terms of fast content availability and service continuity. Following this line, this paper proposes an enhancement to the PURSUIT information centric network (ICN) architecture, so as to improve the quality of experience of users in highly mobile environments. Simulation campaigns show the performance gain offered by the proposed solution with respect to regular PURSUIT implementations and benchmark IP-based strategies.
Offering very large data rates is one of the main objectives of Very High Throughput Satellite (V... more Offering very large data rates is one of the main objectives of Very High Throughput Satellite (VHTS) systems to boost enhanced Mobile Broadband (eMBB) services in converged 5G-satellite systems. To this end, the exploitation of Q/V frequency bands for the satellite feeder link is a key factor for guaranteeing unprecedented data rates provided that efficient handover algorithms are implemented to counteract link outage events caused by severe weather impairments. Moreover, Quality of Service (QoS) of data flows is typically affected when gateway handover is initiated, hence calling for sophisticated ground segment management solutions. In this light, this paper proposes a novel gateway handover strategy and validates its design through simulation campaigns, whose preliminary results show important performance gains with respect to other solutions available from the existing literature.
Support of data communication during disaster management operations is traditionally achieved by ... more Support of data communication during disaster management operations is traditionally achieved by means of Internet Protocol (IP)-based networks, which however show some limitation in terms of mobility support and resilience to link disruption. A new promising networking paradigm is represented by Information Centric Networking (ICN) architectures implementing caching functions, which are studied in this paper for their potentials to support emergency communications in integrated satellite-terrestrial networks. Simulation campaigns show the advantages offered by the Named Data Networking (NDN) architecture in terms of delivery latency and overall gain in comparison to IP-based architectures.
IEEE Transactions on Vehicular Technology, Oct 1, 2020
The integration of satellite communications into 5G ecosystem is pivotal to boost enhanced mobile... more The integration of satellite communications into 5G ecosystem is pivotal to boost enhanced mobile broadband (eMBB) services in highly dynamic scenarios and in areas not optimally supported by terrestrial infrastructures. Given the heterogeneity of the networks involved, network slicing is key networking paradigm to ensure different grades of quality of service (QoS) based on the users’ and verticals’ requirements. In this light, this paper proposes an optimisation framework able to exploit the available resources allocated to the defined network slices so as to meet the diverse QoS/QoE requirements exposed by the network actors. Resource allocation schemes built upon neural network algorithms are validated through extensive simulation campaigns that have shown the superiority of the proposed concepts with respect to other solution candidates available from the literature.
Uploads
Papers by Tomaso de Cola