发布求助
文献互助 智能选刊 最新文献

2004 Symposium on Wireless Telecommunications最新文献

筛选
英文 中文
Decentralized access point selection architecture for wireless LANs 无线局域网的分散接入点选择体系结构
2004 Symposium on Wireless Telecommunications Pub Date : 2007-09-01 DOI: 10.1093/ietcom/e90-b.9.2513
Y. Fukuda, Y. Oie
{"title":"Decentralized access point selection architecture for wireless LANs","authors":"Y. Fukuda, Y. Oie","doi":"10.1093/ietcom/e90-b.9.2513","DOIUrl":"https://doi.org/10.1093/ietcom/e90-b.9.2513","url":null,"abstract":"Wireless LANs have been widely deployed, and multiple access points (APs) are likely to become much more available for wireless stations (STAs) which can roam from one AP to another by some rule. We focus on an efficient and fair way to use the wireless access resources provided by multiple APs. In particular, our major concern is to develop a decentralized way to enable each STA to select an appropriate available AP independently. A straightforward way is to select the AP with the strongest signal; however, this is shown to need further improvement. Hence, we propose decentralized AP selection strategies to achieve an efficient and fair share of wireless access resources, and evaluate them by simulations. The results show that the proposed strategies can attain an excellent throughput performance by use of the number of active STAs sharing each AP, even if STAs employ the strategies only when entering the wireless LAN. In addition, if STAs roam from one AP to another, the total throughput and fairness can be further improved very much.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124612352","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: 85
Joint carrier frequency acquisition and channel estimation algorithms for OFDM systems OFDM系统的联合载波频率采集和信道估计算法
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319584
Jun Li, Yan Du, Wei Zhang, Yongsheng Zhang
{"title":"Joint carrier frequency acquisition and channel estimation algorithms for OFDM systems","authors":"Jun Li, Yan Du, Wei Zhang, Yongsheng Zhang","doi":"10.1109/WTS.2004.1319584","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319584","url":null,"abstract":"We present new carrier frequency acquisition and channel estimation algorithms for OFDM systems. Both new algorithms utilize only one training frame to carry out carrier frequency acquisition and channel estimation at the same time. The simulation results show that both algorithms are immune from timing error with a high precision and low computational complexity.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"21 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120984993","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
QoS management in service specific label switched wireless networks 特定业务标签交换无线网络中的QoS管理
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319563
P. Maruthi, G. Sridhar, V. Sridhar
{"title":"QoS management in service specific label switched wireless networks","authors":"P. Maruthi, G. Sridhar, V. Sridhar","doi":"10.1109/WTS.2004.1319563","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319563","url":null,"abstract":"We consider a campus environment connected using multiple WLANs and WLAN routers providing interconnection between the WLAN networks. The servers part of WLANs in a campus network provide various services to users across the network. We have extended our earlier work related to service- and session-specific labeling, path, and switching. The extension is to support service-specific QoS and this is achieved by identifying an SSP (service-specific path) tree (a collection of SSPs) rooted at the WLAN router connected to the server hosting the service. Further, the service QoS parameters are distributed across the SSP tree for network resource reservation purposes. This reserved SSP tree is used to set up bidirectional QoS supported session-specific paths.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125558272","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
Impact of inactivity timer on energy consumption in WCDMA and cdma2000 非活动定时器对WCDMA和cdma2000系统能耗的影响
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319545
Chi-Chen Lee, Jul-Hung Yeh, Jyh-cheng Chen
{"title":"Impact of inactivity timer on energy consumption in WCDMA and cdma2000","authors":"Chi-Chen Lee, Jul-Hung Yeh, Jyh-cheng Chen","doi":"10.1109/WTS.2004.1319545","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319545","url":null,"abstract":"The paper provides the comparison between WCDMA and cdma2000 of the impact of an inactivity timer on the energy consumption of a mobile station. Both simulation and analysis are utilized to investigate the impact of the inactivity timer and the performance comparison between WCDMA and cdma2000. The novel and practical models proposed analyze and quantify the energy consumption in the case of bursty and streaming traffic. The analytic models are verified extensively by simulation.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115986824","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: 68
A dependence between average call duration and voice transmission quality: measurement and applications 平均通话时长与语音传输质量的关系:测量与应用
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319562
J. Holub, J. Beerends, R. Smid
{"title":"A dependence between average call duration and voice transmission quality: measurement and applications","authors":"J. Holub, J. Beerends, R. Smid","doi":"10.1109/WTS.2004.1319562","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319562","url":null,"abstract":"The paper deals with the estimation of the relation between speech transmission quality and average call duration for a given network and portfolio of customers. It uses non-intrusive speech quality measurements on live speech calls. The basic idea behind this analysis is an expectation that the average call duration is higher for calls of a good quality since users are less disturbed during their conversation by transmission impairments. Both traditional and state of the art methods for non-intrusive speech transmission quality measurements and also for call duration monitoring are briefly described and two basic dependency analysis methods are shown. The relations for result uncertainty estimation are derived. A numerical example is given based on a limited training database that is constructed on the basis of real network data. Finally, potential applications are presented and discussed The first results indicate that, in the low to medium quality range (mean opinion scores between 1 and 3), the call duration increases with increasing speech quality.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114827580","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: 19
ML-based estimator for integer frequency offset estimation of OFDM systems 基于ml的OFDM系统整数频偏估计方法
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319548
Chen Chen, Jiandong Li, Linjing Zhao, Jun Niu
{"title":"ML-based estimator for integer frequency offset estimation of OFDM systems","authors":"Chen Chen, Jiandong Li, Linjing Zhao, Jun Niu","doi":"10.1109/WTS.2004.1319548","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319548","url":null,"abstract":"A novel estimator for integer frequency offset estimation of OFDM systems is derived, which is based on the maximum likelihood (ML) technique and exploits the differential information between two consecutive blocks of OFDM data symbols in the frequency domain. The reason why the ML estimator has better performance than the conventional method is analyzed. How to select the differential sequence is also studied. By computer simulations, the performance of the ML estimator is compared with that of the conventional method for the additive white Gaussian noise (AWGN) channel and the multipath fading channel. The simulation results are in good agreement with the analytical study.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122747727","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
Middleware for multimedia mobile collaborative system 多媒体移动协同系统中间件
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319570
Xiaoyong Su, B. Prabhu, C. Chu, R. Gadh
{"title":"Middleware for multimedia mobile collaborative system","authors":"Xiaoyong Su, B. Prabhu, C. Chu, R. Gadh","doi":"10.1109/WTS.2004.1319570","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319570","url":null,"abstract":"Although various collaborative systems have successfully improved enterprise work efficiency, mobile collaborative systems, which allow collaboration via wireless networks and mobile devices, still lack robust functionality and content representation support. The paper proposes a novel mobile collaboration framework for multimedia content generation, representation and delivery. A unified file format and a message queue management middleware, designed for, and employed in, a heterogeneous computing environment, are also discussed.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132249727","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
A handoff scheme with probability-based channel borrowing in integrated wireless mobile networks 综合无线移动网络中基于概率信道借用的切换方案
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319568
Wei Li, Hang-Li Chen, D. Agrawal
{"title":"A handoff scheme with probability-based channel borrowing in integrated wireless mobile networks","authors":"Wei Li, Hang-Li Chen, D. Agrawal","doi":"10.1109/WTS.2004.1319568","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319568","url":null,"abstract":"We propose and analyze a handoff scheme with channel borrowing in integrated wireless mobile networks. Channels in each cell are divided into two parts and pre-allocated to real-time and non-real-time services. Each type of service is allowed to borrow channels from the other under certain conditions. A non-real-time service call can borrow an unused channel assigned to real-time service but it can be preempted by a real-time service call. A real-time service call borrows a channel from non-real-time service with a certain probability which depends on the number of available idle non-real-time service channels. We model the system by a six-dimensional Markov chain and compute the system performance in terms of blocking probability of originating calls, forced termination probability of real-time service calls, and average transmission delay of non-real-time service calls. The proposed scheme maximizes the resource utilization and keeps a certain quality of service (QoS) for each service at the time of congestion.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131064693","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 model for evaluating multi-route routing in ad hoc networks ad hoc网络中多路由路由评估模型
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319581
Z. Taha, Xian Liu
{"title":"A model for evaluating multi-route routing in ad hoc networks","authors":"Z. Taha, Xian Liu","doi":"10.1109/WTS.2004.1319581","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319581","url":null,"abstract":"An ad hoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any centralized administration. In the absence of a centralized administration node, routing is a challenging issue. We focus on a particular source initiated on-demand protocol, called dynamic source routing (DSR), and show how use of multipath techniques can reduce the frequency of route discovery. The frequency of route discovery in DSR is one of the main performance metrics in mobile ad hoc networks. This performance metric was studied using an exponential model, which might be an appropriate model for voice traffic, but is not a suitable model for data traffic. Studies have shown that data traffic is more precisely characterized by heavy-tailed distributions. We present an approach to characterize data traffic through the compound log-normal distribution. Reliability archetypes of series and parallel connections have been used in developing these models.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133334273","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
Impact of mobility on the performance of mobile ad hoc networks 移动性对移动自组织网络性能的影响
2004 Symposium on Wireless Telecommunications Pub Date : 2004-05-14 DOI: 10.1109/WTS.2004.1319582
Xiaolong Li, D. Agrawal, Qing-An Zeng
{"title":"Impact of mobility on the performance of mobile ad hoc networks","authors":"Xiaolong Li, D. Agrawal, Qing-An Zeng","doi":"10.1109/WTS.2004.1319582","DOIUrl":"https://doi.org/10.1109/WTS.2004.1319582","url":null,"abstract":"In ad hoc networks, the mobility of nodes affects the system performance. Considerable attention has been paid to mobility models. However, most work is confined to simulation. A novel method is proposed to analyze the performance of mobile ad hoc networks (MANETs) considering the node's mobility. In the proposed method, of each communicating pair, one is considered to be stationary while the second is moving with a velocity relative to the first one. Using this method, system performance parameters, such as the average radio range dwell time of mobile nodes, link holding time, link breaking probability, and throughput of CSMA/CA protocols, are obtained by a theoretical framework. The results obtained from the proposed analytical model are observed to match well with simulation results.","PeriodicalId":242981,"journal":{"name":"2004 Symposium on Wireless Telecommunications","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131610047","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信