The current shift toward the virtualization of network infrastructure components enables a dynamic instantiation, deployment and configuration of virtual network functions (VNFs), which can be offered "as-a-service" to multiple tenants, thus enabling 5G architectures. Simultaneously, the recent high throughput satellite (HTS) systems can play an important role in the 5G era thanks to their characteristics, such as their large coverage, fast deployment of the ground infrastructure and native broadcast/multicast broadband capabilities. In this context, this paper proposes a review of the satellite service delivery models in order to identify viable alternatives to deploy converged satellite-terrestrial services. This objective is pursued by taking as a reference a satellite-assisted IP streaming service for the enhancement of current Content Delivery Network (CDN) infrastructures, as tackled by the European Space Agency within the SHINE ("Secure Hybrid In Network caching Environment") project. SHINE aims at efficiently extending terrestrial CDN services to satellite-enabled scenarios, by designing innovative mechanisms for the secure distribution of real-time multimedia information across hybrid channels, leveraging both unicast and multicast communication paradigms. The original contribution of the paper is the analysis of satellite architectures and configurations tailored to efficiently support the SHINE solution, together with a high-level applicability assessment taking into account different satellite-enabled service models.

中文翻译：

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融合卫星地面5G网络部署的服务交付模型：卫星辅助CDN用例

当前向网络基础架构组件虚拟化的转变实现了虚拟网络功能（VNF）的动态实例化，部署和配置，可以将这些服务作为“一项服务”提供给多个租户，从而实现5G架构。同时，由于其高覆盖率，地面基础设施的快速部署以及本地广播/多播宽带功能等特性，最近的高吞吐量卫星（HTS）系统可以在5G时代发挥重要作用。在这种情况下，本文提出了对卫星服务交付模型的回顾，以便确定可行的替代方案来部署融合的卫星地面业务。通过将卫星辅助IP流传输服务作为参考来实现此目标，以增强当前的内容交付网络（CDN）基础结构，以达到这一目标，这是由欧洲航天局在SHINE（“网络缓存环境中的安全混合”）项目中解决的。 。SHINE旨在通过设计创新机制，利用单播和多播通信范式在混合信道上安全分发实时多媒体信息，从而有效地将地面CDN服务扩展到具有卫星功能的场景。该论文的最初贡献是对为有效支持SHINE解决方案而量身定制的卫星体系结构和配置的分析，以及考虑了不同的启用卫星的服务模型的高级适用性评估。