2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)最新文献_第9页

Throughput-optimal user association in energy harvesting relay-assisted cellular networks 能量收集中继辅助蜂窝网络中吞吐量最优用户关联

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992165

Yanzi Song, Ming Zhao, Wuyang Zhou, Hui Han

{"title":"Throughput-optimal user association in energy harvesting relay-assisted cellular networks","authors":"Yanzi Song, Ming Zhao, Wuyang Zhou, Hui Han","doi":"10.1109/WCSP.2014.6992165","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992165","url":null,"abstract":"We study the user association problem targeting on the throughput optimization for energy harvesting (EH) relay-assisted cellular networks where the base stations (BSs) are powered by grid power and the relay stations (RSs) are powered by renewable energy. Since the harvested energy of RS is stochastic and not always large enough, our challenge is how to match the user association with the energy arrival rate of RS so as to maximize the throughput of the network. For this purpose, we propose a dynamic bias based user association policy which means the user is associated with the BS/RS that provides the strongest-biased-average-received-power, and maximize the throughput by optimizing the bias with different energy constraints. Using tools from stochastic geometry and continuous time Markov chain (CTMC), we first formulate the problem as a throughput-optimal and energy-constrained problem with respect to the bias. Then, by solving the optimization problem, we derive the closed expression of the optimal bias maximizing the throughput. Numerical results show that our dynamic bias based user association policy can always outperform that without bias, especially when the RSs are energy-limited.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"276 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115837255","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: 14

Demystifying the magic of cache thresholds in the Android media framework 揭开Android媒体框架中缓存阈值的神秘面纱

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992024

Jian Huang, Di Wu, Jian-Qian He

{"title":"Demystifying the magic of cache thresholds in the Android media framework","authors":"Jian Huang, Di Wu, Jian-Qian He","doi":"10.1109/WCSP.2014.6992024","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992024","url":null,"abstract":"Mobile video streaming has gained growing popularity with the rapid adoption of mobile devices (e.g., smart-phones, tablets, pads). In the market of mobile devices, a large portion were installed with Google's Android as the default operating system. A clear understanding of the Android media framework is of great importance for the performance optimization of mobile video streaming. In this paper, we focus our attention on demystifying the magic of cache thresholds in the Android media framework. As the key control parameters, cache thresholds play an important role in regulating the downloading behavior of a mobile device, which directly affects the cost and quality of mobile streaming. We built a dedicated testbed and conducted a measurement study to measure the cost and quality of mobile video streaming when varying cache thresholds. Our measurements pointed out that, the sunk cost incurred by user viewing abortion will grow with the increase of either high or low threshold. More battery energy can be saved if lowering the low threshold. In addition, the freezing phenomenon can be mitigated significantly by increasing the low threshold. It is also interesting to observe that there exists a clear cost-quality tradeoff when varying cache thresholds. It implies that the current static cache management scheme is unsuitable to achieve the best cost-quality tradeoff. We finally discussed a few implications of our results on cache optimization of mobile video streaming.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114727924","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: 1

Energy efficient resource allocation for OFDM multi-relay cellular networks OFDM多中继蜂窝网络的节能资源分配

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992203

Shuang-Cheng Yang, Yueming Cai, Wendong Yang, Jianchao Zheng, Zhang Tao

引用次数: 2

Impact of different LED-spacing in arrayed LED transmitter on VLC channel modeling 阵列LED发射机中不同LED间距对VLC通道建模的影响

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992030

Jupeng Ding, Kun Wang, Zhengyuan Xu

引用次数: 13

Practical private information retrieval supporting keyword search in the cloud 实用的私有信息检索，支持云中的关键字搜索

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992210

Mengke Yu, Kaichen Yang, Lingbo Wei, Jinyuan Sun

{"title":"Practical private information retrieval supporting keyword search in the cloud","authors":"Mengke Yu, Kaichen Yang, Lingbo Wei, Jinyuan Sun","doi":"10.1109/WCSP.2014.6992210","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992210","url":null,"abstract":"In cloud computing environment, just protecting the contents of the queries from users to a large database server is far away from enough. Because it does not protect the leak of access patterns from careful observations. It is thus important to make sure the server learning nothing about the queries including access patterns. However, this implies an expensive computation or communication cost of all the data on the server. Existing solutions are not efficient due to their impractical communication and computation cost. Besides, most of them do not support keyword search. In this paper, we introduce the mechanism of pricing to solve the problem of impractical cost. Using our scheme called KSPIR, we achieve the minimum communication and computation cost according to the flexible privacy and budget specified by users. It is indeed a kind of tradeoff between the cost of retrieval and the degree of privacy. It is worth noting that it also supports keyword search. It allows users to retrieve the data items containing the keywords they are interested in. The experimental results confirm the correctness and efficiency of KSPIR.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122870323","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

Optimal multi-slot spectrum sensing and transfer in multichannel cognitive radio 多信道认知无线电中最优多时隙频谱感知与传输

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992037

Xin Liu, Weizhi Zhong, Q. Hu, Fanqiang Kong, Qingfeng Jing

引用次数: 0

Low-complexity sphere decoding for generalised spatial modulation 广义空间调制的低复杂度球解码

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992084

Yuanqiang Wang, J. Ge, Juan Chen

引用次数: 3

Analysis on scattering parameters for coupled microstrip lines with bend discontinuities 弯曲不连续耦合微带线散射参数分析

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992021

Jiao He, L. Gui, Tao Jiang, Cong Zhou, Lang Lv

引用次数: 2

Security performance of multiple antennas multiple relaying networks with outdated relay selection 中继选择过时的多天线多中继网络的安全性能

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992096

Lei Wang, Shiming Xu, Weiwei Yang, Wendong Yang, Yueming Cai

引用次数: 6

PHY security enhancement in analog network coding based on artificial noise 基于人工噪声的模拟网络编码物理层安全性增强

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992016

Dan Deng, Zhenyu Yang, Ming Zhao

引用次数: 5