# A Review of SATis5: Perspectives on Commercial and Defense 5G SATCOM Integration
## 4 Overview of Recent and Existing Commercial SATis5 Testbeds and Projects
### eMBB EU-Commissioned SatT5G Project  
The \"EU-commissioned Satellite and Terrestrial Networks for 5G\" (SaT5G, a.k.a. SATis5) project started in 2017 with a focus on implementing eMBB with satellite networks. Reference [14] has defined four eMBB use cases addressing aspects of these use cases related to extending 5G coverage to full global coverage. The four SaT5G use cases are defined as follows:  
* SaT5G Use Case 1: as described in [14], this use case provides \"edge delivery\" and \"offload\" for \"multimedia content\" and \"Multi-access Edge Computing\" (MEC) \"virtual network function\" (VNF) software addressing multicast, caching of content to the \"edge\" and update of 5G network software;
* SaT5G Use Case 2: Provides fixed cell 5G backhaul, i.e., 5G backhauling of remote fixed cell sites;
* SaT5G Use Case 3: Provides 5G to the premises with hybrid multi-play, i.e., delivery of content, e.g., video streaming, using a combination of satellite and terrestrial 5G networks;
* SaT5G Use Case 4: Provides moving platform backhaul, i.e., 5G backhauling from mobile platforms such as ships, aircraft, and land vehicles. To demonstrate the above four use cases, the SaT5G project has successfully designed and deployed several satellite-based, specific VNFs on \"OpenStack and Kubernetes\" for incorporation into the SaT5G testbed. This testbed is an integrated SATis5 architecture that allows satellite links to carry \"5G network slices\" seamlessly. The testbed results for the first three use cases are reported in [14] and an overview of the testbed and associated results are presented in this section. Whereas the final use case was demonstrated in a companion testbed at Zodiac Aerospace in Munich. A multicast/caching MEC testbed was developed to demonstrate Use Case 1 [14]. This demo showed a multicast adaptive bit rate (mABR) use case based on a 5G MEC-enabled platform for Content Distribution Networks (CDN) integration and efficient edge content delivery via satellite developed by Broadpeak mABR software products and nanoCDN agent. Figure 8 illustrates a SaT5G testbed framework for Use Case 1. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**SATis5 Use case** & \begin{tabular}{c} **SATis5 PoC Testbed Use** \\ **Case Description** \\ \end{tabular} & **Results** & **Conclusion** \\ \hline \multirow{3}{*}{Use Case 1} & 5G core network integrated & Demonstrated capability to & Low overhead integration of \\  & with satellite backhaul network & leverage COTS 5G core & satellite in existing telecom \\  & operating as 5G network & network capabilities to & networks; Open-up satellite \\  & & manage a satellite network & Industry to the 3 GPP ecosystem. \\ \hline \multirow{3}{*}{Use Case 2} & Large amount of video delivery & Delivery time delay: & Very high efficiency using \\  & using satellite backhaul network & - First video—788 ms & the satellite broadcasting \\  & & - Next videos—3 ms & and edge caching \\ \hline \multirow{3}{*}{Use Case 3} & \begin{tabular}{c} Nomadic node for movable \\ connectivity islands with \\ satellite backhaul \\ \end{tabular} & Instant network availability at & \begin{tabular}{c} Easy to initiate, cost-effective \\ connectivity when and \\ wherever needed \\ \end{tabular} \\ \hline \multirow{3}{*}{Use Case 4} & mMTC-NB-IoT data & \
\begin{tabular}{c} Non-time critical data U/L: \\ - 287 ms delay \\ - 0.02\% packet loss \\ \end{tabular} & Highly reliable support \\  &
\begin{tabular}{c} Integrated multi-orbit satellite \\ systems providing global \\ service flexibility \\ \end{tabular} & Demonstrated seamless traffic & Integrated multi-orbit satellite \\  & systems providing global & handover between & systems provide greater \\  & & multi-orbit systems & service flexibility \\ \hline \hline \end{tabular}
\end{table} 
Table 4: A Summary of Some Key SATis5 PoC Testbed Results. A multiclient video streaming with a 5G multilinking testbed was designed to demonstrate Use case 2.