发布求助
文献互助 智能选刊 最新文献

Proceedings of GLOBECOM '95最新文献

筛选
英文 中文
Coded 64-CAP ADSL in an impulse-noise environment-simulation results 编码64-CAP ADSL在脉冲噪声环境下的仿真结果
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.500345
W. Henkel, H. Chung
{"title":"Coded 64-CAP ADSL in an impulse-noise environment-simulation results","authors":"W. Henkel, H. Chung","doi":"10.1109/GLOCOM.1995.500345","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.500345","url":null,"abstract":"This paper describes performance results of E1-ADSL (2.048 Mb/s asymmetrical digital subscriber line) transmission based on carrierless amplitude/phase modulation (CAP) in an impulse-noise environment. Various coding schemes for error protection are investigated. Code options are Reed Solomon code with interleaving, array code and trellis coding, or interleaved trellis coding. The simulation results are based on real measured impulses from an impulse-noise measurement campaign carried out by German Telekom. The inter-arrival times between impulses were either assumed to be constant (worst-case scenario) or were delivered from a distinctive stochastic generator with an inter-arrival time density according to a model also derived in the German campaign. It was found that the RS codes, even with a quite small error-correcting capability, achieved acceptable error performance. Array codes can also be a low-complexity alternative. Trellis coding alone, as expected, was not very effective against the impulse noise.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116023852","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
A generic software platform for local ATM networking 本地ATM联网的通用软件平台
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502750
H. Lalgudi, Xiaoqiang Chen, V. Kumar
{"title":"A generic software platform for local ATM networking","authors":"H. Lalgudi, Xiaoqiang Chen, V. Kumar","doi":"10.1109/GLOCOM.1995.502750","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502750","url":null,"abstract":"We define the requirements of a generic software platform for signaling and network management in a local ATM network. Based on these requirements, we compare some implementations, namely, VINCE, Q.port and XUNET, and conclude that none of these implementations provide a complete separation of the switching hardware and the signalling software. We select VINCE as our platform, since it is highly modular in design, scalable in architecture, compliant with the standards, and allows interworking of IP traffic. To separate the call processing from the switching hardware, we modify the VINCE implementation and define a switch controller-switch manager (SCSM) architecture, which makes it portable across different switching hardware platforms. This allows flexible configuration of call processing, facilitates easy upgrading of the call processing hardware, and service integration. Our implementation of SCSM in a local ATM network indicates that the SCSM partitioning overhead is negligible. We discuss efficient SCSM implementation issues such as event handling, OS, layer management, buffer management, and integration of network management with signaling.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116049846","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
Reduction of call drop-outs during handoffs using efficient signal strength prediction algorithms for personal communication systems 在个人通信系统中使用有效的信号强度预测算法减少切换期间的呼叫中断
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502813
G. Senarath, D. Everitt
{"title":"Reduction of call drop-outs during handoffs using efficient signal strength prediction algorithms for personal communication systems","authors":"G. Senarath, D. Everitt","doi":"10.1109/GLOCOM.1995.502813","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502813","url":null,"abstract":"In cellular mobile networks, the handoff decision is usually taken based on the past signal and interference level measurements taken at regular time intervals. Quality degradation can be minimized if a mobile can always be handed over to the base station which would provide highest quality during the next measurement cycle. For this purpose, a good prediction algorithm is needed to predict the condition of the signals received from various base stations during the next measurement cycle. One of the major objectives of this paper is to discuss whether a considerable quality improvement can be obtained using prediction. A lower-bound for the drop-out performance is obtained using a hypothetical scheme which assumes the best possible prediction. The performance of several prediction algorithms are considered under various shadowing conditions. It is found that the performance of prediction schemes greatly depends on the speed of the mobile and the shadowing correlation environment.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116404627","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
ATM switching node system technology for effective maintainability ATM交换节点系统技术的有效可维护性
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502703
N. Miyaho, A. Itoh, K. Koyama
{"title":"ATM switching node system technology for effective maintainability","authors":"N. Miyaho, A. Itoh, K. Koyama","doi":"10.1109/GLOCOM.1995.502703","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502703","url":null,"abstract":"Asynchronous transfer mode (ATM) technology has been widely studied and will be used to implement the B-ISDN. Although ATM switching nodes are being deployed, much work is still needed to resolve problems with their maintainability. This paper discusses the current research and experience concerning the development of ATM nodes from the viewpoint of maintainability and clarifies the concepts of hardware maintainability by introducing efficient connection test methods using an OAM cell-handling mechanism, an ATM traffic-monitoring mechanism with QoS control, and a test cell generation/checking mechanism for in-service connection testing. To increase maintainability, hardware failure detection/indication methods, a layered management scheme upon detection of a line failure, and automatic line switching to a stand-by system are proposed.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123447464","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
Controllability and impact of the cell loss process in ATM networks ATM网络中小区丢失过程的可控性及其影响
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502538
N. Bjorkman, A. Latour-Henner, U. Hansson, A. Miah
{"title":"Controllability and impact of the cell loss process in ATM networks","authors":"N. Bjorkman, A. Latour-Henner, U. Hansson, A. Miah","doi":"10.1109/GLOCOM.1995.502538","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502538","url":null,"abstract":"Cell loss measurements have been carried out for a conceivable ATM network scenario employing three types of ATM cross connects. By measurement, and compared to theory, adequate performance levels were readily obtained in terms of e.g. long-term CLR (cell loss ratio). The long-term CLR does not however provide enough information about the temporal distribution of the cell loss process. In view of this fact we conclude that short-term CLR for a cell loss burst better signifies the deterioration of a service. In these measurements the short-term CLR was high, 4 to 10%, and with a constant average level regardless of network load level. The acceptable cell loss level is determined only by how users perceive the quality of service. By both objective analysis and subjective assessment the relationship between network performance and quality of service is investigated for a high quality video/audio codec implementation.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123642010","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: 5
Scalable HDTV coding with motion-compensated subband and transform coding 可扩展的HDTV编码与运动补偿子带和转换编码
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.501973
Liangchi Hsu, K. Rao
{"title":"Scalable HDTV coding with motion-compensated subband and transform coding","authors":"Liangchi Hsu, K. Rao","doi":"10.1109/GLOCOM.1995.501973","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.501973","url":null,"abstract":"We propose a scalable multiresolution coding scheme for HDTV using hybrid motion compensated subband and transform coding. The scheme exploits advantages of discrete wavelet transforms, hierarchical multiresolution motion compensation, and transform coding. Three resolutions for applications of HDTV, conventional TV, and videophone, are aimed. Optimal bit allocation is performed for each resolution, where the constrained bitrate is required. An MPEG-like coding method with the DCT or lapped orthorgonal transform (LOT) is applied to the lowest subband. A motion-compensated PCM scheme and an efficient but low complexity VWL coding are applied to the medium and full resolutions. The performance of DCT and LOT in these applications is compared. Simulation results show that very good subjective and objective quality can be achieved for all the three resolutions.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121958544","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
Decoupling packet access protocols for wireless networks with capture and errors 具有捕获和错误的无线网络数据包访问解耦协议
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502649
F. Babich, E. Carli
{"title":"Decoupling packet access protocols for wireless networks with capture and errors","authors":"F. Babich, E. Carli","doi":"10.1109/GLOCOM.1995.502649","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502649","url":null,"abstract":"Reservation random access (RRA) protocols have been proposed for handling speech and data traffic on packet wireless networks. Among them, collision resolution based RRA protocols decouple the speech access procedure from the data access procedure. It is well known that capture improves the performance of random access algorithms. However, due to the decoupling and the limited delay requirements, capture could have negative effects on the performance. It has been shown that reservation protocols do not operate correctly in the presence of co-channel interference. Centralised management techniques, based on retransmissions, represent a suitable method for handling channel errors in microcellular radio networks, characterised by a negligible propagation delay. We present analytical results of performance evaluations for decoupling RRA protocols in a wireless network with capture and errors. The model we use allows one to evaluate the performance of RRA protocols with re-transmissions.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122086404","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
Performance evaluation of rate-based congestion control algorithms in multimedia ATM networks 多媒体ATM网络中基于速率的拥塞控制算法的性能评价
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502601
H. Ohsaki, M. Murata, H. Suzuki, C. Ikeda, H. Miyahara
{"title":"Performance evaluation of rate-based congestion control algorithms in multimedia ATM networks","authors":"H. Ohsaki, M. Murata, H. Suzuki, C. Ikeda, H. Miyahara","doi":"10.1109/GLOCOM.1995.502601","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502601","url":null,"abstract":"Rate-based congestion control promises effective traffic management for the ABR service class suitable for data communications in ATM networks. There have been proposed several rate-based congestion control schemes in the ATM Forum, including Enhanced Proportional Rate Control Algorithm (EPRCA) and EPRCA++ methods. While many studies have been devoted for these schemes in the past, only ABR traffic is taken into account; the effect of VBR and CBR service classes, in which multimedia traffic are accommodated, are not considered. We evaluate the performance of rate-based congestion control schemes when not only ABR traffic but also VBR traffic is incorporated into the ATM network. Through simulation experiments, we show the drawbacks of current rate-based congestion control proposals for multimedia traffic, and give several suggestions to overcome those problems.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124687907","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
A cell scheduling algorithm for VBR traffic in an ATM multiplexer ATM多路复用器中VBR通信量的单元调度算法
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502005
Chiung-Shien Wu, G. Ma, B.-S.P. Lin
{"title":"A cell scheduling algorithm for VBR traffic in an ATM multiplexer","authors":"Chiung-Shien Wu, G. Ma, B.-S.P. Lin","doi":"10.1109/GLOCOM.1995.502005","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502005","url":null,"abstract":"An efficient cell scheduling algorithm is proposed for multiplexing traffic sources with variable bit rate requirement in an ATM multiplexer. Three types of traffic sources an assumed in the multiplexer, namely the constant bit rate (CBR), variable bit rate (VBR), and best-effort traffic. For VBR and CBR sources, a statistical bandwidth requirement should be claimed before they are multiplexed in the ATM outgoing link. The proposed algorithm dynamically schedules the traffic and preserves the claimed throughput in the outgoing link for each CBR or VBR source. When there is no cell arrival at the VBR or CBR sources, the proposed algorithm assigns the bandwidth to the best-effort sources. The performance of the proposed algorithm is evaluated via simulation. The result shows that the proposed method has better performance over other static multiplexing schemes such as the weighted round-robin method.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124863382","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: 15
A software platform for service operation systems 业务操作系统的软件平台
Proceedings of GLOBECOM '95 Pub Date : 1995-11-14 DOI: 10.1109/GLOCOM.1995.502751
N. Makinae, H. Suzuki, K. Suda
{"title":"A software platform for service operation systems","authors":"N. Makinae, H. Suzuki, K. Suda","doi":"10.1109/GLOCOM.1995.502751","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502751","url":null,"abstract":"A services operations system has been implemented on an OLTP (online transaction processing) platform. This system is based on evolving TMN (telecommunications management network) standards and is designed to manage the various services provided for advanced intelligent networks.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128592600","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
首页 上一页 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：604180095
Book学术官方微信