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IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond最新文献

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Multiwavelength technology for local loop applications
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.63928
D. Payne, A. Hill
{"title":"Multiwavelength technology for local loop applications","authors":"D. Payne, A. Hill","doi":"10.1109/GLOCOM.1989.63928","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.63928","url":null,"abstract":"Some of the possible options for the exploitation of wavelength division multiplexing (WDM) techniques in the local loop are illustrated. It is noted that few-wavelength systems will probably be the first systems to be exploited, and early practical realizations are discussed. It is further suggested that the fuller exploitation of the optical spectrum available will be via much more extensive high-density WDM. Techniques are described showing that these opportunities could rapidly follow from few-wavelength systems.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126015368","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
An architecture for programmable network elements 可编程网络元件的体系结构
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.63952
F. Ross
{"title":"An architecture for programmable network elements","authors":"F. Ross","doi":"10.1109/GLOCOM.1989.63952","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.63952","url":null,"abstract":"The author describes an architecture for a programmable network element which integrates the functionality of multiple network elements in the current intelligent network and provides for expansion to integrate new capabilities as the need arises. This system architecture provides the ability to provide a short-term programmable interface, rapidly conform to a standard control interface, and combine existing functionality to produce new types of network elements. The elements used in providing these abilities include: a highly modular, multitiered software architecture utilizing well-defined interfaces; a menu of available hardware components which can be mixed to meet the needs of the software architecture; a set of easily integrated functional clusters each providing a specific functional capability; and a fast packet switch connecting functional clusters to form new types of network elements.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127140648","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
Evolution from LAN and MAN access networks towards the integrated ATM network 从局域网和城域网接入网络向综合ATM网络的演变
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64190
B. Materna, Bob Vaughan, C.W. Britney
{"title":"Evolution from LAN and MAN access networks towards the integrated ATM network","authors":"B. Materna, Bob Vaughan, C.W. Britney","doi":"10.1109/GLOCOM.1989.64190","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64190","url":null,"abstract":"Possible scenarios for evolution of LAN (local area network), MAN (metropolitan area network), and B-ISDN (broadband integrated services digital network) networks toward the integrated ATM (asynchronous transfer mode) network are examined. A three-phase evolution scenario is presented. In the initial phase the broadband services will be provided by different types of MANs. The interim phase will offer interconnection of existing MANs by single ATM switches. In the final phase LANs, MANs, and ATM switches will be integrated into the B-ISDN. The user network interface (UNI) is defined as the standard interface for the MAN/MAN, MAN/ATM switch, and MAN/B-ISDN interconnection configurations. Interworking aspects are examined in context of the selected methodology. The first aspect examined is LAN-MAN interworking, followed by MAN-ATM interworking with reference to standards activities. An interworking model defining the hierarchical migration stages is presented. The impact of networking between evolving networks on quality of service and network performance is examined.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127354287","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
Signaling network operations system (SIGNOS) in Korea 信令网络操作系统(SIGNOS)
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64135
Misoon Kim, S. Kung, Younghee Lee
{"title":"Signaling network operations system (SIGNOS) in Korea","authors":"Misoon Kim, S. Kung, Younghee Lee","doi":"10.1109/GLOCOM.1989.64135","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64135","url":null,"abstract":"The authors describe an operations system designed to establish the network management and provisioning functions for a CCS (common channel signaling) network being deployed in Korea. The SIGNOS, which is a sort of centralized system to accommodate a number of SMX-1s (signaling message exchanges), consistently monitors and maintains the CCS network from a networkwide point of view to assure efficient utilization of the network. The authors introduce the system architecture and functions of SIGNOS and present an example of the interface between the operations system and network elements. In order to resolve the interface between SMX-1 and SIGNOS, the authors apply part of SMX-1 itself to the front end of SIGNOS, anticipating that CCITT protocol no.7 will be suitable for signaling network management in the future.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129005661","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 investigation into the economic impact of low-powered, digital radio in the telephone distribution plant 对电话配电厂中低功率数字对讲机的经济影响的调查
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64177
D. Duet
{"title":"An investigation into the economic impact of low-powered, digital radio in the telephone distribution plant","authors":"D. Duet","doi":"10.1109/GLOCOM.1989.64177","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64177","url":null,"abstract":"The author investigates the economic advantages of the application of multiplexing in local loops serving subscribers in a newly developed subdivision. The loop facility to accomplish this is a combination of digital multiplexed cable carrier systems from the central office to various radio ports strategically located in the serving area and low-powered, digital, multiple access radio links to connect the subscribers to the radio ports. To evaluate the cost advantages of multiplexing in every section of the local loop, the cost of a digital cable carrier/radio facility was compared to that of a conventional metallic-based facility with multiplexing only in the feeder portion of the loop. It is shown that the radio technology, with its ability to bring the cost advantages of multiplexing into the distribution plant, has the potential of being a viable alternative to a conventional metallic cable facility. The degree of attractiveness depends upon the system application (fixed or portable) and the system design (number of radio ports required).<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130744841","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
Multilevel codes for high-speed voiceband data modem 高速语音波段数据调制解调器的多级代码
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64280
A. Ushirokawa, H. Matsui
{"title":"Multilevel codes for high-speed voiceband data modem","authors":"A. Ushirokawa, H. Matsui","doi":"10.1109/GLOCOM.1989.64280","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64280","url":null,"abstract":"A novel class of multilevel codes is proposed for achieving high coding gain. Multilevel codes composed of two-level codes are investigated from the standpoint of the systematic design of codes. Two-level codes as component codes are shown to be preferable to a combination of conventional one-level codes in coding gain and decoder delay. For a 19.2 kb/s voiceband modem application, this scheme presents a class of coded modulation superior to trellis-coded modulation in simultaneous realization of high coding gain, low/moderate decoder complexity, and short decoding delay.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128852608","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
Performance considerations for slotted spread-spectrum random-access networks with directional antennas 带定向天线的开槽扩频随机接入网络的性能考虑
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64218
N. Pronios
{"title":"Performance considerations for slotted spread-spectrum random-access networks with directional antennas","authors":"N. Pronios","doi":"10.1109/GLOCOM.1989.64218","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64218","url":null,"abstract":"The throughput/delay performance of certain types of spread spectrum random-access (SSRA) networks employing directional antennas is considered. The use of directional antennas in the receiving sites to improve the network performance is presented and analyzed. The basic idea is to reduce the contention of the users (transmitters) by dividing the coverage area into different regions; at the receiving site, a single directional antenna is aimed at one region, so that transmissions from different regions do not interface with each other. In addition to the reduction of the multiuser interference, the directional antennas allow for different classifications, in different regions, of the users according to their physical and link level parameters. The throughput improvement is substantial for heavy-traffic conditions, and the gains are further amplified if the number of available receivers is increased. Numerical results for performance comparison with the case receivers using omnidirectional antennas are also included.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126241303","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
Fault tolerance: a verification strategy for switching systems 容错:交换系统的验证策略
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64047
Rob Paterson, Alan Dunne, Geoff Turner
{"title":"Fault tolerance: a verification strategy for switching systems","authors":"Rob Paterson, Alan Dunne, Geoff Turner","doi":"10.1109/GLOCOM.1989.64047","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64047","url":null,"abstract":"At GLOBECOM 87, R. Paterson described the new approach to performing failure mode analysis. This technique insured that each high-level functional failure mode of the detailed design is detected, recovered, and isolated according to the intent of the system-level design. Since that work, Bell-Northern Research has improved the technique and developed a toolset to make the analysis more efficient and effective. The toolset models a system from the high-level architecture to the device level while taking the software maintenance design into consideration. The model calculates the impact of subtle detail design changes at the system level and consequently identifies the effect on the end user and the operating company. The BNR design process and fault-tolerant verification process are described. To illustrate the approach considered, a switching network for a telephone switch is considered. It is concluded that the current fault tolerant verification strategy with the complementing toolset is an effective and efficient way of designing high-quality fault-tolerant systems.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126419395","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
Digital radio transmission modeling and simulation 数字无线电传输建模与仿真
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64162
M. Kavehrad, Pavel M. Balaban
{"title":"Digital radio transmission modeling and simulation","authors":"M. Kavehrad, Pavel M. Balaban","doi":"10.1109/GLOCOM.1989.64162","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64162","url":null,"abstract":"A computer simulation modeling study of terrestrial digital microwave radio transmission, using the Block Oriented System Simulator (BOSS) package, is reported. The basics of simulating multilevel quadrature amplitude modulated signals used for microwave radio transmission are presented. Emphasis is placed on semianalytical error rate evaluation for digital transmission. Simulation results include time and frequency domain representations of various system outputs. The simulations included pseudonoise sequence generation for source symbols, channel and transmit/receive filtering, equalization, and error probability evaluation.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121119322","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
High efficiency voice activated CDMA mobile communication system based on master code synchronization 基于主码同步的高效声控CDMA移动通信系统
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64064
R. De Gaudenzi, R. Viola
{"title":"High efficiency voice activated CDMA mobile communication system based on master code synchronization","authors":"R. De Gaudenzi, R. Viola","doi":"10.1109/GLOCOM.1989.64064","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64064","url":null,"abstract":"The authors propose an innovative code division multiple access (CDMA)-based mobile system for voice (and data) services. The system makes use of voice activation in order to increase the CDMA efficiency (useful transmitted information vs. occupied bandwidth). The synchronization problems are solved by distributing a master code in the forward link and using forced link activation in the return when no speech activity is detected. The blocking probability is minimized by means of multirate speech coding associated with a centralized network control. Bit error rate calculations show all the advantages of operating in a synchronous mode.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116208890","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
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