Smart Gateway Diversity Optimization for EHF Satellite Networks

Rossi, T.; Sanctis, Mauro De; Maggio, Fabio; Ruggieri, M.; Hibberd, Craig; Togni, Cristina

doi:10.1109/taes.2019.2917571

Cited by 28 publications

(25 citation statements)

References 31 publications

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“…problem (5) is identical to the original problem (3). Also, z opt V denotes an optimal solution of problem (5), and |V| = V ≤ K. Moreover, the following statements can be easily proven:…”

Section: Global Optimization Algorithmmentioning

confidence: 97%

“…An optimal solution z LP V of the LP relaxation (problem (6)) can be obtained in polynomial time, using interior-point methods [12]. In addition, note that: a) the feasibility of problem (5)…”

Section: Global Optimization Algorithmmentioning

confidence: 99%

“…In the sequel, we develop a greedy method to provide an upper bound on the optimum value of problem (5). This method is based on the following cost function (CF):…”

Section: Global Optimization Algorithmmentioning

confidence: 99%

“…These subproblems have the same form as problem (5), with z b = 0/1 for subproblem (7)/(8), respectively. Moreover, if g opt 0 and g opt 1 are respectively the optimum values of subproblems (7) and (8) (assuming that the optimum value of an infeasible problem equals +∞), then g(z opt V ;z C ) = min(g opt 0 , g opt 1 ).…”

Section: Global Optimization Algorithmmentioning

confidence: 99%

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Globally Optimal Selection of Ground Stations in Satellite Systems with Site Diversity

Efrem

Panagopoulos

2020

IEEE Wireless Commun. Lett.

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The availability of satellite communication systems is extremely limited by atmospheric impairments, such as rain (for radio frequencies) and cloud coverage (for optical frequencies). A solution to this problem is the site diversity technique, where a network of geographically distributed ground stations (GSs) can ensure, with high probability, that at least one GS is available for connection to the satellite at each time period. However, the installation of redundant GSs induces unnecessary additional costs for the network operator. In this context, we study an optimization problem that minimizes the number of required GSs, subject to availability constraints. First, the problem is transformed into a binary-integer-linear-programming (BILP) problem, which is proven to be NP-hard. Subsequently, we design a branch-and-bound (B&B) algorithm, with global-optimization guarantee, based on the linear-programming (LP) relaxation and a greedy method as well. Finally, numerical results show that the proposed algorithm significantly outperforms state-of-the-art methods, and has low complexity in the average case.

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“…problem (5) is identical to the original problem (3). Also, z opt V denotes an optimal solution of problem (5), and |V| = V ≤ K. Moreover, the following statements can be easily proven:…”

Section: Global Optimization Algorithmmentioning

confidence: 97%

Section: Global Optimization Algorithmmentioning

confidence: 99%

“…In the sequel, we develop a greedy method to provide an upper bound on the optimum value of problem (5). This method is based on the following cost function (CF):…”

Section: Global Optimization Algorithmmentioning

confidence: 99%

Section: Global Optimization Algorithmmentioning

confidence: 99%

See 2 more Smart Citations

Globally Optimal Selection of Ground Stations in Satellite Systems with Site Diversity

Efrem

Panagopoulos

2020

IEEE Wireless Commun. Lett.

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“…When the feeder link is moved to the Q/V bands, there is a larger bandwidth available in Ka for the user link and therefore a higher number of user beams can be assigned per gateway resulting in a reduced number of gateways. However, the use of Q/V bands in the feeder link imposes the need to introduce fade mitigation techniques using gateway diversity to overcome the attenuation caused by rain, gases and clouds [12,13].…”

Section: Introductionmentioning

confidence: 99%

Forward Link Optimization for the Design of VHTS Satellite Networks

Ortíz¹,

Martínez²,

Natera³

et al. 2020

Preprint

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The concept of geostationary VHTS (Very High Throughput Satellites) is based on multibeam coverage with intensive frequency and polarization reuse in addition to the use of larger bandwidths in the feeder links, in order to provide high capacity satellite links at a reduced cost per Gbps in orbit. The dimensioning and design of satellite networks based on VHTS imposes the analysis of multiple trade-offs to achieve an optimal solution in terms of cost, capacity and figure of merit of the user terminal. In this paper, we propose a new method for sizing VHTS satellite networks based on an analytical expression of the forward link CINR (Carrier-to-Interference-plus-Noise Ratio) that is used to evaluate the trade-off of different combinations of system parameters. The proposed method considers both technical and commercial requirements as inputs including the constraints to achieve the optimum solution in terms of the user G/T, the number of beams and the system cost. The cost model includes both satellite and ground segments. Exemplary results are presented with feeder links using Q/V bands, DVB-S2X and transmission methods based on CCM and VCM (Constant and Variable Coding and Modulation, respectively) in two scenarios with different service areas.

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Multiple gateway placement in large‐scale constellation networks with inter‐satellite links

Chen

Yang

Liu

et al. 2020

Satell Commun Network

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Multiple gateways are required in large satellite constellation networks (LSCNs) with inter-satellite links (ISLs), and their placement may greatly affect the system performance. Gateway placement can be optimized to achieve better network performance under the non-uniform ground demand distribution. This paper formulates a gateway placement optimization model for LSCN with ISLs, aiming at achieving an optimal overall performance including delay, traffic peak, and load balance. The constraints of potential gateway location, gateway-satellite connectivity, and max hop-count are considered. A genetic algorithm (GA)-based method is proposed to solve the integer optimization problem with the help of quasi-evenly distributed reference layout. A Starlink-like constellation with ISLs is adopted in the simulation. The simulation results show that the optimized layout has better performance than the reference layout. Additionally, the locations with high user demand or at the middle of ocean are preferred by gateways. The network performance is jointly influenced by gateway placement, demand distribution, constellation configuration, node, and link capacities. The abnormally high ISL hop-count is found in the south Indian Ocean, which is caused by constellation and ISL configuration.

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Smart Gateway Diversity Optimization for EHF Satellite Networks

Cited by 28 publications

References 31 publications

Globally Optimal Selection of Ground Stations in Satellite Systems with Site Diversity

Globally Optimal Selection of Ground Stations in Satellite Systems with Site Diversity

Forward Link Optimization for the Design of VHTS Satellite Networks

Multiple gateway placement in large‐scale constellation networks with inter‐satellite links

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