D.2.1 Technologies for ABs (Technologies for Alternative Bearers) whose objective is the overview of the state-of-art in the areas of alternative communication bearers (ABs), which are expected to be of interest for improving capabilities of the Adaptable Communication System (ACS). In the document a set of candidate communication technologies have been investigated as potential ones for railway applications.
D.2.2. Assessment of ABs benefits, challenges and impact on infrastructure with RAT Tool and Communication Traffic Analysis This document (Public) assesses the eligibility of candidate Alternative Bearers (AB) to be integrated into the Adaptable Communication System (ACS). In the document, it is described the proposed methodology for the Alternative Bearers (AB) assessment with respect to the data rate categories and ACS Traffic Classes, thus used for the eligibility of the ABs.
D2.3 Assessment and Classification for ABs and AB/TB comparison. It aims to: (i) to analyse the economic aspects of the adoption of the eligible Alternative Bearers (ABs) in a railway context, and (ii) to compare the eligible ABs with the Traditional Bearers (TBs). The eligible ABs are: Free Space Optics (FSO), Low Earth Orbit (LEO) satellite and High-Altitude Platform Station (HAPS).
D2.4 “Experimental assessment of the most promising ABs”. It provides the performance assessment of the eligible Alternative Bearers (ABs): Free Space Optics (FSO), High-Altitude Platform Station (HAPS), and Low-Earth Orbit (LEO) satellite. FSO is mature for a static environment, while LEO is able to provide up to 1 Gbit/s per beam with the DVB-S2 standard. HAPS is evaluated with eNB onboard but legacy User Equipment should be enhanced to improve data rate.
D.3.1 Review of ACS, of existing transport protocols, application protocols, railway applications. The adaptable communication system has been designed to operate in accordance with the bearer independence principle. This is achieved using communication technologies that can be accessed at IP protocol level. In this deliverable we provide a review of the most important transport and application protocols on IP for ACS communications.
D.3.2 Analysis of IPv4/IPv6. The document details the main issues related to IPv4 and IPv6 interworking in ACS including: the additional packet processing for IPv4/IPv6 conversion and the effects of IP address conversion on the Session Initiation Protocol SIP protocol. One solution for implementing IPv4/IPv6 interworking in the ACS context has been presented.
D.3.3. IP Emulator and scenarios definition this document (Confidential), details the features of the AB4Rail emulator to be used for transport/application protocol assessment to be carried out in the next Task 3.4 in the WP3 of the AB4Rail project. It also describes the main features of the software library developed in AB4Rail project to implement the IP-link emulator. The library allows setting the Linux OS lightweight virtual machines to emulate routers, switches, and links between two network elements and to emulate the main features of the on-board and the network ACS gateways.
D3.4 Identification of transport protocol for railway applications evaluates the communication transport protocols for the selected traffic sources in different rail scenarios. Considered transport protocols are TCP with cubic and BBR versions, UDP and SCTP, while sources are Constant Bit Rate, Variable Bit Rate and file transfer. The analysis is implemented in three realistic rail scenarios served by LTE or WiFi: the Roma–Firenze high-speed line (as mainline environment); the Roma–Firenze regional line (as regional/freight line); Metro of Rome (as metro/urban line).
D3.5 “Analysis of options for transport and application protocols and of their secure versions”. It is dedicated to the analysis of options for transport and application protocols. For example, it evaluated HTTP/HTTPS over TCP with BBR or with Cubic congestion protocol, over the SCTP and QUIC protocols. Furthermore, TLS is also considered for providing security in HTTP and FTP transmissions.
D4.1 Dissemination and Exploitation plan (Confidential). This document presents the Plan for the Exploitation and Dissemination of Results (PEDR) of the AB4Rail project; it also provides a summary of the dissemination objectives and the identified stakeholders and users. The AB4Rail project dissemination plan is detailed, first setting the dissemination and exploitation objectives and principles, then outlining details on dissemination actions. The ultimate goal of the overall dissemination and exploitation strategy would be to generate interest about the project and to put the basis for the application and uptake of its findings in its field of research and innovation after it ends.
D4.2 Data Management plan (Confidential). The document provides the main approach, principles, tools and methodologies adopted by the partners of the AB4Rail project, concerning the research dataset generated and collected within the project. The Data Management Plan (DMP) of AB4Rail project is based on the Horizon 2020 DMP Guidelines.
