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Interference mitigation in WiFi networks using multi-sector antennas 多扇区天线在WiFi网络中的干扰缓解
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614313
Henrik Lundgren, A. Subramanian, T. Salonidis, Marianna Carrera, P. L. Guyadec
{"title":"Interference mitigation in WiFi networks using multi-sector antennas","authors":"Henrik Lundgren, A. Subramanian, T. Salonidis, Marianna Carrera, P. L. Guyadec","doi":"10.1145/1614293.1614313","DOIUrl":"https://doi.org/10.1145/1614293.1614313","url":null,"abstract":"Sectorized antennas provide an attractive solution to increase wireless network capacity through interference mitigation. Despite their increasing popularity, the real-world performance characteristics of such antennas in dense wireless mesh networks are not well understood. We demonstrate our multi-sector antenna prototypes and their performance through video streaming over an indoor wireless network in the presence of interfering nodes. We use our graphical tool to vary the sender, receiver, and interferer antenna configurations and the resulting performance is directly visible in the video quality displayed at the receiver.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131833003","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 slicing scheme for efficient use of wireless testbeds 一种有效利用无线试验台的切片新方案
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614311
Angelos-Christos G. Anadiotis, A. Apostolaras, D. Syrivelis, T. Korakis, L. Tassiulas, Luis Rodriguez, M. Ott
{"title":"A new slicing scheme for efficient use of wireless testbeds","authors":"Angelos-Christos G. Anadiotis, A. Apostolaras, D. Syrivelis, T. Korakis, L. Tassiulas, Luis Rodriguez, M. Ott","doi":"10.1145/1614293.1614311","DOIUrl":"https://doi.org/10.1145/1614293.1614311","url":null,"abstract":"The gradually growing need for testbed use so as networking algorithms to be validated in real environments, has given rise to optimal utilization of testbed resources. Despite the fact that, many laboratories around the globe have deployed testbeds, so as experimenters have the opportunity to test their algorithms, the majority of those testbeds suffer from bad management that prevents users from efficiently exploiting testbed's resources. Moreover, as the number of testbed users increases, experimenters needs for more sophisticated allocation of testbed resources are growing. Toward, this direction, we propose a managerial framework that exploits testbed utilization by introducing slicing over frequency spectrum. This new framework will allow a more sophisticated way to optimally control and manage network resources of a testbed. Lab's website: http://nitlab.inf.uth.gr","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117003396","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: 19
Mobility emulator for DTN and MANET applications 用于DTN和MANET应用的移动性模拟器
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614303
Hayoung Yoon, JongWon Kim, M. Ott, T. Rakotoarivelo
{"title":"Mobility emulator for DTN and MANET applications","authors":"Hayoung Yoon, JongWon Kim, M. Ott, T. Rakotoarivelo","doi":"10.1145/1614293.1614303","DOIUrl":"https://doi.org/10.1145/1614293.1614303","url":null,"abstract":"Repeatable experiments to study the performance or behavior of wireless mobile adhoc network (MANET) systems such as a delay (or disruption) tolerant network (DTN) are challenging tasks. One approach to do this is to build a realistic mobile testbed, on which the mobile devices and test applications or network protocols can be deployed. This testbed approach, however, often results in expensive management and setup costs. Therefore, most of algorithms and applications considering device mobility as a critical parameter have been tested using trace-based analysis and computer simulations. However, these evaluation methods are not sufficient to reflect various natures of mobile wireless networks. This paper presents the design and implementation of an On/Off-based mobility emulation method, which virtually migrates applications over a static-grid testbed to mimic the device mobility. This emulation method assists DTN and MANET developers to evaluate their work in repeatable ways on the lab-scale static-grid testbed. Through extensive experimental analysis and a case study using two different testbeds, we show that the proposed emulation method can successfully recreate important characteristics of mobility trace data, such as contact and inter-contact time distributions.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116015635","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: 18
Friendly clustering: the winning strategy of the maniac challenge 2009 友好集群:2009狂魔挑战赛的制胜策略
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614317
F. Juraschek, Heiko Will, M. Günes, J. Schiller
{"title":"Friendly clustering: the winning strategy of the maniac challenge 2009","authors":"F. Juraschek, Heiko Will, M. Günes, J. Schiller","doi":"10.1145/1614293.1614317","DOIUrl":"https://doi.org/10.1145/1614293.1614317","url":null,"abstract":"We intend to demonstrate our strategy Friendly Clustering which was designed and implemented for the MANIAC Challenge. The MANIAC Challenge is a competition to develop cooperation strategies for mobile ad-hoc networks (MANETs). MANETs usually comprise battery-powered nodes which may act selfishly by dropping packets destined to other network nodes in order to save energy. The detection of such behavior is important to exclude these nodes from the forwarding decision to minimize packet loss. For the demo, the strategy will compete against different variants of selfish and uncooperative behavior in a MANIAC competition round carried out on the DES-Testbed at the Freie Universitaet Berlin. Friendly Clustering won the Performance Award in the MANIAC Challenge 2009.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115664033","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
Demonstration of distributed TDMA MAC protocol implementation with OLSR on linux enriched WARP 利用OLSR在linux上实现分布式TDMA MAC协议的演示
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614312
Hannu Tuomivaara, M. Raustia, Markku Jokinen
{"title":"Demonstration of distributed TDMA MAC protocol implementation with OLSR on linux enriched WARP","authors":"Hannu Tuomivaara, M. Raustia, Markku Jokinen","doi":"10.1145/1614293.1614312","DOIUrl":"https://doi.org/10.1145/1614293.1614312","url":null,"abstract":"In this demo we present software extension for the Wireless open Access Research Platform (WARP), named as Linux Enriched WARP (LE-WARP). The objective of the LE-WARP is twofold. First, to make the WARP more independent from external systems, e.g., need for external PC to be part of the WARP's network layer. This is achieved by introducing Linux OS to the platform. The second objective is to utilize a secondary network for coordinated statistics gathering from the WARPs. To demonstrate these features of LE-WARP, a prototype implementation consisting of distributed Time Division Multiple Access (TDMA) based MAC protocol with distributed time synchronization algorithm and the Optimized Link State Routing (OLSR) protocol for ad hoc networks is presented. The demonstration highlights the LE-WARP's ability to monitor the multihop test network consisting four nodes while utilizing the presented prototype implementation.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115557711","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
TLQAP: a topology and link quality assessment protocol for efficient node allocation on wireless testbeds TLQAP:无线测试平台上有效节点分配的拓扑和链路质量评估协议
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614299
D. Syrivelis, Angelos-Christos G. Anadiotis, A. Apostolaras, T. Korakis, L. Tassiulas
{"title":"TLQAP: a topology and link quality assessment protocol for efficient node allocation on wireless testbeds","authors":"D. Syrivelis, Angelos-Christos G. Anadiotis, A. Apostolaras, T. Korakis, L. Tassiulas","doi":"10.1145/1614293.1614299","DOIUrl":"https://doi.org/10.1145/1614293.1614299","url":null,"abstract":"In this paper we present Topology and Link Quality Assessment Protocol (TLQAP), which we have implemented as a wireless testbed management framework component, that is used to inspect link quality between wireless testbed nodes and appropriately map them to user experiment requirements. TLQAP is mainly an OSI layer 2 design for fixed location, non RF-isolated wireless testbed deployments, which assesses interconnection topology and link quality by estimating packet delivery ratio (PDR) and transmission delay at each node for all requested channel, rate and transmission power combinations. Moreover, TLQAP builds a measurement history log and creates a channel utilization profile, in the context of each testbed node, for all the nearby testbed-external devices that operate independently in the region and are not under the management framework control. The analysis of this information enables TLQAP to choose the channels that have the highest probability of being free during an experiment. TLQAP OSI layer 2 component has been implemented in the click modular router framework and the controller component has been integrated with OMF management framework for wireless testbeds. To outline TLQAP benefits, we have performed experiments on our ORBIT node testbed and we compare it to an existing application level measuring tool.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115959067","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
OLSR and Net-X as a framework for channel assignment experiments: extended abstract OLSR和Net-X作为信道分配实验的框架:扩展摘要
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614308
M. Castro, P. Dely, A. Kassler, F. D'Elia, S. Avallone
{"title":"OLSR and Net-X as a framework for channel assignment experiments: extended abstract","authors":"M. Castro, P. Dely, A. Kassler, F. D'Elia, S. Avallone","doi":"10.1145/1614293.1614308","DOIUrl":"https://doi.org/10.1145/1614293.1614308","url":null,"abstract":"We present a software framework for channel assingment and routing experiments in multi-channel/multi-radio wireless mesh networks. Based on a plug-in architecture we develop a traffic demand-aware channel assignment algorithm. The evaluation in KAUMesh -- an experimental multi-radio mesh network -- shows around 30% throughput improvement with respect to a traffic un-aware channel assignment scheme.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116824994","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
A measurement study of zigbee-based indoor localization systems under RF interference 射频干扰下基于zigbee的室内定位系统测量研究
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614300
S. Lau, Tsung-Han Lin, Te-Yuan Huang, I-Hei Ng, Polly Huang
{"title":"A measurement study of zigbee-based indoor localization systems under RF interference","authors":"S. Lau, Tsung-Han Lin, Te-Yuan Huang, I-Hei Ng, Polly Huang","doi":"10.1145/1614293.1614300","DOIUrl":"https://doi.org/10.1145/1614293.1614300","url":null,"abstract":"With an expected market value of 2.71 billion in 2016, supporting daily use of real-time location systems in households and commercial buildings is an increasingly important subject of study. A growing problem in providing robust indoor location estimations in real time is the use of wireless transmissions in RF frequencies. Having implemented a simple RSSI-signature-based location system on a 24-node IEEE 802.15.4-based sensor network testbed, we are able to analyze the effect of background IEEE 802.11 traffic on localization error. The measurement results demonstrate that the 80th-percentile of the localization error may increase by 141% at worst in an office building with active use of IEEE 802.11 for data. Such performance degradation results from RSSI reading loss as the beacon messages collide with background traffic.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"21 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133451615","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: 53
Reconfigurable framework for adaptive OFDM transmission 自适应OFDM传输的可重构框架
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614315
M. Živković, Dominik Auras, R. Mathar
{"title":"Reconfigurable framework for adaptive OFDM transmission","authors":"M. Živković, Dominik Auras, R. Mathar","doi":"10.1145/1614293.1614315","DOIUrl":"https://doi.org/10.1145/1614293.1614315","url":null,"abstract":"Optimal utilization of radio resources (bandwidth, transmit power) in multicarrier based systems becomes very challenging due to coexistence of various wireless standards within the same frequency band. Proposed demonstration, implemented in GNU Radio framework, enables capacity achieving OFDM-based data transmission between two network nodes with optimally configured transmission parameters for given system constraints. Furthermore, a highly reconfigurable framework allows for implementation and evaluation of various transmission strategies for different classes of given requirements and various sets of controllable parameters.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132592375","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 model for comparing rate adaptation algorithms 一个比较速率自适应算法的模型
Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization Pub Date : 2009-09-21 DOI: 10.1145/1614293.1614301
Candy Yiu, Suresh Singh
{"title":"A model for comparing rate adaptation algorithms","authors":"Candy Yiu, Suresh Singh","doi":"10.1145/1614293.1614301","DOIUrl":"https://doi.org/10.1145/1614293.1614301","url":null,"abstract":"Rate adaptation algorithms are critical to improving the throughput performance of WLANs. While previous studies have examined the performance of different algorithms in some detail using numerous measurements and simulations, there is a lack of a theory that would allow comparison across different channel conditions. This paper is a first step towards developing an abstract model that can allow us to (a) estimate or predict the performance of different algorithms and (b) allow us to make general statements about which algorithms would perform better, under what channel conditions. Our work is empirical in nature and uses three rate algorithms available in the Madwifi driver to examine the problem. We identify two key metrics, the speed of adaptation and the quality of adaptation, that taken together nicely encapsulate an algorithm's performance. We then show how these metrics predict the throughput behavior of the three rate algorithms considered with an accuracy of over 70%. Furthermore, we show that these metrics can be used to make very general statements comparing the behavior of any pair of algorithms over a wide range of channels.","PeriodicalId":239177,"journal":{"name":"Workshop on Wireless Network Testbeds, Experimental evaluation & CHaracterization","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123729520","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
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