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2009 4th International Symposium on Wireless Pervasive Computing最新文献

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Throughput Maximization with Multiuser Non-selfish Cognitive Relaying in CR Networks CR网络中多用户非自私认知中继的吞吐量最大化
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800611
Peng Gong, Jae Hyun Park, J. Yoo, Bo-Sun Yu, D. Kim
{"title":"Throughput Maximization with Multiuser Non-selfish Cognitive Relaying in CR Networks","authors":"Peng Gong, Jae Hyun Park, J. Yoo, Bo-Sun Yu, D. Kim","doi":"10.1109/ISWPC.2009.4800611","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800611","url":null,"abstract":"With coexistence of primary and Cognitive Radio (CR) networks, the benefits of Non-selfish Symbiotic Cognitive Relaying (NSSCR) were illustrated in previous work by considering single cognitive radio user (CRU) cooperation. However, with cooperation from multiple CRUs instead of a single CRU, additional degree of diversity gain as well as power gain can be achieved. Thus, in this paper a Multiuser Non-Selfish Symbiotic Cognitive Relaying (MNSCR) is further proposed for the coexistence of primary and CR networks. In a symbiotic architecture, the PU (PU) with weak channel quality will initiate a full duplex amplify-and-forward (AF) cooperative transmission from multiple CRUs. As a reward, the PU would like to give an incentive time for CR data transmission. Instead of utilizing incentive time duration immediately by selfish CRUs who participated in the cooperation, the non-selfish CRUs might selflessly give incentive time duration to a CRU with a better channel quality. Simulation results shows that with proposed MNSCR the capacity of CR network can be further improved.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126612799","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
Speaker Recognition using Speaker-independent Universal Acoustic Model and Synchronous Sensing for Business Microscope 基于说话人独立通用声学模型和商业显微镜同步传感的说话人识别
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800609
J. Nishimura, T. Kuroda
{"title":"Speaker Recognition using Speaker-independent Universal Acoustic Model and Synchronous Sensing for Business Microscope","authors":"J. Nishimura, T. Kuroda","doi":"10.1109/ISWPC.2009.4800609","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800609","url":null,"abstract":"\"Business Microscope\" visualizes interactions among knowledge workers in organization by sensing their face-to-face communication using sensornet. To analyze the workers communication in detail, speaker recognition for each node is needed. In the conventional studies, specific speaker-dependent training samples and acoustic model are required to recognize each speaker. In this work, speaker recognition using speaker-independent universal acoustic model is proposed. This method utilizes synchronous sensing of sensornet to extract the cepstral difference in acoustic channel and allows all speakers in the system to use same single acoustic model. The universal acoustic model constructed from 41 channel filterbank MFCC and large-sized LBG codebook achieved speaker recognition accuracy of 97.32% on test inputs of 0.2s for four speakers. With the synchronization error (≪ 120ms) among sensor nodes, the drop in recognition accuracy of less than 2 pts is observed.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130251602","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
Closed-Form Outage Probability Analysis of a Diamond Relay Network with Opportunistic Spectrum Access 具有机会频谱接入的菱形中继网络的闭式中断概率分析
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800573
N. A. Surobhi, M. Faulkner
{"title":"Closed-Form Outage Probability Analysis of a Diamond Relay Network with Opportunistic Spectrum Access","authors":"N. A. Surobhi, M. Faulkner","doi":"10.1109/ISWPC.2009.4800573","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800573","url":null,"abstract":"Opportunistic spectrum access (widely known as cognitive radio) enables the use of unoccupied licensed radio spectrum and thus assures efficient use of the spectrum. In this paper, we investigate the outage probability of a wireless amplify-and-forward cooperative two relay (diamond relay) network which consists of a source, a destination and two network clusters. Each cluster is defined by a number of cognitive nodes (unlicensed) and a primary node (licensed). The cognitive nodes relay the source information by employing opportunistic spectrum access using either repetition-based or best relay selection (i.e. selection cooperation) relaying protocol. Closed-form expressions of outage probability are obtained for non-identical independent Rayleigh fading channels. Selection cooperation exhibits lower outage probability than that of the repetition-based relaying protocol. However, the unavailability of the spectrum causes much increase in the outage probability of Selection cooperation. An improvement of the performance can be provided if the neighbouring nodes of the cognitive node within a cluster sense the spectrum cooperatively. The analytical outage probability expressions have been validated through the simulations.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134554697","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
Multi-Dimensional Beamforming for Adaptive MIMO Systems 自适应MIMO系统的多维波束形成
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800596
M. Gheryani, Zhiyuan Wu, Y. Shayan
{"title":"Multi-Dimensional Beamforming for Adaptive MIMO Systems","authors":"M. Gheryani, Zhiyuan Wu, Y. Shayan","doi":"10.1109/ISWPC.2009.4800596","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800596","url":null,"abstract":"A novel scheme called multi-dimensional beamforming is proposed for adaptive MIMO systems, which can achieve higher capacity than eigen-beamforming when more feedback bandwidth is available. Theoretical analysis and numerical results show that multi-dimensional beamforming improves capacity as compared to eigen-beamforming at relatively high signal-to-noise ratio. By extension of the existing beamforming scheme to multi-dimension, we are able to concatenate the scheme with space-time codes. Simulation results are also provided to evaluate the concatenated schemes with linear space-time codes at various data rates in terms of bit error rate.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132454721","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
Enabling Service Continuity on Future Mobile Services 实现未来流动服务的连续性
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800583
N. Bashah, I. Jørstad
{"title":"Enabling Service Continuity on Future Mobile Services","authors":"N. Bashah, I. Jørstad","doi":"10.1109/ISWPC.2009.4800583","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800583","url":null,"abstract":"To be able to access services in a seamless way across different physical access networks is compelling. The seamless handover features and availability of the mobile voice telephony service is by far the most important key to success in current mobile telecommunication services. As mobile devices are becoming multi-modal, i.e., supporting several physical network access technologies, there has been much focus on enabling network handover between these access technologies. Unfortunately, seamless handover is not sufficient to ensure service continuity because in many cases, due to mobility not only the connection link must be changed but also the components realizing a service. In this paper extensions to the 802.21 MIHF to provide adequate assistance to the dynamic composition of a service is proposed and described thoroughly.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133114595","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: 6
A Novel Network Selection Algorithm of Service-Based Dynamic Weight Setting 一种基于服务的动态权值设置网络选择算法
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800556
Hongyan Cui, Lifeng Zhu, Shi Yang, Jian Li
{"title":"A Novel Network Selection Algorithm of Service-Based Dynamic Weight Setting","authors":"Hongyan Cui, Lifeng Zhu, Shi Yang, Jian Li","doi":"10.1109/ISWPC.2009.4800556","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800556","url":null,"abstract":"In the future mobile systems, various wireless access technologies will exist simultaneously and constitute a complicated heterogeneous networks environment. Considering the users' services satisfaction, a novel network selection algorithm based on dynamic weight setting is proposed in order to solve the existing problems that there is not a tradeoff between users' preferences and network conditions, and without only considers single handoff parameter in the present handoff decision schemes, a possibility-based uncertainly Multi-Attribute Decision Making (UMADM) method is used for handoff cost function. The network selections adopt Always most Suitable Connection (ASC) principle in order to utilize the wireless sources efficiently. Simulation results show that the proposed algorithm is favorable to improve the whole QoS performance of services, and enhance the cost-effective of the selected networks.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123963969","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: 13
Performance of SIR-Based Power Control in a WCDMA Enhanced Uplink System with the Hybrid ARQ Technique 基于混合ARQ技术的WCDMA增强型上行系统中基于sir的功率控制性能
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800600
Messaoud Eljamai, M. Ammar, Mohamed Ettolba, S. Saoudi
{"title":"Performance of SIR-Based Power Control in a WCDMA Enhanced Uplink System with the Hybrid ARQ Technique","authors":"Messaoud Eljamai, M. Ammar, Mohamed Ettolba, S. Saoudi","doi":"10.1109/ISWPC.2009.4800600","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800600","url":null,"abstract":"The power control and the Hybrid Automatic Repeat Request (HARQ) are important techniques in Wideband Code Division Multiple Access (WCDMA) systems. The joint use of these two mechanisms can enable wireless systems to increase throughput and spectral efficiency. In this paper, we will evaluate the performance of the SIR-based power control in a WCDMA Enhanced Uplink system with a turbo coded HARQ technique over multi-path fading channel. We propose, also, an improved Signal-to-Interference power Ratio (SIR) estimation scheme. In the proposed scheme, the SIR is estimated by using the Enhanced Dedicated Physical Data Channel (E-DPDCH) instead of using the Dedicated Physical Control Channel (DPCCH).","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132405870","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
Performance Evaluation of a Cognitive Radio Network with Exponential and Truncated Usage Models 基于指数和截断使用模型的认知无线网络性能评估
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800597
Waqas Ahmed, Jason H. Gao, M. Faulkner
{"title":"Performance Evaluation of a Cognitive Radio Network with Exponential and Truncated Usage Models","authors":"Waqas Ahmed, Jason H. Gao, M. Faulkner","doi":"10.1109/ISWPC.2009.4800597","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800597","url":null,"abstract":"In this paper, we study the forced termination probability, blocking probability and throughput of secondary users with practical usage models, which include fixed, truncated exponential, truncated lognormal, truncated Pareto distributions. Moreover, we compare the results of these usage models with the well known exponential distribution model. We consider two system scenarios with/without spectrum handoff. For all distributions, introduction of spectrum handoff provides significant gains in forced termination probability and throughput. We found that the behaviour of all the truncated distributions is similar to exponential distribution. The results show that among all the distributions models, the secondary user connections with fixed length has the largest aggregate throughput, whereas the truncated Pareto has the smallest aggregate throughput. In general, as the mean duration of secondary user connections decreases, the throughput increases.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132989275","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: 26
Large Multimedia Artifacts Prebuffering in Mobile Information Systems as Location Context Awareness 移动信息系统中作为位置上下文感知的大型多媒体工件预缓冲
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800591
O. Krejcar
{"title":"Large Multimedia Artifacts Prebuffering in Mobile Information Systems as Location Context Awareness","authors":"O. Krejcar","doi":"10.1109/ISWPC.2009.4800591","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800591","url":null,"abstract":"The proliferation of mobile computing devices and local-area wireless networks has fostered a growing interest in location-aware systems and services. We consider location as prime form of context information. The developed framework joins the concepts of location and user tracking as an extension for a new type of mobile information systems. The framework uses a WiFi network infrastructure to let a mobile device determine its indoor position. User location is used for data prebuffering and pushing information from server to user's PDA. All server data are saved as artifacts (together) with its position information in building. The accessing of prebuffered data on mobile device can highly improve response time needed to view large multimedia data.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122546587","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: 12
An Efficient Algorithm for Context-Aware End-to-End Connectivity Management 上下文感知端到端连接管理的一种有效算法
2009 4th International Symposium on Wireless Pervasive Computing Pub Date : 2009-02-11 DOI: 10.1109/ISWPC.2009.4800563
Jaydip Sen, A. Ukil
{"title":"An Efficient Algorithm for Context-Aware End-to-End Connectivity Management","authors":"Jaydip Sen, A. Ukil","doi":"10.1109/ISWPC.2009.4800563","DOIUrl":"https://doi.org/10.1109/ISWPC.2009.4800563","url":null,"abstract":"In a dynamic, heterogeneous environment, context-aware adaptation is a key concept to meet the varying requirements of different users. Connectivity is an important context source that can be utilized for optimal management of diverse networking resources. Application Quality of Service (QoS) is another important issue. This paper presents connectivity from the point of view of context awareness, identifies various relevant raw connectivity contexts, and discusses how high-level context information can be abstracted from the raw context information. Further, rich context information is utilized in various policy representation with respect to user profile and preference, application characteristics, device capability, and network QoS conditions. Finally, a context-aware end-to-end evaluation algorithm is presented that takes into account the application QoS .in a multi-access wireless network. Simulation results show its efficiency and effectiveness.","PeriodicalId":383593,"journal":{"name":"2009 4th International Symposium on Wireless Pervasive Computing","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122468136","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
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