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1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)最新文献

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Comparison of replication of the user mobility profile with caching for reduction of HLR accesses 比较用户移动性配置文件的复制与用于减少HLR访问的缓存
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655502
S. Palat, S. Andresen
{"title":"Comparison of replication of the user mobility profile with caching for reduction of HLR accesses","authors":"S. Palat, S. Andresen","doi":"10.1109/ICPWC.1997.655502","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655502","url":null,"abstract":"The widespread deployment of mobile personal communication services will lead to a tremendous increase in the number of real time updates and queries to the network databases. The centralised home location register (HLR) in GSM can be a potential bottleneck. Most users have regular calling and mobility patterns (or profiles) which can be used to reduce database accesses. Selective replication of the user mobility profiles (SRP) at the source-MSC/VLR can reduce HLR queries. Using GSM as the reference, this paper studies the cost of replicating user mobility profiles and compares its performance with caching the VLR number. It is shown that SRP performs better for a mobile which has a higher mobility rate compared to the incoming call rate from a switch. The paper also suggests a combined scheme with better overall performance.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130170033","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 flexible and fast event-driven simulator for wireless MAC protocols 一个灵活和快速的事件驱动的无线MAC协议模拟器
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655489
G.R.J. Linnenbank, P. Havinga
{"title":"A flexible and fast event-driven simulator for wireless MAC protocols","authors":"G.R.J. Linnenbank, P. Havinga","doi":"10.1109/ICPWC.1997.655489","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655489","url":null,"abstract":"Many multiple-access (MAC) protocols have been or are being proposed for wireless networks. As most of these multiple-access protocols are designed for specific applications (such as telephony) and analyzed accordingly, the analysis results can not always be adapted to situations where each user has a different behavior. Wireless MAC protocols for data communication are not straightforward to analyse. To quickly make a reliable judgement of the usability of a MAC protocol for specific situations, we designed a simulator that makes it simple to implement the protocol and test it in different configurations and with differently behaving users. Our simulator generates a large amount of quantitative performance information that can be processed with standard graph drawing tools and an integrated trace analyzer.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"12 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114547538","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: 3
Mobile data applications in industry, trade, transport and distribution 移动数据在工业、贸易、运输和分销中的应用
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655569
J. Verhoosel, P.H.W.M. Oude Luttighuis
{"title":"Mobile data applications in industry, trade, transport and distribution","authors":"J. Verhoosel, P.H.W.M. Oude Luttighuis","doi":"10.1109/ICPWC.1997.655569","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655569","url":null,"abstract":"This paper reports on a study on potential mobile data applications in industry, trade, transport and distribution. We describe the main business processes in this sector, from which mobile data applications are derived. In addition, these applications are matched on different mobile networks based on a network-characteristics framework.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132185756","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
An implementation of interworking system for CDMA wireless data communications CDMA无线数据通信互联系统的实现
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655531
M. Jang, Dong-Beom Shin, Daeyoung Kim
{"title":"An implementation of interworking system for CDMA wireless data communications","authors":"M. Jang, Dong-Beom Shin, Daeyoung Kim","doi":"10.1109/ICPWC.1997.655531","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655531","url":null,"abstract":"Wireless data services and systems represent a rapidly growing and increasingly important segment of the communications industry. We describe the implementation of an interworking system for CDMA wireless data services between the mobile subscriber with a data terminal and the public subscriber in the public switched telephone network (PSTN) with a personal computer or G3 facsimile terminal. This module can be used to make a search of information, which is included in the database of a data network. To adapt this module for the mobile communication network, we suggested the use of a system structure in parallel with the mobile switching system in order to reduce the influence of the network configuration. This system can be used to provide an end to end data communication service and a means of searching for information in databases.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133960619","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
Performance evaluation of the trial system based on wideband CDMA 基于宽带CDMA的试验系统性能评价
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655535
O. Keisuke, W. Akihiko
{"title":"Performance evaluation of the trial system based on wideband CDMA","authors":"O. Keisuke, W. Akihiko","doi":"10.1109/ICPWC.1997.655535","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655535","url":null,"abstract":"This paper outlines the performance evaluation for verification of the wideband CDMA system. The characteristics of the wideband CDMA system (IS-665), which attracts much attention as one of the next generation PCS (personal communication service) systems, were evaluated. These are PCS standards which are aimed, at high-quality voice transmission equivalent to PSTN, radio data transmission and packet radio transmission. The outdoor field trial results are discussed. The field trial was carried out at a carrier frequency of 2 GHz, a transmission output of 29 dBm and by a three-sector system. The area evaluated under the microcell service experiment was within a radius of about 0.5 miles either in an urban or suburban area. As the voice coding method, 32 kbps ADPCM voice coding featuring good transmission characteristics in a poor radio propagation environment was adopted. As a result of characteristic evaluation trials in the actual environment, it has been shown that the wideband CDMA system is a new promising PCS system and is also favorable for FPLMTS and IMT-2000.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134287653","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
On the performance of a multichannel R-ALOHA protocol for voice and data integration in short-haul wireless communication environments 短距离无线通信环境下语音和数据集成的多通道R-ALOHA协议的性能研究
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655563
A.Z.M.E. Hossain, M.Z. Rahman, M.M. Islam
{"title":"On the performance of a multichannel R-ALOHA protocol for voice and data integration in short-haul wireless communication environments","authors":"A.Z.M.E. Hossain, M.Z. Rahman, M.M. Islam","doi":"10.1109/ICPWC.1997.655563","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655563","url":null,"abstract":"A multichannel R-ALOHA protocol is designed for voice and data integration from the user point of view in a short haul communication environment. The performance of this protocol is studied through simulation for a constant probability retransmission control scheme. For a relatively small ratio of number of active users to the number of channels, a system throughput as large as 90% can be achieved with tolerable average voice message delay and acceptable voice packet dropping probability. The effects of the different system variables on the performance parameters, namely, normalized steady state system throughput, average voice message delay, average data message delay and voice packet dropping probability, have been investigated. Like S-ALOHA such a protocol would be easy to implement.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124757873","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
Real time stock price distribution utilising the GSM short messaging service 实时股票价格分布利用GSM短消息服务
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655550
L. Kilmartin, D. Friel
{"title":"Real time stock price distribution utilising the GSM short messaging service","authors":"L. Kilmartin, D. Friel","doi":"10.1109/ICPWC.1997.655550","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655550","url":null,"abstract":"The development of value added services based upon the GSM standard is becoming increasingly important to both network operators and the subscriber's to such networks. This paper outlines a prototype system capable of delivering real time stock (share) price information from Internet based stock price servers to mobile subscribers equipped with GSM cellular terminals. The prototype system is based upon a gateway PC system which is connected to both the Internet and also the GSM cellular network. The system allows a subscriber to the service to receive updates on stock prices at desired intervals throughout the day, or on demand, primarily by means of short messages delivered to their GSM mobile phone. In addition to this primary delivery mechanism, a number of enhanced delivery mechanism have also been designed into the system based around a \"dial up\" interactive voice response (IVR) system on the gateway PC platform. These allow a subscriber to get an immediate update, by a short message or by a spoken prompt, of some/all of his stock portfolio by dialling up and interacting with the IVR functionality in the system server.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128873811","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
Overview of multiuser detection/interference cancellation for DS-CDMA DS-CDMA多用户检测/干扰消除技术综述
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655490
T. Ojanpera
{"title":"Overview of multiuser detection/interference cancellation for DS-CDMA","authors":"T. Ojanpera","doi":"10.1109/ICPWC.1997.655490","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655490","url":null,"abstract":"Wideband DS-CDMA has gained a lot of attention for the third generation wireless systems (UMTS and IMT-2000). On the other hand, multiuser detection has been under intense research since the formulation of optimum multiuser detector by Verdu in 1986. For the third generation wireless systems, several wideband CDMA schemes with multiuser detection have been proposed. This paper presents an overview of developments in the field of multiuser detection for DS-CDMA. Finally, possible future research directions are suggested.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130030381","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: 25
A new carrier recovery method for 16-QAM signal 一种新的16-QAM信号载波恢复方法
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655506
Young-Ok Park, J. Ahn
{"title":"A new carrier recovery method for 16-QAM signal","authors":"Young-Ok Park, J. Ahn","doi":"10.1109/ICPWC.1997.655506","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655506","url":null,"abstract":"We propose a new carrier recovery method for the 16-level quadrature amplitude modulation (16-QAM) signal, which reduces the phase jitter of the recovered carrier. In this method, the received 16-QAM signal is processed in two paths; one path transforms the received signal into a 12-PSK signal, and the other detects the envelope of the received signal. Using an envelope detector and a window detector, we extract the time period that the 16-QAM signal causing phase jitter exists. We recover the carrier phase from the 12-PSK signal using a digital phase locked loop (PLL) which is controlled by the window detector output. By this method, the data pattern-related noise of the conventional times-four carrier recovery method is entirely eliminated. We implement an experimental model to examine the proposed method.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130462342","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
Implementation of base station receiver for CDMA wireless local loop system CDMA无线本地环路系统基站接收机的实现
1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338) Pub Date : 1997-12-17 DOI: 10.1109/ICPWC.1997.655544
J. Chung, J.S. Kim, Y. Jeong, J. Ha
{"title":"Implementation of base station receiver for CDMA wireless local loop system","authors":"J. Chung, J.S. Kim, Y. Jeong, J. Ha","doi":"10.1109/ICPWC.1997.655544","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655544","url":null,"abstract":"The wireless local loop (WLL) system has been deployed as a new application for wireless communication with fixed subscriber units which impose a fixed to fixed propagation and no handoffs compared to the wireless mobile communication systems. The design of the WLL system is much simpler than that of a mobile system because no handoff occurs in a fixed-to-fixed link. This paper describes the hardware design and implementation of base station receiver for code division multiple access (CDMA) WLL system proposed by Electronics and Telecommunications Research Institute (ETRI). This base station demodulator module of the WLL system is implemented by hardware chips, such as a digital signal processor (DSP), erasable programmable logic device (EPLD), and a field programmable gate array (FPGA). Timing simulation of the implemented system is operated using the ALTERA MAXPLUS tool. The basic hardware modules of the base station receiver consist of two searchers for antenna diversity and four fingers for multipath combining. We verify the operation of the code acquisition and time tracking loop on the call test. The reconstructed speech shows a good quality in the reverse link.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126334037","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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