Joint Optimization of Beam-Hopping Design and NOMA-Assisted Transmission for Flexible Satellite Systems

Wang, Anyue; Lei, Lei; Lagunas, Eva; Pérez-Neira, Ana I.; Chatzinotas, Symeon; Ottersten, Björn

doi:10.1109/twc.2022.3170435

Cited by 16 publications

(10 citation statements)

References 37 publications

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“…Hence the impact of imperfect channel state information (ipCSI) on the performance of U-NOMA-BH systems should be considered. The authors of [39] proposed a greedy algorithm to solve the mixed integer non-convex programming (MINCP) for PD-NOMA-based BH systems. From practical considerations, considering only the PD-NOMA-BH system may lead to the low utilization of satellite carrier resources.…”

Section: A Motivation and Contributionsmentioning

confidence: 99%

“…In section V-A, the satellite is designated to cover the equatorial ground region. The LEO coverage and users demand data are based on [39,51]. The satellite parameters and the number of beams refer to 3GPP TR 38.811 [52].…”

Section: Throughput Analysesmentioning

confidence: 99%

“…The authors of [38] investigated minimizing traffic matching errors by jointly optimizing time slots and power allocation. Inspired by this point, the upper-bound approach and lower-bound approach have been highlighted through an efficient boundary way in [39].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Unified NOMA Framework in Beam-Hopping Satellite Communication Systems

Zhang

Yue

Tian

et al. 2023

IEEE Trans. Aerosp. Electron. Syst.

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This paper investigates the application of a unified non-orthogonal multiple access framework in beam hopping (U-NOMA-BH) based satellite communication systems. More specifically, the proposed U-NOMA-BH framework can be applied to code-domain NOMA based BH (CD-NOMA-BH) and power-domain NOMA based BH (PD-NOMA-BH) systems. To satisfy dynamic-uneven traffic demands, we formulate the optimization problem to minimize the square of discrete difference by jointly optimizing power allocation, carrier assignment and beam scheduling. The non-convexity of the objective function and the constraint condition is solved through Dinkelbach's transform and variable relaxation. As a further development, the closed-from and asymptotic expressions of outage probability are derived for CD/PD-NOMA-BH systems. Based on approximated results, the diversity orders of a pair of users are obtained in detail. In addition, the system throughput of U-NOMA-BH is discussed in delay-limited transmission mode. Numerical results verify that: i) The gap between traffic requests of CD/PD-NOMA-BH systems appears to be more closely compared with orthogonal multiple access based BH (OMA-BH); ii) The CD-NOMA-BH system is capable of providing the enhanced traffic request and capacity provision; and iii) The outage behaviors of CD/PD-NOMA-BH are better than that of OMA-BH.

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Section: A Motivation and Contributionsmentioning

confidence: 99%

Section: Throughput Analysesmentioning

confidence: 99%

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A Unified NOMA Framework in Beam-Hopping Satellite Communication Systems

Zhang

Yue

Tian

et al. 2023

IEEE Trans. Aerosp. Electron. Syst.

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“…In Reference [ 19 ], the authors exploited the time-space-domain flexibility and power-domain flexibility of Non-Orthogonal Multiple Access (NOMA), and jointly optimized a beam-hopping scheduling, slot assignment of users, and power allocation to satisfy the traffic demand as much as possible.…”

Section: Introductionmentioning

confidence: 99%

Improved Spread Spectrum Aloha Protocol and Beam-Hopping Approach for Return Channel in Satellite Internet of Things

Gou¹,

Bian

Dong³

et al. 2023

Sensors

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This paper examines potential performances of the Spread Spectrum-based random access technique and proposes an Improved Spread Spectrum Aloha (ISSA) protocol for the return channel in satellite Internet of Things (IoT) based on the beam-hopping technique. The key design driver and detailed solution of ISSA protocol are presented in this work and it is shown that the proposed protocol achieves high throughput and low collision probability. To match user/traffic distribution, delay requirement and channel condition with beam allocation better, a low-complexity heuristic beam scheduling algorithm and a more effective Maximum-Weighted Clique (MWC) algorithm have been proposed. The heuristic algorithm considers the user/traffic distribution, inter-beam interference, and fairness primarily. However, the MWC algorithm gives considerations not only on above factors, but also on delay requirement and channel condition (path loss and rain attenuation) to maximize system capacity. The beam angle and interference avoidance threshold are proposed to measure the inter-beam interference, and the link propagation loss and rain attenuation are considered meanwhile in the channel condition. In the MWC algorithm, we construct an auxiliary graph to find the maximum-weighted clique and derive the weighting approach to be applied in different application scenarios. The performance evaluation of our ISSA protocol compared with the SSA protocol is presented, which achieves a gain of 16.7%. The simulation of the ISSA protocol combined with round robin, heuristic, and MWC beam scheduling for the return link in beam-hopping satellite IoTs is also provided. The results indicate that the throughput in nonuniform user distribution is much lower than in the uniform case without the beam scheduling algorithm. Through the application of the scheduling algorithm, the throughput performance can approach the uniform distribution. Finally, the degree of user satisfaction with different scheduling approaches is presented, which validates the effectiveness of heuristic and MWC algorithms.

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“…Since the computational complexity of optimization methods grew exponentially with the increasing beam numbers, these algorithms are unsuitable for the DBH pattern design in the time domain. Meanwhile, the bandwidth resource was sacrificed to simplify the design problem of the DBH pattern [28]. A bandwidth resource allocation algorithm was designed to avoid CCI among beams [29].…”

Section: Introductionmentioning

confidence: 99%

Time‐space‐power allocation for enhanced IoT‐terminal services in cognitive satellite‐aerial networks

Yao

Fan

et al. 2023

IET Communications

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In remote and inaccessible areas, the traffic request for Internet-of-Things (IoT) terminals is growing. This paper proposes a cognitive satellite-aerial network (CSAN) to provide sufficient access services. The proposed CSAN consists of the primary beam-hopping (BH) satellite and secondary aerial-based station (ABS) systems. Since the two systems share spectrums, co-channel interference (CCI) between the two systems is complicated, and the quality of service (QoS) is seriously degraded. To improve the QoS, the dynamic BH (DBH) pattern, ABS access in the time domain, and ABS power control in the power domain are studied. First, based on the sparsity of the DBH pattern, the greedy quick tracking (GAT) algorithm is proposed to design the DBH pattern quickly. Then, subject to the DBH pattern, a greedy access monitor (GAM) algorithm is determined for timely ABS access and power control. Since each ABS only serves terminals within a suitable distance, the placement and terminal cluster of multi-ABSs in the space domain are required to ensure full terminal coverage. Thus, the mutual selection K algorithm is proposed to save required ABS numbers and improve service fairness among terminal clusters. Simulation results demonstrate the efficacy of time-space-power allocation for enhanced IoT-terminal services in the proposed CSAN.

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Joint Optimization of Beam-Hopping Design and NOMA-Assisted Transmission for Flexible Satellite Systems

Cited by 16 publications

References 37 publications

A Unified NOMA Framework in Beam-Hopping Satellite Communication Systems

A Unified NOMA Framework in Beam-Hopping Satellite Communication Systems

Improved Spread Spectrum Aloha Protocol and Beam-Hopping Approach for Return Channel in Satellite Internet of Things

Time‐space‐power allocation for enhanced IoT‐terminal services in cognitive satellite‐aerial networks

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