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2008 11th IEEE Singapore International Conference on Communication Systems最新文献

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Modeling and performance evaluation for the sleep mode in the IEEE 802.16e wireless networks IEEE 802.16e无线网络中睡眠模式的建模与性能评估
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737361
Z. Huo, Wuyi Yue, Shunfu Jin, N. Tian
{"title":"Modeling and performance evaluation for the sleep mode in the IEEE 802.16e wireless networks","authors":"Z. Huo, Wuyi Yue, Shunfu Jin, N. Tian","doi":"10.1109/ICCS.2008.4737361","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737361","url":null,"abstract":"IEEE 802.16e is the latest broadband wireless access standard designed to support mobility. In mobile networks, how to control energy consumption is one of the most important issues for the battery-powered mobile stations. The standard proposes an energy saving mechanism named ¿sleep mode¿ for conserving the power of the mobile stations. According to the operating mechanism of the sleep mode for downlink traffic in the type I power saving class, a discrete-time Geom/G/1 queueing model with a close-down time and multiple vacations is built in this paper. By employing an embedded Markov chain method, the average queue length and the average sojourn time of the system model are derived. Correspondingly, we get the performance measures of the energy saving rate and the average packet delay time for the sleep mode in the IEEE 802.16e. Finally, numerical results are given to demonstrate the dependency relationships between the system performance measures and the system parameters. Furthermore, a cost model is developed to determine the optimum length of the close-down time.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130547209","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
QoS scheduling for group mobility in WiMAX WiMAX中群体移动性的QoS调度
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737464
G. A. Prasath, C. Fu, M. Ma
{"title":"QoS scheduling for group mobility in WiMAX","authors":"G. A. Prasath, C. Fu, M. Ma","doi":"10.1109/ICCS.2008.4737464","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737464","url":null,"abstract":"In this paper we have proposed an adaptive scheduling algorithm to suit group mobility scenarios in the mobile WiMAX. The QoS scheduling scheme aims to minimize the end-to-end delay for real-time traffic. IEEE 802.16e is a wireless broadband network standard aimed at providing robust, high data rate mobile communication. The issue of group mobility in mobile WiMAX networks has not been explored so far. With a modified IEEE 802.16e standard, it becomes possible to provide robust group mobility in battle zone or emergency operations that require centralized control. The WiMAX PHY and MAC specifications can be utilized to establish a point to multipoint (PMP) mobile network topology with QoS. However, as the mobile nodes move away from the base station, they are provided with lesser bandwidth due to the inherent MCS in the MAC layer. It might starve the bandwidth of real-time traffic and cause packet dropping. In this paper we trade-off performance of non-real-time flow to minimize end-to-end delay for real-time traffic when necessary while using the excess bandwidth available to provide fair service to non-real time traffic.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114202684","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
Waveform design for MIMO radar using Kronecker structured matrix estimation 基于Kronecker结构矩阵估计的MIMO雷达波形设计
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737220
Yi-Xin Yang, Zishu He, W. Xia
{"title":"Waveform design for MIMO radar using Kronecker structured matrix estimation","authors":"Yi-Xin Yang, Zishu He, W. Xia","doi":"10.1109/ICCS.2008.4737220","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737220","url":null,"abstract":"The multiple-input multiple-output (MIMO) radar system is a new kind of radar technology. It can choose flexibly the probing signals transmitted via its antennas or increase the inter-element distance to reduce the cross-correlation of the signals, so that the spatial diversity gain can be obtained. Waveform design is one of the important topics of the MIMO radar. We discuss here the waveform design method for extended radar targets using Kronecker structured matrix estimation. Simulation results are provided to validate the proposed solutions.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121659025","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
Impact of topology control on capacity of wireless ad hoc networks 拓扑控制对无线自组网容量的影响
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737252
Q. Guan, Shengming Jiang, Q. Ding, G. Wei
{"title":"Impact of topology control on capacity of wireless ad hoc networks","authors":"Q. Guan, Shengming Jiang, Q. Ding, G. Wei","doi":"10.1109/ICCS.2008.4737252","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737252","url":null,"abstract":"Capacity based topology management is essential for a wireless ad hoc network due to its limited capacity so that topology control becomes indispensable to deploy large wireless ad hoc networks. This paper discusses the impact of topology control on network capacity by introducing a new definition of the expected capacity that is first analyzed in the perspective of cross layer optimization. Based on the analytical result, optimal schemes for neighbor selection and transmission power control, which are two functions of topology control, are studied to maximize the capacity. An optimistic conclusion indicates that topology control with stable node degree renders the capacity not to decrease with the increase of the number of nodes present in the network. The analytical results in this paper can provide a guideline for the design of topology control schemes.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":" 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113949162","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: 44
Comparison of decoding turbo Gallager codes in hybrid decoding arrangements with different iterative decoders over the erasure channel 在擦除信道上不同迭代解码器混合译码方式下turbo Gallager码的译码比较
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737183
Li Yang, M. Ambroze, M. Tomlinson
{"title":"Comparison of decoding turbo Gallager codes in hybrid decoding arrangements with different iterative decoders over the erasure channel","authors":"Li Yang, M. Ambroze, M. Tomlinson","doi":"10.1109/ICCS.2008.4737183","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737183","url":null,"abstract":"In this paper, different iterative decoders for turbo Gallager codes are optimised and compared for the binary erasure channel. The complexity and performance differences between turbo decoder, BCJR-based Look-Up Table decoder and belief propagation decoder are analysed and evaluated. A hybrid decoding arrangement, which uses an iterative decoder followed by a maximum likelihood ¿In-Place¿ matrix inversion algorithm, is compared for the different iterative decoders. Results are presented which show that the BCJR-based iterative decoders achieve better performance than using the belief propagation decoder for turbo Gallager codes in the erasure channel. When small encoder memory is selected, the optimised Look-Up Table decoder provides a good balance between convergence performance and complexity.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"26 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125680514","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
Intelligent allocation of network bandwidth: A comparison of two generalized particle models 网络带宽的智能分配:两种广义粒子模型的比较
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737188
Xiang Feng, F. Lau, D. Shuai
{"title":"Intelligent allocation of network bandwidth: A comparison of two generalized particle models","authors":"Xiang Feng, F. Lau, D. Shuai","doi":"10.1109/ICCS.2008.4737188","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737188","url":null,"abstract":"There are two types of generalized particle models (GPM) that can be used to allocate network bandwidth efficiently. One is the ¿original¿ generalized particle models (OGPM) with which the allocation is not changed until the price reaches equilibrium. The other one is the economic generalized particle model (EGPM), where the allocation is changed dynamically even when the allocation is being calculated. EGPM therefore suits bandwidth allocation in dynamic environments. The two models can be classified as evolutionary intelligent swarm optimization approaches. The EGPM is an important extension and further development of the OGPM, which comprises two major components: (1) dynamic allocation of network bandwidth based on GPM; and (2) dynamic modulation of price and demands of network bandwidth. The two components combined can be readily implemented by a distributed algorithm. In this paper, by simulations, we compare EGPM and OGPM, and then with the ant colony optimization approach, the utility function algorithm, and the max-min fairness algorithm.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121716667","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
Fabrication of a two-dimensional photonic crystals using reactive ion etching 用反应离子蚀刻制备二维光子晶体
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737379
Jingtao Zhou, Huajun Shen, Huihui Zhang, Xinyu Liu
{"title":"Fabrication of a two-dimensional photonic crystals using reactive ion etching","authors":"Jingtao Zhou, Huajun Shen, Huihui Zhang, Xinyu Liu","doi":"10.1109/ICCS.2008.4737379","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737379","url":null,"abstract":"A triangular lattice photonic crystals with lattice constant 500 nm and the diameter 300 nm of air pores in the silicon-on-insulator (SOI) substrate have been designed, fabricated and realized. The processes of the fabrication of the two-dimensional photonic crystals based on SOI, including masking, electron-beam lithography, and reactive ion etching are introduced.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115938538","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
Concatenated prime codes and quadratic prime codes 串联素数码和二次素数码
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737180
Liu Qingge, Y. Dongkai, Zhang Qishan
{"title":"Concatenated prime codes and quadratic prime codes","authors":"Liu Qingge, Y. Dongkai, Zhang Qishan","doi":"10.1109/ICCS.2008.4737180","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737180","url":null,"abstract":"From both construct formula view and finite field model view, the relationship between concatenated prime codes and quadratic prime codes has been studied in this paper. As a result, two new methods of constructing frequency hopping (FH) sequences are derived, designated as exchange and time shift, which are still generalized and combined. Finally, one application of the novel methods to the general quadratic prime codes is presented and more new families of FH sequences are generated with properties unchanged.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124109560","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 reconfigurable high-speed RNS-FIR channel filter for multi-standard software radio receivers 用于多标准软件无线电接收机的可重构高速RNS-FIR信道滤波器
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737404
K. G. Smitha, A. P. Vinod
{"title":"A reconfigurable high-speed RNS-FIR channel filter for multi-standard software radio receivers","authors":"K. G. Smitha, A. P. Vinod","doi":"10.1109/ICCS.2008.4737404","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737404","url":null,"abstract":"This paper presents a reconfigurable, high-speed channel filter architecture for multistandard software defined radio (SDR) receivers using residue number systems (RNS). The channel filters in the channelizer of an SDR extract multiple narrowband channels corresponding to different communication standards from the wideband input signal. These filters must operate at the highest speed in the digital front-end as it is placed immediately after the ADC. For a given moduli set, our architecture can be reconfigured for multiple standards with varying number of taps. The proposed architecture has been synthesized on TSMC 0.18 ¿m CMOS standard cell technology. Synthesis result shows that the proposed reconfigurable FIR channel filter offers speed improvement of 72.6% at the cost of 12% increase in area compared to existing method. The area-time complexity of our architecture is 68.9% less than that of the existing method.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115038091","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: 10
A GPU approach to FDTD for radio coverage prediction 基于GPU的FDTD无线电覆盖预测方法
2008 11th IEEE Singapore International Conference on Communication Systems Pub Date : 2008-11-01 DOI: 10.1109/ICCS.2008.4737450
A. Valcarce, G. de la Roche, Jie Zhang
{"title":"A GPU approach to FDTD for radio coverage prediction","authors":"A. Valcarce, G. de la Roche, Jie Zhang","doi":"10.1109/ICCS.2008.4737450","DOIUrl":"https://doi.org/10.1109/ICCS.2008.4737450","url":null,"abstract":"The benefits of using Finite-Difference alike methods for coverage prediction comprise highly accurate electromagnetic simulations that serve as a reliable input for wireless networks planning and optimization algorithms. These algorithms usually require several thousands of iterations in order to find the optimal network configuration, so to obtain results within reasonable computation times, the applied propagation models must be as fast as possible. In this study an implementation-oriented analysis on the suitability of using Graphics Processing Units (GPU) to perform Finite-Difference Time-Domain simulations is carried out. We believe that the recently released Compute Unified Device Architecture (CUDA) technology has opened the door for computational intensive algorithms such as FDTD to be considered for the first time as a precise and fast propagation model to predict radio coverage.","PeriodicalId":208126,"journal":{"name":"2008 11th IEEE Singapore International Conference on Communication Systems","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117152860","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: 38
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