VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)最新文献_第3页

On the performance of the dynamic packet reservation multiple access scheme in the presence of fading 衰落情况下动态分组保留多址方案的性能研究

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686414

Z. Haas, D. A. Dyson

{"title":"On the performance of the dynamic packet reservation multiple access scheme in the presence of fading","authors":"Z. Haas, D. A. Dyson","doi":"10.1109/VETEC.1998.686414","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686414","url":null,"abstract":"The dynamic packet reservation multiple access (DPRMA) protocol is designed for integration of multimedia traffic over a wireless link. A primary feature of DPRMA is the centralized controller, a base station in a cellular system, whose responsibility is to allocate resources on the uplink channel. In DPRMA, the base station performs this function in an intelligent fashion based on the resource demands submitted by each active mobile, and the quality of service (QoS) requirements of each user type. Each user is responsible for providing updated information about its immediate bandwidth needs. The ability of a mobile user to dynamically change its bandwidth reservation request and the ability of the system to efficiently match this request with the actual resource allocation are the primary features of the system. The system investigated in this work contains voice, video conferencing, and data traffic. The capacity of the system over a Gilbert-Elliott fading channel is investigated. It is shown that there exists a threshold signal to noise ratio (SNR), above which the degradation of the system performance is relatively small. This threshold is traffic-type dependent. Values of the SNR threshold were identified for the different traffic types considered.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130302099","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

Errors in automatic location identification using timing advance 使用定时提前进行自动位置识别的错误

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686097

G. Yost, S. Panchapakesan

{"title":"Errors in automatic location identification using timing advance","authors":"G. Yost, S. Panchapakesan","doi":"10.1109/VETEC.1998.686097","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686097","url":null,"abstract":"Automatic location identification (ALI) techniques using timing advance (TA) are under active discussion for some TDMA cellular technologies. This technique measures distance from each receiving base station in terms of the amount that the timing of the mobile has to be advanced in order to properly fit into the correct time slot. TA is used as an approximation for TOA (time of arrival-the transit time from mobile station to base station) which allows one to draw circular contours around each receiving antenna; the location of the mobile is at the best intersection of all those contours in the least-squares sense. We analyze the statistical errors from the use of TA as an estimator for TOA and apply the results to example ALI problems. The equipment uses a process whereby a measurement of TOA is made with some intrinsic error and then a broad TA time slot is assigned; the user may not have access to the original TOA measurement. In estimating the errors it is critical to recognize that there is a non-negligible probability that the TOA measurement error is large enough that the wrong TA time slot (i.e., it does not bracket the true value of TOA) may be assigned. Given that the user only knows the time slot, the problem is to find an estimator and its error for the actual TOA.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130630477","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

Software radio structure for second generation mobile communication systems 第二代移动通信系统的软件无线电结构

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686181

A. Wiesler, F. Jondral

引用次数: 20

Dynamic enhanced radio resource allocation for wireless communication networks 无线通信网络的动态增强无线电资源分配

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686046

W. Egner, V. Prabhu

{"title":"Dynamic enhanced radio resource allocation for wireless communication networks","authors":"W. Egner, V. Prabhu","doi":"10.1109/VETEC.1998.686046","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686046","url":null,"abstract":"Mobility of the wireless user creates uncertainty in demand and non-optimum use of radio resources. Current wireless networks are periodically re-configured manually to improve network performance. These network reconfiguration and performance optimizations consume thousands of engineering hours and are often done by trial and error. However, the benefit of these efforts will be minimized as increasing competition throughout the world causes the service provider to dynamically change pricing structures to attract new customers and maintain existing customers. These changes in wireless service tariff and user base can drastically impact the network usage. This uncertainty further reduces the period of time a non-dynamically tuned network will perform optimally. Therefore, the need to reallocate the network and radio resources on the fly to maximize network infrastructure usage and minimize network costs will become increasingly important. This paper proposes a new enhanced method to dynamically allocate radio resources and evaluates the performance impact of this scheme using the configuration and operational measurements of an existing Global Standard Mobile (GSM) network over a period of several days. The new enhanced dynamic radio method reduces the total radio channel requirements by 10-20% over the currently used fixed allocation scheme. This new method improves the radio resource performance (the average C/I per Erlang) by 2.4 dB over a fixed allocation radio system.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"210 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113988570","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

Slow frequency hopping solutions for GSM networks of small bandwidth 小带宽GSM网络的慢跳频解决方案

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686454

T. Toftegard Nielsen, J. Wigard, P. Michaelsen, P. Mogensen

引用次数: 9

Coherent DLL code tracking and BER effect on QPSK demodulation in wideband DS-CDMA reverse link 相干DLL码跟踪和误码率对宽带DS-CDMA反向链路QPSK解调的影响

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686190

H. Oh

引用次数: 3

Investigating the performance of smart antenna systems at the mobile and base stations in the down and uplinks 研究智能天线系统在移动和基站的下行和上行链路上的性能

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.683708

K. Wong, K. B. Letaief, R. Murch

引用次数: 18

HIPERLAN type I: performance analysis of the channel access control protocol HIPERLAN type I:信道访问控制协议的性能分析

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686599

I. Vukovic

引用次数: 6

Performance evaluation of prioritization techniques used in mobile satellite networks based on an iterative method 基于迭代法的移动卫星网络优先级技术性能评价

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686527

V. Santos, M. Dinis, J. Neves

引用次数: 0

Interference analysis in an original TDMA-based high-density cellular radio network 基于原始tdma的高密度蜂窝无线网络的干扰分析

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.683674

Y. Begassat, V. Kumar

引用次数: 7