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SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications最新文献

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Distance education as a way to meet the challenges of the XXI century 远程教育是迎接21世纪挑战的一种方式
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249112
Malgorzata Nycz, Barbara Smok
{"title":"Distance education as a way to meet the challenges of the XXI century","authors":"Malgorzata Nycz, Barbara Smok","doi":"10.1109/TIC.2003.1249112","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249112","url":null,"abstract":"Fast economic progress generates for societies the necessity of quickly learning new skills and, in consequence, the need for permanent education. The paper deals with some challenges in education as a result of globalization in today's world. It presents the organization of distance education, knowledge delivery problems, as well as the advantages, especially for countries such as those in Central Europe, where the need for new, well-educated workers is still growing.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123611514","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
An efficient algorithm for estimating the state sequence of a finite state machine given an output sequence 给定输出序列的有限状态机状态序列估计的一种有效算法
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249101
S. Baggen, V. Balakirsky, S. Egner
{"title":"An efficient algorithm for estimating the state sequence of a finite state machine given an output sequence","authors":"S. Baggen, V. Balakirsky, S. Egner","doi":"10.1109/TIC.2003.1249101","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249101","url":null,"abstract":"We consider the problem of sequentially estimating the states of non-unifilar finite state machines on the basis of the output symbols of the machine and show that a Fano-type inequality can be effectively used as a stopping criterion. Lower and upper bounds on the decoding error probability are given.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129685133","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
Image transmission using unequal error protection combined with two-fold turbo coding 采用不等误码保护与二次turbo编码相结合的图像传输
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249073
C. Tanriover, B. Honary
{"title":"Image transmission using unequal error protection combined with two-fold turbo coding","authors":"C. Tanriover, B. Honary","doi":"10.1109/TIC.2003.1249073","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249073","url":null,"abstract":"Two-fold turbo codes have recently been introduced as the least complex member of the multifold turbo code family, and they have been shown to outperform their conventional symmetric and asymmetric cousins in the waterfall region. The article introduces a simple method that allows two-fold turbo codes to offer bilevel unequal error protection. Also, the application of the unequal error protection to a still image coding technique, i.e. hue-saturation-luminance coding, is explained and the pixel error performance results under Gaussian conditions are presented. According to the simulation results, the proposed scheme outperforms its conventional counterpart by up to 0.7 dB. Furthermore, with the new unequal error protection coding scheme, under certain channel conditions, significant savings in decoder iterations are achieved, without compromising the received image quality. Although the unequal error protection is limited to bilevel within the scope of this article, the same technique can be used to provide multilevel error protection.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121297838","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
Constraint-based path selection for new SLA acceptance 用于新SLA接受的基于约束的路径选择
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249091
S. Krile
{"title":"Constraint-based path selection for new SLA acceptance","authors":"S. Krile","doi":"10.1109/TIC.2003.1249091","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249091","url":null,"abstract":"We need very effective traffic engineering tools to obtain quantitative end-to-end QoS guarantees in the DiffServ/MPLS network architecture, especially for dynamic service invocation. Through a negotiation process, the network operator (ISP) has to check if the new SLA can be accepted because of limited capacity resources on the path and existing traffic demands. For end-to-end congestion control with N quality of service levels (classes), an efficient heuristic algorithm is developed. For constraint-based path selection, an effective algorithm of the BFH type is used. The heuristic algorithm is compared with an algorithm based on an exact approach. In all numerical test-examples, the best possible result is achieved, but with significant computation savings.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123324929","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
Power-line high-frequency characteristics: analytical formulation 电力线高频特性:解析式
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249100
N. Suljanovic, A. Mujčić, M. Zajc, J. Tasic
{"title":"Power-line high-frequency characteristics: analytical formulation","authors":"N. Suljanovic, A. Mujčić, M. Zajc, J. Tasic","doi":"10.1109/TIC.2003.1249100","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249100","url":null,"abstract":"The design of digital communication systems via overhead high voltage power-lines, namely digital power line carrier (dPLC), requires knowledge of the power-line high frequency characteristics. The paper derives an analytical formulation for high-voltage power-line high-frequency characteristics: amplitude and phase characteristics and group delay. Analytical expressions are derived for a power-line with three conductors in horizontal disposition and middle phase to ground coupling. These characteristics can be obtained numerically. On the other hand, the analytical description provides the nature of the media.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"61 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127148725","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
Reputation methods for routing security for mobile ad hoc networks 移动自组织网络路由安全的信誉方法
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249106
P. Yau, Chris J. Mitchell
{"title":"Reputation methods for routing security for mobile ad hoc networks","authors":"P. Yau, Chris J. Mitchell","doi":"10.1109/TIC.2003.1249106","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249106","url":null,"abstract":"Mobile ad hoc networks have inherently very different properties to conventional networks. These new characteristics present major security vulnerabilities; in particular, one side effect of the unique way in which routing protocols operate in ad hoc networks is that many new threats arise. Selfish nodes are those which do not perform certain operations that the protocol specifies that they should, through a wish to conserve power. Malicious nodes may deliberately disrupt the network using a variety of attacks. The paper discusses reputation mechanisms which have been suggested as a means to mitigate the detrimental effect of selfish and malicious nodes. The paper reveals reasons why complex reputation systems may be too inefficient to use in a mobile ad hoc network, where resources are limited. However, suggestions are also made to show how a simple reputation system might be used to enhance the robustness of ad hoc networks.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132788993","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
Load-balancing using autonomous co-operating nodes 使用自主协作节点进行负载平衡
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249109
T. Koutny, J. Safarík
{"title":"Load-balancing using autonomous co-operating nodes","authors":"T. Koutny, J. Safarík","doi":"10.1109/TIC.2003.1249109","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249109","url":null,"abstract":"The existing distributed environments are well suited for time-consuming applications enabling a de-centralized processing. Approaches like active networks and other programmable network designs open the way for new techniques of distributed computing. One of the problems still needed to be addressed is balancing. The paper addresses the specification of the future environment for distributed computing and the need for load-balancing. The structure of the network node is proposed.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130468066","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
Fading characteristics for indoor wireless channels at 5 GHz unlicensed bands 5ghz无牌频段室内无线信道的衰落特性
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249099
M. Carroll, T. Wysocki
{"title":"Fading characteristics for indoor wireless channels at 5 GHz unlicensed bands","authors":"M. Carroll, T. Wysocki","doi":"10.1109/TIC.2003.1249099","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249099","url":null,"abstract":"The paper reports on experiments undertaken at the University of Wollongong to characterise fading profiles of indoor wireless channels at the 5 GHz bands. The measurements were undertaken at different locations around the campus with results recorded for post-processing to calculate the Rician k-factor, the level crossing rate and the average fade duration.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125018816","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: 28
Digital building block for frequency synthesizer and fractional phase locked loops 数字模块频率合成器和分数锁相环
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249105
M. Stork
{"title":"Digital building block for frequency synthesizer and fractional phase locked loops","authors":"M. Stork","doi":"10.1109/TIC.2003.1249105","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249105","url":null,"abstract":"The paper describes a new architecture of a digital building block, which can be used in frequency synthesizers and phase locked loops. The circuit is based on generators, counters and a register. The technique described here is much simpler then other methods. The presented synthesizer is the most suitable for the design of VLSI architectures or for programmable large scale integration (or in-system programmable large scale integration). One of the main advantages is stability and pure digital structure. On the other hand, this synthesizer has a disadvantage in its low output frequency, but this can be overcome by using it together with a phase locked loop.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123983204","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
Reconfigurability support for dynamic spectrum allocation: from the DSA concept to implementation 支持动态频谱分配的可重构性:从DSA概念到实现
SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications Pub Date : 2003-12-03 DOI: 10.1109/TIC.2003.1249076
D. Grandblaise, K. Moessner, P. Leaves, D. Bourse
{"title":"Reconfigurability support for dynamic spectrum allocation: from the DSA concept to implementation","authors":"D. Grandblaise, K. Moessner, P. Leaves, D. Bourse","doi":"10.1109/TIC.2003.1249076","DOIUrl":"https://doi.org/10.1109/TIC.2003.1249076","url":null,"abstract":"The paper presents current research into the area of dynamic spectrum allocation (DSA) in the context of a reconfigurable multi-radio environment. First, the DSA concept is introduced. Then, some possible deployment scenarios for DSA are presented. Based on these scenarios, some high level DSA requirements on reconfigurability are outlined from different perspectives (technical, economic and regulatory) investigating different areas (system, equipment). Two extreme architecture approaches, combining both DSA and reconfigurability, are illustrated. Finally, we review some of the current technologies (with emphasis on SDR) enabling the support of DSA. This activity is ongoing and some more mature results are expected regarding the identification of future research needs in reconfigurability.","PeriodicalId":177770,"journal":{"name":"SympoTIC'03. Joint 1st Workshop on Mobile Future and Symposium on Trends in Communications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126798039","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
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