2008 Fourth Advanced International Conference on Telecommunications最新文献_第3页

User Profile Selection by Means of Ontology Reasoning 基于本体推理的用户配置文件选择

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.47

Michael Sutterer, O. Drögehorn, K. David

引用次数: 20

Overlay Topology Based Inter-domain Qos Paths Building 基于覆盖拓扑的域间Qos路径构建

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.83

S. Obreja, E. Borcoci

引用次数: 5

Simplification of Frequency Test for Random Number Generation Based on Chi-Square 基于卡方的随机数生成频率检验的简化

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.42

Kruawan Wongpanya, K. Sripimanwat, K. Jenjerapongvej

{"title":"Simplification of Frequency Test for Random Number Generation Based on Chi-Square","authors":"Kruawan Wongpanya, K. Sripimanwat, K. Jenjerapongvej","doi":"10.1109/AICT.2008.42","DOIUrl":"https://doi.org/10.1109/AICT.2008.42","url":null,"abstract":"This paper presents the simplified method of random test suite based on the frequency (block) test. The test is used to check the first property of random numbers which is to have the same probabilities of being \"1\" and \"0\". Random numbers are used for the secret key generation which is an essential part for cryptographic system. Before encryption, secret keys need to pass the random test in order to make it harder for outsiders to predict the pattern of the secret keys. Basically, the decision making of whether the secret keys are truly random, is based on the test statistics computation. Due to the motivation that the classical method based on the NIST statistical test suite (NIST STS) is complex and redundant, the reduction of this random testing procedure is then proposed. The introduced technique does not need to compute the incomplete gamma function (Igamc) nor the P-value for the decision making of test results unlike that of the classical method. Thus, it results to the reduction in the testing decision time. In this technique, the decision making and conclusion can be determined from the critical value of chi-square (chi2) directly. Its results without having to compute Igamc is compared to that of the classical method. In the test, the significance level (a) is set to be 0.01 or 0.05 in order to obtain the critical values and the critical regions. Resulting to the confidence of 99% or 95% respectively. Next, overall performance is evaluated by computing the percentage difference in order to demonstrate that the proposed value gives the same result as that of the classical method. Therefore, this proposed technique can be applied as that of the conventional based on the frequency (block) test.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127595777","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

Capacity of Cellular Uplink with Multiple Tiers of Users and Path Loss 具有多层用户的蜂窝上行链路容量和路径损耗

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.49

D. Kaltakis, E. Katranaras, M. Imran, C. Tzaras

{"title":"Capacity of Cellular Uplink with Multiple Tiers of Users and Path Loss","authors":"D. Kaltakis, E. Katranaras, M. Imran, C. Tzaras","doi":"10.1109/AICT.2008.49","DOIUrl":"https://doi.org/10.1109/AICT.2008.49","url":null,"abstract":"With the emergence and continuous growth of wireless data services, the value of a wireless network is not only defined by how many users it can support, but also by its ability to deliver higher data rates. Information theoretic capacity of cellular systems with fading is usually estimate.d using models originally inspired by Wyner's gaussian cellular multiple access channel (GCMAC). In this paper we extend this model to study the cellular system with users distributed over the cellular coverage area. Based on the distance from the cell-site receiver, users are grouped as tiers, and received signals from each tier are scaled using a distance dependent attenuation factor. The optimum capacity in fading environment is then found by calculating the path-loss for users in each tier using a specific path-loss law and some interesting insights are derived. The results correspond to a more realistic model which boils down to Wyner's model with fading, with appropriate substitutions of parameter values. The results are verified using Wyner's model with fading and Monte-Carlo simulations. Insights are provided for the real world scenarios.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129113789","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

Less Faulty and Simpler Statistical Prediction of Sun-Synchronous Polar LEO Satellite Visions for Ground Stations 太阳同步极LEO卫星视像地面站统计预测误差小、简化

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.23

A. Modiri, L. Mohammady, N. Molanian

引用次数: 3

Improving Performance of Finite-Buffered Blocking Delta Networks with 2-Class Priority Routing through Asymmetric-Sized Buffer Queues 通过非对称大小的缓冲队列改进2类优先级路由的有限缓冲阻塞增量网络的性能

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.13

D. C. Vasiliadis, G. Rizos, C. Vassilakis

引用次数: 10

Topology Design of Hierarchical Hybrid Fiber-VDSL Access Networks with ACO 基于蚁群算法的分层光纤- vdsl混合接入网拓扑设计

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.60

R. Zhao, Hanjie Liu, R. Lehnert

引用次数: 11

Thermal Noise Effect in FTTH Communication Systems 光纤到户通信系统中的热噪声效应

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.71

M. Ab-Rahman, M. F. Ibrahim, Ashrani Aizzuddin Abd. Rahni

引用次数: 15

Clock Drift Estimation in Networks with Symmetric Exponential Link Delays 对称指数链路延迟网络中的时钟漂移估计

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.82

Q. Chaudhari, E. Serpedin

引用次数: 3

Performance Validation of Carrier Super-Positioning Satellite System with Multi-component Code 多分量码载波超定位卫星系统性能验证

2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.73

Shoko Kuroda, T. Hara, M. Okada

{"title":"Performance Validation of Carrier Super-Positioning Satellite System with Multi-component Code","authors":"Shoko Kuroda, T. Hara, M. Okada","doi":"10.1109/AICT.2008.73","DOIUrl":"https://doi.org/10.1109/AICT.2008.73","url":null,"abstract":"The carrier super-positioning satellite system is a promising telecommunication system because the frequency efficiency is double that of existing satellite systems. In this technique, we use the same frequency band for inbound and outbound signals that is currently used in separated bands. So, we need to cancel the undesired signal and pick up the desired signal from the received signal to implement this system. Our research group has proposed some methods for signal canceling over the last several years. This time, we focus on a distance measuring method for a signal canceller using multi-component code (MCC) and validate its precision for distance measuring. We evaluated the usability of MCC in the case in which actually modulated signal is added to MCC with higher power than MCC. According to the results of simulation and theoretical validation, the longer the time required for distance measurement, the smaller the error probability of the calculation for measurement. And it is observed that the MCC method works well in the actual environment of satellite networks that suffer from severe interference and level variation.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"06 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129070511","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