Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700472
Ana Koren, R. Prasad
Outbreak of coronavirus (COVID-19) has resulted in lockdowns and many healthcare systems around the world getting overwhelmed. In time of pandemic, Internet of Things (IoT) and, especially, Internet of Medical Things (IoMT) can be leveraged to ease the strain put onto local hospitals and healthcare providers through preventive medicine and telemedicine. This paper offers state-of-the-art review of current use of Internet of Things within healthcare systems in the context of tackling COVID-19. It also suggests future research for battling COVID-19 through IoT, using it for purposes such as social distancing, contact tracing, health monitoring, and early diagnosing.
{"title":"Internet of Things: Shaping Healthcare during COVID-19 Pandemic","authors":"Ana Koren, R. Prasad","doi":"10.1109/wpmc52694.2021.9700472","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700472","url":null,"abstract":"Outbreak of coronavirus (COVID-19) has resulted in lockdowns and many healthcare systems around the world getting overwhelmed. In time of pandemic, Internet of Things (IoT) and, especially, Internet of Medical Things (IoMT) can be leveraged to ease the strain put onto local hospitals and healthcare providers through preventive medicine and telemedicine. This paper offers state-of-the-art review of current use of Internet of Things within healthcare systems in the context of tackling COVID-19. It also suggests future research for battling COVID-19 through IoT, using it for purposes such as social distancing, contact tracing, health monitoring, and early diagnosing.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126755811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700461
Zheng-qiang Wang, Yang Liu, Hao Zhang, Yongjun Xu, Xiaoyu Wan, Zi-fu Fan
This paper considers an unmanned aerial vehicle (UAV) as a buffer-aided mobile relay systems. A UAV is exploited to forward confidential information between a ground source and legitimate ground destinations in a time division multiple access (TDMA) mode in the presence of a potential eavesdropper. Considering the fairness among users, the optimization problem of minimum secrecy rate maximization among users is formulated by jointly optimizing UAV’s trajectory, power control and user scheduling. To circumvent the non-convex optimization problem, an efficient alternating iterative algorithm is proposed to obtain a suboptimal solution by introducing slack variables and applying successive convex approximate (SCA). Simulation results illustrate that the proposed algorithm outperforms the benchmark schemes in terms of minimum secrecy rate.
{"title":"Secure Communication in UAV-Enabled Mobile Relay Systems","authors":"Zheng-qiang Wang, Yang Liu, Hao Zhang, Yongjun Xu, Xiaoyu Wan, Zi-fu Fan","doi":"10.1109/wpmc52694.2021.9700461","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700461","url":null,"abstract":"This paper considers an unmanned aerial vehicle (UAV) as a buffer-aided mobile relay systems. A UAV is exploited to forward confidential information between a ground source and legitimate ground destinations in a time division multiple access (TDMA) mode in the presence of a potential eavesdropper. Considering the fairness among users, the optimization problem of minimum secrecy rate maximization among users is formulated by jointly optimizing UAV’s trajectory, power control and user scheduling. To circumvent the non-convex optimization problem, an efficient alternating iterative algorithm is proposed to obtain a suboptimal solution by introducing slack variables and applying successive convex approximate (SCA). Simulation results illustrate that the proposed algorithm outperforms the benchmark schemes in terms of minimum secrecy rate.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"43 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116465293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700443
Siling Wang, Li Zhang
High-speed railway (HSR) has become one of the most preferable modes of transportation. With increased train speed, the rail wireless communication faces lots of challenges. One of them is the handover problem. The high handover failure rate and frequent handover due to the fast moving speed can cause serious communication interruption. In order to achieve seamless handover for HSR system, this paper utilizes distributed antenna systems (DASs) along with dual-layer architecture and proposes an improved handover scheme based on multi-criteria. The proposed handover scheme improves both the handover triggering probability and handover success rate, demonstrated by both the theoretical analysis and simulation results. The simulation results also show that the proposed scheme outperforms the traditional handover trigger scheme.
{"title":"A Multi-Criteria Handover Scheme for Distributed Antenna System Based High-Speed Rail Wireless Communications","authors":"Siling Wang, Li Zhang","doi":"10.1109/wpmc52694.2021.9700443","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700443","url":null,"abstract":"High-speed railway (HSR) has become one of the most preferable modes of transportation. With increased train speed, the rail wireless communication faces lots of challenges. One of them is the handover problem. The high handover failure rate and frequent handover due to the fast moving speed can cause serious communication interruption. In order to achieve seamless handover for HSR system, this paper utilizes distributed antenna systems (DASs) along with dual-layer architecture and proposes an improved handover scheme based on multi-criteria. The proposed handover scheme improves both the handover triggering probability and handover success rate, demonstrated by both the theoretical analysis and simulation results. The simulation results also show that the proposed scheme outperforms the traditional handover trigger scheme.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130855424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700456
S. K. Vankayala, Swaraj Kumar, Konchady Gautam Shenoy, D. Thirumulanathan, Seungil Yoon, Issaac Kommineni
Log likelihood ratio (LLR) computations are an integral part of the communication decoder design. Soft decoding, the most accurate method of computing LLR, is computationally very expensive. Industries are thus using approximations that are designed keeping in mind the hardware complexity involved in the optimization process. In this paper, we propose a neural network based computation scheme that is trained to mimic the performance of soft decoding with high accuracy. Besides training, we further reduce the computational complexity by disabling the weak edges in the neural network and by approximating the activation function. The degree to which the weak connections are disabled varies according to the quality of service (QoS) and QoS class identifier (QCI) tables. Our scheme thus offers a three-fold benefit to a firm in terms of commercialization: the design of a near-optimal low-complex LLR computation scheme that performs well in a 5G setting that demand high speed and accuracy, implementability using state-of-the-art technologies, and the flexibility of design on the basis of the QoS requirements of the customer application.
对数似然比(LLR)的计算是通信解码器设计中不可缺少的一部分。软解码是计算LLR最精确的方法，但在计算上非常昂贵。因此，行业使用的是考虑到优化过程中涉及的硬件复杂性而设计的近似。在本文中，我们提出了一种基于神经网络的计算方案，该方案经过训练可以模拟高精度的软解码性能。除了训练之外，我们还通过去功能化神经网络中的弱边和逼近激活函数来进一步降低计算复杂度。弱连接禁用的程度取决于QoS (quality of service)表和QCI (QoS class identifier)表。因此，我们的方案在商业化方面为公司提供了三方面的好处:设计一种近乎最佳的低复杂度LLR计算方案，该方案在要求高速度和准确性的5G环境中表现良好;使用最先进技术的可实施性;以及基于客户应用的QoS要求的设计灵活性。
{"title":"Neural Network Architecture for LLR Computation in 5G Systems and Related Business Aspects","authors":"S. K. Vankayala, Swaraj Kumar, Konchady Gautam Shenoy, D. Thirumulanathan, Seungil Yoon, Issaac Kommineni","doi":"10.1109/wpmc52694.2021.9700456","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700456","url":null,"abstract":"Log likelihood ratio (LLR) computations are an integral part of the communication decoder design. Soft decoding, the most accurate method of computing LLR, is computationally very expensive. Industries are thus using approximations that are designed keeping in mind the hardware complexity involved in the optimization process. In this paper, we propose a neural network based computation scheme that is trained to mimic the performance of soft decoding with high accuracy. Besides training, we further reduce the computational complexity by disabling the weak edges in the neural network and by approximating the activation function. The degree to which the weak connections are disabled varies according to the quality of service (QoS) and QoS class identifier (QCI) tables. Our scheme thus offers a three-fold benefit to a firm in terms of commercialization: the design of a near-optimal low-complex LLR computation scheme that performs well in a 5G setting that demand high speed and accuracy, implementability using state-of-the-art technologies, and the flexibility of design on the basis of the QoS requirements of the customer application.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125553365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700406
Atsushi Masubuchi, M. Umehira, Xiaoyan Wang, S. Takeda
Mobile terminal is required to improve the power utilization efficiency of HPA (High Power Amplifier) since the uplink transmission rate will increase and millimeter-wave band will be widely utilized in B5G (Beyond 5G). Small OBO (Output Back Off) operation of HPA improves power utilization efficiency however ACLP (Adjacent Channel Leakage Power) increases due to HPA nonlinearity, and it degrades spectrum efficiency. To solve these two problems, this paper proposes a simplified DPD (Digital Pre-distortion) linearizer for mobile terminal application in TDD (Time Division Duplexing) wireless systems. Key advantage of the proposed DPD linearizer is that it does not need an auxiliary receiver for DPD control, but it estimates DPD operation point by using multi-carrier pilot signal. This paper describes design methodology of operation point estimation pilot signals using Babcock frequency allocation and shows evaluation results of DPD operation point estimation accuracy as well as ACLP and ACI improvement performance by computer simulations.
由于B5G (Beyond 5G)中上行传输速率的提高和毫米波频段的广泛使用，移动终端需要提高HPA (High power Amplifier)的功率利用效率。HPA的小OBO (Output Back Off)操作提高了功率利用效率，但由于HPA的非线性，ACLP(邻道泄漏功率)增加，降低了频谱效率。为了解决这两个问题，本文提出了一种简化的DPD(数字预失真)线性器，用于TDD(时分双工)无线系统的移动终端应用。所提出的DPD线性器的主要优点是它不需要辅助接收器来进行DPD控制，而是利用多载波导频信号来估计DPD工作点。本文介绍了基于巴布科克频率分配的运行点估计导频信号的设计方法，并通过计算机仿真给出了DPD运行点估计精度以及ACLP和ACI改进性能的评估结果。
{"title":"A Simplified DPD Linearizer using Operation Point Estimation Pilot Signals for Mobile Terminal Application in TDD Wireless Systems","authors":"Atsushi Masubuchi, M. Umehira, Xiaoyan Wang, S. Takeda","doi":"10.1109/wpmc52694.2021.9700406","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700406","url":null,"abstract":"Mobile terminal is required to improve the power utilization efficiency of HPA (High Power Amplifier) since the uplink transmission rate will increase and millimeter-wave band will be widely utilized in B5G (Beyond 5G). Small OBO (Output Back Off) operation of HPA improves power utilization efficiency however ACLP (Adjacent Channel Leakage Power) increases due to HPA nonlinearity, and it degrades spectrum efficiency. To solve these two problems, this paper proposes a simplified DPD (Digital Pre-distortion) linearizer for mobile terminal application in TDD (Time Division Duplexing) wireless systems. Key advantage of the proposed DPD linearizer is that it does not need an auxiliary receiver for DPD control, but it estimates DPD operation point by using multi-carrier pilot signal. This paper describes design methodology of operation point estimation pilot signals using Babcock frequency allocation and shows evaluation results of DPD operation point estimation accuracy as well as ACLP and ACI improvement performance by computer simulations.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"250 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132730401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700425
{"title":"WPMC 2021 Cover Page","authors":"","doi":"10.1109/wpmc52694.2021.9700425","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700425","url":null,"abstract":"","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131601072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700409
Takuma Kogo, Y. Kozawa, H. Habuchi
Simultaneous light wave information and power transfer (SLIPT) plays an important role in constructing a flexible underwater network system to achieve both underwater visible light communication (UVLC) and underwater power transfer. In this paper, color shift keying (CSK) is considered as a modulation method of underwater SLIPT (USLIPT). Also, optimized CSK (OCSK) constellation points are presented for USLIPT using time splitting receiver. This paper considers the constellation design to maximize the minimum distance between the constellation points while mitigating total received current constraint for communication performance optimization. In this study, the attenuation coefficient in the underwater channel is derived from the chlorophyll concentration and the wavelength of each color, and the proposed constellation points are optimized for this underwater channel. In this paper, the average bit-error rate and harvested energy are analyzed and evaluated for the OCSK, and the performances are compared with USLIPT with an on-off keying (OOK) using time splitting receiver. The results show that the error rates of OCSK and OOK are less than 1$0^{-6}$ for the water quality of pure sea, and that of OCSK is less than that of OOK for the water quality of clear ocean when the distance between the transmitter and receiver, the full width transmitter beam divergence angle and the receiver aperture diameter are 50 m, 6 degrees and 0.05 m, respectively. Furthermore, in this pure sea condition, the harvest energy of OCSK was found to be slightly greater than that of OOK for the same DC bias current value at the transmitter.
{"title":"Chlorophyll concentration-based CSK constellation point design for underwater SLIPT with priority on communication performance","authors":"Takuma Kogo, Y. Kozawa, H. Habuchi","doi":"10.1109/wpmc52694.2021.9700409","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700409","url":null,"abstract":"Simultaneous light wave information and power transfer (SLIPT) plays an important role in constructing a flexible underwater network system to achieve both underwater visible light communication (UVLC) and underwater power transfer. In this paper, color shift keying (CSK) is considered as a modulation method of underwater SLIPT (USLIPT). Also, optimized CSK (OCSK) constellation points are presented for USLIPT using time splitting receiver. This paper considers the constellation design to maximize the minimum distance between the constellation points while mitigating total received current constraint for communication performance optimization. In this study, the attenuation coefficient in the underwater channel is derived from the chlorophyll concentration and the wavelength of each color, and the proposed constellation points are optimized for this underwater channel. In this paper, the average bit-error rate and harvested energy are analyzed and evaluated for the OCSK, and the performances are compared with USLIPT with an on-off keying (OOK) using time splitting receiver. The results show that the error rates of OCSK and OOK are less than 1$0^{-6}$ for the water quality of pure sea, and that of OCSK is less than that of OOK for the water quality of clear ocean when the distance between the transmitter and receiver, the full width transmitter beam divergence angle and the receiver aperture diameter are 50 m, 6 degrees and 0.05 m, respectively. Furthermore, in this pure sea condition, the harvest energy of OCSK was found to be slightly greater than that of OOK for the same DC bias current value at the transmitter.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115614512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700436
Kazuki Kuwata, Y. Shoji, M. Hasegawa, Yusuke Ito, Yoshito Watanabe, Aohan Li, So Hasegawa
As one of the technologies to enable Beyond 5G society, a Piggy-back Network has been proposed as a communication system based on Store-Carry-Forwarding with high-speed millimeter-wave links. In this paper, we evaluate the end-to-end throughput of optimized Piggy-back Networks. We formulate optimization of the data transfer route in the Piggy-back Network as a pickup and delivery problem and apply a heuristic optimization algorithm to the formulated problem. The results show that the optimized Piggy-back Network enables high throughput even for long-distance communication.
{"title":"Piggy-back Network to enable Beyond 5G Society supported by Autonomous Mobilities: : Evaluation of End-to-End Throughput on Optimized Piggy-back Networks","authors":"Kazuki Kuwata, Y. Shoji, M. Hasegawa, Yusuke Ito, Yoshito Watanabe, Aohan Li, So Hasegawa","doi":"10.1109/wpmc52694.2021.9700436","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700436","url":null,"abstract":"As one of the technologies to enable Beyond 5G society, a Piggy-back Network has been proposed as a communication system based on Store-Carry-Forwarding with high-speed millimeter-wave links. In this paper, we evaluate the end-to-end throughput of optimized Piggy-back Networks. We formulate optimization of the data transfer route in the Piggy-back Network as a pickup and delivery problem and apply a heuristic optimization algorithm to the formulated problem. The results show that the optimized Piggy-back Network enables high throughput even for long-distance communication.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128938287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700445
Chang Ge, Sijie Xia, Qiang Chen, F. Adachi
In our previous studies, we proposed a graph coloring algorithm (GCA) based on heuristics to solve the interference coordination problem for distributed multi-user multi-input multi-output (MU-MIMO). In this paper, along with the recent advances of machine learning, we propose a reinforcement learning (RL) based GCA for cluster-wise distributed MU-MIMO. The computer simulation confirms that our newly proposed RL-GCA can significantly improve the downlink link capacity compared with other non-intelligent GCAs. Also, an interesting conclusion has been obtained in terms of chromatic number (required minimum number of colors). It is shown that the less chromatic number does not necessarily lead to a better interference coordination. Under the propagation environment assumed in this paper, the best chromatic number which maximizes the achievable link capacity is shown to be 4.
{"title":"Reinforcement Learning-based Interference Coordination for Distributed MU-MIMO","authors":"Chang Ge, Sijie Xia, Qiang Chen, F. Adachi","doi":"10.1109/wpmc52694.2021.9700445","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700445","url":null,"abstract":"In our previous studies, we proposed a graph coloring algorithm (GCA) based on heuristics to solve the interference coordination problem for distributed multi-user multi-input multi-output (MU-MIMO). In this paper, along with the recent advances of machine learning, we propose a reinforcement learning (RL) based GCA for cluster-wise distributed MU-MIMO. The computer simulation confirms that our newly proposed RL-GCA can significantly improve the downlink link capacity compared with other non-intelligent GCAs. Also, an interesting conclusion has been obtained in terms of chromatic number (required minimum number of colors). It is shown that the less chromatic number does not necessarily lead to a better interference coordination. Under the propagation environment assumed in this paper, the best chromatic number which maximizes the achievable link capacity is shown to be 4.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124963961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-14DOI: 10.1109/wpmc52694.2021.9700431
Masafumi Moriyama, A. Kurosawa, Takashi Matsuda, T. Matsumura
As Internet of Things (IoT) develops, new radio access techniques that can effectively accommodate a massive number of devices transmitting small-size data are required to improve frequency utilization efficiency. We have researched and developed a system that can realize massive connections using non-orthogonal multiple access (NOMA). For NOMA systems, we have prepared successive interference cancellation (SIC) and parallel interference cancellation (PIC) to separate superimposed signals. However, PIC has a huge amount of calculation while SIC requires a certain amount of power difference to separate superimposed signals. Hence, in order to mitigate the disadvantage of PIC, we propose the method in which PIC is performed after SIC for NOMA systems. By combining SIC and PIC, the amount of calculation can be reduced with little deterioration from PIC performance. By computer simulation, we evaluate packet error rate (PER) and the amount of calculation. From the results of the simulation, we confirm that the proposed method is effective to reduce the amount of calculation by about 1/10.
{"title":"A Study of Parallel Interference Cancellation Combined with Successive Interference Cancellation for UL-NOMA Systems","authors":"Masafumi Moriyama, A. Kurosawa, Takashi Matsuda, T. Matsumura","doi":"10.1109/wpmc52694.2021.9700431","DOIUrl":"https://doi.org/10.1109/wpmc52694.2021.9700431","url":null,"abstract":"As Internet of Things (IoT) develops, new radio access techniques that can effectively accommodate a massive number of devices transmitting small-size data are required to improve frequency utilization efficiency. We have researched and developed a system that can realize massive connections using non-orthogonal multiple access (NOMA). For NOMA systems, we have prepared successive interference cancellation (SIC) and parallel interference cancellation (PIC) to separate superimposed signals. However, PIC has a huge amount of calculation while SIC requires a certain amount of power difference to separate superimposed signals. Hence, in order to mitigate the disadvantage of PIC, we propose the method in which PIC is performed after SIC for NOMA systems. By combining SIC and PIC, the amount of calculation can be reduced with little deterioration from PIC performance. By computer simulation, we evaluate packet error rate (PER) and the amount of calculation. From the results of the simulation, we confirm that the proposed method is effective to reduce the amount of calculation by about 1/10.","PeriodicalId":299827,"journal":{"name":"2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121488176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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