2014 IEEE Globecom Workshops (GC Wkshps)最新文献_第6页

Power allocation in OFDM based NOMA systems: A DC programming approach 基于OFDM的NOMA系统的功率分配:一种直流编程方法

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063568

P. Parida, Suvra Shekhar Das

{"title":"Power allocation in OFDM based NOMA systems: A DC programming approach","authors":"P. Parida, Suvra Shekhar Das","doi":"10.1109/GLOCOMW.2014.7063568","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063568","url":null,"abstract":"In this work, we have considered the downlink of an Orthogonal Frequency Division Multiplexing based Non Orthogonal Multiple Access system where transmission to multiple number of users is performed on the same sub-band (time-frequency resource unit) using Superposition Coding (SC) technique. At the receiver side, the SC coded symbols are recovered with Successive Interference Cancellation (SIC). Assuming that complete channel state information is present at the base station, we propose (1) co-channel user set selection, (2) power distribution among the multiplexed users on each sub-band, and (3) power allocation across the sub-bands to maximize the weighted sum rate of the system. Since the problem is a non-convex combinatorial optimization problem, two step heuristic solution is employed. In the first step, for each of the sub-bands, a greedy user selection and iterative sub-optimal power allocation algorithm based on Difference of Convex (DC) programming is presented. In the second step, exploiting the DC structure of the modified problem, power allocation across sub-band is carried out through the same iterative power allocation algorithm. Simulation results are provided to assess and compare the performance of the proposed algorithms.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122867718","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}

引用次数: 163

Adaptive downlink CoMP in heterogeneous cellular networks with imperfect overhead messaging 具有不完全开销消息的异构蜂窝网络中的自适应下行CoMP

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063599

Chun-Hung Liu

{"title":"Adaptive downlink CoMP in heterogeneous cellular networks with imperfect overhead messaging","authors":"Chun-Hung Liu","doi":"10.1109/GLOCOMW.2014.7063599","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063599","url":null,"abstract":"Coordinated multi-point (CoMP) transmission is an effective means of improving network throughput in heterogeneous cellular networks (HetNets). However, its performance is seriously weakened if imperfect coordination happens between base stations (BSs). Many prior CoMP works do not consider inter-cell overhead message delays such that a seemingly astonishing CoMP throughput gain is attained. In this paper, the quantization error and delay that actually exist in overhead messages was modeled and we developed a much tractable SIR model based on the stochastic geometry framework. We proposed adaptive CoMP that is applied to downlink zero-forcing beamforming (ZFBF) and it can mitigate the interference from the coordinated cells with delayed overhead messages. The bounds on the complementary cumulative distribution function (CCDF) of the SIR of a user are characterized such that the average throughput of a user is able to be analytically evaluated. Numerical results show that the proposed adaptive CoMP scheme can make the throughput gain very robust to the overhead delay and thus significantly increase the throughput even when BSs are not perfectly coordinated.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125356488","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}

引用次数: 3

Inter-network spatial sharing with interference mitigation based on IEEE 802.11ad WLAN system 基于IEEE 802.11ad WLAN系统的网络间空间共享与干扰抑制

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063523

W. Feng, Yong Li, Depeng Jin, Lieguang Zeng

{"title":"Inter-network spatial sharing with interference mitigation based on IEEE 802.11ad WLAN system","authors":"W. Feng, Yong Li, Depeng Jin, Lieguang Zeng","doi":"10.1109/GLOCOMW.2014.7063523","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063523","url":null,"abstract":"With the significant growth of mobile data traffic in the coming years, 60-GHz millimeter-wave (mm-wave) communication shows great potential in high throughput networks to meet this demand. The directional transmission in 60-GHz radio has motivated studies of spatial sharing (SPSH). In IEEE 802.11ad, a widely acknowledged protocol of 60-GHz system, spatial sharing inside a network is supported. In addition, different networks are recommended to transmit in non-overlapping period to mitigate inter-network interference, which is hard to employ in real system under circumstances such as heavy traffic load. However, there is no specific mechanism for spatial sharing with interference mitigation among networks in IEEE 802.11ad standard. Therefore, we propose an inter-network spatial sharing strategy in IEEE 802.11ad Wireless Local Area Networks (WLANs) in this paper. Specifically, the strategy includes SPSH report, which helps establish a complete interference and coexistence database. Corresponding time scheduling scheme is based on mutual avoidance of interference. Extensive simulations have shown that our proposed strategy enhances spatial gain and depicted more robust performance compared with existing mechanism in IEEE 802.11ad.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126101956","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}

引用次数: 13

Power and spectrum allocation for network coded primary-secondary cooperation in cognitive radio networks 认知无线电网络编码主次合作的功率和频谱分配

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063538

Zhihui Liu, Wenjun Xu, Shengyu Li, Xiao-han Lu, Jiaru Lin

引用次数: 4

A flexible 100-antenna testbed for Massive MIMO 大规模MIMO的柔性100天线试验台

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063446

Joao Vieira, Steffen Malkowsky, K. Nieman, Z. Miers, Nikhil Kundargi, Liang Liu, I. Wong, V. Öwall, O. Edfors, F. Tufvesson

{"title":"A flexible 100-antenna testbed for Massive MIMO","authors":"Joao Vieira, Steffen Malkowsky, K. Nieman, Z. Miers, Nikhil Kundargi, Liang Liu, I. Wong, V. Öwall, O. Edfors, F. Tufvesson","doi":"10.1109/GLOCOMW.2014.7063446","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063446","url":null,"abstract":"Massive multiple-input multiple-output (MIMO) is one of the main candidates to be included in the fifth generation (5G) cellular systems. For further system development it is desirable to have real-time testbeds showing possibilities and limitations of the technology. In this paper we describe the Lund University Massive MIMO testbed - LuMaMi. It is a flexible testbed where the base station operates with up to 100 coherent radio-frequency transceiver chains based on software radio technology. Orthogonal Frequency Division Multiplex (OFDM) based signaling is used for each of the 10 simultaneous users served in the 20 MHz bandwidth. Real time MIMO precoding and decoding is distributed across 50 Xilinx Kintex-7 FPGAs with PCI-Express interconnects. The unique features of this system are: (i) high throughput processing of 384 Gbps of real time baseband data in both the transmit and receive directions, (ii) low-latency architecture with channel estimate to precoder turnaround of less than 500 micro seconds, and (iii) a flexible extension up to 128 antennas. We detail the design goals of the testbed, discuss the signaling and system architecture, and show initial measured results for a uplink Massive MIMO over-the-air transmission from four single-antenna UEs to 100 BS antennas.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"323 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124571678","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}

引用次数: 272

Turbo Trellis Coded multiple access Turbo Trellis编码多重访问

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063544

A. Perotti, B. Popović

引用次数: 2

Secure cluster-based cooperative spectrum sensing against malicious attackers 基于集群的安全协同频谱感知抵御恶意攻击

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063610

S. Althunibat, Birabwa Joanitah Denise, F. Granelli

引用次数: 8

Web bugs in the cloud: Feasibility study of a new form of EDoS attack 云中的Web bug:一种新形式的dos攻击的可行性研究

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063387

N. Vlajic, Armin Slopek

{"title":"Web bugs in the cloud: Feasibility study of a new form of EDoS attack","authors":"N. Vlajic, Armin Slopek","doi":"10.1109/GLOCOMW.2014.7063387","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063387","url":null,"abstract":"Economic Denial of Sustainability (EDoS) is a new form of security attack specifically targeting Cloud-hosted websites/domains. The main goal of EDoS attack is to impose a significant financial burden on the victim through skillful and measured consumption of the victim's metered (pay-as-you-go) bandwidth. The most straightforward way to conduct an EDoS attack is by means of a custom-built or a rented botnet capable of executing application-layer DDoS. However, the common known disadvantages of botnet-based EDoS/DDoS attacks are: a) high cost in cases when the (rented) botnet needs to be used over a prolonged interval of time, b) high chance of bot-blacklisting that could result in a significantly diminished attack potential. The goal of our work presented in this paper was to investigate the technical feasibility of using spam-email with Web-bugs in order to engage the browsers of legitimate users in an EDoS attack. Compared to a botnet-based EDoS, such an attack would be far more difficult to detect and thwart for the victim, while imposing minimal to no cost to the attacker. Our preliminary results, involving real-world spam-email and an actual `victim' site set up on Amazon S3 Cloud, show that EDoS using Web-bugs is a technically feasible attack option with a reasonably sufficient attack potential. To the best of our knowledge, this study is the first one to combine the topics/concepts of EDoS, Web-bugs and spam-email, and point to a potentially problematic interplay among them.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127631196","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}

引用次数: 13

An energy efficient vertical handover decision algorithm 一种节能的垂直切换决策算法

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063587

Xavier Pons Masbernat, A. Mesodiakaki, C. Gruet, L. Naviner, F. Adelantado, L. Alonso, C. Verikoukis

引用次数: 7

Joint optimization of performance and economics in inter-domain traffic engineering 跨域交通工程中性能与经济性的联合优化

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063436

Rong Zhang, Yuehui Jin, Tan Yang, Yidong Cui, Yao Xiao

{"title":"Joint optimization of performance and economics in inter-domain traffic engineering","authors":"Rong Zhang, Yuehui Jin, Tan Yang, Yidong Cui, Yao Xiao","doi":"10.1109/GLOCOMW.2014.7063436","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063436","url":null,"abstract":"A major functionality of Inter-domain Traffic Engineering is to optimally allocate resources to meet traffic demand. We implement this functionality by introducing economics into the problem of performance optimization, achieving maximum performance while pursuing minimum economic costs. In this paper we propose the DOPE model (Dual-objective Optimization on Performance and Economics) as the foundation of building an Inter-domain Traffic Engineering architecture which optimizes performance and reduces economic costs simultaneously. We utilize the well-known concept of Nash Bargaining to optimize the performance so as to make the solution Pareto-efficient and fair. In addition we introduce the Revenue Sharing Contract in order to make the ISPs collaborate voluntarily to minimize the social economic costs. To protect ISPs from the leakage of sensitive information, we take a Decomposition Method, which combines the Sub-gradient Method with Lagrangian Relaxation Algorithm, and separates the overall dual-objective optimization problem into partial sub-problems. These sub-problems can be solved independently by ISPs. Our proposed approach is evaluated in several experiments with simulated networks. The results show that our approach converges quickly and performs as well as the centralized solution with full knowledge of the networks. Besides, our approach achieves both optimized performance and reduced economic costs, which is significantly better than existing unilateral methods. Therefore, we believe that our approach is an effective solution to the problem of Inter-domain Traffic Engineering, and will be highly adopted by ISPs when compared with existing approaches.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126937935","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}

引用次数: 0