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2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing最新文献

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Reinforcement learning based Dynamic Network Self-optimization for heterogeneous networks 基于强化学习的异构网络动态网络自优化
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291353
Z. Feng, Li Tan, Wei Li, T. Gulliver
{"title":"Reinforcement learning based Dynamic Network Self-optimization for heterogeneous networks","authors":"Z. Feng, Li Tan, Wei Li, T. Gulliver","doi":"10.1109/PACRIM.2009.5291353","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291353","url":null,"abstract":"The coexistence of different heterogeneous Radio Access Technologies (RATs) is a significant feature of current wireless networks. Thus, it is important for network elements, such as the Base Stations (BSs) of cellular networks or access points (APs) of wireless local area networks (WLANs) to be reconfigurable according to the real-time network environment. This will enable interconnection between different networks. In this paper, we propose an efficient distributed reconfiguration algorithm: the Dynamic Network Self-optimization Algorithm (DNSA). This algorithm is based on the widely used Q-learning algorithm and regards the network self-optimization entity of each radio access network as an independent intelligent agent. Multiple agents perform the optimization cooperatively to reduce the system blocking rate and improve network revenue. In the proposed algorithm, the dynamic network self-optimization problem is transformed into a multi-agent reinforcement learning problem, which has much lower complexity and better performance.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114598191","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: 11
Forensic information acquisition in mobile networks 移动网络中的取证信息采集
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291378
David Irwin, R. Hunt
{"title":"Forensic information acquisition in mobile networks","authors":"David Irwin, R. Hunt","doi":"10.1109/PACRIM.2009.5291378","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291378","url":null,"abstract":"Acquisition of data stored on mobile network client equipment including 3G devices, Personal Digital Assistants, Pocket PCs running operating systems such as Symbian and Windows Mobile may be required for forensic purposes. Access to such devices across wireless and mobile interfaces raises challenges which do not normally exist when forensic analysis of hard drives and other storage media occurs. Only limited research has been carried out in this area of wireless forensics and this paper discusses the design and proofof- concept testing of a forensic application tool which runs on a desktop computer and can be used to extract data from mobile devices consistent with forensic analysis used on non-mobile equipment. This paper addresses new ideas in data acquisition over wireless networks irrespective of the underlying reason for the acquisition requirements of such information. This project succeeded in demonstrating the mapping of a mobile device's internal and external memory and the copying of folders and files from memory to a computer across a mobile interface.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123944128","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
Simple series form formula of BER performance for DBPSK/OFDM signals in time selective nonlinear fading channels 时间选择性非线性衰落信道中DBPSK/OFDM信号误码率的简单级数形式公式
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291373
A. Yamakita, Yuichiro Goto, F. Maehara
{"title":"Simple series form formula of BER performance for DBPSK/OFDM signals in time selective nonlinear fading channels","authors":"A. Yamakita, Yuichiro Goto, F. Maehara","doi":"10.1109/PACRIM.2009.5291373","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291373","url":null,"abstract":"This paper proposes a simple series form formula of the bit error rate (BER) for DBPSK/OFDM signals under time selective nonlinear fading channels. The proposed approach derives the theoretical BER in the presence of non-linear distortion and time selective fading effects. Since the BER is represented by the simple series form formula, the proposed approach frees us from the time-consuming computer simulations. The validity of the proposed approach is confirmed by the agreement with the computer simulation results under various kinds of system parameters such as the input back-off (IBO) and the normalized maximum Doppler frequency.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115167296","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
Optimal contrast enhancement for tone-mapped low dynamic range images based on high dynamic range images 基于高动态范围图像的色调映射低动态范围图像的最佳对比度增强
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291399
K. Yip, O. Au, Ngai-Man Cheung, Chun-Hung Liu, Cheuk-Hong Cheng
{"title":"Optimal contrast enhancement for tone-mapped low dynamic range images based on high dynamic range images","authors":"K. Yip, O. Au, Ngai-Man Cheung, Chun-Hung Liu, Cheuk-Hong Cheng","doi":"10.1109/PACRIM.2009.5291399","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291399","url":null,"abstract":"Tone-mapping refers to methods for rendering high dynamic range (HDR) images on low dynamic range (LDR) displays. However, strong tonal compression in tone mapping process often causes those tone-mapped LDR images to have much less local contrast compared with the original HDR images. In this paper, we propose a novel contrast enhancement algorithm to bring the local contrast of the tonemapped images closer to that of the HDR images and formulate it as an optimization problem. Simulation results suggest that the proposed method can greatly enhance the visual quality of the tone-mapped images by bringing out details in the extreme bright and dark regions.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128738769","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
A new multicode interference cancellation method for HSDPA system HSDPA系统中一种新的多码干扰消除方法
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291323
Sungbong Kim, Seung-Joo Kim, Changtaek Shin, Jinyong Lee, Younglok Kim
{"title":"A new multicode interference cancellation method for HSDPA system","authors":"Sungbong Kim, Seung-Joo Kim, Changtaek Shin, Jinyong Lee, Younglok Kim","doi":"10.1109/PACRIM.2009.5291323","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291323","url":null,"abstract":"This paper proposes a new multicode interference cancellation algorithm which uses frequency responses of the channelization codes used in HSDPA system. The proposed algorithm estimates the multicode interference components at the chip rate, and then it improves the detection performance e by removing the estimated interferences from received signal. The computer simulation shows that the receiver adapting the proposed algorithm decreases the receiving power by 6.0 dB to achieve 10−2 uncoded BER compared with conventional LMMSE algorithm.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130305407","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
VESS: a Versatile Extensible Security Suite for MANET routing 用于MANET路由的多功能可扩展安全套件
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291240
Jung-Tzu Chang, S. Gundala, Teng-Sheng Moh, M. Moh
{"title":"VESS: a Versatile Extensible Security Suite for MANET routing","authors":"Jung-Tzu Chang, S. Gundala, Teng-Sheng Moh, M. Moh","doi":"10.1109/PACRIM.2009.5291240","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291240","url":null,"abstract":"This paper presents a powerful and versatile security suite for the AODV (Ad-hoc On-demand Distance Vector) routing protocol. It offers a coverage on common security aspects such as encryption and authentication, and it can be easily modified to work with any distance-vector-based routing for MANET (Mobile Ad hoc Networks). The suite utilizes powerful authentication and user-adjustable encryptions based on digital certificate chaining and popular ciphers such as DES, AES, and RSA. The security strength can be customized to reach a desired balance with the performance of the network. The suite has a highly modular design, which allows additional security strength to be added on top of the existing framework. This attractive feature enables heterogeneous applications to utilize various levels of security routing on the same MANET. The multiple levels of security strengths are careful analyzed. The range of impacts on network performance is also illustrated by simulation, which shows that the strongest security scheme still achieves about 75% of the throughput, while incurs 20–30% additional delay.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"54 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120924312","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: 9
Hierarchical peer-to-peer overlay with cluster-reputation-based adaptation 基于集群声誉适应的分层点对点覆盖
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291286
Chih-Lin Hu, Tzu-Han Kuo
{"title":"Hierarchical peer-to-peer overlay with cluster-reputation-based adaptation","authors":"Chih-Lin Hu, Tzu-Han Kuo","doi":"10.1109/PACRIM.2009.5291286","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291286","url":null,"abstract":"This paper proposes a hierarchical cluster-based peer-to-peer overlay scheme based on both of partially-centralized and semi-structured overlay models in light of network locality and proximity. This joint design can keep up system efficacy and flexibility in dynamic networks where peer churn, peer mobility and search redundancy become stickier. In addition, a special reputation tree is exploited to mitigate the free-riding problem over a large-scale system. By simulation results, the proposed scheme can react to above issues without loss of prominent performance.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115868995","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
Relay selection scheme using directional antennas for cellular networks 蜂窝网络中使用定向天线的中继选择方案
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291303
Poongovan Ponnavaikko, Sarah Kate Wilson, J. Holliday
{"title":"Relay selection scheme using directional antennas for cellular networks","authors":"Poongovan Ponnavaikko, Sarah Kate Wilson, J. Holliday","doi":"10.1109/PACRIM.2009.5291303","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291303","url":null,"abstract":"Cellular base stations are expensive to install as they require the operator to lease real estate and establish back-haul connectivity to the public network. With increasing demand for bandwidth, service providers are installing more and more relay base stations to supplement the main base station. Although relays help increase the coverage and capacity of the network, they also end up raising the net interference in the system. Decentralized relay selection algorithms that do not take interference into account, could end up under-using the capacity of the network. In this paper we propose a two-hop decentralized relay selection scheme using directional antennas that mitigates the effects of interference and performs better than the “nearest relay selection”[1] algorithm in networks with less number of relay stations. Furthermore we propose a relaying scheme where the network adaptively chooses a relay selection algorithm to use, based on the current number of relay stations in the network.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126330808","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
Architectural and compiler support for the extraction and execution of coarse-grain parallelism 架构和编译器支持粗粒度并行性的提取和执行
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291236
T. Abdelrahman
{"title":"Architectural and compiler support for the extraction and execution of coarse-grain parallelism","authors":"T. Abdelrahman","doi":"10.1109/PACRIM.2009.5291236","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291236","url":null,"abstract":"This paper presents a summary of our work on the Multi-Level Computing Architecture (MLCA) project. The goal of this project is to provide novel architectural and compiler support for the extraction and execution of coarse-grain parallelism in multi-media applications on parallel-embedded systems. We first give an overview of the architecture and its novel features. We then describe the need for and the details of its compiler support. We present an experimental evaluation of a prototype MLCA system, including the architecture and the compiler. The results indicate that the MLCA is a promising architecture for supporting coarse-grain parallelism on parallel embedded systems.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126512033","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
Hybrid Wyner-Ziv video coding structure for removing feedback channel 用于去除反馈信道的混合Wyner-Ziv视频编码结构
2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 2009-10-23 DOI: 10.1109/PACRIM.2009.5291256
Hoyoung Lee, T. Tillo, B. Jeon
{"title":"Hybrid Wyner-Ziv video coding structure for removing feedback channel","authors":"Hoyoung Lee, T. Tillo, B. Jeon","doi":"10.1109/PACRIM.2009.5291256","DOIUrl":"https://doi.org/10.1109/PACRIM.2009.5291256","url":null,"abstract":"This paper proposes a hybrid Wyner-Ziv video coding scheme without requiring the feedback channel which is a limiting factor for many practical applications. In order to remove the feedback channel, we develop a hybrid structure combining the conventional predictive video coding and the Wyner-Ziv video coding schemes. From the information of the neighboring predictive-coded macroblocks, the proposed hybrid scheme estimates the required channel code rate of the Wyner-Ziv coded macroblocks in order to eliminate the requirement of feedback channel. Experiment results indicate that it achieves good coding performance on sequences having linear and slow motion.","PeriodicalId":217751,"journal":{"name":"2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126679180","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
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