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IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)最新文献

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Multimedia communications: research, standardisation and regulation, hand in hand 多媒体通信:研究、规范、规范，携手共进
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.775676
A. Perkis
{"title":"Multimedia communications: research, standardisation and regulation, hand in hand","authors":"A. Perkis","doi":"10.1109/GLOCOM.1998.775676","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.775676","url":null,"abstract":"The evolution of 2nd to 3rd generation mobile communication systems is requiring a totally new approach to the development of services and applications. The applications are moving from speech to interactive multimedia and broadband services. The driving forces are a merging of technology, politics, and market demands. Success of this development is dependent on a close co-operation of manufacturers, the research community, regulators, and the standardisation bodies. The lack of a common understanding of the issues amongst them might be a problem. This paper addresses the different roles of the players and discusses the needs and possibilities for creating a fruitful environment suitable for deployment of broadband multimedia communications.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124525620","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
Performance of OFDM systems with time-limited waveforms over multipath radio channels 时域OFDM系统在多径无线电信道上的性能
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776872
S. B. Slimane
{"title":"Performance of OFDM systems with time-limited waveforms over multipath radio channels","authors":"S. B. Slimane","doi":"10.1109/GLOCOM.1998.776872","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776872","url":null,"abstract":"Pulse shaping can effectively reduce the sensitivity of orthogonal frequency division multiplexing (OFDM) scheme to frequency and time variations but at the same time introduce correlation between subcarriers that destroys the orthogonality of the system. This correlation is however well defined and can be effectively used at the receiver in the detection process. This paper investigates the performance of OFDM systems when using time-limited waveforms over multipath radio channels. For pulse shaping of the same duration as the OFDM block interval, the memory between the subcarriers can be fully utilized by means of a maximum likelihood sequence estimation (MLSE) detector. It is shown that with such a detector, pulse shaping improve the performance of OFDM systems in multipath radio channels. The obtained results also show the advantage of employing pulse shaping with OFDM systems in the presence of long echoes.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125622771","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
An efficient deterministic bandwidth allocation method in interactive video-on-demand systems 交互式视频点播系统中一种高效的确定性带宽分配方法
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776824
N. Kamiyama, V. Li
{"title":"An efficient deterministic bandwidth allocation method in interactive video-on-demand systems","authors":"N. Kamiyama, V. Li","doi":"10.1109/GLOCOM.1998.776824","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776824","url":null,"abstract":"An interactive video-on-demand (IVOD) system requires continuous video playback, and network bandwidth should be allocated to satisfy quality of service (QOS) requirements. Bandwidth allocation methods can be classified into two categories: static and dynamic. There are two types of static allocation methods: deterministic and statistical. In deterministic allocation, bandwidth which provides deterministic QOS is allocated only at call setup time. Although the implementation is simpler than other methods, it suffers from low bandwidth utilization. In this paper, we propose a new deterministic static bandwidth allocation method which improves bandwidth utilization. This method does not require set-top box (STB) control. This decreases the STB cost and the signalling overhead in the network.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125627828","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: 10
Functional architecture and information models for the management of optical networks 光网络管理的功能体系结构和信息模型
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.775939
L. Berthelon, C. Drion, F. Roue-Peden, G. Eilenberger, O. Chambon, T. Henriksen, L. Dembeck, F. Masetti
{"title":"Functional architecture and information models for the management of optical networks","authors":"L. Berthelon, C. Drion, F. Roue-Peden, G. Eilenberger, O. Chambon, T. Henriksen, L. Dembeck, F. Masetti","doi":"10.1109/GLOCOM.1998.775939","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.775939","url":null,"abstract":"This paper addresses the management of photonic networks. It presents the first achievements of the ACTS-MEPHISTO project. The project's general objective is to extend the principles of network management (TMN) to generic all-optical networks, in which wavelength division multiplexing (WDM) will be implemented far transmission and routing. This includes the development of information models for optical networks and network elements, of management applications and test platforms to demonstrate fault, configuration and performance management of optical networks, and the promotion of the developed models within ACTS and standardisation bodies. The functional architecture and early information models for the management of optical networks and network elements are described.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121937883","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
Low overhead pilot-aided synchronization for single carrier modulation with frequency domain equalization 具有频域均衡的单载波调制低开销导频辅助同步
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.775902
A. Czylwik
{"title":"Low overhead pilot-aided synchronization for single carrier modulation with frequency domain equalization","authors":"A. Czylwik","doi":"10.1109/GLOCOM.1998.775902","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.775902","url":null,"abstract":"This paper deals with the synchronization of single carrier transmission with frequency domain equalization (FDE) for broadband mobile radio applications (e.g. wireless ATM). For such applications the carrier frequency and temporal position of the FFT (fast Fourier transform) window have to be synchronized. Furthermore, an estimation of the channel transfer function is necessary. A synchronization concept is presented which uses only one pilot FFT symbol for all the required synchronization tasks.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115781849","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
Integrated design for digital transmission of speech signals over noisy channels 噪声信道上语音信号数字传输的集成设计
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776559
D. G. Daut, Wei-qun Ma
{"title":"Integrated design for digital transmission of speech signals over noisy channels","authors":"D. G. Daut, Wei-qun Ma","doi":"10.1109/GLOCOM.1998.776559","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776559","url":null,"abstract":"This paper presents an integrated adaptive communication system for speech transmission over time-varying noisy channels for wireless communications. All major subsystems, including variable-rate speech coding, variable-rate channel coding and variable-level modulation are adaptive and configured according to one of several available system operating states. The transition between the system states is controlled by the estimation of reconstructed signal quality. Dual-adaptive DPCM is employed as the speech encoder with both fast and slow adaptation. Transmit power adjustment is performed independently at both ends of the duplex system. Simulation results show that the quality of reconstructed speech signal is robust with respect to various rates on the fading of time-varying Rayleigh channels.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130060763","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
Handoff routing strategies and mobility in multicarrier wireless networks 多载波无线网络中的切换路由策略和移动性
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776571
J.J. Mora-Zamorano, C. Vargas-Rosales
{"title":"Handoff routing strategies and mobility in multicarrier wireless networks","authors":"J.J. Mora-Zamorano, C. Vargas-Rosales","doi":"10.1109/GLOCOM.1998.776571","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776571","url":null,"abstract":"An analytical model for a wireless system composed of several wireless networks working with different carriers and sharing the resources to give a better service to their users when handing off is introduced. We use capacity, overload, reservation and mobility variables to characterize the wireless network, which is modeled as a network of queues. We propose some methods for allocation, of the resources, namely sequential, uniform and m-uniform schemes. We found that m-uniform scheme improves the performance in the network by allowing overflow of users from a carrier to be offered as traffic into other cells of other carriers.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130186336","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
On the degradation of OFDM-signals due to peak-clipping in optimally predistorted power amplifiers 最佳预失真功率放大器中峰值削波对ofdm信号的影响
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776868
M. Friese
{"title":"On the degradation of OFDM-signals due to peak-clipping in optimally predistorted power amplifiers","authors":"M. Friese","doi":"10.1109/GLOCOM.1998.776868","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776868","url":null,"abstract":"The intermodulation noise in OFDM bandpass signals after passing an optimally predistorted power amplifier is investigated by a combination of analytical and numerical calculation. The results are illustrated for several modulation alphabets and it is shown that with ideal predistortion and a small symbol alphabet only a few dB of power back-off are required to achieve small error probabilities.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134120024","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: 61
Impact of misbehaving users and the role of policers in ABR service 行为不端的用户对ABR服务的影响及政策制定者的角色
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776649
A. Kolarov, G. Ramamurthy, T. Takamichi, T. Murase
{"title":"Impact of misbehaving users and the role of policers in ABR service","authors":"A. Kolarov, G. Ramamurthy, T. Takamichi, T. Murase","doi":"10.1109/GLOCOM.1998.776649","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776649","url":null,"abstract":"A closed loop rate based feedback control to support ABR service has been defined. In this approach the network at periodic intervals informs all transmitting sources the maximum rate at which the sources are allowed to transmit. For the scheme to be successful in that the network utilization is high and fairness is ensured for all competing users, it is imperative that all sources conform to the maximum rate at which they are allowed to transmit. To ensure the goals of ABR service are satisfied, especially in public networks, it is essential to police sources and penalize violating sources when deemed necessary. In this paper we investigate the effect of misbehaving or violating users on the network performance and the effectiveness of policing such sources. We investigate 3 policing mechanisms in terms of their effectiveness in maintaining a high utilization and ensuring fairness among all competing users. The study shows that simple policing mechanisms are sufficient to protect the network from violating or misbehaving users.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134591093","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
NAK-based flow control scheme for reliable multicast communications 基于nak的可靠组播通信流控制方案
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250) Pub Date : 1998-11-08 DOI: 10.1109/GLOCOM.1998.776460
M. Tamamoto, Y. Sawa, S. Fukatsu, H. Ikeda
{"title":"NAK-based flow control scheme for reliable multicast communications","authors":"M. Tamamoto, Y. Sawa, S. Fukatsu, H. Ikeda","doi":"10.1109/GLOCOM.1998.776460","DOIUrl":"https://doi.org/10.1109/GLOCOM.1998.776460","url":null,"abstract":"In reliable multicast communications, lost information due to packet loss should be re-multicast. The NAK-based retransmission scheme is said to be effective for scalable reliable multicast communications because it can avoid implosion of the control packet. When the source sends packets faster than the receiver's capacity, packet loss due to buffer overflow occurs constantly at the corresponding receivers. With this constant packet loss, implosion of the control packet degrades the total throughput seriously even in the case of the NAK-based retransmission scheme. In order to prevent this kind of constant packet loss at the receivers, the flow control scheme should be implemented for reliable multicast communications. In the paper we propose a new flow control scheme, which is suitable for the NAK-based retransmission scheme. From the viewpoint of flow control, receiving a NAK intends that the transmission rate is too high. However in multicast communications, multiple NAKs may be generated for a corresponding packet. If simply receiving a NAK decreases the transmission rate, the rate may be decreased excessively. In the paper, log information of the transmission rate stored at the sender is proposed in order to prevent the transmission rate from decreasing excessively. Performance evaluation by computer simulation shows that our proposed scheme notably improves throughput performance compared with the case of no flow control.","PeriodicalId":414137,"journal":{"name":"IEEE GLOBECOM 1998 (Cat. NO. 98CH36250)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129409078","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: 12
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