Flexible capacity and traffic management for hybrid satellite-terrestrial mobile backhauling networks

Abstract

The unique wide-scale geographical coverage offered by satellite networks, coupled with its inherent broadcast/multicast capabilities and highly reliable connectivity, anticipates new opportunities for the integration of the satellite component into the 5G ecosystem. One of the most compelling scenarios is mobile backhauling, where satellite capacity can be used to complement the terrestrial backhauling infrastructure, not only in hard to reach areas, but also for more efficient traffic delivery to radio access network (RAN) nodes, increased resiliency and better support for fast, temporary cell deployments and moving cells. In this context, this paper proposes a model for the analysis of capacity and traffic management strategies in hybrid satellite-terrestrial mobile backhauling networks that rely on\ud Software Defined Networking (SDN) for fine-grained traffic steering. Numerical results are provided to assess the capacity gains that can be achieved when the satellite backhaul capacity is used for traffic overflow, taking into account the placement of the satellite capacity at different traffic aggregation levels and the spatial correlation of the traffic demand.Peer ReviewedPostprint (published version

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

“…Table II provides the range of values considered for the different model parameters in the numerical assessment. With regard to the capacity of the terrestrial links, the considered setting (131 Mb/s) is based on the dimensioning analysis presented in [17] to cope with the 90-th percentile of the traffic demand when considering a realistic traffic model that exhibits a log-normal distribution with an average load of 100 Mb/s per BS. This value is then considered to establish the range of values for the maximum aggregate satellite capacity (C S ) according to the adopted resilience scheme.…”

“…Building in the utility framework model for the analysis of traffic distribution strategies and the capacity dimensioning results presented in our previous work [17], this paper develops and assesses the performance of a traffic management strategy designed to cope with a satellite capacity provisioned to improve the resilience of a hybrid satelliteterrestrial mobile backhaul network. Unlike more basic strategies that might be devised for simply replacing a failed terrestrial link with satellite capacity or just activating traffic overflowing through satellite in high demanding peak-times, the proposed scheme pursues an optimal allocation of the available satellite and terrestrial capacity so that a network utility is maximized under both failure and non-failure terrestrial links conditions.…”

Power and Flow Assignment for 5G Integrated Terrestrial-Satellite Backhaul Networks

“…By assuming the approximations proposed in (9) and (11), the problem (6) is convexified. Note that the constraint on the transmit power 0 ≤ P ≤ P max translates into 0 ≤ e Q ≤ P max which remains strictly convex in the new variable Q .…”

“…In order to improve the capacity of mobile wireless backhaul networks, the concept of a seamlessly Integrated Satellite-Terrestrial Backhaul Network (ISTB) capable of jointly exploiting the terrestrial and satellite links depending on the traffic demands has been recently proposed [8], [9]. In order to improve the spectrum efficiency of such networks, aggressive frequency reuse in the Ka band between terrestrial and satellite links have been investigated in [10], [11].…”

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

“…Table III provides the range of values considered for the traffic load generation and network model parameters in the numerical assessment. With regard to the capacity of the terrestrial links, the considered setting (131 Mbps) is based on the dimensioning analysis presented in [19] to cope with the 90-th percentile of the traffic demand when considering a realistic traffic model that exhibits a log-normal distribution with an average load of 100 Mbps per BS. This value is then considered to establish the range of values for the maximum aggregate satellite capacity (C S ).…”