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2007 4th International Symposium on Wireless Communication Systems最新文献

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Lab and Research Activities at Wireless Trondheim 特隆赫姆无线实验室和研究活动
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392367
S. Andresen, J. Krogstie, Thomas Jelle
{"title":"Lab and Research Activities at Wireless Trondheim","authors":"S. Andresen, J. Krogstie, Thomas Jelle","doi":"10.1109/ISWCS.2007.4392367","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392367","url":null,"abstract":"This paper gives a short introduction to the layout and organisation of lab facilities in connection to wireless Trondheim. Current research activities and future possibilities are described.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121650525","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: 39
On Improving Perceived User Throughput in Heterogeneous HSPA, GERAN and WLAN Scenarios 提高异构HSPA、GERAN和WLAN场景下感知用户吞吐量的研究
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392431
R. Ljung, O. Sallent, J. Pérez-Romero
{"title":"On Improving Perceived User Throughput in Heterogeneous HSPA, GERAN and WLAN Scenarios","authors":"R. Ljung, O. Sallent, J. Pérez-Romero","doi":"10.1109/ISWCS.2007.4392431","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392431","url":null,"abstract":"This paper considers a heterogeneous radio access network scenario where different radio access technologies (RATs) are jointly managed. Different RAT selection algorithms are evaluated for both downlink and uplink transmissions, where the basic strategies of the algorithms are based on operator QoS policies. The total perceived system throughput gain from common radio resource management (CRRM) compared to a manual RAT selection scenario is analysed using three different examples of algorithms based on operator's policies for RAT selection.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"12 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121663282","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
A Distributed Probability Collectives Optimization Method for Multicast in CDMA Wireless Data Networks CDMA无线数据网络组播的分布概率群优化方法
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392414
M. H. Amerimehr, B. Khalaj
{"title":"A Distributed Probability Collectives Optimization Method for Multicast in CDMA Wireless Data Networks","authors":"M. H. Amerimehr, B. Khalaj","doi":"10.1109/ISWCS.2007.4392414","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392414","url":null,"abstract":"Recently, the problem of resource allocation for achieving optimal multicast throughput has become of high interest. In this paper, we consider scenarios in which the utility function is an arbitrary, rather than concave function of multicast rate and specifically apply the proposed algorithm to the multicast problem in CDMA wireless networks. By using a combination of probability collectives (PC) method and network coding, a new cross-layer optimization approach which converges to a sub-optimal solution is proposed. This solution has been achieved by decomposing the original problem into data routing sub-problems at the network layer and power allocation sub-problems at the physical layer. These sub-problems are then coupled through a set of Lagrangian multipliers and each sub- problem is solved in a distributed fashion. It will also be shown that if the utility function is concave or monotonic, the proposed approach converges to a near optimal solution.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122729218","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
The Potential for Location-Based Services with Wi-Fi RFID Tags in Citywide Wireless Networks 城市无线网络中基于位置的Wi-Fi RFID标签服务的潜力
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392319
Henrik Ljogodt Moen, Thomas Jelle
{"title":"The Potential for Location-Based Services with Wi-Fi RFID Tags in Citywide Wireless Networks","authors":"Henrik Ljogodt Moen, Thomas Jelle","doi":"10.1109/ISWCS.2007.4392319","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392319","url":null,"abstract":"Active radio frequency identification (RFID) tags that comply with IEEE 802.11 standards are currently used within indoor real-time location systems (RTLS) in several niche markets. With the rapid deployment of citywide wireless networks, outdoor location-based services (LBS) have become an important research area. Such services are believed to have a considerable business potential in citywide wireless networks. Wi- Fi RFID tags can be used to take advantage of such a potential. However, very limited testing has been carried out in order to examine the performance of the Wi-Fi RFID technology in outdoor environments. In this paper, the authors present results from the testing of Wi-Fi RFID tags within the citywide wireless network deployment Wireless Trondheim (Tradlose Trondheim). The location-based solution used in the deployment has explicitly no support for determining location in outdoor environments. Still, it is important to survey the current performance of the Wi-Fi RFID technology in order to identify the potential for commercial services. The results presented in this paper indicate several limitations with this technology in citywide wireless networks. These limitations constrain the current possibilities for commercial services based on Wi-Fi RFID tags in Wireless Trondheim.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121827291","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: 17
Blind Adaptive Constrained Reduced-Rank Estimation Algorithms for Constant Modulus Signals Applied to CDMA Interference Suppression 恒模信号盲自适应约束降阶估计算法在CDMA干扰抑制中的应用
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392444
R. D. Lamare, M. Haardt, R. Neto
{"title":"Blind Adaptive Constrained Reduced-Rank Estimation Algorithms for Constant Modulus Signals Applied to CDMA Interference Suppression","authors":"R. D. Lamare, M. Haardt, R. Neto","doi":"10.1109/ISWCS.2007.4392444","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392444","url":null,"abstract":"This work proposes a multistage decomposition for blind adaptive parameter estimation in the Krylov subspace with the code-constrained constant modulus (CCM) design criterion. Based on constrained optimization of the constant modulus cost function and utilizing the Lanczos algorithm and Arnoldi-like iterations, a multistage decomposition is developed for blind parameter estimation. A family of computationally efficient blind adaptive reduced-rank stochastic gradient (SG) and recursive least squares (RLS) type algorithms is also devised and evaluated against existing methods. Simulation results consider the application of the proposed techniques to the suppression of multi-access and intersymbol interference in DS-CDMA systems.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131851877","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
Wireless Vehicular Adaptive Radio Resource Management Policies in Congested Channels 拥塞信道中无线车载自适应无线电资源管理策略
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392366
M. Sepulcre, J. Gozálvez
{"title":"Wireless Vehicular Adaptive Radio Resource Management Policies in Congested Channels","authors":"M. Sepulcre, J. Gozálvez","doi":"10.1109/ISWCS.2007.4392366","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392366","url":null,"abstract":"The strict QoS traffic safety requirements and the potential widespread adoption of wireless vehicular communication systems require the design and optimization of radio resource management policies that efficiently use the communications channel. To this end, this work proposes an adaptive radio resource management mechanism designed considering the operating conditions and the traffic safety requirements. The proposed scheme is analysed under various traffic densities, and compensation mechanisms to overcome the channel congestion effects are proposed and evaluated.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130493720","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
QoS-CROMA: An On-demand Time-Slotted MAC Protocol with QoS support for Wireless Ad Hoc Networks QoS- croma:为无线自组织网络提供QoS支持的按需时隙MAC协议
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392432
F. Rango, Annalisa Perrotta, S. Marano
{"title":"QoS-CROMA: An On-demand Time-Slotted MAC Protocol with QoS support for Wireless Ad Hoc Networks","authors":"F. Rango, Annalisa Perrotta, S. Marano","doi":"10.1109/ISWCS.2007.4392432","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392432","url":null,"abstract":"This paper presents a new MAC protocol with QoS support for wireless ad-hoc networks. This protocol called QoS- CROMA is an extension of an interesting TDMA MAC protocol that makes use of a receiver-driven on-demand time-slot assignment policy. Our QoS extension concerns the receiver-side scheduling, sender-side slot selection policy and the protocol packet format modification. A real-time scheduler for CPU task is adapted for the slot scheduling in our TDMA MAC context and some modifications to the slot selection policy of CROMA are carried out. Simulation results, considered in terms of data packet delay, throughput and control overhead, have been evaluated. QoS-CROMA is more performing than original CROMA in terms of lower data packet delay and higher throughput.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116476460","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
Comparisons of ZigBee Personal Area Network (PAN) Interconnection Methods ZigBee个人区域网络(PAN)互连方法的比较
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392357
Sewook Jung, A. Chang, M. Gerla
{"title":"Comparisons of ZigBee Personal Area Network (PAN) Interconnection Methods","authors":"Sewook Jung, A. Chang, M. Gerla","doi":"10.1109/ISWCS.2007.4392357","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392357","url":null,"abstract":"ZigBee's low power consumption, built-in security method and ratified specifications make it very suitable to be used with medical sensor devices. Medical sensors in a human body self organize in a ZigBee Personal Area Network (PAN). At a higher level, these PANs are interconnected in a Healthnet. To this end, a ZigBee PAN detects the existence of another PAN with beacon detection or active channel scan and selects proper target based on the peak energy (when energy detection channel scan is used). Different ZigBee interconnection schemes are then possible. PAN bridge method uses special bridge node that works for different PANs with time division method. PAN merge method changes PAN coordinator's role as bridge node and merges two PANs. Peer-to-peer network can be used when all PANs use the same channel and operates as an ad-hoc network. In this paper, we perform extensive evaluations using NS-2 simulations to compare PAN interconnection methods. Results show that the PAN bridge is the most useful method because it is not affected by router/node ratio and is applicable to different channel and user scenarios.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133500547","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
A MIMO Mobile-to-Mobile Channel Model Derived from a Geometric Street Scattering Model 基于几何街道散射模型的MIMO移动到移动信道模型
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392449
A. Chelli, M. Pätzold
{"title":"A MIMO Mobile-to-Mobile Channel Model Derived from a Geometric Street Scattering Model","authors":"A. Chelli, M. Pätzold","doi":"10.1109/ISWCS.2007.4392449","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392449","url":null,"abstract":"In this paper, a frequency-nonselective multi-input multi-output (MIMO) channel model for mobile-to-mobile (M2M) communications is presented. This channel model is derived from a new geometric street scattering model. The street model consists of an infinite number of scatterers lying on the left and/or right hand side of the street. It is assumed that both the transmitter and the receiver are moving. The channel model takes into account the exact relationship between the angle of arrival (AOA) and the angle of departure (AOD). Based on this relationship, the statistical properties of the reference model are studied. Analytical solutions are provided for the three-dimensional (3D) space-time cross-correlation function (CCF), the 2D space CCF, and the temporal autocorrelation function (ACF). Starting from the reference model, where the number of scatterers is infinite, a deterministic simulation model is developed. The latter can easily be implemented on a computer, allowing the emulation of the statistical fading behaviour with a great deal of precision. Finally, simulation results show the excellent correspondence between the temporal and spatial correlation properties of the channel simulator and the reference model.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130229718","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: 36
Assessment of Coexistence Performance for WiMAX Broadband in HAP Cellular System and Multiple-Operator Terrestrial Deployments 联合蜂窝系统和多运营商地面部署中WiMAX宽带共存性能的评估
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392329
Zhe Yang, A. Mohammed, T. Hult, D. Grace
{"title":"Assessment of Coexistence Performance for WiMAX Broadband in HAP Cellular System and Multiple-Operator Terrestrial Deployments","authors":"Zhe Yang, A. Mohammed, T. Hult, D. Grace","doi":"10.1109/ISWCS.2007.4392329","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392329","url":null,"abstract":"In this paper, performance of providing WiMAX from high altitude platforms (HAPs) with multiple antenna payload will be investigated as well as considering the coexistence capability with multiple-operator terrestrial deployments. A scenario of a HAP and terrestrial WiMAX base stations deployed inside a HAP coverage area with a radius at 30 km will be proposed. HAP cellular formation with different reuse patterns will be established. Coexistence performance will be assessed in terms of HAP downlink signal interfered by terrestrial WiMAX deployment. This paper will show it is effective to deliver WiMAX via HAPs and can efficiently share the spectrum with terrestrial WiMAX systems.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114946987","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
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