2010 Sixth Advanced International Conference on Telecommunications最新文献_第5页

Improving Performance of on Demand Multicast Routing by Deleting Lost Join Query Packets 通过删除丢失的Join查询报文提高按需组播路由的性能

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.84

K. Abdollahi, A. Shafigh, A. Kassler

{"title":"Improving Performance of on Demand Multicast Routing by Deleting Lost Join Query Packets","authors":"K. Abdollahi, A. Shafigh, A. Kassler","doi":"10.1109/AICT.2010.84","DOIUrl":"https://doi.org/10.1109/AICT.2010.84","url":null,"abstract":"A Mobile ad hoc network is a collection of wireless nodes that dynamically organize themselves to form a network without the need for any fixed infrastructure or centralized administration. The network topology dynamically changes frequently in an unpredictable manner since nodes are free to move. Support for multicasting is essential in such environment as it is considered to be an efficient way to deliver information from source nodes to many client nodes. A problem with multicast routing algorithms is their efficiency as their forwarding structure determines the overall network resource consumption makes them significantly less efficient than unicast routing algorithms. In this research, we improve the performance of the popular ODMRP multicast routing protocol by restricting the domain of join query packets, which have been lost. This is achieved by augmenting the join query packets with minimum extra information (one field), which denotes the number of the visited node from previous forwarding group. Simulation results show, that our mechanisms significantly reduce the control traffic and thus the overall latency and power consumption in the network.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121680955","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

A Service Discovery Protocol for Emergency Response Operations Using Mobile Ad Hoc Networks 基于移动自组织网络的应急响应操作服务发现协议

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.19

M. Serhani, Y. Gadallah

{"title":"A Service Discovery Protocol for Emergency Response Operations Using Mobile Ad Hoc Networks","authors":"M. Serhani, Y. Gadallah","doi":"10.1109/AICT.2010.19","DOIUrl":"https://doi.org/10.1109/AICT.2010.19","url":null,"abstract":"Many disaster recovery and military operations require the frequent movement of specialized personnel and equipment from one operations zone to another. Technology can play a significant role in facilitating resource organization and movements to where the need arises. In this study, we adopt the concept of service discovery in mobile ad hoc networks (MANET) and adapt it to the nature of such operations. For this purpose, we introduce a novel MANET service discovery and reservation technique that is tailored to support such environments and operations. In these situations, the network is often established hastily and the communication devices are of low computational and bandwidth capabilities. The nature of service is rather unique in the sense that a service provider is required to physically move to the location of need. A service provider is often able to service only one requestor over a period of time. The proposed technique functions as a service-oriented routing protocol that locates the resource on the basis of service levels and requirements. We evaluate the technique using a simulator that we developed specifically for this purpose. The evaluation results show the high success rate of the technique in locating and reserving services with changing operational conditions such as network density and rate of requests.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116054129","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

Resource Allocation Method for OFDM System to Transmit SVC over Frequency Selective Channel OFDM系统在选频信道上传输SVC的资源分配方法

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.35

Daeyeon Kim, T. Fujii, Kye-san Lee

{"title":"Resource Allocation Method for OFDM System to Transmit SVC over Frequency Selective Channel","authors":"Daeyeon Kim, T. Fujii, Kye-san Lee","doi":"10.1109/AICT.2010.35","DOIUrl":"https://doi.org/10.1109/AICT.2010.35","url":null,"abstract":"Orthogonal frequency division multiplexing provides frequency diversity gain when assuming frequency selective channel which happens in most cases of wireless mobile communications. The frequency diversity can be utilized by considering data which requires unequal protection. Video data coded by scalable video coding method is an example. The video coding method encodes a certain picture period termed as group of pictures into a bit stream which can be divided into one or more decodable units. The unit is called as video layer. However the decodability of each video layer is dependent on existence of other video layers in the same bit stream. The dependency causes priority of the layer. This paper proposes a method to improve video transmission performance by adaptively providing radio resources according to the priority of the layers and also by controlling the number of the layers according to channel condition. The proposed method actives only useful subchannels and adaptively applies modulation level to the active subchannels. In the simulation, the proposed system showed 4 to 5 dB improvement in terms of channel quality, compared to a single carrier system.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116902563","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

Towards a New Generation of Virtual Campuses 迈向新一代虚拟校园

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.34

Antonio Navarro, Jesus Cristobal, Alfredo Fernández-Valmayor, C. Fernández-Chamizo, Héctor Hernanz, Salvador Guillomía, F. Buendía

引用次数: 11

A Preemptive Time-Threshold Based Multi-Guard Bandwidth Allocation Scheme for Cellular Networks 一种基于抢占时间阈值的蜂窝网络多保护带宽分配方案

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.17

I. Candan

引用次数: 2

A Low Complexity PAR Reduction Technique Using Cyclic Shifted Data Sequences in DS-CDMA Signals DS-CDMA信号中基于循环移位数据序列的低复杂度PAR降低技术

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.54

T. Helaly, R. Dansereau, M. El-Tanany

{"title":"A Low Complexity PAR Reduction Technique Using Cyclic Shifted Data Sequences in DS-CDMA Signals","authors":"T. Helaly, R. Dansereau, M. El-Tanany","doi":"10.1109/AICT.2010.54","DOIUrl":"https://doi.org/10.1109/AICT.2010.54","url":null,"abstract":"Downlink direct sequence-code division multiple access signals have a large dynamic range causing these signals to be distorted by the nonlinear characteristics of the high power amplifier. The signal dynamic range is often characterized by peak-to-average ratio (PAR). Several techniques have been proposed to minimize such forms of distortion by reducing PAR such as partial transmit sequences and selected mapping (SLM), where several representations of the same signal are generated and the one with the minimum PAR is selected for transmission. Such techniques remarkably improve the system performance, but at the expense of an increased system complexity and computational burden. In this paper, we present a low complexity technique to reduce PAR based on cyclic shifts of the users’ data sequences (namely CSS). The search and optimization procedure in the proposed CSS technique is also simplified by adopting a greedy algorithm that selects the best representation sequentially as new users are added to the system. Comparison of the presented technique against SLM shows comparable improvement in terms of PAR reduction and bit error performance but with remarkable complexity reduction.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116014197","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

Performance Evaluation of Cognitive Management Functionality for Emergency Healthcare Applications 急诊医疗应用中认知管理功能的性能评价

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.98

G. Dimitrakopoulos, Marios Logothetis, P. Demestichas

{"title":"Performance Evaluation of Cognitive Management Functionality for Emergency Healthcare Applications","authors":"G. Dimitrakopoulos, Marios Logothetis, P. Demestichas","doi":"10.1109/AICT.2010.98","DOIUrl":"https://doi.org/10.1109/AICT.2010.98","url":null,"abstract":"Enormous advances in medical sciences are depicted on their capability to approach previously past-cure diseases, as well as prevent the appearance and evolution of unpleasant situations. Those advances are often derived from interdisciplinary solutions to complex medical problems, supported by communications and electronics, which target fast, reliable and stable solutions to problems that are demanding in terms of velocity and accuracy. Recent findings in the world of wireless communications, such as the systems beyond the third generation (B3G), as well as the utilization of knowledge and experience by means of cognitive networking principles, can be efficiently exploited, in order to support electronic healthcare, especially in emergency situations. The goal of this paper is to present intelligent management functionality based on cognitive, B3G communication systems, capable of supporting emergency, electronic healthcare applications. Simulation results using the Network Simulator-2 (NS-2) are used for evaluating the performance of the proposed functionality. Results show a significant increase in the dependability and the efficiency of medical applications when supported by cognitive wireless networks.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126245826","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: 6

Automatic Signature Generation for Network Services through Selective Extraction of Anomalous Contents 通过选择性抽取异常内容自动生成网络服务签名

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.22

P. García-Teodoro, Pablo Muñoz-Feldstedt, David Ruete-Zúñiga

引用次数: 4

MS-DFGA : Malleable Scheduling with Dynamic MaxFlow and Greedy Algorithms in Grid Networks 网格网络中具有动态MaxFlow和贪心算法的可伸缩调度

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.68

A. Hamdi, Lynda Zitoune, V. Vèque

{"title":"MS-DFGA : Malleable Scheduling with Dynamic MaxFlow and Greedy Algorithms in Grid Networks","authors":"A. Hamdi, Lynda Zitoune, V. Vèque","doi":"10.1109/AICT.2010.68","DOIUrl":"https://doi.org/10.1109/AICT.2010.68","url":null,"abstract":"In this paper, we present a new approach to schedule malleable requests over grid computing networks. The proposed solution called MS-DFGA (emph{MS-DFGA: Malleable Scheduling with Dynamic MaxFlow and Greedy Algorithms}) aims at maximizing the network utilization while increasing the requests acceptance ratio. We have adapted Multi-constrained Knapsacks Problem (MKP) to the malleable requests scheduling, and propose a solution to resolve it. MS-DFGA is performed in two steps. The first step corresponds to the computation of the candidate paths over the network using a Dynamic MaxFlow algorithm. The second step concerns the malleable requests scheduling over these paths. The paths represent the knapsacks, and the requests correspond to the items of the MKP problem. Also, we present an implementation of our solution as a new simulator framework which we have developed in a JAVA environment. Moreover, simulation results illustrate the efficiency of our scheduling method to: provide guarantees for critical grid traffics with timely execution requirements, avoid bandwidth wastage when the temporal constraints are too close and hence reducing the blocking ratio.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131905949","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

How the Atmospheric Variables Affect to the WLAN Datalink Layer Parameters 大气变量对WLAN数据链路层参数的影响

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.15

D. Bri, S. Sendra, H. Coll, J. Mauri

引用次数: 16