2010 The 5th Annual ICST Wireless Internet Conference (WICON)最新文献_第2页

Optimized content caching and request capture in CNF networks 优化了CNF网络中的内容缓存和请求捕获

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8498

Lijun Dong, Dan Zhang, Yanyong Zhang, D. Raychaudhuri

{"title":"Optimized content caching and request capture in CNF networks","authors":"Lijun Dong, Dan Zhang, Yanyong Zhang, D. Raychaudhuri","doi":"10.4108/ICST.WICON2010.8498","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8498","url":null,"abstract":"In order to meet the overwhelming demands of content retrieval for mobile end users, a novel architecture for the next-generation Internet called Cache-and-Forward (CNF) has been proposed to transport content as large packages in a hop by hop manner towards the destination, instead of transporting a stream of small packets along an established TCP/IP connection. In this paper, we investigate how CNF network architecture can be designed for efficient content retrieval for wireless mobile nodes. In particular, we look at Integrated Caching in which we assume each CNF router on the future Internet can cache contents that pass by and reply to content requests with its local copy. We name this content delivery method Cachingn-Capture(CC). We develop a mathematical model for CC to optimize the average content retrieval latency with limited storage on each CNF router. We propose Sequential Reassignment(SR) algorithm to solve the optimization problem. We compare the performance of the derived optimal solutions against our integrated caching and routing heuristics. The results show the Sequential Reassignment algorithm significantly reduces the average content retrieval latency by as high as 70%.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"24 13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127598125","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

Limited feedback scheme based on zero-forcing precoding for multiuser MIMO-OFDM downlink systems 多用户MIMO-OFDM下行系统中基于强制零预编码的有限反馈方案

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8548

Zhiyong Chen, Wenbo Wang, M. Peng, Fengming Cao

引用次数: 5

An effective hybrid GACSA -based multi-user detection for ultra-wideBand communications systems 一种有效的基于混合GACSA的超宽带通信系统多用户检测

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8624

J. Wen, Ho-Lung Hung, Chien-Chi Chao, Chia-Hsin Cheng

{"title":"An effective hybrid GACSA -based multi-user detection for ultra-wideBand communications systems","authors":"J. Wen, Ho-Lung Hung, Chien-Chi Chao, Chia-Hsin Cheng","doi":"10.4108/ICST.WICON2010.8624","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8624","url":null,"abstract":"In this paper, we investigate the performance of various interference cancellation techniques in direct-sequence ultra-wideband (DS-UWB) communication systems. Multiple access interference (MAI) causes the performance of the conventional single user detector in DS-UWB systems to degrade. Due to high complexity of the optimum multiuser detector, suboptimal multiuser detectors with less complexity and reasonable performance have received considerable attention. A hybrid approach that employs a genetic algorithm (GA) and chaos algorithm (CSA) for the MUD problem in UWB communication systems is proposed. By taking advantage of heuristic values and the collective intelligence of GACSA, the proposed detector offers almost the same bit error rate (BER) performance as the full-search-based optimum multiuser detector does, while greatly reducing the computational complexity. The near-far resistance of the GACSA-based multiuser detector is also examined. The good behavior of the proposed approach is demonstrated by means of comparisons in term of bit error rate (BER) performance and implementation complexity with the classical Rake receiver and different multiuser receivers previously proposed in the literature on this subject.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126518891","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

Energy minimization approach for optimal cooperative spectrum sensing in sensor-aided cognitive radio networks 传感器辅助认知无线电网络中最优协同频谱感知的能量最小化方法

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8531

H. N. Pham, Yan Zhang, P. Engelstad, T. Skeie, F. Eliassen

{"title":"Energy minimization approach for optimal cooperative spectrum sensing in sensor-aided cognitive radio networks","authors":"H. N. Pham, Yan Zhang, P. Engelstad, T. Skeie, F. Eliassen","doi":"10.4108/ICST.WICON2010.8531","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8531","url":null,"abstract":"In a sensor-aided cognitive radio network, collaborating battery-powered sensors are deployed to aid the network in cooperative spectrum sensing. These sensors consume energy for spectrum sensing and therefore deplete their life-time, thus we study the key issue in minimizing the sensing energy consumed by such group of collaborating sensors. The IEEE P802.22 standard specifies spectrum sensing accuracy by the detection and false alarm probabilities, hence we address the energy minimization problem under this detection accuracy constraint. Firstly, we derive the bounds for the number of sensors to simultaneously guarantee the thresholds for high detection probability and low false alarm probability. With these bounds, we then formulate the optimization problem to find the optimal sensing interval and the optimal number of sensor that minimize the energy consumption. Thirdly, the approximated analytical solutions are derived to solve the optimization accurately and efficiently in polynomial time. Finally, numerical results show that the minimized energy is significantly lower than the energy consumed by a group of randomly selected sensors. The mean absolute error of the approximated optimal sensing interval compared with the exact value is less than 4% and 8% under good and bad SNR conditions, respectively. The approximated optimal number of sensors is shown to be very close to the exact number.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129097215","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: 62

A ferry scheme for geocast in MANETs 一种在机动网络中进行地球广播的轮渡方案

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8504

Ting Wang, C. Low

引用次数: 2

Performance of an adaptive PSO partial parallel interference canceller for CDMA communication systems CDMA通信系统中自适应PSO部分并行干扰消除器的性能

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8626

Chia-Hsin Cheng, Hsi-Chou Hsu, Yung-Fa Huang, J. Wen, Ling-Cheng Hsu

{"title":"Performance of an adaptive PSO partial parallel interference canceller for CDMA communication systems","authors":"Chia-Hsin Cheng, Hsi-Chou Hsu, Yung-Fa Huang, J. Wen, Ling-Cheng Hsu","doi":"10.4108/ICST.WICON2010.8626","DOIUrl":"https://doi.org/10.4108/ICST.WICON2010.8626","url":null,"abstract":"In this paper, we propose an adaptive particle swarm optimization (APSO) based partial parallel interference cancellation scheme for direct-sequence code-decision multiple access (CDMA) communication system over frequency selective fading channels. However, the partial cancellation tries to reduce the cancellation error in parallel interference cancellation schemes due to the wrong interference estimations in the early stages. Thus, in order to reduce the computational complexity and improve the performacne of the CDMA system, particle swarm optimization (PSO), which has the ability of solution to complex combinatorial optimization problem, is employed in searching the optimal weight for multiple access interference cancellation. Experiments have been carried out on the method can improved on the multiuser detection in CDMA system, the simulation results show that APSO detector can achieve the global optimization in fast convergence rate, and also show that the proposed detector is obviously superior to convenentional receiver and multiuser detectors based on some optimum algorithm in terms of the multiple access interfere and the mitigation of near-far effect.","PeriodicalId":111317,"journal":{"name":"2010 The 5th Annual ICST Wireless Internet Conference (WICON)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122803798","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: 7

Traffic load distribution in large-scale and dense wireless sensor networks 大规模密集无线传感器网络中的业务负载分布

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8507

Qinghua Wang, Tingting Zhang

引用次数: 5

Energy-efficient resource allocation in cooperative OFDMA systems 协同OFDMA系统中的节能资源配置

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8511

Tolga Girici, Fatma Sokmen

引用次数: 1

Broadcast video streaming in cellular networks: An adaptation framework for channel, video and AL-FEC rates allocation 蜂窝网络中的广播视频流:信道、视频和AL-FEC速率分配的自适应框架

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8457

D. Munaretto, D. Jurca, J. Widmer

引用次数: 26

Countermeasures against MAC address spoofing in public wireless networks using lightweight agents 利用轻量级代理对抗公共无线网络MAC地址欺骗的对策

2010 The 5th Annual ICST Wireless Internet Conference (WICON) Pub Date : 2010-03-01 DOI: 10.4108/ICST.WICON2010.8622

I-Hsuan Huang, Ko-Chen Chang, Yu-Chi Lu, Cheng-Zen Yang

引用次数: 4