Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258271
Qiang Wang, T. Gulliver, L. Mason, V. Bhargava
Results of a study into the performance of slow frequency hopping M-ary differential phase shift keying (MDPSK) signaling in the presence of both tone jamming and Gaussian noise are presented. Previous work has been extended by considering larger signal sets and skewed differential phases with unequal decision regions. Probability distributions are used instead of calculating a set of probabilities over symmetrical decision regions. This allows the optimization of the decision regions in tone jamming from the equal regions used in Gaussian noise environments. The error performance when a frequency offsets exists between the jamming tone and MDPSK carrier is also considered.<>
{"title":"Performance of SFH/MDPSK in tone interference and Gaussian noise","authors":"Qiang Wang, T. Gulliver, L. Mason, V. Bhargava","doi":"10.1109/MILCOM.1991.258271","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258271","url":null,"abstract":"Results of a study into the performance of slow frequency hopping M-ary differential phase shift keying (MDPSK) signaling in the presence of both tone jamming and Gaussian noise are presented. Previous work has been extended by considering larger signal sets and skewed differential phases with unequal decision regions. Probability distributions are used instead of calculating a set of probabilities over symmetrical decision regions. This allows the optimization of the decision regions in tone jamming from the equal regions used in Gaussian noise environments. The error performance when a frequency offsets exists between the jamming tone and MDPSK carrier is also considered.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133191128","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258255
C. Niznik, J. Frank
The basic computer network testbed facility centralized core distributed inner core (CCDIC) simulation protocol characteristics are an emulation of real time, heavy load, simultaneous, synchronous and asynchronous parallel inputs in a deadlock and livelock free, contention resolved manner. The centralized distributed stars topology representation of the testbed configuration enables network growth with a topology comfortable to congestion prevention and control at various levels of service. The CCDIC protocol, a congestion-controlled, buffer management protocol, prevents the throughput degradation which is allowed to occur in the discrete event simulation illustrated in the performance comparison. A neural network forecaster protocol, within the CCDIC simulation framework, enables intelligent decision processes. The geometric CCDIC protocol structure enforces optimal Ada CCDIC software implementation for execution of message operation on processors and connectivity between analyzer resources.<>
{"title":"Test bed computer network centralized core and distributed inner core simulation protocol organization, development, and performance evaluation realizing a neural network forecaster","authors":"C. Niznik, J. Frank","doi":"10.1109/MILCOM.1991.258255","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258255","url":null,"abstract":"The basic computer network testbed facility centralized core distributed inner core (CCDIC) simulation protocol characteristics are an emulation of real time, heavy load, simultaneous, synchronous and asynchronous parallel inputs in a deadlock and livelock free, contention resolved manner. The centralized distributed stars topology representation of the testbed configuration enables network growth with a topology comfortable to congestion prevention and control at various levels of service. The CCDIC protocol, a congestion-controlled, buffer management protocol, prevents the throughput degradation which is allowed to occur in the discrete event simulation illustrated in the performance comparison. A neural network forecaster protocol, within the CCDIC simulation framework, enables intelligent decision processes. The geometric CCDIC protocol structure enforces optimal Ada CCDIC software implementation for execution of message operation on processors and connectivity between analyzer resources.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131901151","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258360
P. Leahy
Recent developments in electronic key management systems offer the opportunity for improved security and administrative effectiveness with lower operational cost. Key distribution is a subset of a total information management system designed to provide responsive and efficient use of communications resources. The IRIS crypto-material management system (CMMS) supports the communications management system (CMS) to provide an integrated communications and security management function. The author describes the hardware and software architecture that provides security and INFOSEC protection for the critical key management functions. Distribution of keying material in black form significantly reduces the risk of compromise. The CMMS is a portable-data-terminal-based software program used to perform the cryptonet engineering and the net management functions of the CMS. Operational requirements include planning for key distribution, cryptonet reconfiguration due to force restructuring, compromise recovery, reporting, accounting of all crypto material, and personal security information.<>
{"title":"INFOSEC considerations for tactical key management in the IRIS radio system","authors":"P. Leahy","doi":"10.1109/MILCOM.1991.258360","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258360","url":null,"abstract":"Recent developments in electronic key management systems offer the opportunity for improved security and administrative effectiveness with lower operational cost. Key distribution is a subset of a total information management system designed to provide responsive and efficient use of communications resources. The IRIS crypto-material management system (CMMS) supports the communications management system (CMS) to provide an integrated communications and security management function. The author describes the hardware and software architecture that provides security and INFOSEC protection for the critical key management functions. Distribution of keying material in black form significantly reduces the risk of compromise. The CMMS is a portable-data-terminal-based software program used to perform the cryptonet engineering and the net management functions of the CMS. Operational requirements include planning for key distribution, cryptonet reconfiguration due to force restructuring, compromise recovery, reporting, accounting of all crypto material, and personal security information.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134395181","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258454
R. Fang
The concept of a fully meshed network of a briefcase-sized terminals is presented for personal and thin-route communications over Ku-band satellite transponders. In this concept, undesirable double-hop delays are avoided for voice communications. The bandwidth and power resources of the transponder are efficiently shared by users in a simple demand-assigned manner via code-division multiple access (CDMA). Voice, data, and facsimile are statistically multiplexed at each terminal. In order to minimize terminal costs, frequency-precorrected and level-preadjusted continuous-wave tones are sent from the central network control station in each beam so that the terminals in each downlink beam can use these pilots as references for antenna acquisition and tracking, as reliable frequency sources, and as indicators of signal fade for uplink power control (ULPC). The potential CDMA near-far problem due to uplink fades is mitigated by using ULPC. Quasi-burst mode transmission is used to minimize the potential of clock and pseudorandom number code synchronization.<>
{"title":"Personal and thin-route communications via K-band satellite transponders","authors":"R. Fang","doi":"10.1109/MILCOM.1991.258454","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258454","url":null,"abstract":"The concept of a fully meshed network of a briefcase-sized terminals is presented for personal and thin-route communications over Ku-band satellite transponders. In this concept, undesirable double-hop delays are avoided for voice communications. The bandwidth and power resources of the transponder are efficiently shared by users in a simple demand-assigned manner via code-division multiple access (CDMA). Voice, data, and facsimile are statistically multiplexed at each terminal. In order to minimize terminal costs, frequency-precorrected and level-preadjusted continuous-wave tones are sent from the central network control station in each beam so that the terminals in each downlink beam can use these pilots as references for antenna acquisition and tracking, as reliable frequency sources, and as indicators of signal fade for uplink power control (ULPC). The potential CDMA near-far problem due to uplink fades is mitigated by using ULPC. Quasi-burst mode transmission is used to minimize the potential of clock and pseudorandom number code synchronization.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114151903","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258229
R. Wilder
The author focuses on experiments and simulations designed to examine the difficulties in providing a fair communication service in an internet carrying traffic from the transport control protocol (TCP) and open systems interconnection (OSI) applications. Fairness between connections that compete for resources is a goal of congestion control schemes that have been developed for both protocol suites. The slow start congestion control mechanism is now fairly standard for TCP, and the DEC-bit approach to congestion avoidance is widely accepted for OSI networks with a connectionless network layer. Unfortunately, these two approaches have evolved independently and are not designed to provide fairness between protocol suites. The network experiments and simulations reported examined the extent of fairness problems to be expected in a mixed TCP/OSI environment and the effects of a simple router-based measure to limit unfairness between protocol suites.<>
{"title":"Fairness issues for mixed TCP/OSI internets","authors":"R. Wilder","doi":"10.1109/MILCOM.1991.258229","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258229","url":null,"abstract":"The author focuses on experiments and simulations designed to examine the difficulties in providing a fair communication service in an internet carrying traffic from the transport control protocol (TCP) and open systems interconnection (OSI) applications. Fairness between connections that compete for resources is a goal of congestion control schemes that have been developed for both protocol suites. The slow start congestion control mechanism is now fairly standard for TCP, and the DEC-bit approach to congestion avoidance is widely accepted for OSI networks with a connectionless network layer. Unfortunately, these two approaches have evolved independently and are not designed to provide fairness between protocol suites. The network experiments and simulations reported examined the extent of fairness problems to be expected in a mixed TCP/OSI environment and the effects of a simple router-based measure to limit unfairness between protocol suites.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114239727","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258355
L. Walker
The author identifies critical issues in meeting the communications requirements for distributed command and control and highlights the impact of failing to adequately satisfy this requirement. The seven critical issues presented in prioritized order of importance are detectability, availability, data rate, security, impact on mobility, skill for operation, and network management. The basic precept of distributed command and control is to enhance the survival of the command and control system.<>
{"title":"Critical communications issues for distributed command land control","authors":"L. Walker","doi":"10.1109/MILCOM.1991.258355","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258355","url":null,"abstract":"The author identifies critical issues in meeting the communications requirements for distributed command and control and highlights the impact of failing to adequately satisfy this requirement. The seven critical issues presented in prioritized order of importance are detectability, availability, data rate, security, impact on mobility, skill for operation, and network management. The basic precept of distributed command and control is to enhance the survival of the command and control system.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114708541","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258418
W. G. Hartung, F. Ogden, A. Moylan
It is pointed out that to fully utilize the benefits of automated writer-to-reader messaging to be provided by the Defense Message System (DMS) the Department of Defense (DoD) end users must be prepared to accept new responsibilities and adapt to a different, but user-friendly, way of doing business. In the evolution to the DMS, the DoD organizational and individual messaging users will make the transition to a common environment in which the functions currently centralized and performed by a large unseen cadre of communications experts will be automated and distributed. These end users will assume both more control over and responsibility for messaging. Thus, it is imperative that they learn, adapt, and become pro-active participants in the DMS implementation process. The baseline is described, and the three phases of the transition to the DMS are reviewed.<>
{"title":"The impact of automated writer-to-reader messaging on the DoD end user","authors":"W. G. Hartung, F. Ogden, A. Moylan","doi":"10.1109/MILCOM.1991.258418","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258418","url":null,"abstract":"It is pointed out that to fully utilize the benefits of automated writer-to-reader messaging to be provided by the Defense Message System (DMS) the Department of Defense (DoD) end users must be prepared to accept new responsibilities and adapt to a different, but user-friendly, way of doing business. In the evolution to the DMS, the DoD organizational and individual messaging users will make the transition to a common environment in which the functions currently centralized and performed by a large unseen cadre of communications experts will be automated and distributed. These end users will assume both more control over and responsibility for messaging. Thus, it is imperative that they learn, adapt, and become pro-active participants in the DMS implementation process. The baseline is described, and the three phases of the transition to the DMS are reviewed.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114570766","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258237
F. Kiel
With a deregulated multivendor situation with a strong request for integrated voice and data services on international corporate/private networks, network management based on Telecommunication Management Network principles has become a priority issue for the European carriers and large multinational enterprises. This trend is accompanied by numerous standardization activities and development of basic TMN products. The framework for TMN was set by the recommendation M.30 issued by CCITT, the major standardization body for TMN.<>
{"title":"Status and evolution of TMN in the European economy","authors":"F. Kiel","doi":"10.1109/MILCOM.1991.258237","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258237","url":null,"abstract":"With a deregulated multivendor situation with a strong request for integrated voice and data services on international corporate/private networks, network management based on Telecommunication Management Network principles has become a priority issue for the European carriers and large multinational enterprises. This trend is accompanied by numerous standardization activities and development of basic TMN products. The framework for TMN was set by the recommendation M.30 issued by CCITT, the major standardization body for TMN.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116586909","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258419
C. Kain, P.P. Buchynsky
It is noted that there has been increased activity recently in developing computer algorithms that can automatically reconstruct messages received over record communications systems. These algorithms exploit the redundancy available when either multiple copies are transmitted or the message is expanded in the phonetic alphabet. The authors describe the characteristics of the communications systems which provide the input sequences to, and which are likely to impact the design of, message reconstruction algorithms. They discuss the potential variability of the received sequences and describe, in some cases, when the use of certain techniques is not appropriate. Particular attention is given to error control, anomalies, and cross-channel correction.<>
{"title":"Message reconstruction design criteria","authors":"C. Kain, P.P. Buchynsky","doi":"10.1109/MILCOM.1991.258419","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258419","url":null,"abstract":"It is noted that there has been increased activity recently in developing computer algorithms that can automatically reconstruct messages received over record communications systems. These algorithms exploit the redundancy available when either multiple copies are transmitted or the message is expanded in the phonetic alphabet. The authors describe the characteristics of the communications systems which provide the input sequences to, and which are likely to impact the design of, message reconstruction algorithms. They discuss the potential variability of the received sequences and describe, in some cases, when the use of certain techniques is not appropriate. Particular attention is given to error control, anomalies, and cross-channel correction.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123150816","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}
Pub Date : 1991-11-04DOI: 10.1109/MILCOM.1991.258413
M. Rafter
The author discusses some of the issues associated with establishing a multimedia communications network architecture, primarily relying on the use of a multiparameter routing metric developed for use in the media resource controller program. Improvements to the previously published multi-media communications model (MMCM) are discussed and simulation performance results are presented.<>
{"title":"Architectural considerations for the improvement of multimedia communications network performance","authors":"M. Rafter","doi":"10.1109/MILCOM.1991.258413","DOIUrl":"https://doi.org/10.1109/MILCOM.1991.258413","url":null,"abstract":"The author discusses some of the issues associated with establishing a multimedia communications network architecture, primarily relying on the use of a multiparameter routing metric developed for use in the media resource controller program. Improvements to the previously published multi-media communications model (MMCM) are discussed and simulation performance results are presented.<<ETX>>","PeriodicalId":212388,"journal":{"name":"MILCOM 91 - Conference record","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129687807","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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