IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference最新文献_第6页

Theoretical Lower Bound for UWB TDOA Positioning 超宽带TDOA定位的理论下界

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.780

Jun Xu, M. Ma, C. Law

引用次数: 17

Collaborative Image Transmissions Based on Region and Path Diversity in Wireless Sensor Network 基于区域和路径分集的无线传感器网络协同图像传输

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.187

Honggang Wang, D. Peng, Wei Wang, H. Sharif

引用次数: 14

A Secure Time Synchronization Scheme for Heterogeneous Sensor Networks 异构传感器网络的安全时间同步方案

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.975

Xiaojiang Du, M. Guizani, Yang Xiao, Hsiao-Hwa Chen

引用次数: 2

A MAC Protocol with Directional Antennas for Deafness Avoidance in Ad Hoc Networks 一种用于Ad Hoc网络避聋的定向天线MAC协议

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.121

M. Takata, M. Bandai, Takashi Watanabe

{"title":"A MAC Protocol with Directional Antennas for Deafness Avoidance in Ad Hoc Networks","authors":"M. Takata, M. Bandai, Takashi Watanabe","doi":"10.1109/GLOCOM.2007.121","DOIUrl":"https://doi.org/10.1109/GLOCOM.2007.121","url":null,"abstract":"Directional antennas are expected to provide significant improvements over omni-directional antennas in wireless ad hoc networks. Directional MAC protocols, however, introduce new kinds of problems arising from directivity. One major problem is deafness, caused by a lack of state information from neighbor nodes (i.e., idle or busy). This paper proposes DMAC/DA (Directional MAC with Deafness Avoidance) to overcome the deafness problem. In DMAC/DA, WTS (Wait To Send) frames are transmitted by the transmitter and the receiver after the successful exchange of directional RTS (Request To Send) and CTS (Clear To Send) to notify the on-going communication to potential transmitters that may experience deafness. Furthermore, DMAC/DA is enhanced by the next packet notification to distinguish transmitters from neighbors. We evaluate our protocol through extensive simulation study with different values of parameters such as the number of flows, data size and beamwidth. The experimental results show that DMAC/DA outperforms existing directional MAC protocols, such as DMAC (Directional MAC) and MDA (MAC protocol for Directional Antennas), in terms of throughput, RTS failure ratio, and control overhead.","PeriodicalId":370937,"journal":{"name":"IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126280541","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: 62

Jitter Investigation and Performance Evaluation of a Small-Scale Probe Storage Device Prototype 一种小型探针存储装置样机的抖动研究与性能评价

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.61

A. Sebastian, A. Pantazi, H. Pozidis

引用次数: 19

Interworking Wireless Mesh Networks: Performance Characterization and Perspectives 互联无线网状网络:性能表征和前景

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.919

Tsai-Wei Wu, Hung-Yun Hsieh

{"title":"Interworking Wireless Mesh Networks: Performance Characterization and Perspectives","authors":"Tsai-Wei Wu, Hung-Yun Hsieh","doi":"10.1109/GLOCOM.2007.919","DOIUrl":"https://doi.org/10.1109/GLOCOM.2007.919","url":null,"abstract":"In this paper, we consider multi-mode, multi-radio wireless mesh networks and investigate the impact when multiple wireless mesh networks overlap in service area. We formulate the problem of resource sharing as a network optimization problem, and present a general LP (linear programming) formulation for modeling the problem. We first find that in a system with multiple wireless mesh networks in overlap, individual mesh networks could suffer from capacity degradation if no form of inter-domain coordination is present. Therefore, it is desirable to \"interwork\" these wireless mesh networks by allowing inter-domain traffic relay through provisioning of \"bridge\" nodes. If bridge nodes are chosen arbitrarily without any careful planning, however, serious inefficiency and unfairness problem may result. We use the proposed LP formulation to show the impact of bridge node selection and performance tradeoffs between throughput unfairness and network capacity when interworking multiple wireless mesh networks. Based on simulation results, we conclude that if proper interworking is provided, significant performance gain can be obtained for overlapping wireless mesh networks.","PeriodicalId":370937,"journal":{"name":"IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128159550","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: 21

Utility-Optimal Power Control in Wireless Sensor Networks 无线传感器网络中的效用最优功率控制

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.259

Zongkai Yang, Shengbin Liao, Wei Liu, W. Cheng, Zhiqiang Xiong

引用次数: 1

Channel Interference in IEEE 802.11b Systems IEEE 802.11b系统中的信道干扰

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.171

Pan Li, N. Scalabrino, Yuguang Fang, E. Gregori, I. Chlamtac

引用次数: 25

A 2-Approximation Double-Tree Algorithm for Correlated Data Gathering in Wireless Sensor Networks 无线传感器网络中相关数据采集的2-逼近双树算法

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.173

Hsien-Cheng Weng, Hope Chan, E. Wu, Gen-Huey Chen

{"title":"A 2-Approximation Double-Tree Algorithm for Correlated Data Gathering in Wireless Sensor Networks","authors":"Hsien-Cheng Weng, Hope Chan, E. Wu, Gen-Huey Chen","doi":"10.1109/GLOCOM.2007.173","DOIUrl":"https://doi.org/10.1109/GLOCOM.2007.173","url":null,"abstract":"In this paper, we design a novel transmission structure called a double-tree for correlated data gathering problem for wireless sensor networks, where the goal is to minimize the total transmission cost of information collected by all sensor nodes, to the sink node. It is well-known that a tree structure is often adopted for network routing problems. However, the traditional tree transmission structure for network routing may not be an optimal structure while data correlation factors are being considered. For a given wireless sensor network, some nodes send their raw data directly to the sink, and some nodes send their encoded data based on information received from other nodes; therefore, there are two types of data in the network. Without the help of decoding/re-coding at the intermediate node, the purpose of encoded data routing is to directly send to the sink, but the purpose of raw data routing is not only to send to the sink, but also to spread raw data to other nodes as side information in encoding operations. The difference from one data type makes traditional tree structure unsuitable for the correlated data gathering problem. Therefore according to our observations, we propose a new transmission double-tree structure, which uses one tree for raw data routing, and uses another tree for encoded data routing. By employing the double-tree structure, the network can achieve lower transmission cost of gathering sensing data. Furthermore the adoption of double-tree structure always outperforms the traditional tree structure in correlated data gathering problem. We first formulate the optimization problem with a double-tree transmission structure in the general case, and prove NP-Hardness of simplified version of this problem. Then we present a 2-approximation algorithm MST+SPT that guarantees the upper bound of total transmission cost compared to the optimal solution.","PeriodicalId":370937,"journal":{"name":"IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121940850","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: 8

A Spectrally Efficient Transmission Scheme for Half-Duplex Decode-and-Forward Relaying 半双工译码转发中继的频谱高效传输方案

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.320

M. N. Khormuji, E. Larsson

引用次数: 2