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12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)最新文献

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Link-condition based proxies for QoS management in wireless networks 无线网络中基于链路条件的QoS管理代理
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965392
Z. Jiang, K. Leung
{"title":"Link-condition based proxies for QoS management in wireless networks","authors":"Z. Jiang, K. Leung","doi":"10.1109/PIMRC.2001.965392","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965392","url":null,"abstract":"In this paper, we analyze the performance of proxy functions for controlling the quality of service in wireless networks, where the proxy performs aggressive content reduction as a means to throttle traffic when the radio link is congested. The proxy may be located at different parts of the network, thus affecting the feedback delay from the base station to the proxy. A queueing model is constructed and solved to study the performance tradeoffs among system parameters and in particular, how the proxy performance is affected by the feedback control delay between base stations and the proxy. Using image compression as an example, we examine response time and fraction of compression as a function of the control delay. Our results reveal that the proxy function can effectively control response time in the case of link congestion, if the delay is reasonably small, e.g. when the proxy is located close to the radio link. We also find that to assess the effectiveness of the control mechanism, it is necessary to examine whether the proxy performs content reduction when and only when link congestion occurs. Towards this end, we study the system-state probabilities and the correlation between response time and compression.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125475146","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
Forward link packet scheduler for high-speed packet data system 高速分组数据系统的转发链路分组调度程序
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965287
A. Yamaguchi, Y. Takeuchi
{"title":"Forward link packet scheduler for high-speed packet data system","authors":"A. Yamaguchi, Y. Takeuchi","doi":"10.1109/PIMRC.2001.965287","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965287","url":null,"abstract":"This paper describes a forward link packet scheduler method for a high-speed packet data communication system. A proportional fairness method has been proposed to realize high data throughput. This paper proposes a modification to the proportional fairness method to add capabilities for adjustment of the difference of throughput among access terminals. In the proposal, the formula which computes the average transmission rate of the proportional fairness method is modified. The effect of the proposal is that it permits flexible adjustment of the unevenness of throughput per access terminal which originates in the position of an access terminal relation to an access point. The performance of the proposed method is analyzed from several aspects, namely, throughput per sector, distance characteristics of throughput per access terminal and transmission acquisition cycle by computer simulations. It has been proved in consequence that the proposed method has the expected effect.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124905980","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
The effect of feedback delay to the closed-loop transmit diversity in FDD WCDMA FDD WCDMA中反馈延迟对闭环发射分集的影响
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965486
Jyri Hämäläinen, R. Wichman
{"title":"The effect of feedback delay to the closed-loop transmit diversity in FDD WCDMA","authors":"Jyri Hämäläinen, R. Wichman","doi":"10.1109/PIMRC.2001.965486","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965486","url":null,"abstract":"Transmit diversity techniques provide attractive solutions for increasing downlink capacity in 3G systems within low-mobility environments. Open-loop and closed-loop transmit diversity modes with two transmit antennas have already been included in 3GPP WCDMA Release 4, and at the moment schemes exploiting a larger number of transmit antennas are being developed. This paper analyzes the performance of a simple closed-loop transmit diversity scheme suitable for 3GPP WCDMA. The goal is to study the effect of different feedback delays on the performance of the given closed-loop scheme. Although the analysis applies only in the case of the specific algorithm (phase-only feedback) it is expected that the performance of the more general magnitude and phase feedback shows similar properties. We use signal-to-noise ratio (SNR) gain as a performance measure, which corresponds to the gain in expected received SNR in a mobile terminal when feedback information from the receiver is applied in the transmitter.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124303203","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
Kalman tracking based on TDOA for UMTS mobile location 基于TDOA的UMTS移动定位卡尔曼跟踪
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965428
M. Nájar, J. Vidal
{"title":"Kalman tracking based on TDOA for UMTS mobile location","authors":"M. Nájar, J. Vidal","doi":"10.1109/PIMRC.2001.965428","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965428","url":null,"abstract":"A potentiality of the location problem in wireless networks that has not been explored enough is the mobility of the user equipment (UE). This paper deals with UMTS mobile location tracking using Kalman filtering based on TDOA (time difference of arrival) measurements. The performance of the proposed approach is compared with the CRB (Cramer Rao bound) for the static location estimator.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124485740","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: 45
Simultaneous code-time access control in a multicode-CDMA network 多码cdma网络中的同时码时访问控制
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965254
P. Kong, K. Chua, B. Bensaou
{"title":"Simultaneous code-time access control in a multicode-CDMA network","authors":"P. Kong, K. Chua, B. Bensaou","doi":"10.1109/PIMRC.2001.965254","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965254","url":null,"abstract":"Existing multicode-CDMA MAC protocols do only single dimensional access control either in the code or time domain, and thus result in a complex optimisation problem. In this paper, we propose a MAC protocol which can do simultaneous code-time access control to avoid the optimisation problem, and to achieve better system utilisation. In order to do that, the proposed protocol decouples the function of transmission ordering from the function of packing all the scheduled transmissions in the resource space. As such, different transmission scheduling algorithms can be adopted without altering the protocol. A water filling approach is used for efficient transmission packing where each of the scheduled transmissions is treated as a rectangular capsule with an arbitrary size and the resource space is viewed as a water container. Simulation results indicate that the proposed protocol can achieve higher throughput compared to single dimensional access control protocols. Therefore, the proposed MAC protocol is a more efficient one.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130360383","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
Space-time transmit diversity with multiple access interference suppression for downlink WCDMA systems 下行WCDMA系统的空时发射分集与多址干扰抑制
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965259
Gang Wu, Haifeng Wang, Shixin Cheng
{"title":"Space-time transmit diversity with multiple access interference suppression for downlink WCDMA systems","authors":"Gang Wu, Haifeng Wang, Shixin Cheng","doi":"10.1109/PIMRC.2001.965259","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965259","url":null,"abstract":"The effects of fading channels and multiple access interference limit the performance of downlink WCDMA systems. In this paper, a linear minimum mean-square error multiuser receiver with space-time transmit diversity is proposed for downlink WCDMA systems. The fading effect and multiple access interference can be jointly mitigated by the proposed scheme. The performance analysis under Gaussian approximation has also been carried out. Simulation results show that substantial performance gain can be achieved compared with conventional algorithms.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122202246","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
On the integration of MPEG-4 video streams with voice and e-mail data packet traffic over wireless picocellular networks 关于在无线皮蜂窝网络上整合 MPEG-4 视频流与语音和电子邮件数据包流量
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965321
P. Koutsakis, S. Psychis, M. Paterakis
{"title":"On the integration of MPEG-4 video streams with voice and e-mail data packet traffic over wireless picocellular networks","authors":"P. Koutsakis, S. Psychis, M. Paterakis","doi":"10.1109/PIMRC.2001.965321","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965321","url":null,"abstract":"A new medium access control (MAC) protocol for mobile wireless communications is presented and investigated. We explore, via an extensive simulation study, the performance of the protocol when integrating voice, MPEG-4 video and e-mail data packet traffic over a wireless channel of high capacity. Our scheme achieves high aggregate channel throughput in all cases of traffic load, while preserving the quality of service (QoS) requirements of each traffic type.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130797126","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
GAHA and GAPA: approaches for supporting link asymmetry in mobile ad hoc networks GAHA和GAPA:在移动自组织网络中支持链路不对称的方法
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965264
Dongkyun Kim, Hwanseok Jeong, C. Toh, Yanghee Choi
{"title":"GAHA and GAPA: approaches for supporting link asymmetry in mobile ad hoc networks","authors":"Dongkyun Kim, Hwanseok Jeong, C. Toh, Yanghee Choi","doi":"10.1109/PIMRC.2001.965264","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965264","url":null,"abstract":"Existing routing protocols for mobile ad hoc networks assume that all nodes have the same radio transmission range. In other words, the mobile ad hoc network has symmetric links, which means that two neighboring nodes A and B are within the transmission range of one another. However, since nodes consume battery power independently according to their computing and communication load, there exist asymmetric links, which means that node A is within node B's transmission range, but not vice versa. In this paper, two approaches are presented to support routing in the existence of asymmetric links: GAHA (GPS-based Hop-by-hop Acknowledgment) and GAPA (GPS-based Passive Acknowledgment) schemes. Both GAHA and GAPA can be applied to any routing protocols by utilizing GPS (Global Positioning System) location information. Simulation results reveal that both GAHA and GAPA protocols cope well in the presence of asymmetric wireless links and nodes' mobility.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"95 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132434716","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
Performance evaluation of the mean-square prefiltered delayed decision feedback sequence detector 均方预滤波延迟决策反馈序列检测器的性能评价
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965399
M. Magarini, A. Spalvieri, G. Tartara
{"title":"Performance evaluation of the mean-square prefiltered delayed decision feedback sequence detector","authors":"M. Magarini, A. Spalvieri, G. Tartara","doi":"10.1109/PIMRC.2001.965399","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965399","url":null,"abstract":"In signal equalization, a technique that allows reduction of the number of states of the Viterbi detector is the delayed decision feedback sequence detector (DDFSD). In order to achieve good performance, it is essential to operate, before the DDFSD, an appropriate prefiltering of the received sequence. This paper is devoted to performance evaluation of the DDFSD when the feedforward filter of a minimum mean square error decision feedback equalizer is adopted as a prefilter. A truncated version of the union bound is used to approximate the bit error rate. The analysis includes a method for determining the error events that dominate the bound.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132685736","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
A new soft-handoff management algorithm with two decision boundaries 一种新的双决策边界软切换管理算法
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965491
Farid Ashtiani, J. Salehi, M. Aref, M. Nasiri-Kenari
{"title":"A new soft-handoff management algorithm with two decision boundaries","authors":"Farid Ashtiani, J. Salehi, M. Aref, M. Nasiri-Kenari","doi":"10.1109/PIMRC.2001.965491","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965491","url":null,"abstract":"One of the most prominent features of code division multiple-access (CDMA) cellular networks is their ability for applying soft-handoff. This type of handoff results in a better support of seamless communication services, capacity enhancement, QoS improvement, etc. Because of the existence of more parameters and flexibilities compared to hard-handoff, an optimum solution for soft-handoff management and admission control for new and handoff calls is necessary. We propose a new algorithm with two thresholds for admission of new and handoff calls, and with two decision boundaries for controlling of handoff traffic. We compare this algorithm with a simpler one with only one decision boundary, by employing a general and flexible 3-dimensional framework with respect to important traffic parameters including loss probability, carried traffic, blocking and dropping probabilities, and show that our algorithm can result in less loss probability as well as less blocking and dropping probabilities with more control over traffic growth in the cell.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"295 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114848256","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
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