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2011 Third International Conference on Communications and Mobile Computing最新文献

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A Fast Fixed Point Iteration Algorithm for Sparse Channel Estimation 稀疏信道估计的快速不动点迭代算法
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.11
Xue Jiang, W. Zeng, En Cheng
{"title":"A Fast Fixed Point Iteration Algorithm for Sparse Channel Estimation","authors":"Xue Jiang, W. Zeng, En Cheng","doi":"10.1109/CMC.2011.11","DOIUrl":"https://doi.org/10.1109/CMC.2011.11","url":null,"abstract":"Channels with a long but sparse impulse response arise in a variety of wireless communication applications, such as high definition television (HDTV) terrestrial transmission and underwater acoustic communications. By adopting the $ell_1$-norm as the sparsity metric of the channel response, the channel estimation is formulated as a complex-valued convex optimization problem. A fast fixed point iteration algorithm is developed to solve the resultant complex-valued $ell_1$-minimization problem. The proposed fast channel estimation algorithm is easy to implement and has a low computational complexity of $O(Nlog N)$ per iteration with $N$ the signal length. Simulation results are provided to demonstrate the performance of the proposed fixed point algorithm.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130496762","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
B-IRP: An Improving Integrity Report Protocol for Remote Attestation B-IRP:一种改进的远程认证完整性报告协议
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.106
Hongwei Zhou, Jinhui Yuan
{"title":"B-IRP: An Improving Integrity Report Protocol for Remote Attestation","authors":"Hongwei Zhou, Jinhui Yuan","doi":"10.1109/CMC.2011.106","DOIUrl":"https://doi.org/10.1109/CMC.2011.106","url":null,"abstract":"Trusted platform module (TPM) has little computation capability, and it is the performance bottleneck of remote attestation. In the scenario where the server is the attestation-busy entity which answers attestation requirement frequently, the massive delay is inevitable. Without the modification to TPM, we propose Batch Integrity Report Protocol (BIRP) to overcome the performance bottleneck. B-IRP bundles these requirements in interval as a batch requirement, and creates the response messages for these requirements with one expensive TPM operation. Discussion shows that B-IRP has improved the performance without loss of security.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128148221","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
LC-MAC: An Efficient MAC Protocol for the Long-Chain Wireless Sensor Networks LC-MAC:用于长链无线传感器网络的高效MAC协议
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.65
C. Fang, Hao Liu, L. Qian
{"title":"LC-MAC: An Efficient MAC Protocol for the Long-Chain Wireless Sensor Networks","authors":"C. Fang, Hao Liu, L. Qian","doi":"10.1109/CMC.2011.65","DOIUrl":"https://doi.org/10.1109/CMC.2011.65","url":null,"abstract":"In this paper, we present a new duty-cycle media access control(MAC) protocol, called Long-chain MAC protocol (LC-MAC), that exploits a mechanism for relay nodes booking in advance and transmitting in a burst manner in order to reduce the end-to-end delivery delay in a long-chain sensor network scenario without sacrificing energy efficiency. In LC-MAC, a super SYNC frame can travel across multiple hops and schedule the upcoming data packet delivery along the long-chain route. Each relay node sleeps and intelligently wakes up at a scheduled time, so that the upstream node can send the data packet to it and then it can immediately forwards the data packet to the downstream node. Our simulation results in ns-2 show that LC-MAC achieves significant improvement in end-to-end delivery delay over S-MAC without sacrificing energy efficiency or network throughput.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116574244","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: 20
A Subband Decision Feedback Equalizer for ATCS DTV Receivers with Improved Efficiency of Train Sequency 一种提高列车序列效率的ATCS数字电视接收机子带决策反馈均衡器
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.114
Lei Qin, Xiuchang Zhu, D. Hu
{"title":"A Subband Decision Feedback Equalizer for ATCS DTV Receivers with Improved Efficiency of Train Sequency","authors":"Lei Qin, Xiuchang Zhu, D. Hu","doi":"10.1109/CMC.2011.114","DOIUrl":"https://doi.org/10.1109/CMC.2011.114","url":null,"abstract":"LMS-DFE is preferred as an effective solution to coping with inter-symbol interference (ISI) for ATSC DTV receivers. In the DTV channel, echo delay often covers hundreds of symbols, by performance constrains, which leads to very large-scale equalizer with huge computational complexity. One consequence of the adaptive large-scale equalizer is that of very slow convergence. It is combined with error propagation, the inherent drawback of DFE, seriously deteriorating the performance of the receivers, especially in severe channels. In this paper, we apply the sub band processing to LMS DFE for sufficient speed of convergence, trying to open the eye diagram until the end of train sequence. It is ready for the decision-directed mode. Simulation results show that the proposed scheme improves the performance of the equalizer, especially in severe channels.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114406507","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
Assessment of LTE-R Using High Speed Railway Channel Model 基于高速铁路通道模型的LTE-R评估
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.34
K. Guan, Z. Zhong, B. Ai
{"title":"Assessment of LTE-R Using High Speed Railway Channel Model","authors":"K. Guan, Z. Zhong, B. Ai","doi":"10.1109/CMC.2011.34","DOIUrl":"https://doi.org/10.1109/CMC.2011.34","url":null,"abstract":"Long Term Evolution for Railway (LTE-R) is commonly believed to be the next generation wireless communication system for high speed railway. The main objective of this paper is to assess the performance of LTE-R under realistic conditions using a hybrid high speed railway channel model involving WINNER II Channel Model that was refined and validated using measurements made within the WP1 Channel Model work package in Europe, high speed train channel model in 3GPP and large-scaled models based on a group of measurements on Zhengzhou-Xian passenger dedicated line in China. The paper presents a detailed evaluation of the BER and PSD for LTE-R suitably dimensioned for the high speed railway channel. The investigation includes analysis of the Doppler shift caused by the velocity of transmitter and receiver, the multipath interference due to reflections and diffractions from terrains in the radio service coverage area, and other serious impairing factors. The results show that LTE-R has promising potential to be used in a high speed railway environment.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115276008","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: 113
A Collaborative Network Security Management System in Metropolitan Area Network 城域网协同网络安全管理系统
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.130
Beipeng Mu, Xinming Chen, Zhen Chen
{"title":"A Collaborative Network Security Management System in Metropolitan Area Network","authors":"Beipeng Mu, Xinming Chen, Zhen Chen","doi":"10.1109/CMC.2011.130","DOIUrl":"https://doi.org/10.1109/CMC.2011.130","url":null,"abstract":"Network Security Appliances are deployed at the vantage point of the Internet to detect security events and prevent attacks. However, these appliances are not so effective when it comes to distributed attacks such as DDoS. This paper presents a design and implementation of collaborative network security management system (CNSMS), which organize the NetSecu nodes into a hybrid P2P and hierarchy architecture to share the security knowledge. NetSecu nodes are organized into a hierarchy architecture so they could realize different management or security functions. In each level, nodes formed a P2P networks for higher efficiency. To guarantee identity trustworthy and information exchange secure, PKI infrastructure is deployed in CNSMS. Finally experiments are conducted to test the computing and communication cost.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124019586","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: 16
Modelling Energy Consumption for the Cooperative MAC Based on Opportunistic Relaying 基于机会中继的合作MAC能耗建模
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.37
Nan Li, Yueming Cai, Xiaotie Xu, Naiping Cheng
{"title":"Modelling Energy Consumption for the Cooperative MAC Based on Opportunistic Relaying","authors":"Nan Li, Yueming Cai, Xiaotie Xu, Naiping Cheng","doi":"10.1109/CMC.2011.37","DOIUrl":"https://doi.org/10.1109/CMC.2011.37","url":null,"abstract":"Opportunistic relaying is an important relay selection scheme for cooperative communication, it can dynamically select relay depending on instantaneous channel condition, which is a especially suitable for distributed networks. Some cooperative MAC based on opportunistic relaying have been proposed to enhance the system throughput. However, since the throughput is normally related to their energy consumption in distributed networks, it is important to examine the impact of opportunistic relaying on energy consumption. In this paper, we propose an energy analytical model for the cooperative MAC based on opportunistic relaying. Using the Modified Coop MAC (MCoopMAC) as a case, we have shown the efficacy of the proposed analytical model. Moreover, we find the optimum parameter value for opportunistic relaying and reveal the impact of opportunistic relaying on the energy consumption.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121756818","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
ACK Offloading for Reliable Multipath Transfer over Self-Contention Wireless Network 自争用无线网络中可靠多径传输的ACK卸载
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.88
Wang Yang, Hewu Li, Jianping Wu
{"title":"ACK Offloading for Reliable Multipath Transfer over Self-Contention Wireless Network","authors":"Wang Yang, Hewu Li, Jianping Wu","doi":"10.1109/CMC.2011.88","DOIUrl":"https://doi.org/10.1109/CMC.2011.88","url":null,"abstract":"Multipath between end-to-end hosts has been prevailing in Heterogeneous Wireless Networks nowadays, and thus path selection has become an important issue in research for reliable multipath transfer. Most existed path selection algorithms assume that the data and ACK paths are independent, which does not hold for self-contention based wireless networks. This paper has analyzed self-contention's influence on throughput and indicated that throughput would be improved by ACK offloading. Furthermore, throughput of ACK offloading is analyzed and the upper bound of its throughput is given. Simulation and experiment results show that the throughput gain of ACK offloading is up to 150% and resilience to the increase of alternative ACK path's delay.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131259627","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
Implementation of EPON Systems Supporting Accurate Time Synchronization 支持精确时间同步的EPON系统的实现
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.56
Zhen Wang, Mei Wang, Ke He, Xue Chen
{"title":"Implementation of EPON Systems Supporting Accurate Time Synchronization","authors":"Zhen Wang, Mei Wang, Ke He, Xue Chen","doi":"10.1109/CMC.2011.56","DOIUrl":"https://doi.org/10.1109/CMC.2011.56","url":null,"abstract":"In this paper factors affecting accuracy of time synchronization in EPON are analysed and the scheme of time synchronization in EPON based on IEEE1588v2 protocol is designed and implemented by FPGA. Experimental result shows that the scheme is feasible and good time synchronization accuracy about 20 nanoseconds can be reached.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131681142","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: 4
A Spread Spectrum Audio Watermarking System with High Perceptual Quality 一种高感知质量扩频音频水印系统
2011 Third International Conference on Communications and Mobile Computing Pub Date : 2011-04-18 DOI: 10.1109/CMC.2011.30
Xuemin Zhao, Yuhong Guo, Jian Liu, Yonghong Yan
{"title":"A Spread Spectrum Audio Watermarking System with High Perceptual Quality","authors":"Xuemin Zhao, Yuhong Guo, Jian Liu, Yonghong Yan","doi":"10.1109/CMC.2011.30","DOIUrl":"https://doi.org/10.1109/CMC.2011.30","url":null,"abstract":"We propose a system to embed watermark message into audio signal, which can be used for copyright protection. It uses spread spectrum theory to generate a watermark that resistants to different removal attempts. We exploit the psychoacoustic auditory model to guarantee the audio signal's perceptual quality after the watermark embedding procedure. Recovery is performed without knowledge of the original audio signal. We use different pseudo-random sequence in synchronization marks and watermark message to avoid the false synchronization in watermark message. Experimental results show that our watermarking scheme is robust against common signal processing attacks while keeps the watermarked audio a high perceptual quality.","PeriodicalId":263741,"journal":{"name":"2011 Third International Conference on Communications and Mobile Computing","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131691107","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
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