A traffic distribution scheme for 5G resilient backhauling using integrated satellite networks

Abstract

-Resilience and high availability are being considered as essential requirements in 5G networks. To fullfil these requirements, the integration of a satellite component within mobile backhaul networks is regarded as a compelling proposition to provide backup connectivity to critical cell sites and divert traffic from congested areas so that a limited capacity in their terrestrial links could be supplemented during peak-time or even replaced in case of total/partial failure or maintenance. Sustained in an architectural framework that enables the integration and management of the satellite capacity as a constituent part of a SDN-based traffic engineered mobile backhaul network, this paper develops and assesses a traffic distribution strategy that exploits the dynamically steerable satellite capacity provisioned for resilience purposes to maximize a network utility function under both failure and non-failure conditions in the terrestrial links.

SDN-based traffic engineering for improved resilience in integrated satellite-terrestrial backhaul networks

“…the higher delay incurred when using a satellite link can result in some level of service degradation that is reflected with a lower utility). As justified in [17], the utility of stream flows, referred to as Guaranteed Bit Rate (GBR) flows in the following, is characterised by a step function, with a maximum unit utility per flow achieved at bit rate R GBR . On the other hand, the utility of elastic flows, referred to as Non GBR flows (N-GBR), is a logarithmic function as commonly done for this type of traffic [18], with a maximum unit utility per flow achieved at bit rate R N-GBR .…”

Shared Access Satellite-Terrestrial Reconfigurable Backhaul Network Enabled by Smart Antennas at MmWave Band

“…The key enablers of the SANSA solution are a novel hybrid network management scheme that makes the most efficient use of all network resources coming from the terrestrial and satellite segments, and smart antennas providing network topology reconfiguration and spatial interference mitigation. Satellite backhaul of isolated cells is already a reality, but the seamless integration of the satellite in terrestrial backhaul networks has received very limited and recent attention [5]. Similarly, the consideration of topology reconfiguration in wireless backhaul networks has been discussed recently in the context of small cells [6].…”