Study and Implementation of Switching and Beam-Hopping Tchniques in Satellites with On Board Processing

Pecorella, Tommaso; Fantacci, Romano; Lasagni, Cristina; Rosati, Laura; Todorova, P.

doi:10.1109/iwssc.2007.4409417

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…One possible solution of the full spectrum reutilization is to separate the cells illuminated by small beams in time domain (one beam illuminates only one cell at one time), which is called beam hopping (BH) [1][2][3][4][5][6][7][8][9][10][11]. Additional welfare of this technology is that less payload is needed to perform the same communication task, because less beams are needed.…”

Section: Introductionmentioning

confidence: 99%

“…Several United States Patents [4][5][6] are also on the topic, greatly promoting the related researches. Pecorella proposes an implementable system scheme of beam hopping for DVB-RCS in [7] while J. Anzalchi performs detailed system simulation and performance comparison with non-hopped systems in [8]. Jiang proposes two novel capacity optimization approaches considering the power and carrier allocation in [9], and shows that BH system turns out better than multi-beam non-orthogonal frequency reuse system especially for non-real time services.…”

Section: Introductionmentioning

confidence: 99%

“…To accomplish such delay fairness through resource allocation is just the work we consider here. The delay fairness problem has been mentioned in [7], but no time slot allocation algorithm is given there. Intuitively, processing all cells' packets in the first-come-first-serve (FCFS) mode could achieve ideal delay fairness, but the beam hopping which is a physical technology involving power amplifying and time synchronization cannot act so fast like the packet scheduling technology [16].…”

Section: Introductionmentioning

confidence: 99%

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QoS-equilibrium slot allocation for beam hopping in broadband satellite communication systems

Han

Zheng

Huang³

et al. 2015

Wireless Netw

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In broadband satellite communication systems, beam hopping (BH) is more and more welcome to compensate the low-power-efficiency wide beam and the lowspectrum-efficiency multiple spot beams simultaneously. As a flexible coverage method, BH demands efficient hopping strategy to reach the desired quality of service (QoS). In this paper, we consider the QoS equilibrium, in particular the delay fairness, among different cells illuminated by one hopping beam through designing the hopping strategy on the condition of capacity satisfaction. Due to the physical limitation that hopping speed is much slower than packet arrival speed, the ideal first-come-first-serve packet scheduling is not realizable, which compels us to pursuit the optimal slot scheduling instead. In this paper, we consider a long-term delay fairness problem by perperiod slot allocation for BH, using instantaneous and statistical information. To deal with the complex stochastic programming problem, we introduce the time-sharing principle to uncouple the variables and adopt stochastic gradient theory to deduce the suboptimal close-form solution. Our contributions are in three folds: firstly, it is the first time to consider the delay fairness not the traditional capacity fairness for BH; secondly, a general per-period decision scheme is proposed for the unique slot allocation in the perspective of queuing; thirdly, a suboptimal closeform solution for the per-period slot allocation is obtained, which could also cope with burst traffic cases. In simulation, we verify our method's advantage in terms of delay fairness comparing with the existing similar works.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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QoS-equilibrium slot allocation for beam hopping in broadband satellite communication systems

Han

Zheng

Huang³

et al. 2015

Wireless Netw

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“…There are some precedents of resource allocation optimization techniques for satellite systems. In [4], [5], the authors investigate the dynamic bandwidth allocation techniques, and in [6] the authors propose a quasi-optimal solution to manage the frequency slots allocation to service providers, however, the results are only for the satellite uplink. A power allocation policy is proposed in [7], which suggests to stabilize the system based on the amount of unfinished work in the queue and the channel state, and a routing decision is made for the maximum total throughput.…”

Section: Introductionmentioning

confidence: 99%

Multibeam satellite frequency/time duality study and capacity optimization

Jiang

Vázquez-Castro

2011

J. Commun. Netw.

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Abstract-In this paper, we investigate two new candidate transmission schemes, Non-Orthogonal Frequency Reuse (NOFR) and Beam-Hoping (BH). They operate in different domains (frequency and time/space, respectively), and we want to know which domain shows overall best performance. We propose a novel formulation of the Signal-to-Interference plus Noise Ratio (SINR) which allows us to prove the frequency/time duality of these schemes. Further, we propose two novel capacity optimization approaches assuming per-beam SINR constraints in order to use the satellite resources (e.g. power and bandwidth) more efficiently. Moreover, we develop a general methodology to include technological constraints due to realistic implementations, and obtain the main factors that prevent the two technologies dual of each other in practice, and formulate the technological gap between them. The Shannon capacity (upper bound) and current state-of-the-art coding and modulations are analyzed in order to quantify the gap and to evaluate the performance of the two candidate schemes. Simulation results show significant improvements in terms of power gain, spectral efficiency and traffic matching ratio when comparing with conventional systems, which are designed based on uniform bandwidth and power allocation. The results also show that BH system turns out to show a less complex design and performs better than NOFR system specially for non-real time services.

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“…In addition to security issues, the efficient resources management is also important for the SATCOM systems, e.g., bandwidth and power allocation. The authors n [9], [10] investigate the dynamic bandwidth allocation techniques for satellite systems. For the power control techniques in the satellite scenario, a power allocation policy is proposed in [5], which suggests to stabilize the system based on the amount of packets in the queue and the channel state, and a routing decision is made for the maximum total throughput.…”

Section: Introductionmentioning

confidence: 99%

Secure Satellite Communication Systems Design With Individual Secrecy Rate Constraints

Jiang

Han

Vázquez-Castro

et al. 2011

IEEE Trans.Inform.Forensic Secur.

114

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In this paper, we study multibeam satellite secure communication through physical (PHY) layer security techniques, i.e., joint power control and beamforming. By first assuming that the Channel State Information (CSI) is available and the beamforming weights are fixed, a novel secure satellite system design is investigated to minimize the transmit power with individual secrecy rate constraints. An iterative algorithm is proposed to obtain an optimized power allocation strategy. Moreover, sub-optimal beamforming weights are obtained by completely eliminating the co-channel interference and nulling the eavesdroppers' signal simultaneously. In order to obtain jointly optimized power allocation and beamforming strategy in some practical cases, e.g., with certain estimation errors of the CSI, we further evaluate the impact of the eavesdropper's CSI on the secure multibeam satellite system design. The convergence of the iterative algorithm is proven under justifiable assumptions. The performance is evaluated by taking into account the impact of the number of antenna elements, number of beams, individual secrecy rate requirement, and CSI. The proposed novel secure multibeam satellite system design can achieve optimized power allocation to ensure the minimum individual secrecy rate requirement. The results show that the joint beamforming scheme is more favorable than fixed beamforming scheme, especially in the cases of a larger number of satellite antenna elements and higher secrecy rate requirement. Finally, we compare the results under the current satellite air-interface in DVB-S2 and the results under Gaussian inputs. Index TermsMultibeam satellite, beamforming, physical layer security, and power allocation.

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Study and Implementation of Switching and Beam-Hopping Tchniques in Satellites with On Board Processing

Cited by 7 publications

References 3 publications

QoS-equilibrium slot allocation for beam hopping in broadband satellite communication systems

QoS-equilibrium slot allocation for beam hopping in broadband satellite communication systems

Multibeam satellite frequency/time duality study and capacity optimization

Secure Satellite Communication Systems Design With Individual Secrecy Rate Constraints

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