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Spectrum Allocation and Performance Analysis for backhauling of UAV Assisted Cellular Network

China Communications 2019年第8期16卷 72-81页

作者： Lei Ji Jingran Chen Zhiyong Feng Key Laboratory of Universal Wireless Communications Ministry of Education Wireless Technology Innovation Institute (WTI)Beijing University of Posts and Telecommunications

To reinforce the coverage and QoS(quality of service) of on-ground cellular communication system, unmanned aerial vehicles which are carrying small cells are deployed in some emergency and disaster areas. Although ASCs(aerial small cells) can provide a higher probability of LoS(line-of-sight) transmission, the wireless backhaul link will bring extra interference to the whole system if not well designed. Therefore, in this paper, we study the backhaul scheme for UAV-assist cellular network. We first analyze the interference environments of UAV-assist cellular network considering the IBOG(In-Band to On-Ground), OBOG(Out-of-Band to On-Ground) and IBTU(In-Band to Tethered-UAV) backhauling mode, and give the descriptions of the performance metrics for each mode. Then, the considered problem is formulated as an optimization of achievable rate. We derive the optimal solutions for the involved three backhauling modes for ASCs respectively, and closed-form optimal value for each mode is acquired with proof. We also give a pseudo-code form of our proposed optimal access/backhaul spectrum allocation algorithm. The simulation results indicate that the proposed scheme can deliver a significant gain, while IBTU performs best among proposed backhauling modes.

关键词： UAV backhauling spectrum allocation

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Efficient Interference Mitigation in mmWave Backhaul Network for High Data Rate 5G Wireless Communications

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International Journal of Communications, Network and System Sciences 2017年第5期10卷 170-180页

作者： Jia Shi Qiang Ni Claudio Paoloni Francois Magne Lancaster University Lancaster UK When-AB S.A. Paris France

This paper investigates the performance of the W band millimeter wave (mmWave) backhaul network proposed by our EU TWEETHER project. We focus on the downlink transmission of the mmWave backhaul network, in which each of the hubs serves a cluster of base stations (BSs). In the considered backhaul network, available frequency resources are first allocated to the downlink links with the consideration of fairness issue. In order to mitigate interference in the mmWave backhaul network, each hub operates the proposed algorithm, namely cooperation and power adaptation (CPA). Our simulation results show that, the backhaul network with mmWave capabilities can achieve a significant better throughput performance than the sub-6 GHz ultra high frequency (UHF) backhaul network. Furthermore, our simulations also reveal that the proposed CPA algorithm can efficiently combat interference in the backhaul network.

关键词： mmWave Communication backhauling Interference Mitigation

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