Pub Date : 2019-04-01DOI: 10.1109/WCNCW.2019.8902888
S. Yagli, Alex Dytso, H. Poor, S. Shamai
This paper introduces totally positive kernels and Pólya type distributions to information theory. In particular, it is shown that the variational diminishing property of Pólya type distributions, which is captured by the Oscillation Theorem, can be used to characterize the structure of capacity-achieving distributions for a large class of channels.
{"title":"Some Aspects of Totally Positive Kernels Useful in Information Theory","authors":"S. Yagli, Alex Dytso, H. Poor, S. Shamai","doi":"10.1109/WCNCW.2019.8902888","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902888","url":null,"abstract":"This paper introduces totally positive kernels and Pólya type distributions to information theory. In particular, it is shown that the variational diminishing property of Pólya type distributions, which is captured by the Oscillation Theorem, can be used to characterize the structure of capacity-achieving distributions for a large class of channels.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115169502","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902546
A. Jurcut, Jinyong Chen, A. Kalla, Madhusanka Liyanage, John Murphy
The authentication protocols existing in the realm of mobile satellite communication networks, usually employ the one-time shared secret technique. Although the technique combats well against replay attacks, however, it is vulnerable to desynchronisation attacks. The later type of attacks, if framed and mounted against the crucial update mechanisms, which occur in mobile satellite communication systems, can lead to permanent Denial of Service (DoS) conditions. In this context, the authentication protocol initially proposed by Lee et al. [1] has emerged as the defacto protocol and forms the basis for various other authentication protocols developed since then.In this paper our contribution is two-fold. The first part of the paper presents an analysis of the authentication protocol [1], which reveals that the protocol is fundamentally susceptible to two attacks: impersonation attack and desynchronisation attack. To overcome these susceptibilities, in the second part of the paper, a new authentication protocol is proposed which incorporates a resynchronization phase. The paper demonstrates that the proposed solution is robust to impersonation attacks as well as to permanent DoS conditions caused by desynchronisation attacks. Moreover, the proposed solution is expected to find its application to address the desynchronisation issue found in numerous other recently published enhanced authentication protocols.
{"title":"A Novel Authentication Mechanism for Mobile Satellite Communication Systems","authors":"A. Jurcut, Jinyong Chen, A. Kalla, Madhusanka Liyanage, John Murphy","doi":"10.1109/WCNCW.2019.8902546","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902546","url":null,"abstract":"The authentication protocols existing in the realm of mobile satellite communication networks, usually employ the one-time shared secret technique. Although the technique combats well against replay attacks, however, it is vulnerable to desynchronisation attacks. The later type of attacks, if framed and mounted against the crucial update mechanisms, which occur in mobile satellite communication systems, can lead to permanent Denial of Service (DoS) conditions. In this context, the authentication protocol initially proposed by Lee et al. [1] has emerged as the defacto protocol and forms the basis for various other authentication protocols developed since then.In this paper our contribution is two-fold. The first part of the paper presents an analysis of the authentication protocol [1], which reveals that the protocol is fundamentally susceptible to two attacks: impersonation attack and desynchronisation attack. To overcome these susceptibilities, in the second part of the paper, a new authentication protocol is proposed which incorporates a resynchronization phase. The paper demonstrates that the proposed solution is robust to impersonation attacks as well as to permanent DoS conditions caused by desynchronisation attacks. Moreover, the proposed solution is expected to find its application to address the desynchronisation issue found in numerous other recently published enhanced authentication protocols.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129735315","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902858
T. Ojanperä, M. Kutila, P. Pyykönen, J. Scholliers, T. Sukuvaara, Kari Mäenpää, Oiva Huuskonen
The development of 5G is taking steps forward to solve the communication challenges of the future. One of the main application areas to benefit from 5G is intelligent traffic and vehicular communication. This paper discusses the recent advances in the development and piloting of novel road weather and safety services. The services considered in the paper exploit extensive vehicular observation data, of which transmission is enabled by a 5G communications architecture. The purpose of the services is to provide enhancements to road users, road maintenance operations as well as to 3rd parties. Furthermore, low latency 5G networks will enable future automated driving functionality, considered in the paper as well. The paper presents use cases and a generic system architecture for the envisioned service concepts. In addition, selected results obtained from testing the services in real vehicular and 5G test network environments are presented.
{"title":"Development and Piloting of Novel 5G-Enabled Road Safety Services","authors":"T. Ojanperä, M. Kutila, P. Pyykönen, J. Scholliers, T. Sukuvaara, Kari Mäenpää, Oiva Huuskonen","doi":"10.1109/WCNCW.2019.8902858","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902858","url":null,"abstract":"The development of 5G is taking steps forward to solve the communication challenges of the future. One of the main application areas to benefit from 5G is intelligent traffic and vehicular communication. This paper discusses the recent advances in the development and piloting of novel road weather and safety services. The services considered in the paper exploit extensive vehicular observation data, of which transmission is enabled by a 5G communications architecture. The purpose of the services is to provide enhancements to road users, road maintenance operations as well as to 3rd parties. Furthermore, low latency 5G networks will enable future automated driving functionality, considered in the paper as well. The paper presents use cases and a generic system architecture for the envisioned service concepts. In addition, selected results obtained from testing the services in real vehicular and 5G test network environments are presented.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117230806","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902849
Ye Wang, Wei-chen Zou
As millimeter wave (mmWave) communication has a great deal of free spectrum resources, it has been considered as a key technique for 5G networks. For mmWave communication systems, it is difficult to use conventional digital precoding due to the limitation of cost and power consumption. Therefore, the combination of digital precoding and analog precoding, which is known as hybrid precoding, is put forward to solve the problem. In this paper, we introduce a heuristic searching method to optimize the columns of the analog precoder. Therefore, the non-convex hybrid precoding problem can be solved successively. Thus, a novel hybrid precoding algorithm is proposed for mmWave communication systems. We show that the proposed algorithm is able to achieve good performance. Moreover, it is effective in different scenarios, such as the communication system with finite-resolution phase shifters or imperfect channel state information.
{"title":"Hybrid Digital and Analog Precoding Algorithm for Millimeter Wave MIMO Systems","authors":"Ye Wang, Wei-chen Zou","doi":"10.1109/WCNCW.2019.8902849","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902849","url":null,"abstract":"As millimeter wave (mmWave) communication has a great deal of free spectrum resources, it has been considered as a key technique for 5G networks. For mmWave communication systems, it is difficult to use conventional digital precoding due to the limitation of cost and power consumption. Therefore, the combination of digital precoding and analog precoding, which is known as hybrid precoding, is put forward to solve the problem. In this paper, we introduce a heuristic searching method to optimize the columns of the analog precoder. Therefore, the non-convex hybrid precoding problem can be solved successively. Thus, a novel hybrid precoding algorithm is proposed for mmWave communication systems. We show that the proposed algorithm is able to achieve good performance. Moreover, it is effective in different scenarios, such as the communication system with finite-resolution phase shifters or imperfect channel state information.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124401708","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902497
Shangbin Wu, Xiaoqing Zhang
This paper proposed a low-complexity antenna-la-aware (ALA) covariance matrix estimation method. In the estimation process, antenna layout is assumed known at the estimator. Using this information, the estimator finds antenna pairs with statistically equivalent covariance values and sets their covariance values to the average of covariance values of all these antenna pairs. ALA for both uniform linear array (ULA) and uniform planar array (UPA) is discussed. This method takes the benefit that covariance matrices do not have full degrees of freedom. Then, the proposed ALA covariance matrix method is applied to a multi-cell network. Simulations have demonstrated that the proposed method can provide better performance than the widely used viaQ method, with respect to mean square errors and downlink spectral efficiencies.
{"title":"A Low-Complexity Antenna-La-Aware Spatial Covariance Matrix Estimation Method","authors":"Shangbin Wu, Xiaoqing Zhang","doi":"10.1109/WCNCW.2019.8902497","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902497","url":null,"abstract":"This paper proposed a low-complexity antenna-la-aware (ALA) covariance matrix estimation method. In the estimation process, antenna layout is assumed known at the estimator. Using this information, the estimator finds antenna pairs with statistically equivalent covariance values and sets their covariance values to the average of covariance values of all these antenna pairs. ALA for both uniform linear array (ULA) and uniform planar array (UPA) is discussed. This method takes the benefit that covariance matrices do not have full degrees of freedom. Then, the proposed ALA covariance matrix method is applied to a multi-cell network. Simulations have demonstrated that the proposed method can provide better performance than the widely used viaQ method, with respect to mean square errors and downlink spectral efficiencies.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126648547","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902737
M. Bekkar, C. Siclet, L. Ros, B. Miscopein, S. Bories
Densification of mobile networks using small cells (SCs) is a promising approach to achieve the forecasted 1000x growth in capacity for next generation wireless communication systems. However, a major impediment of dense SC network is the low signal-to-interference-plus-noise ratio (SINR) regime, notably in uncoordinated time-division duplexing (TDD) systems in sub-6GHz bands. To circumvent this issue and to enhance the performance of the physical (PHY) layer, hybrid beamforming (HBF) solutions involving both analog and digital stages are necessary. HBF technologies provide interference rejection through analog filtering prior to quantization, spatial multiplexing and require lesser radio-frequency (RF) chains and analog-to-digital converters (ADCs). Conversely, digital beamforming (DBF) performance saturates because of high interferers (blockers) and restricted ADC dynamic range. Moreover, HBF RF circuitry could be further simplified by the use of phase-only weights in analog beamforming (ABF) stage. However, this would be at the cost of making the SINR optimization problem non-convex. Existing sumrate results amalgamating quantization noise consist of lower bounds obtained by distortion factor approximation and worst-case distribution assumption. In this paper, we propose a relaxation approach to phase-only beamforming which allows for a straightforward solution using off-the-shelf interior point algorithms. Rather than directly comparing it in terms of sumrate, we compare it first in terms of SINR, as a function of an algebraic angle between the interferer and the user, with a state-of-the-art local convergence method. Further to this, we include an ADC model to the existing lower bound sumrate results, and analyze various solutions in a sub-6GHz multi-user uplink scenario.
{"title":"On the use of semidefinite relaxation for uplink phase-only hybrid beamforming with blockers","authors":"M. Bekkar, C. Siclet, L. Ros, B. Miscopein, S. Bories","doi":"10.1109/WCNCW.2019.8902737","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902737","url":null,"abstract":"Densification of mobile networks using small cells (SCs) is a promising approach to achieve the forecasted 1000x growth in capacity for next generation wireless communication systems. However, a major impediment of dense SC network is the low signal-to-interference-plus-noise ratio (SINR) regime, notably in uncoordinated time-division duplexing (TDD) systems in sub-6GHz bands. To circumvent this issue and to enhance the performance of the physical (PHY) layer, hybrid beamforming (HBF) solutions involving both analog and digital stages are necessary. HBF technologies provide interference rejection through analog filtering prior to quantization, spatial multiplexing and require lesser radio-frequency (RF) chains and analog-to-digital converters (ADCs). Conversely, digital beamforming (DBF) performance saturates because of high interferers (blockers) and restricted ADC dynamic range. Moreover, HBF RF circuitry could be further simplified by the use of phase-only weights in analog beamforming (ABF) stage. However, this would be at the cost of making the SINR optimization problem non-convex. Existing sumrate results amalgamating quantization noise consist of lower bounds obtained by distortion factor approximation and worst-case distribution assumption. In this paper, we propose a relaxation approach to phase-only beamforming which allows for a straightforward solution using off-the-shelf interior point algorithms. Rather than directly comparing it in terms of sumrate, we compare it first in terms of SINR, as a function of an algebraic angle between the interferer and the user, with a state-of-the-art local convergence method. Further to this, we include an ADC model to the existing lower bound sumrate results, and analyze various solutions in a sub-6GHz multi-user uplink scenario.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127001618","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902884
Jules Courjault, B. Vrigneau, O. Berder
In the last years, LoRa has emerged as a high potential candidate among several standards for the Internet of Things (IoT) subject to an exponential development. LoRa modulation is based on a classical chirp spread-spectrum technique and permits wireless data transmission up to 50 kbps over several kilometers with a high energy efficiency. Although a well-known principle, its performance in terms of symbol or bit error probability has been theoretically analyzed in few recent papers only. Recently, closed-form approximations of Bit Error Probability (BEP) for additive white Gaussian noise channels and Rayleigh fading channels were proposed. In this paper, we introduce a new approach using Marcum function for approximating the LoRa BEP. The latter is available for both Additive White Gaussian Noise channels and Rayleigh fading channels and the approach should deal with a variety of fadings. Simulations and comparisons with the state of the art show that the proposed approximation is almost ten times more accurate and may be considered as a numerical reference.
{"title":"Fast performance evaluation of LoRa communications over Rayleigh fading channels","authors":"Jules Courjault, B. Vrigneau, O. Berder","doi":"10.1109/WCNCW.2019.8902884","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902884","url":null,"abstract":"In the last years, LoRa has emerged as a high potential candidate among several standards for the Internet of Things (IoT) subject to an exponential development. LoRa modulation is based on a classical chirp spread-spectrum technique and permits wireless data transmission up to 50 kbps over several kilometers with a high energy efficiency. Although a well-known principle, its performance in terms of symbol or bit error probability has been theoretically analyzed in few recent papers only. Recently, closed-form approximations of Bit Error Probability (BEP) for additive white Gaussian noise channels and Rayleigh fading channels were proposed. In this paper, we introduce a new approach using Marcum function for approximating the LoRa BEP. The latter is available for both Additive White Gaussian Noise channels and Rayleigh fading channels and the approach should deal with a variety of fadings. Simulations and comparisons with the state of the art show that the proposed approximation is almost ten times more accurate and may be considered as a numerical reference.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133831903","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 : 2019-04-01DOI: 10.1109/WCNCW.2019.8902661
Jiakang Xu, M. A. Weitnauer
Several practical residual interference models are compared via network simulation of wireless sensor networks with interference cancellation and no spreading. The packet delivery ratio is investigated for the network with various parameters. The simulation results indicate that using a certain popular residual interference model can lead to unreliable and inaccurate results and proposed a simplified stochastic model as a close match to the full stochastic model.
{"title":"Practical models for interference cancellation residual error in transmission-only networks","authors":"Jiakang Xu, M. A. Weitnauer","doi":"10.1109/WCNCW.2019.8902661","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902661","url":null,"abstract":"Several practical residual interference models are compared via network simulation of wireless sensor networks with interference cancellation and no spreading. The packet delivery ratio is investigated for the network with various parameters. The simulation results indicate that using a certain popular residual interference model can lead to unreliable and inaccurate results and proposed a simplified stochastic model as a close match to the full stochastic model.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132259449","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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