{"title":"Trade-offs in routing private multicast traffic","authors":"Mcast-H, L. Gong, N. Shacham","doi":"10.1109/GLOCOM.1995.502779","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502779","url":null,"abstract":"Multicast is a convenient and important mode of communication in internetworks, and there has been a number of studies on efficient routing of multicast traffic. In particular, simulation has been performed to evaluate the tradeoffs between source-specific trees and shared trees, and between various routing algorithms. We show that the consideration of security brings a new set of tradeoffs in routing private multicast traffic. We describe these trade-offs between security, trust, knowledge of group membership and of topology, types of multicast tree, bandwidth consumption, and latency. We propose four methods to improve efficiency: message pruning, message reprocessing, hot-start authentication, and continuous authentication. This study of new trade-offs helps in choosing the appropriate multicast strategies for specific applications.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130545030","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}
{"title":"Mobile multimedia: in context to ATM transport and GSM/GPRS mobile access networks","authors":"Shyam Chakraborty","doi":"10.1109/GLOCOM.1995.502744","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502744","url":null,"abstract":"A mobile communication system requires an underlying wireline transport network, while the radio interface acts as the access network. In the wireline domain, the asynchronous transfer mode (ATM) is considered to be the chosen transport network to cater for a wide variety of services, to reach the user through a suitable access network. So, a scenario of mobile access and an ATM backbone, for mobile multimedia is of prime importance. The GSM is presently being standardised to cater for a multitude of services through the GPRS (General Packet Radio Services) provisions. Since the ATM and the GSM specifications have been evolving independently, they have to be bridged at some point. We cover issues concerning a general mobile access network to an ATM backbone, catering to mobile multimedia. In particular, we turn the focus towards the GSM system as an access network, and contradict some essential features for example, the cell relay over the mobile interface, that is popular at present in context of mobile multimedia.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131593904","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}
{"title":"Mobility management in a wireless ATM LAN","authors":"M. Veeraraghavan, M. Karol, K. Eng","doi":"10.1109/GLOCOM.1995.500373","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.500373","url":null,"abstract":"This paper presents the mobility management and connection control aspects of a wireless ATM LAN. This is part of an ongoing research project to explore various aspects of wireless ATM networking to support multimedia PCS applications. The LAN combines positive aspects of connection-oriented and datagram communication schemes in its usage of the ATM VP/VC concept. In-sequence cell delivery and QoS guarantees are provided for on-demand connections without requiring any node-by-node configuration at the transit nodes. We describe the mobility management procedures of mobile tracking, mobile location, and active handoffs. We also describe the algorithms used to admit connections with or without QoS checking.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130223770","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}
{"title":"A fuzzy expert system for usage parameter control in ATM networks","authors":"V. Catania, G. Ficili, S. Palazzo, D. Panno","doi":"10.1109/GLOCOM.1995.502620","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502620","url":null,"abstract":"In ATM networks usage parameter control is required in order to ensure that each source conforms to its negotiated parameters. However, traditional methods, such as leaky bucket and window mechanisms, revealed themselves to be inefficient in coping with the conflicting requirements of the ideal policing. We propose a fuzzy expert system for usage parameter control. The control strategy is described through a set of fuzzy inferences which emulate the knowledge base that is typical of human expertize. The simulation results shown in the paper demonstrate that our fuzzy policer outperforms conventional policing mechanisms.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116206344","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}
{"title":"An open object-oriented simulation system for communications networks","authors":"W. Jing, A. A. Fredericks","doi":"10.1109/GLOCOM.1995.502746","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502746","url":null,"abstract":"Modeling and simulation can provide an important means for reducing the communications network design and engineering cycles, by helping to ensure that performance objectives are met and for developing effective control strategies to ensure efficient system operations and graceful degradation under system overload. The complexity of emerging systems and services has raised the problem of model reuse to a critical stage. We present an open, object-oriented simulation system for communications networks that is currently being developed at Monmouth University as an integral part of a larger integrated environment for modeling, analysis, simulation and engineering of computer/communications systems. A primary objective of the open simulation system is to promote the reuse and sharing of simulation models for communications networks and their components. Particular attention is paid to traffic generation models which are greatly increasing in their complexity. The system presented is designed to ease the transition in the future to a distributed simulation environment.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120879501","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}
{"title":"FM family code","authors":"S. Tazaki, S. Tsuzuki, Y. Yamada","doi":"10.1109/GLOCOM.1995.502631","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502631","url":null,"abstract":"The FM code is a very famous non-block recording code and has already become popular at the dawn of digital magnetic recording. This code still remains available due to the advent of effective signal processing methods such as PRML (partial response maximum likelihood) up to the extremely high density recording age. We develop a systematic and comprehensive investigation of FM family codes.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121342723","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}
{"title":"Interference localisation for the Eutelsat satellite system","authors":"R. Bardelli, D. Haworth, N. Smith","doi":"10.1109/GLOCOM.1995.502690","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502690","url":null,"abstract":"In its effort to minimise the damage to satellite traffic caused by interference, EUTELSAT undertook, together with DRA (UK Defence Research Agency), a study aimed at determining the benefits provided by the current transmitter location techniques. The study included a theoretical phase and a measurement campaign involving the execution of a number of tests on simulated interference using a transmitter location system (TLS) developed and operated by DRA. As a result of the study, Eutelsat decided to enter into a contract with DRA for the provision of a transmitter location service. This paper discusses the major subjects treated in the study, with special attention to: the benefits, for location accuracy derived from the use of reference signals, the optimum measurement strategy, the potential enhancements of the current system and the manner in which Eutelsat intends to exploit the information provided by the TLS in the context of its network management procedures.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122320106","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}
{"title":"Normalized diversity receiver with multi-symbol detection","authors":"G. Caire, J. Ventura-Traveset, E. Biglieri","doi":"10.1109/GLOCOM.1995.502010","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502010","url":null,"abstract":"We present an analysis of coded modulation with block differential detection in a correlated Rician fading channel with space diversity. Coded differential PSK is included in our analysis as a special case. Through cut-off rate analysis we compare different coded channels resulting from the choice of the block length N and the diversity order M with slow fading. With fast fading, the simple branch metric considered is not maximum-likelihood. By deriving a necessary and sufficient condition for the existence of an error floor, we show that, when the fading is not slow, it always exists, and decreases exponentially with the product of code diversity and space diversity.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116302492","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}
{"title":"Performance of block turbo coded 16-QAM and 64-QAM modulations","authors":"R. Pyndiah, A. Picart, Alain Glaveux","doi":"10.1109/GLOCOM.1995.502563","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502563","url":null,"abstract":"We present the results of our investigation concerning the performance of block turbo codes associated with high spectral efficiency QAM modulations. By using a pragmatic approach, simulation results show that all the block turbo coded QAM modulations we have tested are at 2.9/spl plusmn/0.2 dB of their Shannon's limit. The block turbo coded QAM modulations also outperform TCM schemes by at least 1 dB at a BER (bit error rate) of 10/sup -5/. Concerning convolutional turbo coded QAM modulations, the block turbo coded QAM modulations exhibit slightly better performance for spectral efficiencies greater than 4 bits/s/Hz.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126630522","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}
{"title":"Modelling and simulation of an indoor radio channel at 20 GHz","authors":"I. Oppermann, J. Graham, B. Vucetic","doi":"10.1109/GLOCOM.1995.502027","DOIUrl":"https://doi.org/10.1109/GLOCOM.1995.502027","url":null,"abstract":"This paper reports the results of measurements and analysis of the indoor radio propagation channel at 20 GHz. The experiment consisted of taking impulse response measurements in several locations corresponding to typical office environments while varying numbers of users carried out normal daily activities. This paper presents some of the parameters extracted from the measured impulse responses which characterise the channel and details the parameter extraction process used. These parameters are used in a channel simulation model and the output of this simulation is compared to the original data on the basis of direct and multipath amplitudes and probability density functions.","PeriodicalId":152724,"journal":{"name":"Proceedings of GLOBECOM '95","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127039507","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}
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