International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks最新文献_第7页

Optimizing network lifetime for distributed tracking with wireless sensor networks 无线传感器网络分布式跟踪的网络寿命优化

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069094

N. Roseveare, B. Natarajan

{"title":"Optimizing network lifetime for distributed tracking with wireless sensor networks","authors":"N. Roseveare, B. Natarajan","doi":"10.1145/2069087.2069094","DOIUrl":"https://doi.org/10.1145/2069087.2069094","url":null,"abstract":"We consider the challenging problem of distributed tracking using wireless sensor networks (WSN). In our scenario, multiple spatially distributed sensor nodes estimate a physical process (viz. a moving object) and transmit quantized state estimates to a central fusion node for processing. The fusion node utilizes a BLUE (Best Linear Unbiased Estimation) approach to combine the individual sensor estimates. In this paradigm the uncertainty of the final estimate is dependent on the quantization and transmit energy levels. This makes the problem particularly challenging since power and bandwidth are critically constrained resources in WSNs. Thus, the trade-off between estimation quality and network lifetime is inherent. This work optimizes resource utilization while constraining estimation performance. Two convex formulations of the resulting Mixed-Integer Non-Linear program (MINLP) are given. Unlike most previous work, this effort heuristically incorporates the operating states of the nodes into the optimal decisions. The heuristic accomplishes a redistribution of effort, tasking healthier nodes to contribute more resources to the estimation process. Simulation results are presented for the given formulations which demonstrate the effectiveness of the heuristic for extending network lifetime.","PeriodicalId":311005,"journal":{"name":"International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132785533","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

Energy saving and capacity gain of micro sites in regular LTE networks: downlink traffic layer analysis 常规LTE网络中微站点的节能与容量增益:下行流量层分析

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069099

T. Tesfay, R. Khalili, J. Boudec, F. Richter, A. Fehske

{"title":"Energy saving and capacity gain of micro sites in regular LTE networks: downlink traffic layer analysis","authors":"T. Tesfay, R. Khalili, J. Boudec, F. Richter, A. Fehske","doi":"10.1145/2069087.2069099","DOIUrl":"https://doi.org/10.1145/2069087.2069099","url":null,"abstract":"We study the effect of deployment of low cost, low power micro base stations along with macro base stations on energy consumption and capacity of downlink LTE. [1] studied this problem, using spectral area efficiency as the performance metric. We show that the analysis proposed in [1] is inaccurate as the traffic layer specifications of LTE networks is not included in the analysis. We also investigate the effect of user association and frequency band allocation schemes on energy consumption and capacity of LTE networks. Specifically, we add the following three important elements to the analysis proposed in [1]: a traffic layer analysis that take both the physical and traffic layer specifications of LTE downlink into account; a threshold-based policy to optimally associate users to base stations; and an allocation scheme to better allocate the frequency band to macro and micro base stations. We investigate all combinations of these elements through numerical evaluation and observe that 1. there are important differences between traffic layer and physical layer analysis, 2. threshold-based user association policy improve the traffic capacity of the network by up to 33% without affecting the energy profile of the network, and 3. considerable energy saving and capacity gain can be achieved thought a careful allocation of the frequency band to macro and micro base stations.\u0000 Finally, we determine the optimal network configuration and show that up to 46% saving in energy can be achieved compared to the case that no micro base stations are deployed in the network.","PeriodicalId":311005,"journal":{"name":"International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116823250","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: 23

Space-division repetition-based broadcasting protocol for reliable beaconing in VANETs 用于vanet中可靠信标的基于空间分割重复的广播协议

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069089

Hongseok Yoo, Dongkyun Kim

{"title":"Space-division repetition-based broadcasting protocol for reliable beaconing in VANETs","authors":"Hongseok Yoo, Dongkyun Kim","doi":"10.1145/2069087.2069089","DOIUrl":"https://doi.org/10.1145/2069087.2069089","url":null,"abstract":"In vehicular ad hoc networks (VANETs), beaconing (i.e. periodic transmissions of beacons) is one of the most challenging issues, which is mainly used to advertise the presence of a car to its neighbor cars. Based on the proximity awareness achieved through the beaconing, safety applications can quickly detect dangerous road situations and help drivers avoid them. Recently, repetition-based protocols have been proposed to meet the requirements of timeliness and reliability for the beaconing. However, since most of existing protocols employ CSMA as their underlying medium access control strategy, they are vulnerable to interference from hidden nodes. In this paper, we propose a new broadcasting protocol called Space-Division Repetition-based Broadcasting protocol (SDRB) in order to reduce interference caused by hidden nodes. In SDRB, the geographical area where vehicles are located is divided into smaller space divisions. Vehicles within difference space divisions are allowed to transmit their beacons at different points of time in order to cope with interference from hidden nodes. From the ns-2 simulation results, we verified that SDRB provides more reliable broadcasting service due to its capability of removing such interference as compared to CSMA.","PeriodicalId":311005,"journal":{"name":"International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks","volume":"56 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114048359","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 comparative analysis of the user behavior in academic WiFi networks 学术WiFi网络用户行为对比分析

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069096

E. Zola, F. Barceló

{"title":"A comparative analysis of the user behavior in academic WiFi networks","authors":"E. Zola, F. Barceló","doi":"10.1145/2069087.2069096","DOIUrl":"https://doi.org/10.1145/2069087.2069096","url":null,"abstract":"Wireless local area networks (WLAN) are common in universities and their popularity grows every day. Understanding the trends in the use of these networks (i.e. how much, when and where traffic is present) is becoming more relevant. Interesting results can be extracted by analyzing WLAN traces from real scenarios. In this work, three buildings are studied on two campuses in Barcelona (Spain) and its surroundings. This is the first study providing the user behavior in a European campus. Similar trends are observed in the three buildings, despite the different amount of users, purpose of the building and size of the campus. Daily and weekly patterns are shown. The population accessing the networks is mostly composed of infrequent users: less than half of the devices access the WLAN more than four days during the three months studied. Many users visiting one building associate with only one access point: despite the widespread use of lightweight devices many users are static. The main difference among different buildings is the fidelity of users: users on a small campus are more likely to reappear on different days than on a large campus, where the population is more heterogeneous. The results of this analysis provide general tools for characterizing campus-wide WLAN and a better understanding of usage and performance issues in a mature wireless network in Europe.","PeriodicalId":311005,"journal":{"name":"International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129477818","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: 13

WSN with energy-harvesting: modeling and simulation based on a practical architecture using real radiation levels 具有能量收集的WSN:基于使用真实辐射水平的实用架构的建模和仿真

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069091

Antonio Sánchez, S. Climent, S. Blanc, J. V. Capella, Ignacio Piqueras-Salazar

{"title":"WSN with energy-harvesting: modeling and simulation based on a practical architecture using real radiation levels","authors":"Antonio Sánchez, S. Climent, S. Blanc, J. V. Capella, Ignacio Piqueras-Salazar","doi":"10.1145/2069087.2069091","DOIUrl":"https://doi.org/10.1145/2069087.2069091","url":null,"abstract":"This paper presents a new energy-harvesting provider for ns-3 simulation tool. The provider model assumes solar energy harvesting and super-capacitor storage to supply power to a Wireless Sensor Node. Super-capacitors charge and discharge is dynamically estimated based on both power consumption in the node and solar radiation levels. On one hand, super-capacitors voltage level is refreshed within each radio mode change. However, because a radio mode can be longer than few milliseconds, refreshments are also time schedule. On the other hand, solar radiation data in CSV format (comma-separated values) can be downloaded from public meteorological data bases. The model incorporates these input data being possible to simulate from one minute to weeks or months using real radiation curves observed in a specific world location at a year period. The research presented in this paper will be very useful for the study and development of energy-efficient algorithms with energy-neutral operation to build everlasting Wireless Sensor Networks.","PeriodicalId":311005,"journal":{"name":"International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133722274","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: 20

Impact of VoIP codecs on the energy consumption of portable devices VoIP编解码器对便携式设备能耗的影响

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069104

A. Estepa, J. Vozmediano, Jorge López, R. Estepa

引用次数: 11

Optimal transmission modes by simulated annealing 模拟退火法优化传输模式

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069101

Jarno Nousiainen, J. Virtamo, P. Lassila

引用次数: 1

Graph approximations of spatial wireless network models 空间无线网络模型的图逼近

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069100

Janne Riihijärvi, E. Meshkova, P. Mähönen

{"title":"Graph approximations of spatial wireless network models","authors":"Janne Riihijärvi, E. Meshkova, P. Mähönen","doi":"10.1145/2069087.2069100","DOIUrl":"https://doi.org/10.1145/2069087.2069100","url":null,"abstract":"Wireless networks are usually modeled as spatial objects, and more specifically with random processes generating the locations of individual nodes. This is in stark contrast to the fixed networks case, in which graph models are typically used. While expressive, spatial models are usually more difficult to analyze than graph based ones, which has resulted in adoption of oversimplified models in wireless networks research. In this paper we show how wireless networks can be modeled as graphs without losing the accuracy of spatial models. We argue based on measurements of wireless network performance that in a number of cases distance-dependent interactions between wireless nodes can be discretized with only small approximation error. This discretization immediately yields an approximation of a spatial wireless network model as a graph with multiple edge types. We study the structure of the arising graph models, and show that the choice of accurate underlying spatial model remains important. For accurate spatial models, the corresponding graph approximations have a relatively simple neighborhood structure, indicating that they can be used very effectively in performance evaluation and optimization applications.","PeriodicalId":311005,"journal":{"name":"International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114390788","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

Using geolocation information for dynamic spectrum access in cellular networks 利用地理位置信息实现蜂窝网络中的动态频谱接入

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2011-10-31 DOI: 10.1145/2069087.2069098

J. Nasreddine, Natalia Miliou, Janne Riihijärvi, A. Polydoros, P. Mähönen

引用次数: 5

A novel approach to power allocation in wireless ad hoc networks 无线自组织网络中一种新的功率分配方法

International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks Pub Date : 2010-10-20 DOI: 10.1145/1868612.1868626

S. P. Shariatpanahi, B. Khalaj

引用次数: 1