2018 IEEE Globecom Workshops (GC Wkshps)最新文献

{"title":"Power Allocation for Maximum MIMO-NOMA System User-Rate","authors":"Shahira H. Amin, A. Mehana, Samy S. Soliman, Y. Fahmy","doi":"10.1109/GLOCOMW.2018.8644505","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644505","url":null,"abstract":"This paper studies the sum-rate of downlink multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) systems. The maximum number of users is sought, under a total transmission power constraint and a minimum rate constraint per user. We propose a simplified interference alignment (IA) scheme which does not require global channel state information (CSI); instead, each user has its own CSI, whereas the base station has the statistical information (SI) of all the users. Using the proposed scheme, the users are divided into clusters, where the inter-cluster interference is canceled using IA; whereas the conventional intra-cluster NOMA interference is mitigated using successive interference cancellation (SIC). A closed-form expression is obtained for the achievable ergodic sum rate. Additionally, a power allocation scheme is proposed to maximize the sum rate subject to the aforementioned constraints. Finally, an efficient algorithm is developed to obtain the maximum number of users that can be admitted in the network. The performance is compared to orthogonal multiple access (OMA) schemes. Results show that the proposed scheme efficiently computes the number of users and provides significant gain compared to OMA schemes.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117023987","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}

{"title":"DLopC: Data Locality Independency-Aware VM Clustering in Cloud Computing","authors":"Vipul Mudgill, G. Aujla, Neeraj Kumar, M. Obaidat, R. Prodan","doi":"10.1109/GLOCOMW.2018.8644081","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644081","url":null,"abstract":"Cloud Computing (CC) is one of the most popular technologies of the modern era, which provides seamless connectivity and services to the end users as per their demands. In CC, using virtualization, efficient resource utilization can be achieved which in turn increases the performance of any implemented solution in this environment. However, in order to provide the services to the end users, there is an exponential increase in the size and number of servers within the cloud data centers (DCs) which raises the need of efficient VM management in modern DCs. However, most of the clustering techniques reported in the literature are centroid based in which the number of VM clusters are predefined, which makes them highly dependent on the location of the data. Moreover, these existing proposals emphasize on arranging the data in a spherical structure with equal number of VM clusters. To mitigate all these issues, in this paper, we propose Tukey?s-HSD Based Clustering (TBC), which provides high accuracy for clustering a set of VMs. In the proposed scheme by using the two key parameters-CPU and RAM utilization, VMs are clustered. VMs having different resource utilization are compared using the Normal Curve and Analysis of Variance (ANOVA) test along with the TBC test for evaluating the membership of all VMs. With respect to these metrics, the performance of the proposed scheme is found to be superior in comparison to the other state-of-the-art competing schemes of its category.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128306947","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}

{"title":"Energy Efficient Secure MISO Non-Orthogonal Multiple Access Transmission","authors":"Shahab Jahanbazi, M. Mirmohseni","doi":"10.1109/GLOCOMW.2018.8644348","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644348","url":null,"abstract":"In this paper, we consider a multiple-input single-output (MISO) non-orthogonal multiple access (NOMA) system in the presence of an external single-antenna eavesdropper. We study secure downlink transmission strategies. The challenge is that the multiple antenna configurations make the successive interference cancellation (SIC) condition, which is necessary for applying NOMA schemes, much complex. We formulate the transmission power minimization problem under the quality of service (QoS), SIC and secrecy constraints. In particular, the transmission power minimization problems are formulated under both perfect channel state information (CSI) and the bounded CSI error models. These problems are non-convex, hence they are challenging to solve. Using semidefinite relaxation (SDR) and successive convex approximation (SCA), we propose an iterative algorithm for solving these problems. Our numerical results show that the proposed scheme succeeds in establishing secure communications and NOMA is capable of outperforming the conventional orthogonal multiple access schemes in terms of its power efficiency.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130311890","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}

{"title":"Robust and Secure Content Delivery in Energy and Spectrum Efficient Next-Generation Networks","authors":"M. Abedi, N. Mokari, M. Javan, Eduard Axel Jorswieck","doi":"10.1109/GLOCOMW.2018.8644323","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644323","url":null,"abstract":"The four promising technologies, namely multiuser sparse code multiple access, content caching, energy harvesting, and physical layer security, are addressed in this paper for efficient resource allocation in the access and backhaul links of a wireless network. In order to jointly consider these technologies in a unified framework, we optimize the energy efficiency of the access links under system constraints. Due to non-convexity of the optimization problems, we propose an iterative algorithm based on the alternative and successive convex approximation method. The simulation results show that the proposed caching scheme outperforms the existing traditional caching schemes like random caching and most popular caching. Moreover, the proposed joint access and backhaul optimization has better performance than the disjoint one.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130635354","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}

{"title":"A Tool for Internet of Things Digital Business Model Innovation","authors":"Annabeth Aagaard, M. Presser, Michail J. Beliatis, Hussam Mansour, S. Nagy","doi":"10.1109/GLOCOMW.2018.8644517","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644517","url":null,"abstract":"The use of digital technologies such as Internet of Things is central in building new business models. With an increasing amount of real-time and historical data being available across ecosystems, new patterns and algorithms can be identified to create business models of tomorrow. However, existing business model frameworks do not incorporate digital technologies nor take into account how these technologies can be used to generate new business value. Thus, the research aim of this paper is therefore to use existing business model frameworks to build a new business model tool, suitable for designing and mapping Internet of Things business model innovations. Through a literature review and a case example the Business Model Tool for Internet of Things Business Model Innovations is presented and explored in theory and practice.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123905420","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}

{"title":"Optimizing Multicell Scheduling and Beamforming via Fractional Programming and Hungarian Algorithm","authors":"A. A. Khan, R. Adve, Wei Yu","doi":"10.1109/GLOCOMW.2018.8644119","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644119","url":null,"abstract":"The problem of optimizing scheduling and beamforming to maximize the network weighted sum rate (WSR) for the downlink of multicell, multi-antenna networks is challenging due to its nonconvexity and NP-hardness. In this paper, we present a novel approach based on the Hungarian algorithm and fractional programming that allows us to converge to an effective solution of the WSR maximization problem. Through extensive simulations, we compare the performance of the proposed algorithm with state-of-the art coordinated and uncoordinated resource allocation schemes in the literature. The proposed algorithm is shown to provide higher sum-log-utility values than previously proposed schemes matched filtering (MF), zero-forcing (ZF) and weighted minimum-mean-squared error (WMMSE), while offering a substantial improvement in cell-edge user rates over WMMSE with proportionally fair scheduling. Furthermore, the proposed scheme has a considerably lower computational complexity than multi-cell WMMSE.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124235607","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}

{"title":"Dual Polarized Spatial Modulation for Land Mobile Satellite Communications","authors":"Jing Zhu, Ping Yang, Yue Xiao, M. Renzo, Shaoqian Li","doi":"10.1109/GLOCOMW.2018.8644297","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644297","url":null,"abstract":"In this paper, two novel high-rate multiple-input multiple-out (MIMO) transmission schemes are proposed for dual polarized land mobile satellite (LMS) communications, where the polarization dimension and spatial dimension are jointly exploited to convey information. To be specific, we first extend the concept of polarized modulation (PMod) from single antenna LMS systems to multi-antennas LMS systems, which utilizes the parallel polarization states for bit mapping. This new scheme, namely generalized PMod (GPMod), is capable of improving the transmission rate linearly with the number of transmit antennas. For high-rate scenarios, the proposed GPMod needs to deal with the interference introduced by cross polarization, which may degrade the system performance. In order to circumvent the cross-polarization interference, we employ the concept of index modulation to both polarization dimension and spatial dimension and proposed a novel interference-free scheme, namely polarized spatial modulation (PMod-SM). Finally, an upper bound for the average bit error probability (ABEP) of the proposed scheme is derived for the generalized spatially correlated Rician channel model. Both analytical and simulation results are presented to demonstrate that the proposed PMod-SM scheme is capable of achieving considerable performance gains compared to the conventional PMod and the GPMod schemes.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114103465","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}

{"title":"Firefly Ultra Dense Networks with mmWave Fronthaul Links","authors":"Katharina Ackermann, V. Jamali, W. Gerstacker, Fredrik Wattenberg, J. Aulin, R. Krishnan, R. Schober","doi":"10.1109/GLOCOMW.2018.8644403","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644403","url":null,"abstract":"We consider the uplink of firefly ultra dense networks which combine the promising features of ultra dense deployment and centralized processing. In these networks, a large number of radio units, also referred to as firefly nodes (FNs), are spatially distributed over an area. The mobile devices (MDs) in the coverage area are simultaneously connected via sub-6 GHz radio frequency links to all FNs. Unlike the cloud radio access networks (C-RAN) architecture, in firefly ultra dense networks, the FNs forward the MDs' data through multi-hop mmWave links to one or multiple root nodes since the coverage radius of each mmWave link is limited. The root nodes forward the data via optical fiber links further to the central unit, where the MDs' signals are decoded. Since the amount of data received at each FN is potentially huge, efficient signal processing is needed at the FNs before the signals are forwarded to the next FNs. Therefore, we investigate locally-designed linear processing schemes, where all received signal streams are linearly filtered at each FN before being forwarded over an available mmWave link. Our simulation results reveal a significant performance improvement compared to a baseline scheme.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121441323","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}

{"title":"Parallel Transmission Using $M$-Point DFT for Image-Sensor-Based Visible Light Communication","authors":"Syuto Kibe, K. Kamakura, T. Yamazato","doi":"10.1109/GLOCOMW.2018.8644501","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644501","url":null,"abstract":"This paper proposes a parallel transmission (PT) system using <tex>$M$</tex>-point discrete Fourier transform (DFT) for image-sensor-based (IS-based) visible light communications (VLC). We make use of <tex>$M$</tex>-point inverse DFT (IDFT) to generate pulse width modulation (PWM) signals transmitted by <tex>$M$</tex> spatially aligned LEDs. The <tex>$M$</tex> PWM signals are pre-calculated to give <tex>$N$</tex> phase shifted carriers after <tex>$M$</tex>-point DFT, where <tex>$N=lfloor(M-1)/2rfloor$</tex> and <tex>$lfloor zrfloor$</tex> stands for the maximum integer not exceeding <tex>$z$</tex>. Therefore, the IS receiver of a high-speed camera captures the LEDs to obtain the <tex>$M$</tex> inputs to the DFT from the luminance values of the captured LEDs. During a symbol interval equal to the exposure time of the high-speed camera, <tex>$N log_{2}P$</tex> bits in total are simultaneously transmitted between the LEDs and IS-based receiver, when <tex>$P$</tex>-ary PSK is used for all the carriers. We experimentally demonstrate our PT system at the distance of nine meters between <tex>$M$</tex> PWM-modulated LEDs and a 2000-fps high-speed camera. Our experimental results validate that PSK symbols are demodulated without errors for smaller values of <tex>$M$</tex> and <tex>$P$</tex>, with controlling the aperture of the lens of the camera receiver.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121564049","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}

{"title":"Cooperative Interference Cancellation for Multi-Beam UAV Uplink Communication: A DoF Analysis","authors":"Liang Liu, Shuowen Zhang, Rui Zhang","doi":"10.1109/GLOCOMW.2018.8644095","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644095","url":null,"abstract":"Integrating unmanned aerial vehicles (UAVs) into the cellular network as new aerial users is a promising solution to meet their ever-increasing communication demands in a plethora of applications. Due to the high UAV altitude, the channels between UAVs and the ground base stations (GBSs) are dominated by the strong line-of-sight (LoS) links, which brings both opportunities and challenges. On one hand, a UAV can communicate with a large number of GBSs at the same time, leading to a higher macro-diversity gain as compared to terrestrial users. However, on the other hand, severe interference may be generated to/from the GBSs in the uplink/downlink, which renders the interference management with coexisting terrestrial and aerial users a more challenging problem to solve. To deal with the above two trade-off, this paper studies the uplink communication from a multi-antenna UAV to a set of GBSs in its signal coverage region. Among these GBSs, we denote available GBSs as the ones that do not serve any terrestrial users at the assigned resource block (RB) of the UAV, and occupied GBSs as the rest that are serving their respectively associated terrestrial users in the same RB. We propose a new cooperative interference cancellation strategy for the multi-beam UAV uplink communication, which aims to eliminate the co-channel interference at each of the occupied GBSs and in the meanwhile maximize the sum-rate to the available GBSs. Specifically, the multi-antenna UAV sends multiple data streams to selected available GBSs, which in turn forward their decoded data streams to their backhaul-connected occupied GBSs for interference cancellation. To draw useful insights, this paper focuses on characterizing the maximum degrees-of-freedom (DoF) achievable by our proposed strategy for UAV's sum-rate maximization in the high signal-to-noise ratio (SNR) regime, subject to the stringent constraint that all the occupied GBSs do not suffer from any interference in the UAV's uplink transmission. Numerical examples validate the DoF performance of our proposed strategy, as compared to benchmark schemes with fully cooperative, local or no interference cancellation.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127880359","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}