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Development of traffic control mechanisms for IEEE 802.11 wireless LANs without QoS support functionality 开发不支持QoS功能的IEEE 802.11无线局域网的流量控制机制
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-12-01 DOI: 10.1109/ISWCS.2004.1407274
T. Hiraguri, Y. Inoue, S. Kubota
{"title":"Development of traffic control mechanisms for IEEE 802.11 wireless LANs without QoS support functionality","authors":"T. Hiraguri, Y. Inoue, S. Kubota","doi":"10.1109/ISWCS.2004.1407274","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407274","url":null,"abstract":"This paper proposes a traffic control scheme to support real-time traffic over the IEEE 802.11 wireless LAN systems that do not have QoS support functionality. The main features of the proposed scheme are bandwidth control for each flow and load balancing between access points by using information of data link, network and transport layers. The proposed scheme was implemented on a Linux machine which is called traffic controller. The traffic controller connects a high capacity backbone network and an access network and the access points of wireless LAN are attached to the access network. We evaluated the performance of the proposed traffic controller and confirmed that the communication quality of real-time traffic would be greatly improved by using this technique.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131234908","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
M&M's: an MPLS micro-mobility solution M&M's: MPLS微移动解决方案
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407264
K. Sethom, H. Afifi, W. Ben-Ameur
{"title":"M&M's: an MPLS micro-mobility solution","authors":"K. Sethom, H. Afifi, W. Ben-Ameur","doi":"10.1109/ISWCS.2004.1407264","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407264","url":null,"abstract":"Wireless communication brings fundamental changes to data networking and telecommunications, and makes the necessity of integrated networks a reality. Originally, the TCP/IP protocol suite was not designed to support mobile nodes. Typically, each host is assigned a unique address that also provides routing information to this host assuming its location is fixed. Therefore, the IP protocol should be augmented with a mobility management mechanism for delivering datagrams to their destination hosts independent of their locations. As a significant number of Internet service provider and network operator are migrating towards MPLS, MPLS seems to be a promising solution for next mobile generation networks. In fact, MPLS combines the speed and performance of layer 2 with the scalability and IP intelligence of layer 3. In this paper, an integration framework for 4G network using MPLS as the underlying technology is developed. M&M's will provide an excellent way of designing high performance QoS guaranteed networks.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115619389","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: 4
Application of a perceptual speech quality metric for link adaptation in wireless systems 感知语音质量度量在无线系统链路自适应中的应用
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407249
B. Rohani, Hans-Jürgen Zepernick, B. Rohani
{"title":"Application of a perceptual speech quality metric for link adaptation in wireless systems","authors":"B. Rohani, Hans-Jürgen Zepernick, B. Rohani","doi":"10.1109/ISWCS.2004.1407249","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407249","url":null,"abstract":"In this paper, the use of a new, real-time, perceptual speech quality metric for link adaptation in wireless systems, in general, and power control of global system for mobile communications (GSM), in particular, is investigated. It is shown that, due to better quality estimation of the new perceptual quality metric, efficiency of the link adaptation techniques is improved, thus saving precious system resources. In the example of GSM, for a given speech quality, the use of our perceptual speech quality metric in power control results in significant transmitter power savings (in excess of 2.5 dB) for moderate to high vehicular speeds as compared to when GSM's conventional link quality metric is used.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116762916","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
Blind estimation of diffused multipath vector channels for DS-CDMA systems DS-CDMA系统中扩散多径矢量信道的盲估计
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407205
T. Naveendra, A. Manikas
{"title":"Blind estimation of diffused multipath vector channels for DS-CDMA systems","authors":"T. Naveendra, A. Manikas","doi":"10.1109/ISWCS.2004.1407205","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407205","url":null,"abstract":"In the antenna array wideband DS-CDMA systems, the propagation medium is a vector channel. Moreover the multipaths that define the channel are spatially and temporally diffused such that each multipath appears as a cluster rather than a point like signal source. Hence, channel estimation techniques that do not exploit the structure of the vector channel become inefficient. In this context, a subspace approach to estimate the diffused vector channels for multi-user wideband DS-CDMA systems is being proposed. The diffused vector channel is parameterized in terms of multipath directions and times of arrival. Then, by employing the structure of the developed diffused vector channel, a powerful blind near-far resistant channel estimation algorithm is derived. Simulation results are provided to illustrate the efficiency of the algorithm.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117183759","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: 4
Fairness based antenna scheduling for multiuser MIMO systems 基于公平性的多用户MIMO系统天线调度
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407226
A. Pandharipande, Hojin Kim
{"title":"Fairness based antenna scheduling for multiuser MIMO systems","authors":"A. Pandharipande, Hojin Kim","doi":"10.1109/ISWCS.2004.1407226","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407226","url":null,"abstract":"We are concerned with the scheduling of base station (BS) transmitter antennas to mobile users in a communication downlink. We define a scheduling-priority criterion based on which the BS schedules transmissions to users. Two transmission schemes are considered. One in which, in a given time slot, the BS schedules all the transmit antennas to a single user determined to have greatest priority. Secondly, the BS transmit antennas are scheduled independently to the highest priority users as determined by each antenna scheduler individually. Finally, we evaluate the system capacity achieved under the two schemes with zero-forcing equalizers employed at the user receiver.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123539497","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
Receiver based stable and minimum queueing policy for TCP in cdma2000-1x cdma2000-1x中基于接收机的稳定最小排队策略
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407263
JaeGyu Jung, Banghun Chun, Youngjoo Kim, C. Yoo
{"title":"Receiver based stable and minimum queueing policy for TCP in cdma2000-1x","authors":"JaeGyu Jung, Banghun Chun, Youngjoo Kim, C. Yoo","doi":"10.1109/ISWCS.2004.1407263","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407263","url":null,"abstract":"There have been many researches to improve the performance of TCP operating in wireless link. A lot of prior work in this direction, however, has focused on avoiding the case of a TCP sender misinterpreting packet losses in the wireless link as congestion signals. In cdma2000, however, a reliable RLP ensures that packets are delivered in order and help to recover form packets received in error. In this paper, we have measured the performance of transport layer protocols on a nationally deployed commercial cdma2000-1x network. We used a cellular phone itself to measure the performance through modifications of Qualcomm TCP/UDP stack. We mainly focus on the large delay variation and excessive queueing in cdma2000-1x. And it is evitable for traditional TCP to accumulate segment at the buffer of bottleneck link, because TCP's congestion control algorithm would fill the entire router buffer before incurring packet loss. The primary goal of our work is to analyze the exact characteristics of cdma2000-1x, and maintains the queue length at bottleneck link can be stable without changing the TCP sender.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121546868","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
Aggregate resource reservation with predictive estimation in integrated scalable terrestrial-satellite network 基于预测估计的综合可扩展地星网络资源预留
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407252
F. Rango, M. Tropea, S. Marano
{"title":"Aggregate resource reservation with predictive estimation in integrated scalable terrestrial-satellite network","authors":"F. Rango, M. Tropea, S. Marano","doi":"10.1109/ISWCS.2004.1407252","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407252","url":null,"abstract":"In this paper we study the recent aggregated RSVP (ARSVP) protocol and in particular the introduction of this new protocol on integrated scalable terrestrial and IntServ satellite network. We focus on a novel proposed DiffServ like architecture called scalable core (SCORE) used in the terrestrial reference network in order to offer more scalability for large dimensions network. The integration between this terrestrial segment with a satellite geostationary platform is outlined. A new aggregate dynamic advance reservation has been proposed in order to give more effectiveness to ARSVP protocol. Different simulations are lead out in order to study the performance of the overall system evaluated in terms of signalling overhead and resource utilization. The study shows that the dynamic advance reservation can improve the terrestrial utilization reducing the control overhead in comparison aggregate static reservation.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128161661","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
Influence of smart antenna systems on the performance of radio resource scheduling in CDMA cellular systems 智能天线系统对CDMA蜂窝系统无线电资源调度性能的影响
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407273
M. Elmusrati, H. Koivo
{"title":"Influence of smart antenna systems on the performance of radio resource scheduling in CDMA cellular systems","authors":"M. Elmusrati, H. Koivo","doi":"10.1109/ISWCS.2004.1407273","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407273","url":null,"abstract":"The influence of adaptive antenna systems on the radio resource scheduling in cellular communication systems is studied and analyzed. The multi-objective distributed power and rate control algorithm is used as radio resource scheduler (RRS). The minimum variance distortionless response algorithm is used for the antenna's weights adaptation. The joining procedure between the RRS and the adaptive antenna is explained. Chip level simulations have been performed to evaluate our algorithms. In this paper we show that using smart antenna (in multi-path environment) can fairly increase the performance of the RRS.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130479127","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
A novel distributed cluster maintenance technique for high mobility ad-hoc networks 一种新的高移动性ad-hoc网络分布式集群维护技术
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407242
G. Venkataraman, S. Emmanuel, S. Thambipillai
{"title":"A novel distributed cluster maintenance technique for high mobility ad-hoc networks","authors":"G. Venkataraman, S. Emmanuel, S. Thambipillai","doi":"10.1109/ISWCS.2004.1407242","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407242","url":null,"abstract":"The dynamic nature of the mobile nodes in mobile ad-hoc networks (MANET), causes the mobile nodes to join and leave the clusters, thereby perturbing the membership of the clusters. Therefore cluster maintenance schemes are required to handle new admissions and releases of nodes in the clusters. Maintaining clusters in a distributed manner is more preferred in ad-hoc networks since it does not result in single point bottleneck failure. In a resource-limited network such as MANET (especially with nodes of varied capability), it is worthwhile to control the number of nodes per cluster for good planning and management of resources (such as memory, link bandwidth, battery power etc) in the cluster. In this paper, we propose a distributed cluster maintenance strategy that limits the number of nodes inside a cluster. However, we elect a cluster head for communication across the clusters. Our algorithm yields low number of clusters when compared to other algorithms taken for study. It is also observed that the number of cluster head changes is less and the life time of the cluster head is more. This behaviour of the cluster head is favourable to the high mobility environments because frequent updation of cluster head information and frequent re-election of cluster head may not be necessary.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131834236","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: 8
Iterative block-DFE techniques for single-carrier-based broadband communications with transmit/receive space diversity 具有发射/接收空间分集的单载波宽带通信的迭代块dfe技术
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407267
R. Dinis, A. Gusmão, N. Esteves
{"title":"Iterative block-DFE techniques for single-carrier-based broadband communications with transmit/receive space diversity","authors":"R. Dinis, A. Gusmão, N. Esteves","doi":"10.1109/ISWCS.2004.1407267","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407267","url":null,"abstract":"Conventional SC (single-carrier) modulations have been shown to be suitable for block transmission schemes with cyclic prefix. When selected for broadband wireless communication systems, they allow better performances than the corresponding OFDM-based (orthogonal frequency division multiplexing) block transmission schemes, while also offering a low complexity of implementation. In this paper, we propose an extension of the recently developed IB-DFE concept (iterative block decision feedback equalization), for SC-based block transmission, so that it can be adopted within transmit/receive space diversity implementations. The particular case where only one iteration is employed corresponds to a conventional, linear FDE scheme (frequency domain equalization); the subsequent iterations with the IB-DFE scheme are shown to provide increasingly improved performances.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128400783","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: 21
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