2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)最新文献

CAVIAR - a visualization tool to enable emergency management CAVIAR -一个可视化工具，使应急管理

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464718

A. Vaidyanathan, M. Billinghurst, H. Sirisena

{"title":"CAVIAR - a visualization tool to enable emergency management","authors":"A. Vaidyanathan, M. Billinghurst, H. Sirisena","doi":"10.1109/ATNAC.2009.5464718","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464718","url":null,"abstract":"The telephone network of a leading services provider in New Zealand is profiled for calls made on mobile phones in order to establish a set of macro and micro level information about various entities including users (the population carrying the phone), fixed resources (such as cell phone towers, which are the backbone of communication) and traffic density across the geographical expanse of a city on normal days and the days of special events. Our tool, CAVIAR, also motivates the need for varying levels of detail in the information established in order to enable fast and efficient emergency management. The management of emergencies has necessitated a wide field of research into warning systems, first response mechanisms and effective mitigation of the disasters. The taxonomy of emergencies can vary depending on the severity, scale and nature of the emergency.. Depending on the nature of the emergency, the tools that are used to manage the emergency vary. We argue that the most ubiquitous sensor that can be used across the continuum of emergency detection, warning, response and mitigation is the common cell phone, simply because of its proliferation and availability. The features of the cell phone render that it a viable sensor include providing location information, being a highly prolific device and being a two-way communication channel where both the user can call in for help and emergency managers can contact civilians for information.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124850384","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

On network traffic concentration and updating interval for proactive recovery method against large-scale network failures 大规模网络故障主动恢复方法的网络流量集中与更新间隔研究

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464910

Takuro Horie, G. Hasegawa, S. Kamei, M. Murata

{"title":"On network traffic concentration and updating interval for proactive recovery method against large-scale network failures","authors":"Takuro Horie, G. Hasegawa, S. Kamei, M. Murata","doi":"10.1109/ATNAC.2009.5464910","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464910","url":null,"abstract":"Proactive recovery methods from network failures, based on multiple routing configurations, are effective for quick failure recovery, as compared with reactive recovery methods. However, there are two major problems, especially when we consider recovering from large-scale network failures: updating interval for recalculation of routing configurations against network growth, and network traffic concentration on specific nodes and links after recovering failures. In this paper, we first propose a light-weight and distributed algorithm for updating routing configurations when new nodes and links join the network, which does not need overall recalculation. We then evaluate the proactive recovery method for large-scale network failures, with proposed algorithm from the viewpoint of above two problems. Through numerical evaluation results, we find that to maintain the recovery performance, we should recalculate the routing configurations when the network grows by roughly 5–10%. We also present that the degree of network traffic concentration decreases when we employ a hop-by-hop selection mechanism of routing configuration.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122213463","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

Performance evaluation of next generation WiMedia UWB system 下一代WiMedia超宽带系统性能评价

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464777

Jee-Hoon Kim, Jeong-Chul Shin, Hyoung-Kyu Song

引用次数: 2

MF-TCP : Design and evaluation of TCP for message ferry delay tolerant networks MF-TCP:用于消息传递容忍延迟网络的TCP的设计和评估

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464900

Dheeraj Kandula, P. Pathak, R. Dutta

引用次数: 1

Iterative MIMO-OFDM detection under nonlinear channel distortions 非线性信道畸变下的MIMO-OFDM迭代检测

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464959

X. Gui

引用次数: 3

Analysis of network connectivity: Wildlife and Sensor Network 网络连通性分析:野生动物和传感器网络

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464822

S. Sivaramakrishnan, A. Al-Anbuky

{"title":"Analysis of network connectivity: Wildlife and Sensor Network","authors":"S. Sivaramakrishnan, A. Al-Anbuky","doi":"10.1109/ATNAC.2009.5464822","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464822","url":null,"abstract":"Connectivity Maintenance for mobile nodes is an important issue in Ad-hoc Wireless Sensor Network application like Wildlife Monitoring wherein data needs to be constantly captured and analysed to track and study animals. The random nature of the animal movement makes the task of tracking quite challenging. The work presented here attempts at addressing and analysing the issue of node connectivity as the network situation changes from dense to sparse and vice versa. Here we are looking at establishing Hand-Off to provide connectivity via next hop nodes and analyse its effect on the duration of connectivity. This is done by determining the transmitting radius of the nodes for maximum coverage, based on the maximum velocity of the animal carrying the node. To over-come the problem of network holes formed due to dynamically varying node densities in the network, we establish an adaptive and energy efficient sampling scheme. Preliminary modelling results reflects that the duration of connectivity hyperbolically reduces with reduction in the overlap of mobile and receiving node, and that the mobile node is able to quickly adapt itself by predicting the values for the next hop node with a small number of sample inputs.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114585775","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: 12

The analytical method of Genetic Algorithm -Aided Iterative Joint Channel Estimation and Multi-User Detection 遗传算法辅助迭代联合信道估计与多用户检测的分析方法

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464821

Jean-Baptiste Yamtndi, Wu Mu-qing

{"title":"The analytical method of Genetic Algorithm -Aided Iterative Joint Channel Estimation and Multi-User Detection","authors":"Jean-Baptiste Yamtndi, Wu Mu-qing","doi":"10.1109/ATNAC.2009.5464821","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464821","url":null,"abstract":"This is a recent research on Space-Division-Multiple-Access-Orthogonal frequency Division Multiplexing (SDMA-OFDM) for channel estimation based on iterative joint channel estimation and a new Genetic Algorithm (GA). Assisted iterative joint channel estimation and Multi-User Detection (MUD) is the most recent approach for MTMO SDMA-OFDM systems and GA-aided MUD techniques for providing the best capacity of “soft” outputs of the Generic Algorithm. These are the key technology in wireless communication. The main focus of this research is based on the Uniform Cross-over technique used for mutating the symbol chromosomes to obtain an initial Frequency Domain-CHannel Transfer Function (FD-CHTF). Based on the analysis of the Genetic Algorithm -Aided Iterative Joint Channel Estimation and Multi-User Detection (GA-JCEMUD) on individual-based or population-based on soft output single application an increase in number of users is obtained couple with resolve in the Multi-User Interference through perturbation technique in the SDMA-OFDM system. Finally, a range of simulation results are provided to demonstrate the improvement of the performance.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127795147","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

A new cooperative communication for orthogonal frequency and code division multiple access 一种新型的正交频码分多址协同通信

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464961

Jung-In Baik, Jee-Hoon Kim, Jin-Hyuk Song, Yu-Jin Song, Hyoung-Kyu Song

引用次数: 1

Estimation by cross-correlation of the number of nodes in underwater networks 水下网络中节点数的互相关估计

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464716

M. Anower, M. Frater, M. Ryan

引用次数: 34

A transport layer approach for improving interactive user experience on thin clients 一种传输层方法，用于改善瘦客户机上的交互式用户体验

2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464897

Yukio Ogawa, G. Hasegawa, M. Murata

{"title":"A transport layer approach for improving interactive user experience on thin clients","authors":"Yukio Ogawa, G. Hasegawa, M. Murata","doi":"10.1109/ATNAC.2009.5464897","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464897","url":null,"abstract":"Return network traffic (from servers to clients) in thin-client systems is modeled as a mixture of interactive data flows corresponding to keystrokes and bulk data flows related to screen updates. Users are very sensitive to delay and jitter of the former flows. Thus our goal is to minimize the latency of interactive data transfer without increasing latency of bulk data transfer. Through simulation experiments, we determine that the main factors causing end-to-end delay in the interactive data transfer are queuing delay in the router and buffering delay in the server. When we apply two techniques: priority queuing of interactive data flows at the router and using TCP SACK option, the average end-to-end delay can be reduced. However, several servers could take more than a second to send large bulk data flows; this delays the transmission of following interactive data flows. We then develop TCP optimization mechanisms: modifying recalculation of the retransmission timeout value and temporarily turning off the TCP SACK control, and demonstrate that they can overcome the negative effects of the existing techniques.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130979328","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