New SANSA deliverables available

Deliverables 2.4, 2.5, 3.1, 3.2, 4.2, 4.3, 4.4, 5.1 and 7.2 of the SANSA are now available.

Deliverable 5.1 "Detailed simulation and benchmark of antenna architectures"  This deliverable concludes the work of the SANSA project on smart antennas, which are one of the key enablers of the SANSA system. Different designs of hybrid analog‐digital arrays, leaky‐ wave and metasurface antennas, and parasitic antenna arrays are proposed, simulated and even measured. Their comparison pointed again the hybrid analog‐digital arrays as the most suitable candidate for a SANSA system. Based on this, the design fabrication and test of a hybrid analog‐  digital array prototype, which constitutes deliverable 5.2 of SANSA project, is described.

Deliverable 4.4 "Multicast beamforming for distribution of popular multimedia content towards the terrestrial distribution network"  focuses on the description and performance evaluation of the techniques that have been developed in Task 4.3 in order to enable the efficient delivery of multimedia content over the hybrid satellite‐terrestrial backhaul network considered in SANSA. The core of this work focuses on the utilisation of the satellite multicasting communication paradigm, as a means to allow the distribution of popular multimedia content towards the terrestrial content delivery network (CDN) in an effective manner. More specifically, in this Deliverable is described a framework that facilitates the identification of satellite multicast transmission opportunities, the allocation of the corresponding communication resources (carriers / bandwidth), and the scheduling of the satellite multicast transmissions. In addition, it is proposed a multi‐group multicast precoding scheme for a multi‐beam full frequency re‐use setup with a number of distributed partially cooperating (i.e. exchanging channel state information (CSI) but not user data) satellite gateways (GW). Building on this work, we also present a hybrid satellite‐terrestrial proactive caching scheme that enables usto further improve the efficiency of content delivery (in terms of data transport delay, throughput, backhaul / core network bandwidth usage, and content servers load). Furthermore, we propose several cooperative and stand‐alone reactive caching techniques that complement the aforementioned proactive caching strategy. Some of these reactive caching variants have also the ability to enable opportunistic joint transmission (JT) through the exploitation of the data stored at the different caching nodes. The numerical simulation results indicate substantial performance gains associated with the abovementioned multicast precoding and proactive / reactive caching methods.

Deliverable 4.3 "Hybrid Network Management design and simulations results"  contains the final design and simulation results of the resulting Hybrid Network Manager. In particular, we provide the final design and simulations of all the algorithms embedded in the SANSA architecture: Intelligent Backhaul Nodes (IBN) with routing, traffic classification and energy efficiency agents, the Hybrid Network Manager (HNM) embedding topology management algorithms and its interaction with the SANSA operator for the proper management of the hybrid satellite-terrestrial backhaul. Simulation results reveal the remarkable advantages of a SANSA network: when compared to a non-SANSA network: 37% in energy efficiency, up to 35% in terms of aggregated throughput, and up to 150% in terms of packet latency.

Deliverable 7.2 "Standardisation report" covers dissemination and contribution to standardisation bodies and technical platforms in order to support an anchoring of SANSA results. The main contributions are envisioned to 3GPP and ETSI working groups. This deliverable reflects the status of task 7.2 so far and its main focus is to present the standardisation strategy of the SANSA consortium, the targeted standardisation bodies, the work performed regarding standardisation contributions so far as well as the standardisation plans for the remainder of the project.

Deliverable 4.2 "Interoperability of terrestrial and satellite links: high-level functional specification" contains the outcome of Task 4.1 “Interoperability of terrestrial and satellite links”. It provides the functional description for the main elements involved in the SANSA environment, The hybrid Network Manager (HNM) and the Intelligent Backhaul Node(IBN). Furthermore, a full description for the main interoperability scenarios possible are presented. Determine the interactions between these main functionalities present at HNM and IBN level with the rest of the elements present in SANSA environment under these interoperability scenarios will be the focus of the analysis.

Deliverable 2.4 "Requirements specification for the key enabling components" contains the outcome of Task 2.5 “Requirements Specification for the Key Enabling Components”. It specifies the requirements for the main components of SANSA such as the smart antennas, the intelligent backhaul node and the hybrid network manager by considering as underlying documents papers and reports beyond the SoTA.

Deliverable 2.5 "Theoretic benchmark of key performance indicators (KPIs)" contains the outcomes of Task 2.6. It includes the theoretical benchmark and upper bounds of the KPIs defined in Task 2.4.

Deliverable 3.1 "MAC Layer Delay, Rate and Packet Error Rate vs SINR" contains an intermediate outcome of task T3.4. It provides a revision of the basic medium access control (MAC) mechanisms that are considered in both the terrestrial and satellite systems. Additionally, overview of the standards considered by SANSA in both terrestrial and satellite transmission. This deliverable anticipates the technical deliverable of T3.4 to provide the performance of the different systems based on these standards. This performance data will be used in WP4 for the design of the hybrid terrestrial-satellite backhaul adaptive network. Moreover, MAC requirements of the SANSA network are highlighted in relation with current mechanisms used in terrestrial and satellite systems.

Deliverable 3.2 "MAC layer mechanisms and adaptations for Hybrid Terrestrial-Satellite Backhauling"  contains studies and results of Task 3.4 MAC Layer Mechanisms and Adaptations which intends to describe the MAC layer mechanisms that enable the hybrid terrestrial-satellite system. The deliverable focuses on investigating an efficient random access techinque for access request at the satellite link based on Direct Sequence Spread Spectrum (DSSS) together with Slotted Aloha scheme and also focuses on the cross-layer design of the flow control and link scheduling for the hybrid backhauling network. The benefits of applying the different proposed schemes are analyzed and exploited in this report.


SANSA at MWC 2017

Once again SANSA was present at the Mobile World Congress which is the world’s biggest mobile industry event. In the 2017 edition, it counted with more than 108,000 attendees, 2,300 exhibitors and it was covered by 3,500 members of the international press and media.

SANSA activities where communicated through the CTTC’s booth which showed a video promoting SANSA hybrid routing solutions. In addition, a SANSA factsheet was distributed to all interested attendees.

SANSA Project co-organized a workshop at FITCE 2016 congress in Athens, Greece

Workshop on advanced backhauling technologies, impact of SDN and NFV

This workshop was focussed on the output from the SANSA and VITAL projects and consisted of two overview papers followed by an examination of the results, challenges, architectures from these research projects.

Maria Guta looked at combining the strength of satellite and terrestrial networks to deploy 5G. It was noted that 5G has to incorporate satellite technologies and a review of satellite technologies was given.

Dr. Anastasios Kourtis who participates in the VITAL project presented the impact of SDN and NFV implementation in the telecommunications industry. He considered the challenges posed to network operators by Over the Top (OTT) providers such as Netflix. He considered that NFV facilitates the deployment of new services, through the Virtual Network Function VNF, which is the executable code that permits this.

The role of converged satellite and terrestrial backhauling for 5G networks was examined by George Agapiou and Panagiotis Matzoros. The key question was how can satellite help provide commercially viable back hauling as it is dealt in SANSA project. 

Constantinos Papadias considered two strategies, when he described beam selection strategies for multiuser cellular networks with limited feedback. This affects the wireless access network and exploits multiuser diversity.