... IEEE Global Communications Conference. IEEE Global Communications Conference最新文献_第8页

On the soft information extraction from hard-decision outputs in MLC NAND flash memory MLC NAND闪存硬决策输出软信息提取研究

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503608

Daesung Kim, Jinho Choi, J. Ha

引用次数: 3

Proportional fair scheduling algorithm for SC-FDMA in LTE uplink LTE上行链路SC-FDMA的比例公平调度算法

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503881

Jeongchang Kim, Donggeun Kim, Youngnam Han

引用次数: 22

Rate selection for wireless networks with intraand inter-session network coding 具有会话内和会话间网络编码的无线网络的速率选择

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503862

Kaiqian Ou, Yinlong Xu, Shengli Fu

{"title":"Rate selection for wireless networks with intraand inter-session network coding","authors":"Kaiqian Ou, Yinlong Xu, Shengli Fu","doi":"10.1109/GLOCOM.2012.6503862","DOIUrl":"https://doi.org/10.1109/GLOCOM.2012.6503862","url":null,"abstract":"A recent study shows that the throughput of wireless networks can be further improved via combining intra-and intersession network coding (I2NC). The main idea of I2NC is to protect against packet loss by introducing additional redundancy via intra-session coding. However, the amount of redundancy depends on the quality of overhearing links. The poorer an overhearing link is, the less fraction of information is overheard, which results in a potential increase of redundancy needed. While lower transmission rate promises better link quality, it also means lower throughput. Motivated by this, we study the impact of transmission rates on network throughput and formulate the rate selection into an optimization problem. Also, we investigate the flow partition for the inter-session coding. In other words, we consider which sessions would be grouped together through network coding to improve the throughput. We aim to design a joint rate and partition selection in a wireless star network, so as to maximize the network throughput. We prove that finding the optimal joint rate selection and flow partition is NP-hard. An efficient heuristic algorithm is proposed for the networks with heterogenous rates and sessions that can be grouped together for the inter-session network coding. Simulation results show that the proposed scheme achieves throughput gains of up to 185% as compared to what is gained with a rate-unaware I2NC scheme.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"5 1","pages":"4707-4712"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88702179","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: 2

Prediction handover trigger scheme for reducing handover latency in two-tier Femtocell networks 减少两层Femtocell网络切换延迟的预测切换触发方案

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503934

Hongjia Li, S. Ci, Zejue Wang

{"title":"Prediction handover trigger scheme for reducing handover latency in two-tier Femtocell networks","authors":"Hongjia Li, S. Ci, Zejue Wang","doi":"10.1109/GLOCOM.2012.6503934","DOIUrl":"https://doi.org/10.1109/GLOCOM.2012.6503934","url":null,"abstract":"Service continuity in two-tier Femtocell networks, especially impaired by the handover latency, remains as a problem to be solved. Motivated by this problems, a Layer 3 prediction handover scheme is proposed, which can be integrated into the user equipment (UE) part of industry-preferable mobile-assisted network-controlled handover (MANCH). The main contributions of the proposed scheme include: 1) based on time series analysis theory, the prediction model of Layer 3 (L3) filtered reference signal received power (RSRP) is constructed to activate L3 handover prior to Layer 2 (L2) handover procedure; 2) in order to improve the reliability and robustness of the L3 prediction model, a two-priority handover trigger event evaluation method is designed, where the classical and prediction handover trigger event evaluation parts co-exist, and the former is prior to the latter; 3) the relationship between defined prediction handover gain (PHG) and the probability of false handover prediction trigger is derived. In simulations, to evaluate the robustness of the proposed scheme, a module of UEs' movement pattern is designed, considering characteristics of the UE's movement pattern. Results of the performance evaluation show that handover latency of indoor handover UEs can be effectively reduced with high prediction accuracy.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"34 1","pages":"5130-5135"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76635245","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: 5

A novel multi-objective relay-jammer pair selection scheme in wireless cooperative networks 一种新的无线合作网络多目标中继干扰机对选择方案

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6504023

Li Wang, Xi Zhang, Mei Song, Tenghui Ke

引用次数: 3

Secret key agreement for cooperative wireless communications: bounds and efficient protocol design 协作无线通信的密钥协议:边界和高效协议设计

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503481

Ning Wang, Ning Zhang, T. Gulliver

引用次数: 0

Enhanced Bayesian compressive sensing for ultra-wideband channel estimation 基于增强贝叶斯压缩感知的超宽带信道估计

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503753

Xiantao Cheng, Y. Guan, Guangrong Yue, Shaoqian Li

引用次数: 6

Rate adaptation strategy for video streaming over multiple wireless access networks 多无线接入网络视频流的速率自适应策略

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6504037

Min Xing, Siyuan Xiang, Lin X. Cai

{"title":"Rate adaptation strategy for video streaming over multiple wireless access networks","authors":"Min Xing, Siyuan Xiang, Lin X. Cai","doi":"10.1109/GLOCOM.2012.6504037","DOIUrl":"https://doi.org/10.1109/GLOCOM.2012.6504037","url":null,"abstract":"Video streaming is gaining popularity among mobile users. The latest mobile devices, such as smart phones and tablets are equipped with multiple wireless network interfaces. How to efficiently and cost-effectively utilize multiple links to improve the video streaming quality needs to be investigated. In order to maintain high video streaming quality while reduce the wireless service cost, in this paper, the optimal video streaming process with multiple links is formulated as a Markov Decision Process (MDP). The reward function is designed to consider the quality of experience (QoE) requirements for video traffic, such as the interruption rate, average playback quality, playback smoothness and wireless service cost. Using dynamic programming, the MDP can be solved to obtain the optimal streaming policy. To evaluate the performance of the proposed multi-link rate adaptation (MLRA) algorithm, we implement a testbed using the Android mobile phone and the open-source X264 video codec. Experimental results demonstrate the feasibility and effectiveness of the proposed MLRA algorithm for mobile video streaming applications, which outperforms the existing state-of-the-art one.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"12 1","pages":"5745-5750"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87662481","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: 23

Constructing time-varying contact graphs for heterogeneous delay tolerant networks 异构容延迟网络的时变接触图构造

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503963

X. Hong, Bo Gu, Yuguang Zeng, Jingyuan Zhang

{"title":"Constructing time-varying contact graphs for heterogeneous delay tolerant networks","authors":"X. Hong, Bo Gu, Yuguang Zeng, Jingyuan Zhang","doi":"10.1109/GLOCOM.2012.6503963","DOIUrl":"https://doi.org/10.1109/GLOCOM.2012.6503963","url":null,"abstract":"Human mobility, hence the movement pattern of mobile devices, often confines to relatively local geographic areas. Such a movement pattern reduces the opportunities for a message to be disseminated to a more global geographical region using the encounter-based “store-carry-forward” routing approach. On the other hand, different local areas often overlap to cover the entire region. A feasible communication architecture to help message dissemination is to deploy static storage-and-communication devices at those overlapping areas to serve as relays between the local areas. In this paper, we introduce the method to derive the simulation model for this heterogeneous network from contact trace and GPS trace of buses. Our main focus is to model communication properties between the static nodes and the mobile nodes. Typically, they are time-varying link delays formed by a collection of multiple mobile nodes. We further use a Markovian model to describe the time dependency among link delays at each static nodes and use the states to develop a network model for simulation. In the paper, we present simulation results to validate the reproduction of the mobility with the original traces by comparing routing performance. We show that the proposed network model can be used for performance evaluations with inherited realistic. The contributions of this work reside in the reproducibility to the real world traces and its flexibility in configurations. Further, it is the first simulator that enables to produce contact graph for a heterogeneous network with time-varying link properties. Its ability goes beyond simply calculating encounter events, but is well suitable for protocol evaluation in opportunistic networks, mobile social networks and delay tolerant networks.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"18 1","pages":"5302-5307"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80370126","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

Privacy-preserving and secure top-k query in two-tier wireless sensor network 两层无线传感器网络中的隐私保护和安全top-k查询

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2012-12-01 DOI: 10.1109/GLOCOM.2012.6503135

Xiaojing Liao, Jianzhong Li

{"title":"Privacy-preserving and secure top-k query in two-tier wireless sensor network","authors":"Xiaojing Liao, Jianzhong Li","doi":"10.1109/GLOCOM.2012.6503135","DOIUrl":"https://doi.org/10.1109/GLOCOM.2012.6503135","url":null,"abstract":"In two-tier wireless sensor networks, resource-rich storage nodes at the upper tier collect sensing data from resource-poor sensor nodes at the low tier, and then answer queries from the user. Sensor nodes perform sensing task and submit sensing data in one time-slot to the nearest storage node while storage nodes answer and process the query from the network owner. However the storage nodes confront serious security concerns. Storage nodes may be compromised and leak the sensitive data as well as returning fake query result. Therefore, it is important to protect the privacy and verify the query results. In this paper, we define and solve the practical and challenging problem of privacy-preserving and verifiable top-k query processing performed on the time-slot sensing data set in two-tier sensor network, and establish a set of privacy and correctness requirements for such a secure top-k query scheme to become a reality. We propose the basic PriSecTopk scheme by using order-preserving encryption, and then improve it step by step to achieve various privacy requirements as well as the correctness requirements in three levels of threat models. Theoretical analysis and experiment on the real-world data set successfully validate the efficacy and efficiency of the proposed schemes.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"16 1","pages":"335-341"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74084063","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: 29