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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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Power allocation and control for the downlink in cellular CDMA networks 蜂窝CDMA网络下行链路的功率分配与控制
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.2001.965456
L. Nuaymi, P. Godlewski, X. Lagrange
{"title":"Power allocation and control for the downlink in cellular CDMA networks","authors":"L. Nuaymi, P. Godlewski, X. Lagrange","doi":"10.1109/PIMRC.2001.965456","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965456","url":null,"abstract":"The issue of power control (PC) in the downlink of a cellular CDMA network is studied. Two approaches are discernible. The first uses the base-to-mobile-distance in order to allocate transmitted powers while the other is based on closed-loop control. The best achievable performance of a PC is evaluated for the downlink of a CDMA network. This paper then studies an almost optimal downlink power control. Numerical examples are presented in order to discuss the downlink PC performance.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"81 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":"123005595","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
Performance of multi-stage canceller for narrowband interference rejection in DS-CDMA system DS-CDMA系统窄带干扰抑制的多级消去器性能研究
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.2001.965423
T. Kitano, S. Hara, N. Morinaga
{"title":"Performance of multi-stage canceller for narrowband interference rejection in DS-CDMA system","authors":"T. Kitano, S. Hara, N. Morinaga","doi":"10.1109/PIMRC.2001.965423","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965423","url":null,"abstract":"In order to improve spectral efficiency, CDMA overlay, which means co-existence of wideband and narrowband signals in the same frequency band, has been considered. However, signals from existing narrowband system are not necessarily transmitted with low enough power level not to give damage to DS-CDMA (direct sequence code division multiple access) signals, so an efficient rejection technique for narrowband interferers is required for successful CDMA overlay. Furthermore, it is necessary to cope with sudden changes of interference power levels associated with their appearance/disappearance. In this paper, we propose a canceller to reject such high power narrowband interference for the DS-CDMA system and show the rejection performance obtained from the computer simulation.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"49 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":"123285505","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
Quality of service and power consumption in WCDMA cellular systems with SIR-based closed loop power control 基于sir闭环功率控制的WCDMA蜂窝系统的服务质量和功耗
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.2001.965485
V. Tralli, M. Zorzi
{"title":"Quality of service and power consumption in WCDMA cellular systems with SIR-based closed loop power control","authors":"V. Tralli, M. Zorzi","doi":"10.1109/PIMRC.2001.965485","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965485","url":null,"abstract":"In this work we investigate and discuss the behavior of a wideband CDMA cellular system from the point of view of the power efficiency and the quality level at the physical layer. More precisely, special attention is given to the role played by the SIR-based closed loop power control when it tries to compensate for channel loss variations in different conditions of fading velocity. It is shown that, for a heavily loaded system in a slow fading environment, the largest amount of power is required by those users experiencing the worst quality level. This aspect should be taken into account in the management of the system resources. The results have been obtained from a suitable simulation tool which joins the system level analysis with the link level analysis and includes many features of the WCDMA air interface of UMTS.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"2 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":"128658417","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
A channel allocation scheme for both uniform and non-uniform traffic environment in cellular networks 针对蜂窝网络中均匀和非均匀业务环境的信道分配方案
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.2001.965291
R. Vannithamby, E. Sousa
{"title":"A channel allocation scheme for both uniform and non-uniform traffic environment in cellular networks","authors":"R. Vannithamby, E. Sousa","doi":"10.1109/PIMRC.2001.965291","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965291","url":null,"abstract":"We propose a channel allocation scheme called unified channel allocation (UCA) appropriate for both uniform and non-uniform traffic environment. The currently available channel allocation schemes such as fixed, dynamic and hybrid schemes are not suitable for all traffic conditions. The fixed channel allocation scheme does not perform well in non-uniform traffic environment and the dynamic scheme does not do well in uniform heavy traffic conditions. In real situations, however, the user traffic pattern changes with time and space. The UCA scheme adaptively changes its channel recommendation pattern for each cell to satisfy the current demand under all traffic conditions. We demonstrate through simulation that the proposed scheme, using the virtual channel set (VCS), performs better than the other schemes in all traffic conditions. Furthermore, the UCA scheme is a practical scheme, because it can be implemented without knowledge of the traffic fluctuations with time and space, since the underlying VCSs will adapt to traffic fluctuations.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"94 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":"129166252","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
Sequence adaptation for interference reduction and capacity maximization in DS-CDMA systems DS-CDMA系统中干扰抑制和容量最大化的序列自适应
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.2001.965424
C. Sung, K. Leung
{"title":"Sequence adaptation for interference reduction and capacity maximization in DS-CDMA systems","authors":"C. Sung, K. Leung","doi":"10.1109/PIMRC.2001.965424","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965424","url":null,"abstract":"The relation between interference reduction and capacity maximization in DS-CDMA systems is investigated. We show that the solution which minimizes the total weighted squared correlation (TWSC) happens to maximize the sum capacity of the system. Furthermore, we show that a distributed sequence adaptation algorithm based on the MMSE receiver reduces TWSC and increases sum capacity simultaneously at each iteration step. Simulation results show that the algorithm converges to the optimal solution.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"71 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":"128703134","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
Simplified statistical replacement models for channel estimation in WCDMA 简化的WCDMA信道估计统计替换模型
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.2001.965488
R. Weber
{"title":"Simplified statistical replacement models for channel estimation in WCDMA","authors":"R. Weber","doi":"10.1109/PIMRC.2001.965488","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965488","url":null,"abstract":"This paper provides a statistical analysis of channel estimation errors and gives simplified replacement models that can be used to speed-up link- as well as system-level simulations. Although the investigations are carried out for downlink dedicated physical channels (DL-DPCH) of third-generation wideband CDMA (3G WCDMA), specified by 3GPP for IMT-2000/UMTS (UTRA), the main results are also suitable for the uplink. It turns out that in almost all cases well-known distribution functions for the channel estimation error amplitudes and phases can be used to model real channel estimation behavior efficiently. For low to medium speed vehicular environments without interference, the error amplitudes can be assumed to be Rician and the error phases are uniformly distributed. For low speed indoor environments, the resulting error phases can be neglected and error amplitudes are best represented by the Nakagami-m distribution. In general, the higher the velocity of the mobile and the interference of other channels get, the more error amplitudes follow a Suzuki distribution. The given models show to be applicable to replace computational intensive real channel estimation. They could also be used in radio network and radio protocol simulations, e.g. to quantify time-variant demodulator losses.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"56 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":"128606435","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
A wideband directional channel model for UMTS microcells 用于UMTS微蜂窝的宽带定向信道模型
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.2001.965444
M. G. Marques, L. Correia
{"title":"A wideband directional channel model for UMTS microcells","authors":"M. G. Marques, L. Correia","doi":"10.1109/PIMRC.2001.965444","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965444","url":null,"abstract":"The development of a planar wideband directional channel model applicable to UMTS microcells is addressed. The model, a statistical one based on geometrical considerations, is implemented and simulated, its assessment being based on global parameters of channel impulse responses obtained from measurement results. Exemplifying results for the directional channel impulse response are depicted for streets based on the city of Lisbon. For longer distances, system performance improvement is expected when using adaptive antennas.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"29 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":"117101702","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: 27
Mobile IP/sup 2/ 移动IP/sup 2/
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.2001.965397
W.C.-Y. Lee, D.J.Y. Lee
{"title":"Mobile IP/sup 2/","authors":"W.C.-Y. Lee, D.J.Y. Lee","doi":"10.1109/PIMRC.2001.965397","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965397","url":null,"abstract":"Internet traffic is growing at an exponential rate and the lives of more and more people are tightly coupled with the Internet. The ability to keep connected to the Internet while on the move is highly desired in an increasingly mobile environment. We present a means for ubiquitous network access for consumers in both wired and wireless environments. We introduce the concept of multiple-interface/multiple-connection to support high-speed handoff and seamless roaming between different networks (wired and wireless). This is implemented by improving the current Mobile IP concept, extending existing IP (specifically CMIP and ARP) functions and enhancing current PC device drivers and software. The mobility supported by this proposal is based on layer 3 functionality under the OSI protocol layer definition (physical layer and link layer are assumed to be supported already).","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"11 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":"121178451","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
The mobility management and authentication/authorization mechanisms in mobile networks beyond 3G 3G以上移动网络中的移动性管理和认证/授权机制
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.2001.965459
L. Dell'Uomo, E. Scarrone
{"title":"The mobility management and authentication/authorization mechanisms in mobile networks beyond 3G","authors":"L. Dell'Uomo, E. Scarrone","doi":"10.1109/PIMRC.2001.965459","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965459","url":null,"abstract":"The paper presents the initial results obtained from a theoretical study on mobility management with QoS and authentication, authorization and accounting (AAA) issues in an enhanced UMTS-WLAN environment that is the one of the IST European project WINE GLASS (Wireless Ip NEtwork as a Generic platform for Location Aware Service Support). The proposed solution for AAA and QoS mobility management issues aims to exploit the potential of IP-based wireless mobile multimedia networking evolving from 3G towards 4G systems. The main WINE GLASS objective is to exploit and enhance new IP-based techniques to support terminal mobility and soft-guaranteed QoS in a wireless Internet architecture. The proposed framework incorporates both UMTS and WLAN access technologies, enhancing the UMTS backbone in order to support fully an all-IP solution. Moreover, the project has the scope to explore the potential of access technologies in enabling location-aware and QoS-aware application services for wireless mobile users. A wireless Internet testbed is to be developed with the aim of integrating an IPv6 backbone and UTRAN and WLAN access to an IP-based 4G core network. This testbed will be a means to investigate, develop, test, integrate, validate and evaluate innovative techniques and applications.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"43 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":"115999956","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
Wireless IP network architecture for cdma2000 cdma2000无线IP网络架构
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.2001.965289
William C. Y. Lee, David J. Y. Lee
{"title":"Wireless IP network architecture for cdma2000","authors":"William C. Y. Lee, David J. Y. Lee","doi":"10.1109/PIMRC.2001.965289","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965289","url":null,"abstract":"In the industry trend toward third generation (3G) cellular systems, a great deal of emphasis has been placed on packet based transport, especially by adapting the Internet Protocol. At the same time, there is a trend across the communications industry to converge voice and data at the transport level. The interests of the major players are accelerating the development of new standards and availability of new products to support the benefits of convergence. It is now possible to employ existing VoIP technology solutions currently available to provide CDMA systems that are based on third generation system architectures. This paper discusses the migration from fundamentally circuit switched solutions for wireless voice toward packet switched, IP based solutions for the cdma2000 system.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"1 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":"124393073","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
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