SAFRON: Safe Operational Radio Network for mixed-priority communications to trains using a shared architecture.

列车到轨道通信的需求正在激增;驾驶室内信号、乘客WiFi、远程CCTV、乘客计数、电子票务和远程状态监控（RCM）、乘客信息系统（PIS）、座位预订系统、驾驶员咨询系统和许多其他应用都在争夺带宽。这些应用中的许多都需要保证优先级、安全性和/或安全完整性。传统上，为了满足这一点，这些应用具有专用的屋顶天线，路由器和网络，但列车上的空间有限，复制成本高昂。列车运营公司（TOC）提供数字连接的成本和复杂性为采用新的以数字数据为中心的服务，使列车运营更加智能化创造了障碍。SAFRON将创建共享通信架构的原型，以便任何数据-中央系统可以在确保优先级、安全性和保密性的情况下使用从列车到轨旁的相同连接。这将通过消除重复连接并使其能够更好地利用数据来降低TOC的成本。我们将探讨列车到轨旁数据的几种分类：* 公共 * 私有 * 关键任务 * 安全相关（SIL 2）我们将探讨每种应用类型的要求，包括安全性、服务质量、带宽和数据及时性。此外，由于现有的GSM-R线旁网络即将过时，我们将评估该架构对安全关键列车控制（SIL 4）的适用性。我们将考虑的通信技术包括4G LTE和新兴的5G，并选择回退到3G和GPRS技术也是为了兼容性。我们将开发和演示能够适应这些应用类型的硬件和软件系统，以满足其各自的安全性，安全性和性能要求。我们将在实验室中评估其在指示性操作和降级场景中的性能。SAFRON将允许铁路行业的所有参与者使用这个快速和无处不在的网络来支持列车和轨道旁变得更加紧密地集成-作为一个系统一起工作。SAFRON将与Apollo Rail Ltd（Apollo），TeleRail Networks Limited（TeleRail Networks）、萨里大学（Surrey），特别是萨里网络安全中心（SCCS）和5G创新中心（5GIC）以及网络铁路运营商（NR）。我们收到了来自项目利益相关者的支持信，包括运输部（DfT）、希思罗机场快线（HEx）、铁路安全和标准委员会（RSSB）、铁路信号网络

The demand for train-to-track communications are proliferating; with in-cab signalling, passenger WiFi, remote CCTV, passenger counting, e-ticketing and remote condition monitoring (RCM), passenger information systems (PIS), seat reservation systems, driver advisory systems and many other applications jostling for bandwidth.Many of these applications require guaranteed priority, security, and/or safety integrity. Traditionally to satisfy this, these applications have dedicated roof antennas, routers and networking but space on trains is restricted and duplication is costly.The cost and complexity for Train Operating Companies (TOCs) to provide digital connectivity creates a barrier to adoption of new digital data-centric services to make train operation more intelligent.SAFRON will create a prototype for a shared communications architecture such that any data-centric system can use the same connection from train-to-trackside at an assured level of priority, safety and security. This will reduce the cost for the TOC by eliminating duplicate connections and enabling them to make better use of data. We will explore several classifications of train-to-trackside data:* Public* Private* Mission-critical* Safety-related (SIL2)We will explore the requirements for each of these application types, including security, quality of service, bandwidth, and data timeliness. Furthermore, due to approaching obsolescence of the existing lineside GSM-R network, we will assess the suitability of this architecture for safety-critical train control (SIL4). Communications technologies we will consider include 4G LTE and emerging 5G, with the option for falling-back on 3G and GPRS technologies too for resilience.A hardware and software system that can accommodate these application types will be developed and demonstrated to satisfy their respective safety, security, and performance requirements.We will evaluate their performance in the lab in indicative operational and degraded scenarios. A safety and security review will be carried out on the proposed solution, and an approval strategy will be developed for certification and product approval.SAFRON will allow all players in the railway industry to use this fast and ubiquitous network to support the train and trackside to become more closely integrated - working together as one system.SAFRON will be delivered in partnership between Apollo Rail Ltd (Apollo), TeleRail Networks Limited (TeleRail Networks), University of Surrey (Surrey), specifically the Surrey Centre for Cyber Security (SCCS) and the 5G Innovation Centre (5GIC) and Network Rail Telecoms (NR).We have letters of support from project stakeholders including Department for Transport (DfT), Heathrow Express (HEx), Railway Safety and Standards Board (RSSB), and Network Rail Signalling.