Cooperative Beam Association and Power Allocation in UD-LEO Satellite Communication Networks: A Spectrum Sharing Manner

Tong, Jianfei; Wang, Cheng; Zhao, Xiaoyan; Cui, Gaofeng; Wang, Weidong

doi:10.3390/electronics11030299

Cited by 5 publications

(2 citation statements)

References 13 publications

(21 reference statements)

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“…Determination of the minimum separation angle needed to prevent objectionable interference will have to consider transmit powers and antenna gains of existing and proposed GSO and NGSO systems [6], [7]. There has been some early work on NGSO-to-GSO interference [8], [9], but as pointed out in [7], this work does not consider dense NGSO deployments like the ones that are now in operation and planned.…”

Section: Radio Interferencementioning

confidence: 99%

Feasibility of Using Beam Steering to Mitigate Ku-Band LEO-to-GEO Interference

2022

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Low-Earth orbiting (LEO) satellites now hold promise to provide broadband service anywhere in the world, but they must share the radio spectrum with geosynchronous Earth-orbiting (GEO) satellites. The United Nations International Telecommunications Union (ITU) and the U.S. Federal Communications Commission (FCC) require that operators of LEO satellite systems avoid interfering with GEO satellite systems even though both use the same bands within the radio spectrum. Such interference can occur when a LEO satellite passes through an area between a GEO earth station and its intended GEO satellite. This is called an in-line event. In this paper we develop a first order estimate of the probability of occurrence of such an event, an indication that Ku-band LEO-to-GEO interference is a serious problem. We describe the use of beam steering to mitigate such interference and consider its feasibility for currently deployed LEO constellations. We find that beam steering appears to be a practical and effective approach for a LEO constellation that has this capability and uses sufficiently narrow beams. INDEX TERMSCommunication satellite, in-line event, interference, LEO, NGSO FIGURE 1. LEO satellites (shown in red) orbit at a much lower altitude than GEO satellites (shown in black) at 35,000 km.

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Section: Radio Interferencementioning

confidence: 99%

Feasibility of Using Beam Steering to Mitigate Ku-Band LEO-to-GEO Interference

2022

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“…The multi-satellites relay systems based on time division multiple access (TDMA) and non-orthogonal multiple access (NOMA) were introduced in [11]. In [12,13], spectrum sharing and cooperative technology were considered in the LEO-GEO co-existing systems, which can solve the interference issue between different satellites. In addition, a cooperative LEO satellites system was studied in [14,15].…”

Section: Introductionmentioning

confidence: 99%

Dual Stream Transmission and Downlink Power Control for Multiple LEO Satellites-Assisted IoT Networks

et al. 2022

Sensors

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The multi-satellites cooperative transmission can effectively increase the data rate that can be achieved by internet of things (IoT) terminals. However, the dynamic characteristics brought by low Earth orbit (LEO) satellites will seriously decrease the data rate and make the data rate fluctuate. In this paper, dual-stream transmission and downlink power control for multiple LEO satellites-assisted IoT networks are investigated. To mitigate the effects of the frequency offset caused by different LEO satellites, a multi-satellites synchronization scheme is proposed. Then, different power control schemes are given to resist the data rate fluctuation during the transmission. The simulation results show that the proposed schemes can effectively compensate for the varied frequency offset and keep the data rate stable.

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A serious gaming approach for optimization of energy allocation in CubeSats

Almalki

Angelides

2023

Multimed Tools Appl

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Energy consumption remains an open challenge in aerial systems such as CubeSats and therefore optimization of its allocation is a top priority for maximizing operational capacity. Our research review reveals a plethora of approaches for optimization of energy allocation and all achieving varying degrees of success and not without any compromises. In this paper, we exploit the use of serious gaming in a novel energy allocation algorithm that aims at minimizing energy consumption to maximize the utilities of both CubeSats and terrestrial sensors. To demonstrate this, we use Stackelberg for serious gaming and standalone topology for CubeSat configuration. The experimental results show that the use of a Stackelberg game approach for optimization has led to reduction in the required transmission energy in sensors, an improved link performance between the CubeSat and ground sensors, and an increase in network lifetime and performance without resorting into sensor power enhancements or other external power sources. The overall average operational capacity improvement predictions range between 22 to 27% across all performance indicators of energy efficiency across RF chains of link budgets.

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Cooperative Beam Association and Power Allocation in UD-LEO Satellite Communication Networks: A Spectrum Sharing Manner

Cited by 5 publications

References 13 publications

Feasibility of Using Beam Steering to Mitigate Ku-Band LEO-to-GEO Interference

Feasibility of Using Beam Steering to Mitigate Ku-Band LEO-to-GEO Interference

Dual Stream Transmission and Downlink Power Control for Multiple LEO Satellites-Assisted IoT Networks

A serious gaming approach for optimization of energy allocation in CubeSats

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