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Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)最新文献

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Movement locality-based location tracking strategy reducing location management cost in PCNs 减少pcn中位置管理成本的基于移动位置的位置跟踪策略
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801575
KwonWoo Yang, Joon-Min Gil, Kibom Kim, C. Hwang
{"title":"Movement locality-based location tracking strategy reducing location management cost in PCNs","authors":"KwonWoo Yang, Joon-Min Gil, Kibom Kim, C. Hwang","doi":"10.1109/VETECF.1999.801575","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801575","url":null,"abstract":"In this paper, we propose a new location management scheme that reduces location update and query cost. In order to reduce location update and query cost, the proposed scheme use movement locality. The scheme has the following features: (i) for mobile terminals in neighboring location areas, location update requires a one-hop message exchange, (ii) for the mobile terminal in neighboring location areas, location query requires a one-hop message exchange. Analytical models are set up to analyze the performance of the proposed scheme, and compare it with that of the IS-41 scheme. The measures of comparison used are the communication cost, the database cost, and the total cost. For all these measures, the proposed scheme performs better than the IS-41 scheme. Results also show that for low and high values of CMR, the scheme performs better than the IS-41 scheme.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114244357","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
The impact of FFT size on the performance of a combined OFDM-equalization radio modem FFT大小对组合式ofdm均衡无线电调制解调器性能的影响
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801545
S. Armour, A. Nix, D. Bull
{"title":"The impact of FFT size on the performance of a combined OFDM-equalization radio modem","authors":"S. Armour, A. Nix, D. Bull","doi":"10.1109/VETECF.1999.801545","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801545","url":null,"abstract":"Conventional OFDM systems employ a guard interval to combat delay spread distortion of transmitted data. This reduces the efficiency of the OFDM transmission. A combined OFDM-equalization transmission strategy is presented in this paper. This strategy employs an adaptive equalizer to combat delay spread distortion instead of a guard interval. This facilitates the use of very short guard intervals and thus the efficiency of the OFDM transmission is improved. This paper presents the combined OFDM-equalization techique and demonstrates the efficiency improvement that it offers over conventional OFDM. The performance of the pre-FFT equalizer is sensitive to time variation of the mobile radio channel's impulse response. Software simulation is employed to analyze this sensitivity and a relationship is determined between performance and FFT size. The results are considered in the context of application to existing and future mobile radio systems.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114589058","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 of an optical PPM/CDMA system with turbo coding 带turbo编码的光学PPM/CDMA系统的性能
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798472
J.Y. Kim, H. Poor
{"title":"Performance of an optical PPM/CDMA system with turbo coding","authors":"J.Y. Kim, H. Poor","doi":"10.1109/VETECF.1999.798472","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798472","url":null,"abstract":"In this paper, performance of an optical CDMA system with turbo coding is analyzed and simulated. It is assumed that the optical channel is an intensity-modulated (IM) channel and a direct-detection scheme is employed to detect the received optical signal. The modulation scheme used is pulse-position-modulation (PPM). From the simulation results, it is shown that turbo coding offers considerable coding gain with reasonable encoding/decoding complexity. Also, it is demonstrated that the performance of an optical CDMA system can be substantially improved by increasing the interleaver length and the number of iterations for a fixed code rate. The results in this paper can be applied, for example, to an optical wireless LAN operating in an indoor environment with multiple access applications.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121868636","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: 9
Knowledge-based multiple access protocol in broadband wireless ATM networks 宽带无线ATM网络中基于知识的多址协议
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801587
Hong Liu, U. Gliese, L. Dittmann
{"title":"Knowledge-based multiple access protocol in broadband wireless ATM networks","authors":"Hong Liu, U. Gliese, L. Dittmann","doi":"10.1109/VETECF.1999.801587","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801587","url":null,"abstract":"We propose a knowledge-based multiple access protocol for the extension of wireline ATM to wireless networks. The objective is to enable efficient transmission of all kinds of ATM traffic in the wireless channel with guaranteed QoS. The proposed protocol utilizes knowledge of the main characteristics of the traffic for allocating bandwidth efficiently to CBR, VBR and ABR/UBR connections by a compromise of assignment, contention, reservation and polling access techniques. Simulation results show that the proposed protocol can achieve a very high channel utilization of 90% while providing guaranteed QoS requirements to a variety of ATM applications.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121980446","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
Mobile host protocols for the Internet 因特网的移动主机协议
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.800295
A. Hác, Lei Guo
{"title":"Mobile host protocols for the Internet","authors":"A. Hác, Lei Guo","doi":"10.1109/VETECF.1999.800295","DOIUrl":"https://doi.org/10.1109/VETECF.1999.800295","url":null,"abstract":"This paper describes a new Mobile IP protocol supporting wide area networks. The Scalable Mobile IP (SMIP) allows any mobile host to move inside a large-scale area while being transparently connected to the Internet by using its permanent IP address. This protocol does not need to change other applications used to communicate with mobile hosts (MH), and has some new features over other mobile host IP, for instance, it is more scalable, faster, and more secure.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129669169","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
Iterative interference cancellation and decoding for DS-CDMA systems DS-CDMA系统的迭代干扰消除与解码
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801710
M. Howlader, B. Woerner
{"title":"Iterative interference cancellation and decoding for DS-CDMA systems","authors":"M. Howlader, B. Woerner","doi":"10.1109/VETECF.1999.801710","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801710","url":null,"abstract":"This paper discusses the integration of parallel interference cancellation (PIC) with forward error correction coding in a multiuser receiver for DS-CDMA systems. A soft-output PIC algorithm is followed by a log-MAP receiver for decoding of convolutional codes. An integrated receiver that implements multiple stages of interference cancellation and decoding is presented and evaluated through simulation. This integrated approach is compared with a partitioned approach, where the final stage output of PIC is followed by decoding using a soft-input Viterbi algorithm (VA). Results presented for BER and capacity of the two systems show that both techniques represent a substantial improvement over conventional detection, but the more complex integrated approach provides only a small improvement over the decoupled approach.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130340273","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: 9
On convolutionally encoded partial response CPM 关于卷积编码的部分响应CPM
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798412
Tommy Svensson, Arne Svensson
{"title":"On convolutionally encoded partial response CPM","authors":"Tommy Svensson, Arne Svensson","doi":"10.1109/VETECF.1999.798412","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798412","url":null,"abstract":"Convolutionally encoded partial response CPM is studied for an AWGN channel constrained by a narrow spectrum mask which puts hard requirements on both the width of the spectral main lobe and the size of the spectral side lobes. A family of uncoded partial response CPM schemes of different complexity based on the GMSK phase pulse are obtained. The schemes with best minimum Euclidean distance are compared with convolutionally encoded schemes meeting the same spectrum and information bit rate requirements. It is found that for 4-ary CPM there is a coding gain, but the best scheme is an 8-ary uncoded scheme and in most cases there is a coding loss, at least for the studied low memory order convolutional codes.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126889651","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
HCS: decision procedure for an interlayer handover 层间切换的决策程序
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801543
L. Jorguseski, D. Sparreboom
{"title":"HCS: decision procedure for an interlayer handover","authors":"L. Jorguseski, D. Sparreboom","doi":"10.1109/VETECF.1999.801543","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801543","url":null,"abstract":"The implementation of a hierarchical cell structure (HCS) for covering areas with high traffic load can increase the network performance. In general, three types of cells (layers) can be distinguished. These are picocells (picolayer), microcells (microlayer), and macrocells (macrolayer). The HCS technique is especially suitable if the traffic is generated from different user classes with regards to their average speed (e.g. pedestrians, slow vehicles, fast vehicles, etc.). There are two driving factors: (i) increasing the network capacity, which promotes use of small cells (e.g. microcells); and (ii) decreasing the number of handovers, which promotes use of larger cells (e.g. macrocells). An HCS system has one major impact on the radio resource management (RRM) that is dividing the available radio resources into parts for each layer. The amount of dedicated bandwidth should provide an acceptable quality of service (QoS) for the offered traffic in a particular layer. However, due to the scarcity of the radio bandwidth these resources should be used very efficiently. An interlayer handover is a step forward in achieving higher bandwidth utilization. In this investigation the focus is on the interaction between the macrolayer and microlayer through the interlayer handover procedure.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126911590","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
Capacity evaluation of the UTRA WCDMA interface UTRA WCDMA接口的容量评估
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798463
S. Akhtar, D. Zeghlache
{"title":"Capacity evaluation of the UTRA WCDMA interface","authors":"S. Akhtar, D. Zeghlache","doi":"10.1109/VETECF.1999.798463","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798463","url":null,"abstract":"Wide-band code division multiple-access (WCDMA) has been chosen as a basic radio-access technology for UMTS/IMT-2000. This paper provides independent radio subsystem capacity estimates for the UTRA FDD mode for different test environments using simulations. The evaluation methodology follows the recommendations outlined by ETSI SMG2. Environment and CDMA specific features are considered in our system level simulator.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130587997","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
Optimum MC-BPSK antenna diversity R/sub x/ structures for multi-user uncorrelated Rayleigh channels 多用户非相关瑞利信道中最优MC-BPSK天线分集R/sub /结构
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801726
H. Camkerten
{"title":"Optimum MC-BPSK antenna diversity R/sub x/ structures for multi-user uncorrelated Rayleigh channels","authors":"H. Camkerten","doi":"10.1109/VETECF.1999.801726","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801726","url":null,"abstract":"A unified model is presented and single-user coherent or p-coherent minimum BER one-shot (multi-carrier) MC-BPSK antenna diversity R/sub x/s are determined, for a multiple-access Rayleigh channel supporting a number (n) of partially overlapping fixed or mobile T/sub x/s, to optimize the use of electromagnetic spectrum, maximize the throughput and minimize the access delay of a time-synchronous cellular packet radio network.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114322550","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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