2008 Fourth International Conference on Wireless Communication and Sensor Networks最新文献_第3页

An equilateral triangular patch antenna with T - shaped notch for enhanced gain 一种带T形陷波以增强增益的等边三角形贴片天线

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772706

P. Tilanthe, P.C. Sharma

引用次数: 8

Performance analysis of OFDMA System with multiple data rate in Rayleigh fading channel 瑞利衰落信道下多数据率OFDMA系统性能分析

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772702

R. Susan, S. Pillai

引用次数: 2

Reconfigurable wireless sensor network node based on Nios core 基于Nios核心的可重构无线传感器网络节点

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772684

P. Muralidhar, C. Rao

引用次数: 31

GA, SA, and TS near-optimum multiuser detectors for s/MIMO MC-CDMA systems s/MIMO MC-CDMA系统的GA、SA和TS近最优多用户检测器

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772705

T. Abrão, F. Ciriaco, L. Oliveira, B. Angélico, P. Jeszensky, F. Casadevall

引用次数: 3

Multiple spreading codes based MAC protocol for wireless networks 基于多扩展码的无线网络MAC协议

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772709

G. S. Tomar, S. Verma, B. Chaurasia, Abinit Kumar

{"title":"Multiple spreading codes based MAC protocol for wireless networks","authors":"G. S. Tomar, S. Verma, B. Chaurasia, Abinit Kumar","doi":"10.1109/WCSN.2008.4772709","DOIUrl":"https://doi.org/10.1109/WCSN.2008.4772709","url":null,"abstract":"This paper presents a medium access protocol for spread spectrum networks. We have focus on the use of the protocol in MANETs to increase the throughput of the network. We focus on the use of the protocol in mobile ad-hoc networks (MANETs) to increase the throughput of the network. The existing IEEE 802.11 MAC protocol uses spread spectrum technique at the physical layer. However, it uses the same PN code for spreading all the transmitted signals. This makes it impossible for concurrent transmissions to occur in the vicinity of a receiver. We use multiple spreading codes at the physical layer to allow for the simultaneous interference-limited transmissions to take place in the vicinity of the receiver. A node gains information about ongoing transmissions in its neighborhood from the overheard control packets (RTS and CTS). Using this channel-gain information obtained from these transmissions, a node can estimate the required power for its data packets. This power control mechanism has been utilized to further enhance the gains from the use of multiple spreading codes at the physical layer. Simulation results indicate that the modified protocol is able to yield about 80% gain in the throughput.","PeriodicalId":338962,"journal":{"name":"2008 Fourth International Conference on Wireless Communication and Sensor Networks","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122460821","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

Reduced tree-search, heuristic and linear decoupler low-complexity MIMO detectors 简化树搜索，启发式和线性解耦低复杂度MIMO检测器

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772704

I. Suzuki, F. Ciriaco, T. Abrão, L.D. de Oliveira

引用次数: 1

Maximizing anonymity of a vehicle 最大化车辆的匿名性

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772689

B. Chaurasia, S. Verma, S.M. Bhasker

引用次数: 5

Traffic based clustering in wireless sensor network 无线传感器网络中基于流量的聚类

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772687

V. Chaurasiya, S. Kumar, S. Verma, G. Nandi

{"title":"Traffic based clustering in wireless sensor network","authors":"V. Chaurasiya, S. Kumar, S. Verma, G. Nandi","doi":"10.1109/WCSN.2008.4772687","DOIUrl":"https://doi.org/10.1109/WCSN.2008.4772687","url":null,"abstract":"To increase the lifetime and scalability of a wireless sensor network (WSN) it is necessary to have control over topology of the network. Dynamic clustering is one way for achieve the above defined objective. In this paper we are proposing a multi-level hierarchal clustering approach for WSN. Our proposed approach in this paper is to create a system which will adopt a topology (i.e. size of cluster and number of hierarchal level) in accordance with the traffic patterns and density of sensor nodes deployed in a given area of interest. Load on the cluster head near the base station will be more as compared to farther cluster heads as the proximity cluster head have to do the dual work of collecting data from its own cluster and also to forward (or relay) data from distant cluster heads. Therefore this situation may result in dying out of proximity cluster heads sooner than distant cluster heads. It will result in failure of network as a whole. In this situation a bottleneck will be created near the base station. In our approach, we are proposing an algorithm of hierarchical clustering with variable cluster size based on its distance from the base station. Variable cluster size is important for balancing inter-cluster and intra-cluster traffic.","PeriodicalId":338962,"journal":{"name":"2008 Fourth International Conference on Wireless Communication and Sensor Networks","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126170804","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

Message broadcast in VANETs using group signature 在vanet中使用组签名广播消息

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772697

B. Chaurasia, S. Verma, S.M. Bhasker

{"title":"Message broadcast in VANETs using group signature","authors":"B. Chaurasia, S. Verma, S.M. Bhasker","doi":"10.1109/WCSN.2008.4772697","DOIUrl":"https://doi.org/10.1109/WCSN.2008.4772697","url":null,"abstract":"In this paper, we study group signature scheme for privacy preservation of a continually transmitting mobile vehicle. A moving vehicle transmits and receives different types of messages on the road. Such communication is a threat to the privacy of a vehicle as its communication can be used to link its identity to its physical entity. The change of size and nature of the neighborhood of a moving vehicle changes as new vehicles come in its vicinity and old neighbors become distant. This change might warrant a pseudonym update for privacy preservation. Moreover, malicious vehicles may broadcast false messages in the network using the identity of other vehicles. This necessitates authentication of the broadcast in addition unlinkability of broadcast messages. Further, a vehicle should not be able to deny its communication, if warranted by law. Thus, a vehicle should be able to broadcast non repudiable, non replicable messages while remaining anonymous. To achieve these conflicting goals of privacy and non-repudiation, group signature schemes along with pseudonyms have been proposed. Group Signature schemes provide security, anonymity to the broadcast, and traceability as required in a VANET. The present work focuses on existing group signature schemes to verify their effectiveness and overheads. Moreover, a scheme to combine pseudonyms and group signature scheme has been proposed to enhance the effectiveness and efficiency of group signatures in VANETs.","PeriodicalId":338962,"journal":{"name":"2008 Fourth International Conference on Wireless Communication and Sensor Networks","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114726864","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: 60

A joint packet coding and attaching scheme for wireless networks 无线网络的联合分组编码和附加方案

2008 Fourth International Conference on Wireless Communication and Sensor Networks Pub Date : 2008-12-01 DOI: 10.1109/WCSN.2008.4772715

M. Orang, I. Keivanloo, A. Movaghar

{"title":"A joint packet coding and attaching scheme for wireless networks","authors":"M. Orang, I. Keivanloo, A. Movaghar","doi":"10.1109/WCSN.2008.4772715","DOIUrl":"https://doi.org/10.1109/WCSN.2008.4772715","url":null,"abstract":"Network coding is realized to have great potential for improving throughput limitation of current multi-hop wireless networks. Existing network coding schemes (e.g. COPE) find coding opportunities and use them in forwarding multiple packets, which are coded together, in a single transmission, and consequently, they achieve several fold increase in the throughput of wireless networks. In this paper, we propose CAPO, a new protocol for multi-hop wireless networks, which do attaching packets in addition to coding them. CAPO has an attaching module which attaches non-encoded packets together opportunistically. We show in this paper that CAPO can convey more packets in a single transmission than COPE using this module. In addition, it has a lazy decoding process which tries to decode stored coded packets, whenever it is needed, to increase the decoding probability leading to reduction in the number of retransmissions using the minimum number of decodings. Furthermore, we compare our lazy decoding process with the one in XOR-Top which is proactive and show that the number of decodings done by our lazy decoding process is much less than XOR-Top lazy process. In this paper, we show that CAPO with its opportunistic attaching and lazy decoding feature reduces the number of transmissions noticeably, in comparison with COPE.","PeriodicalId":338962,"journal":{"name":"2008 Fourth International Conference on Wireless Communication and Sensor Networks","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124528069","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