Pub Date : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000502
Iandra Galdino, R. Zakaria, D. L. Ruyet, M. Campos
Quadrature amplitude modulation based Filter-bank multicarrier (QAM-FBMC) is a promising technology for 5G and beyond. Compared to OFDM, QAM-FBMC can provide better spectral confinement and lower out-of-band emissions (OOBE). These advantages come with the cost of high intrinsic interference and bit error rate (BER) degradation. In this paper, we propose different receivers to improve the performance of the QAM-FBMC systems. The simulation results show that the proposed receivers, based on minimum mean square error (MMSE) and iterative interference cancellation (IIC), are able to significantly enhance the system performance.
{"title":"Advanced receivers for QAM-FBMC systems with short filters","authors":"Iandra Galdino, R. Zakaria, D. L. Ruyet, M. Campos","doi":"10.1109/LATINCOM56090.2022.10000502","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000502","url":null,"abstract":"Quadrature amplitude modulation based Filter-bank multicarrier (QAM-FBMC) is a promising technology for 5G and beyond. Compared to OFDM, QAM-FBMC can provide better spectral confinement and lower out-of-band emissions (OOBE). These advantages come with the cost of high intrinsic interference and bit error rate (BER) degradation. In this paper, we propose different receivers to improve the performance of the QAM-FBMC systems. The simulation results show that the proposed receivers, based on minimum mean square error (MMSE) and iterative interference cancellation (IIC), are able to significantly enhance the system performance.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132972252","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000795
Jonathan N. Gois, Julio N. Thomaz, F. Sampaio, T. Ferreira, A. P. López-Barbero, V. N. H. Silva, L. Neto
Advantages achieved by mobile communication have led to the evolution of access networks, especially using optical fibers. Nevertheless, optical access can be quite expensive even for short range links. The step-index plastic optical fiber (SIPOF) provides several advantages to traditional optical fibers. Nonetheless, due to the high modal dispersion, long connections become unfeasible. This article brings about some models of bias, OFDM signal power, and fiber length, for an access network using SI-POF, as a tool for the link design with a high signal-to-noise ratio. In this work, several models for this type of network are also compared, in addition to the relations underlying the model’s complexity and the evaluation of the results.
{"title":"Modeling the Bias Current and OFDM Signal Power under Amplitude Constraints for SI-POF","authors":"Jonathan N. Gois, Julio N. Thomaz, F. Sampaio, T. Ferreira, A. P. López-Barbero, V. N. H. Silva, L. Neto","doi":"10.1109/LATINCOM56090.2022.10000795","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000795","url":null,"abstract":"Advantages achieved by mobile communication have led to the evolution of access networks, especially using optical fibers. Nevertheless, optical access can be quite expensive even for short range links. The step-index plastic optical fiber (SIPOF) provides several advantages to traditional optical fibers. Nonetheless, due to the high modal dispersion, long connections become unfeasible. This article brings about some models of bias, OFDM signal power, and fiber length, for an access network using SI-POF, as a tool for the link design with a high signal-to-noise ratio. In this work, several models for this type of network are also compared, in addition to the relations underlying the model’s complexity and the evaluation of the results.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124811753","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000439
Christian Forsch, P. Zillmann, O. Alrabadi, S. Brueck, Wolfgang H. Gerstacker
In this work, we consider a real additive white Gaussian noise (AWGN) channel with 1-bit quantization and oversampling at the receiver side for transmission with higher-order amplitude-shift keying (ASK) constellations. We analytically compute the statistics of the detection variable for arbitrary real inputs and present an optimal as well as a suboptimal detection scheme. Furthermore, we evaluate the symbol error rate (SER) for a 4-ary ASK constellation and different detection schemes as well as oversampling factors. The SER curves show that a reliable communication can be established for higher-order ASK constellations when the oversampling factor is sufficiently high. Then, we optimize the 4-ASK constellation with respect to the SER. The results show that the minimum SER can be decreased significantly by increasing the distance between the inner and outer points of the input constellation. Finally, the results are extended to complex-valued constellations.
{"title":"Performance Analysis of 1-Bit Quantization with Oversampling for Higher-Order Constellations","authors":"Christian Forsch, P. Zillmann, O. Alrabadi, S. Brueck, Wolfgang H. Gerstacker","doi":"10.1109/LATINCOM56090.2022.10000439","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000439","url":null,"abstract":"In this work, we consider a real additive white Gaussian noise (AWGN) channel with 1-bit quantization and oversampling at the receiver side for transmission with higher-order amplitude-shift keying (ASK) constellations. We analytically compute the statistics of the detection variable for arbitrary real inputs and present an optimal as well as a suboptimal detection scheme. Furthermore, we evaluate the symbol error rate (SER) for a 4-ary ASK constellation and different detection schemes as well as oversampling factors. The SER curves show that a reliable communication can be established for higher-order ASK constellations when the oversampling factor is sufficiently high. Then, we optimize the 4-ASK constellation with respect to the SER. The results show that the minimum SER can be decreased significantly by increasing the distance between the inner and outer points of the input constellation. Finally, the results are extended to complex-valued constellations.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129302850","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000524
Julian Solis, Pablo Palacios Játiva, César A. Azurdia-Meza, David Zabala-Blanco, I. Soto, M. Ijaz
Underground Mining (UM) is a harsh environment that involves multiple threats to worker safety and needs adequate wireless communications to ensure worker well-being and optimize miner efficiency. While radio frequency signals can be used to manage such tasks, several limitations exist to its potential, as multiple phenomena affect their quality. Therefore, Visible Light Communications (VLC) has been proposed as a robust alternative to RF usage due to its many advantages over typical wireless technologies. Nevertheless, the conditions of the underground mines diverge importantly from the assumptions and simplifications of indoor models. To mitigate the problems generated by the UM environment in the VLC system, there must be adequate channel modeling that includes all the physical and external features that affect the communication system. To address this topic, in this paper, we present a generic Multiple-Input-Multiple-Output (MIMO) VLC channel analytic model for a UM environment. This channel model is evaluated with different positions of the optical receiver in a UM scenario in terms of typical metrics such as Channel Impulse Response (CIR) and Root Mean Square (RMS) delay spread. These results are the baseline that will allow us to propose solutions to improve the efficiency of the UM-VLC system in the future.
{"title":"A General MIMO VLC Channel Model for Underground Mining Environments","authors":"Julian Solis, Pablo Palacios Játiva, César A. Azurdia-Meza, David Zabala-Blanco, I. Soto, M. Ijaz","doi":"10.1109/LATINCOM56090.2022.10000524","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000524","url":null,"abstract":"Underground Mining (UM) is a harsh environment that involves multiple threats to worker safety and needs adequate wireless communications to ensure worker well-being and optimize miner efficiency. While radio frequency signals can be used to manage such tasks, several limitations exist to its potential, as multiple phenomena affect their quality. Therefore, Visible Light Communications (VLC) has been proposed as a robust alternative to RF usage due to its many advantages over typical wireless technologies. Nevertheless, the conditions of the underground mines diverge importantly from the assumptions and simplifications of indoor models. To mitigate the problems generated by the UM environment in the VLC system, there must be adequate channel modeling that includes all the physical and external features that affect the communication system. To address this topic, in this paper, we present a generic Multiple-Input-Multiple-Output (MIMO) VLC channel analytic model for a UM environment. This channel model is evaluated with different positions of the optical receiver in a UM scenario in terms of typical metrics such as Channel Impulse Response (CIR) and Root Mean Square (RMS) delay spread. These results are the baseline that will allow us to propose solutions to improve the efficiency of the UM-VLC system in the future.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124312856","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000505
Peng Hu
Recently advanced low-Earth-orbit (LEO) satellite networks represented by large constellations and advanced pay-loads provide great promises for enabling high-quality Internet connectivity to any place on Earth. However, the traditional access-based approach to satellite operations cannot meet the pressing requirements of real-time, reliable, and resilient operations for LEO satellites. A new scheme is proposed based on multi-layer satellite networking considering the advanced Ka-band and optical communications payloads on a satellite platform. The proposed scheme can enable efficient and resilient message transmissions for critical telecommand and telemetry missions through different layers of satellite networks, which consist of LEO, medium-Earth-orbit (MEO), and geostationary (GEO) satellites. The proposed scheme is evaluated in a 24-hr satellite mission and shows superior performance improvements compared to the traditional operations approach.
{"title":"Enabling Resilient and Real-Time Network Operations in Space: A Novel Multi-Layer Satellite Networking Scheme","authors":"Peng Hu","doi":"10.1109/LATINCOM56090.2022.10000505","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000505","url":null,"abstract":"Recently advanced low-Earth-orbit (LEO) satellite networks represented by large constellations and advanced pay-loads provide great promises for enabling high-quality Internet connectivity to any place on Earth. However, the traditional access-based approach to satellite operations cannot meet the pressing requirements of real-time, reliable, and resilient operations for LEO satellites. A new scheme is proposed based on multi-layer satellite networking considering the advanced Ka-band and optical communications payloads on a satellite platform. The proposed scheme can enable efficient and resilient message transmissions for critical telecommand and telemetry missions through different layers of satellite networks, which consist of LEO, medium-Earth-orbit (MEO), and geostationary (GEO) satellites. The proposed scheme is evaluated in a 24-hr satellite mission and shows superior performance improvements compared to the traditional operations approach.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127215243","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000487
Sandra Zimmermann, Paul Schwenteck, Christian L. Vielhaus, Juan A. Cabrera, F. Fitzek
Wireless and mobile ad hoc networks will consolidate future network architectures. Due to limited resources and the high churn of nodes, these networks are prone to network partitioning. So far, other work has considered this problem exclusively on the connectivity level by restoring connections by repositioning nodes. However, the application level perspective is missing, although distributed services, like network services, can be built to be robust against random failures. In this work, we examine how distributed storage can adapt its redundancy at the application layer to counteract the repercussions of network partitioning. Adjusting redundancy to present situations is necessary to deal with the dynamic topology in Mobile Ad Hoc Networks (MANET). Consequently, in this work, we propose a formal model for network partitioning from the application point of view. We propose two schemes to add and remove redundancy, to create a self-healing network and compare them to the state-of-the-art concepts. Furthermore, we show the cost of service availability facing partitioning and the disconnection of individual participants. With our proposed schemes, we were able to reduce the storage cost by 80% to ensure the same level of availability as by using state-of-the-art techniques.
{"title":"Immortal Under the Edge of a Knife: Self-Healing Distributed Services on MANET Partitioning","authors":"Sandra Zimmermann, Paul Schwenteck, Christian L. Vielhaus, Juan A. Cabrera, F. Fitzek","doi":"10.1109/LATINCOM56090.2022.10000487","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000487","url":null,"abstract":"Wireless and mobile ad hoc networks will consolidate future network architectures. Due to limited resources and the high churn of nodes, these networks are prone to network partitioning. So far, other work has considered this problem exclusively on the connectivity level by restoring connections by repositioning nodes. However, the application level perspective is missing, although distributed services, like network services, can be built to be robust against random failures. In this work, we examine how distributed storage can adapt its redundancy at the application layer to counteract the repercussions of network partitioning. Adjusting redundancy to present situations is necessary to deal with the dynamic topology in Mobile Ad Hoc Networks (MANET). Consequently, in this work, we propose a formal model for network partitioning from the application point of view. We propose two schemes to add and remove redundancy, to create a self-healing network and compare them to the state-of-the-art concepts. Furthermore, we show the cost of service availability facing partitioning and the disconnection of individual participants. With our proposed schemes, we were able to reduce the storage cost by 80% to ensure the same level of availability as by using state-of-the-art techniques.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114673155","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000526
Flávio Brito, Lucas Silva, Leonardo Ramalho, Silvia Lins, Neiva Linder, A. Klautau
The use of artificial neural networks for the purpose of image classification, together with the advancement in computational capabilities of edge devices, plays an important role in the new emerging 5G use case scenarios. However, one of the main challenges of applications involving the use of these networks in edge devices is still the limitation of computational resources. An alternative for saving resources and promoting privacy are the split learning (or split inference) techniques, in which a deep neural network is cut into two parts and executed in distinct devices. Most of these techniques rely on sending the activation signals (output of the cut layer) through the communication channel. This work proposes a new compression algorithm for decreasing the bit rate required for the transmission of the activation signals (or simply “scores”). The presented results demonstrate that the transmission rate can be decreased without hurting the neural network accuracy.
{"title":"Compression of Activation Signals from Split Deep Neural Network","authors":"Flávio Brito, Lucas Silva, Leonardo Ramalho, Silvia Lins, Neiva Linder, A. Klautau","doi":"10.1109/LATINCOM56090.2022.10000526","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000526","url":null,"abstract":"The use of artificial neural networks for the purpose of image classification, together with the advancement in computational capabilities of edge devices, plays an important role in the new emerging 5G use case scenarios. However, one of the main challenges of applications involving the use of these networks in edge devices is still the limitation of computational resources. An alternative for saving resources and promoting privacy are the split learning (or split inference) techniques, in which a deep neural network is cut into two parts and executed in distinct devices. Most of these techniques rely on sending the activation signals (output of the cut layer) through the communication channel. This work proposes a new compression algorithm for decreasing the bit rate required for the transmission of the activation signals (or simply “scores”). The presented results demonstrate that the transmission rate can be decreased without hurting the neural network accuracy.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129206863","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 : 2022-11-30DOI: 10.1109/LATINCOM56090.2022.10000473
Racyus D. G. Pacífico, M. Vieira, L. F. S. Duarte, J. Nacif
Data security has become a crucial factor in the context of computer networks. From 2015 until 2021, the damage caused by the theft of information on the Internet was around 6 trillion dollars. In this scenario, Intrusion Detection Systems (IDSs) are essential elements in the search for threats. However, usually, IDSs run on conventional computers with little processing power and high operating costs. Offloading of network functions in SmartNICs and the Serverless paradigm emerge as efficient solutions because they combine flexibility and programmability. This paper proposes an IDS Serverless with offloading of user-defined filters in SmartNIC Netronome. We created different filters using the eBPF technology to validate the system. Our results show that it is possible to detect vulnerabilities at line rate.
{"title":"Function as a Service Offloaded to a SmartNIC","authors":"Racyus D. G. Pacífico, M. Vieira, L. F. S. Duarte, J. Nacif","doi":"10.1109/LATINCOM56090.2022.10000473","DOIUrl":"https://doi.org/10.1109/LATINCOM56090.2022.10000473","url":null,"abstract":"Data security has become a crucial factor in the context of computer networks. From 2015 until 2021, the damage caused by the theft of information on the Internet was around 6 trillion dollars. In this scenario, Intrusion Detection Systems (IDSs) are essential elements in the search for threats. However, usually, IDSs run on conventional computers with little processing power and high operating costs. Offloading of network functions in SmartNICs and the Serverless paradigm emerge as efficient solutions because they combine flexibility and programmability. This paper proposes an IDS Serverless with offloading of user-defined filters in SmartNIC Netronome. We created different filters using the eBPF technology to validate the system. Our results show that it is possible to detect vulnerabilities at line rate.","PeriodicalId":221354,"journal":{"name":"2022 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130807601","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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