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Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications最新文献

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A multiplexing method in consideration of cell delay variation 一种考虑小区时延变化的多路复用方法
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368780
H. Ishida, H. Inoue, Y. Shiraishi
{"title":"A multiplexing method in consideration of cell delay variation","authors":"H. Ishida, H. Inoue, Y. Shiraishi","doi":"10.1109/ICC.1994.368780","DOIUrl":"https://doi.org/10.1109/ICC.1994.368780","url":null,"abstract":"In ATM networks, generally, cell delay variation occurs between users and network nodes. This cell delay variation may cause cell clumping in a cell stream sent normally from users, so that some cells may exceed the peak rate. These cells are discarded as the cell violating the peak rate by usage parameter control on the network node. As a result, a considerable quantity of cells will be lost. To avoid this problem, the method that extends the narrowed cell interval to the peak interval by a spacer (or a shaper) has been proposed. However, this method has a drawback that cell delays increase because of extending the cell interval by force. The authors propose a multiplexing method to make up the drawback. They show that this method can suppress the cell delay variation which may cause cell clumping exceeding the peak rate. As a result, they show that the quantity of cell delays can be reduced because the spacer decreases in frequency in use.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116627844","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
Dynamic program modification in the non-stop software extensible system (NOSES) 不间断软件扩展系统(nose)中的动态程序修改
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368729
A. Okamoto, H. Sunaga, K. Koyanagi
{"title":"Dynamic program modification in the non-stop software extensible system (NOSES)","authors":"A. Okamoto, H. Sunaga, K. Koyanagi","doi":"10.1109/ICC.1994.368729","DOIUrl":"https://doi.org/10.1109/ICC.1994.368729","url":null,"abstract":"This paper presents a mechanism for partially modifying programs written in a high-level language without interrupting service of a switching or communication system. This mechanism is developed as a part of our plan for establishing the non-stop software extensible system (NOSES). This dynamic program modification method covers 100% of bug fixes and most minor feature additions. By considering the relationship of the modification mechanism and the characteristics of the modified program, we clarify conditions for preventing inconsistencies. We also examine the off-line system, the on-line OS kernel, and simple operation interface. Our mechanism is expected to be used widely in switching or communications systems.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127130834","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: 16
On diversity combining for correlated slowly flat-fading Rayleigh channels 相关慢平衰落瑞利信道的分集组合
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.369033
E. Perahia, G. Pottie
{"title":"On diversity combining for correlated slowly flat-fading Rayleigh channels","authors":"E. Perahia, G. Pottie","doi":"10.1109/ICC.1994.369033","DOIUrl":"https://doi.org/10.1109/ICC.1994.369033","url":null,"abstract":"Presents exact and approximate analytical expressions for the error probabilities for communications systems with PSK and non-coherent FSK modulation schemes. The authors model their system with correlated, flat-fading Rayleigh channels with additive white Gaussian noise. The solutions hold for M-ary signaling, L-order diversity, and a correlation of /spl rho/.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125058860","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: 17
Improved quality of protocol testing through techniques of experimental design 通过实验设计技术提高方案测试的质量
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368821
Kirk Allan Burroughs, A. Jain, R. L. Erickson
{"title":"Improved quality of protocol testing through techniques of experimental design","authors":"Kirk Allan Burroughs, A. Jain, R. L. Erickson","doi":"10.1109/ICC.1994.368821","DOIUrl":"https://doi.org/10.1109/ICC.1994.368821","url":null,"abstract":"This paper describes how both the quality and efficiency of protocol testing were improved by using a new Bellcore tool called the Automatic Efficient Test Generator (AETG). The AETG tool is based on ideas from experimental design and it creates a test set that contains all possible pairs of involved factors. Two examples are given to illustrate this technique and compare it with traditional approaches. The improved quality of testing leads to a faster detection of nonconformances and a higher quality of products in a shorter development interval. Although the application discussed in this paper covers protocol conformance testing, the techniques for improving the quality of testing can be applied to other types of testing such as feature testing and testing between two different network elements.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125103352","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: 85
Unequal error protection for digital mobile DS-CDMA radio systems 数字移动DS-CDMA无线电系统的不等错误保护
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368905
P. Hoeher
{"title":"Unequal error protection for digital mobile DS-CDMA radio systems","authors":"P. Hoeher","doi":"10.1109/ICC.1994.368905","DOIUrl":"https://doi.org/10.1109/ICC.1994.368905","url":null,"abstract":"Unequal error protection (UEP) is investigated for coded direct-sequence code-division multiple access (DS-CDMA) mobile radio systems. The UEP techniques considered include (i) different channel code rates, (ii) different number of chips/symbol, and (iii) different symbol energies. Analytical approximations of the bit error rate (BER) in correlated Rayleigh fading are presented taking carrier phase synchronization into account. Binary PSK modulation with pilot-symbol-aided coherent detection and binary DPSK modulation with differential detection are considered. Both schemes are candidates for an asynchronous up-link, which is the critical link. Technique (i) has advantages in fast fading, otherwise technique (ii) is recommended. Technique (iii), although basically identical with technique (ii), is likely to suffer from side effects.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126722957","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: 7
Reception of multiple co-channel digital signals using antenna arrays with applications to PCS 使用天线阵列接收多个同信道数字信号的应用
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368813
S. Talwar, A. Paulraj, M. Viberg
{"title":"Reception of multiple co-channel digital signals using antenna arrays with applications to PCS","authors":"S. Talwar, A. Paulraj, M. Viberg","doi":"10.1109/ICC.1994.368813","DOIUrl":"https://doi.org/10.1109/ICC.1994.368813","url":null,"abstract":"Antenna arrays can be used to increase system capacity in PCS networks by supporting multiple co-channel users per cell in receive and in transmit. We propose a novel approach for separating multiple digital signals received at an antenna array. Our approach exploits the temporal structure of digital signals to simultaneously determine the array response and the symbol sequence for each signal. Uniqueness of the estimates is established for signals with BPSK modulation format. This approach for separating digital signals is applicable to an unknown array geometry and propagation environment, which is particularly useful in PCS applications. Simulation results are presented to demonstrate the performance of this new technique.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126735223","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: 17
Enhanced channel coding using source criteria in speech coders 在语音编码器中使用源标准的增强信道编码
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368839
L. K. Ong, A. Kondoz, B. Evans
{"title":"Enhanced channel coding using source criteria in speech coders","authors":"L. K. Ong, A. Kondoz, B. Evans","doi":"10.1109/ICC.1994.368839","DOIUrl":"https://doi.org/10.1109/ICC.1994.368839","url":null,"abstract":"Spectral efficiency is deemed highly desirable in many digital voice communication systems. This has largely been achieved by using bit reduced representations of speech signals through advanced speech coding techniques. Transmission errors pose a threat to the quality of voice service in these systems. Forward error correction (FEC) coding techniques is often used to curb the effects of channel impairments, but the performance is limited to bandwidth limitations. This can result in a rapid decline of the speech quality as the effects of the channel impairments increase. We describe a technique for further improving the FEC performance without additional spectral requirements.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116125051","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
Computer based optimization techniques for the design of HDSL 基于计算机的HDSL设计优化技术
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368809
S. Ahamed
{"title":"Computer based optimization techniques for the design of HDSL","authors":"S. Ahamed","doi":"10.1109/ICC.1994.368809","DOIUrl":"https://doi.org/10.1109/ICC.1994.368809","url":null,"abstract":"The design and optimization of the high-speed digital subscriber line (HDSL) need powerful computational strategies. Traditional techniques of distributing poles and zeros on Smith charts generally do not work. In the past, such approaches have lead to suboptimal designs for applications where the data capacity sought is considerably less than the Shanon capacity of the lines. Typical subscriber loops are less than perfect and for the current demands on the HDSL at T1/T2 and E1 rates every possible venue for the HDSL design need to be investigated, if not exploited. The authors present flexible computational techniques that explore and optimize system components in view of operating environment of the HDSL and/or the asymmetric digital subscriber line (ADSL), and the inherent limitations of the system components. The optimization occurs automatically by forcing the computer to track the effects of incremental changes of the subsystem performance (e.g. echo cancelers or equalizers), or the component values (R's and C's in the matching circuits) in context of the functional constraints of the line (HDSL, ADSL, duplex, dual-duplex, triplex, etc.) in conjunction with the subscriber loop (CSA, Loops <18 kft., American, Australian, European, ANSI, ETSI, etc.) environments.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122392563","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
Nonblocking multi-channel switching in ATM networks ATM网络中的无阻塞多通道交换
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368981
H. Saidi, P. S. Min, M. Hegde
{"title":"Nonblocking multi-channel switching in ATM networks","authors":"H. Saidi, P. S. Min, M. Hegde","doi":"10.1109/ICC.1994.368981","DOIUrl":"https://doi.org/10.1109/ICC.1994.368981","url":null,"abstract":"Multi-channel switches have been proposed and studied in the literature as a means of alleviating the processing speed constraint of electronic switches. Multi-channel switches can provide higher performance (e.g., throughput, cell loss probability, delay) by exploiting the concept of channel grouping. Instead of being routed to a specific output channel, a cell is routed to any channel belonging to an appropriate channel group which may be defined as a collection of channels transmitted over a single optical fiber. The main goal of the paper is to develop a switching paradigm that accomplishes multichannel switching as a generalization of single-channel switching paradigms that are currently prevalent. The resulting architecture must maintain the required features of single-channel switching (such as multicasting, and simplicity in hardware) while providing the advantages of multichannel switching (such as multi-rate and super-rate switching, and higher performance).<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122596170","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
A comparative study of some leaky bucket network access schemes 几种漏桶网络接入方案的比较研究
Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI: 10.1109/ICC.1994.368763
X. Wu, I. Lambadaris, H. Lee, A. Kaye
{"title":"A comparative study of some leaky bucket network access schemes","authors":"X. Wu, I. Lambadaris, H. Lee, A. Kaye","doi":"10.1109/ICC.1994.368763","DOIUrl":"https://doi.org/10.1109/ICC.1994.368763","url":null,"abstract":"In order to regulate the traffic flow and achieve the best use of ATM network resources, appropriate access control is implemented to prevent the network from performance degradation due to congestion. The authors provide a comparative study of certain leaky bucket access schemes. The models include combinations of adaptive, selective cell marking and priority mechanisms. Comparisons and concluding remarks are based on simulations.<<ETX>>","PeriodicalId":112111,"journal":{"name":"Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications","volume":"18 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114059553","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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