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A distributed trust and reputation model for capacity enhancement in wireless networks 一种用于无线网络容量增强的分布式信任和声誉模型
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812860
G. Sawma, J. Demerjian, I. Aib, G. Pujolle
{"title":"A distributed trust and reputation model for capacity enhancement in wireless networks","authors":"G. Sawma, J. Demerjian, I. Aib, G. Pujolle","doi":"10.1109/WD.2008.4812860","DOIUrl":"https://doi.org/10.1109/WD.2008.4812860","url":null,"abstract":"In order to enhance resource allocation in wireless local area networks, it is important to properly distribute the load from the overloaded access points (APs) over their neighbors. Nevertheless, malicious APs may strategically alter their behavior for concealing malicious behavior and prompting their reputation. Therefore, it is important to evaluate APs' trustworthiness. In this paper, we propose a trusted model based on an autonomic load management algorithm (ALMA) that ensure the accommodation of more user traffic and an overall network capacity improvement, by evaluating and detecting the malicious APs. Initially each APs is assigned a trust level. Using these trust levels as a guide, the source AP can then select a neighbor AP that meets the security requirements. Simulations, using VoIP traffic, show that, the performance gain in term of call blocking rate is improved by using the trust-based approach.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115805031","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
Decoding architectures for Projective Geometry based LDPC codes 基于投影几何的LDPC码的解码结构
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812880
G. HariharaS., M. Chandra, Tarakapraveen Uppalapati, B. S. Adiga
{"title":"Decoding architectures for Projective Geometry based LDPC codes","authors":"G. HariharaS., M. Chandra, Tarakapraveen Uppalapati, B. S. Adiga","doi":"10.1109/WD.2008.4812880","DOIUrl":"https://doi.org/10.1109/WD.2008.4812880","url":null,"abstract":"Projective geometry (PG) based low density parity check (LDPC) codes have many useful properties, including easy encoding and decoding by simple majority logic technique. With these useful features, they can be useful error control codes in future. In this paper, we present three novel architectures comprising of one parallel and two semi-parallel decoder architectures for popular PG-based LDPC codes. These architectures have no memory clash and further are reconfigurable for different lengths (and their corresponding rates). The three architectures can be configured either for the regular belief propagation based decoding or majority logic decoding (MLD).","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116807256","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
Impulsive noise characterization at source 源处脉冲噪声特性
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812851
M. Tlich, Hassina Chaouche, A. Zeddam, F. Gauthier
{"title":"Impulsive noise characterization at source","authors":"M. Tlich, Hassina Chaouche, A. Zeddam, F. Gauthier","doi":"10.1109/WD.2008.4812851","DOIUrl":"https://doi.org/10.1109/WD.2008.4812851","url":null,"abstract":"The noise characteristics of an indoor powerline network strongly influence the link capability to achieve high data rates. The appliances shared with PLC modems in the same powerline network generate noises, among them the impulsive ones which are the main source of interference which causes signal distortions leading to bit errors while data transmission. Many models were proposed in the literature. They shared the same impulsive noise definition: \"unpredictable noises measured in the receiver side\". Authors are, consequently, confronted to model thousands of impulsive noises whose plurality would very likely come from the diversity of paths that the original impulsive noise took. In this paper, an innovative modelisation approach is applied to impulsive noises which are henceforth studied directly at their sources outputs. Noise at receiver would be simply the noise model at source filtered by powerline channel block.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129142377","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
A periodic refreshment method for resource reservation in Mobile Ad-hoc Networks 移动自组网中资源预留的周期性刷新方法
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812842
Rafael Paoliello-Guimarães, Llorenç Cerdà-Alabern
{"title":"A periodic refreshment method for resource reservation in Mobile Ad-hoc Networks","authors":"Rafael Paoliello-Guimarães, Llorenç Cerdà-Alabern","doi":"10.1109/WD.2008.4812842","DOIUrl":"https://doi.org/10.1109/WD.2008.4812842","url":null,"abstract":"Achieving quality of service (QoS) in mobile adhoc networks (MANETs) has been a research topic in the last years. A few papers, however deal with resource reservation, and a very small fraction of them study the impact of mobility. In this paper we describe a QoS reservation mechanism for multirate MANETs that allows bandwidth allocation on a per flow basis. By multirate we refer to those networks where wireless nodes are able to dynamically switch among several link rates. We show that, using periodic refreshment of ongoing QoS reservations, our scheme is adaptive to network topology changes due to node mobility.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130179778","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
CPICH power planning for optimizing HSDPA and R99 SHO performance: Mathematical modelling and solution approach 优化HSDPA和R99 SHO性能的CPICH功率规划:数学建模和解决方法
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812831
Lei Chen, D. Yuan
{"title":"CPICH power planning for optimizing HSDPA and R99 SHO performance: Mathematical modelling and solution approach","authors":"Lei Chen, D. Yuan","doi":"10.1109/WD.2008.4812831","DOIUrl":"https://doi.org/10.1109/WD.2008.4812831","url":null,"abstract":"We present and demonstrate mathematical modelling and optimization algorithm for enhancing HSDPA performance by automatically linking Common Pilot Channel (CPICH) power to HSDPA transmit power. Our approach uses non-uniformly allocated CPICH power and focuses on HSDPA performance with the side constraint of R99 soft handover. Solving the mathematical model gives the optimal CPICH allocation for small networks. The optimization algorithm demonstrates itself very time efficient in dealing with large scale networks which might have hundreds of cells and tens of thousands of users. A case study of realistic network planning scenario for Berlin shows significant CPICH power saving and HSDPA performance improvement.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122040341","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
Performance evaluation of LS algorithm in both Training-Based and Semi-Blind channel estimations for MIMO Systems 基于训练和半盲信道估计的LS算法在MIMO系统中的性能评价
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812848
S. Moghaddam, H. Saremi
{"title":"Performance evaluation of LS algorithm in both Training-Based and Semi-Blind channel estimations for MIMO Systems","authors":"S. Moghaddam, H. Saremi","doi":"10.1109/WD.2008.4812848","DOIUrl":"https://doi.org/10.1109/WD.2008.4812848","url":null,"abstract":"There are many algorithms that can be used in a channel estimator. In this investigation, performance of LS algorithm in a training-based as well as a semi-blind channel estimation evaluated and their results has been compared. Simulation results show that performance of a semi-blind estimator is better than a training-based estimator. It is interesting for us due to transmitting less required training bits than a training-based algorithm and hence lower redundancy. Therefore we will achieve more bandwidth efficiency with better performance. Training-based method needs 100 times more additional bits than semi-blind method whereas semi-blind method needs only 25% more computational time to convergence.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123557915","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
Testbed performance analysis of cross-layer based service discovery in Wireless Mesh Networks 无线Mesh网络中基于跨层服务发现的试验台性能分析
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812885
Martin Krebs, Sumedha Widyadharma, Karl-Heinz Krempels
{"title":"Testbed performance analysis of cross-layer based service discovery in Wireless Mesh Networks","authors":"Martin Krebs, Sumedha Widyadharma, Karl-Heinz Krempels","doi":"10.1109/WD.2008.4812885","DOIUrl":"https://doi.org/10.1109/WD.2008.4812885","url":null,"abstract":"In this paper we investigate and evaluate two cross-layer based service discovery protocols for wireless mesh networks. For both protocols we provide a testbed implementation and analyze the feasibility for real world usage. For the class of proactive protocols we encapsulate DNS based service discovery messages in a new message type for the optimized link state routing (OLSR) protocol. For the class of reactive protocols we introduce new message types for the dynamic MANET on demand routing (DYMO) protocol which discovers service and corresponding route in one message. As our results from a testbed show, some modifications have to be made before those protocols are really usable. With our results we deliver optimizations which make those protocols efficient under real conditions.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"146 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113991604","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
A bi-directional connectivity framework for Mobile ad hoc network and the internet 移动自组网和互联网的双向连接框架
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812871
K. Khan, R. Zaman, A. V. Reddy
{"title":"A bi-directional connectivity framework for Mobile ad hoc network and the internet","authors":"K. Khan, R. Zaman, A. V. Reddy","doi":"10.1109/WD.2008.4812871","DOIUrl":"https://doi.org/10.1109/WD.2008.4812871","url":null,"abstract":"The next generation mobile communication systems will be based on Infrastructure wireless LAN technologies like cellular and ad hoc networks. Such hybrid networks benefit the extension of infrastructure network coverage using Ad Hoc connectivity apart from offering the ad hoc nodes access to the resources of the Wired/Infrastructure networks. In most of the integration strategies Mobile IP is integrated with the Ad Hoc network routing protocol to provide Internet access. In few of the strategies the routing protocol has been enhanced to provide the connectivity without using Mobile IP. In this paper, an extended DSDV protocol, named as Efficient DSDV (Eff-DSDV) protocol has been used to provide full duplex connectivity between exclusive ad hoc hosts and the hosts on the wired network. The strategy does not take into account the visiting mobile nodes of the infrastructure network, to join the ad hoc network and access the wired network resources. The proposed framework uses one of the ad hoc hosts known as Mobile Gateway Node (MGN) to act as a bridge between ad hoc network and the wired network. The performance comparison is made between the proposed approach and the other existing strategies based on packet delivery ratio, end-end delay, control overhead. The experimental results indicate that the performance of the proposed strategy is better than the existing strategies.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130412754","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
On the development of a Multi-tier, Multimodal Wireless Sensor Network for wild life monitoring 用于野生动物监测的多层、多模态无线传感器网络的开发
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812899
C. Lopes, L. B. Ruiz
{"title":"On the development of a Multi-tier, Multimodal Wireless Sensor Network for wild life monitoring","authors":"C. Lopes, L. B. Ruiz","doi":"10.1109/WD.2008.4812899","DOIUrl":"https://doi.org/10.1109/WD.2008.4812899","url":null,"abstract":"Brazilian forests and Savannas have a rich biodiversity that still needs to be known, monitored and protected. Distributed sensing tools such as the wireless sensor networks are a natural solution. These networks have evolved quickly in recent years leading to specializations such as wireless visual sensor networks and wireless multi-tier, multimodal sensor networks, sensor networks distributed over several tier, using more than one sensing modality. This work presents the design and implementation of a multi-tier, multimodal application employing infrared and visual sensors to environmental monitoring in remote areas. A prototype using commercial off-the-shelf nodes and sensors is also implemented and some experiments are performed.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130466099","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
Energy-aware routing in Mobile Ad-Hoc Networks 移动Ad-Hoc网络中的能量感知路由
2008 1st IFIP Wireless Days Pub Date : 2008-11-01 DOI: 10.1109/WD.2008.4812884
Murali Parameswaran, K. Rakesh, C. Hota, Antti Ylä-Jääski
{"title":"Energy-aware routing in Mobile Ad-Hoc Networks","authors":"Murali Parameswaran, K. Rakesh, C. Hota, Antti Ylä-Jääski","doi":"10.1109/WD.2008.4812884","DOIUrl":"https://doi.org/10.1109/WD.2008.4812884","url":null,"abstract":"The next generation communication systems will provide high quality multimedia services in a flexible and efficient manner. As an extension of next generation networks, Mobile Ad Hoc Networks (MANETs) have attracted significant attention amongst researchers. Nodes in a MANET have limited battery power. Hence, ad hoc routing protocols ought to be energy conservative to support real-time multimedia services. In this paper, we propose a proactive routing protocol which gives better performance and satisfies the basic power aware parameters like minimum energy consumption per packet, maximum network lifetime, and minimum variance in the node power levels. We use breadth first search to gather the network topology.. From this global information, a least cost path is generated using Dijkstra's shortest path algorithm. This least cost path has better battery resources and is refreshed after some fixed intervals of data packet delivery to keep the variance in residual battery power to minimum. Our simulation results show that the proposed protocol provides good service to different types of media while conserving energy.","PeriodicalId":247938,"journal":{"name":"2008 1st IFIP Wireless Days","volume":"328 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131581447","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: 10
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