{"title":"Gossip-based Computation of Average: a Closest Point Search Approach","authors":"F. Lu, L. Chia","doi":"10.1109/SENSORCOMM.2007.53","DOIUrl":"https://doi.org/10.1109/SENSORCOMM.2007.53","url":null,"abstract":"Due to simplicity and robustness, gossip based algorithms for data aggregation have recently received significant attention for applications in ad hoc and wireless sensor networks. Nodes in such networks operate under limited communication, computation, and energy resources. However, a common drawback of many gossip based protocols is the waste of energy in passing around redundant information multiple times. Thus gossip algorithms need to be re-designed in order to be applicable for energy constraint networks. In this paper, we study the averaging problem under the gossip constraint. In a network of n nodes, each node ui holds a value xi at the beginning and the objective is to compute the global average of these values in a distributed manner, while consuming least amount of energy. By formulating the problem as a closest point search in a n- dimensional cube, we demonstrate that the true average can be computed in the optimal O(log n) rounds without any probability involved. Moreover, the proposed algorithm is shown to outperform existing approaches for wireless sensor network in terms of the number of radio transmissions.","PeriodicalId":161788,"journal":{"name":"2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115800463","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}
{"title":"ANTARES: A System of Underwater Sensors Looking for Neutrinos","authors":"M. Ardid","doi":"10.1109/SENSORCOMM.2007.29","DOIUrl":"https://doi.org/10.1109/SENSORCOMM.2007.29","url":null,"abstract":"The detection of very high energy neutrinos requires very large detectors and a large overburden as a shield against the background of cosmic ray muons. ANTARES is at present the largest neutrino telescope currently under construction in the northern hemisphere. It is being built and installed at a depth of 2500 m in the Mediterranean Sea, near the Southern French coast, by a large European collaboration. A three-dimensional array of photomultipliers are used to detect the Cherenkov light emitted by neutrino- induced muons. The array, when completed, will consists of 12 lines each covering a vertical length of about 450 m and equipped with 75 photomultipliers arranged in triplets. The readout electronics is connected to an on-shore laboratory through a 42 km long electro-optical cable. The detector design, which constitutes a complex system of underwater sensors, together with preliminary technical results of the 5 lines already deployed and connected are presented.","PeriodicalId":161788,"journal":{"name":"2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130400893","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}
{"title":"A Kernel-Level Monitor over Multiprocessor Architectures for High-Performance Network Analysis with Commodity Hardware","authors":"A. Muñoz, A. Ferro, F. Liberal, J. López","doi":"10.1109/SENSORCOMM.2007.10","DOIUrl":"https://doi.org/10.1109/SENSORCOMM.2007.10","url":null,"abstract":"Traffic monitoring is an increasingly important discipline for nowadays networking, as Accounting, Security and also Quality of Service (QoS) lay on it. Besides, traffic bandwidth has increased exponentially in the last few years, and high-speed network monitoring is a challenging aim. Performance requirements are highly relevant for monitoring systems. A low-level study of the capturing stages on a traffic analysis system (TAS) has shown room for improvement. We provide an architecture able to cope with high-speed traffic monitoring using commodity hardware. Our design is also intended to exploit the parallelism available in up-to-date workstations. This paper presents a kernel-level monitoring system (ksensor) that, keeping the previous requirements, removes some issues from user-level processing, improving the overall performance.","PeriodicalId":161788,"journal":{"name":"2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129452930","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}
Yu Otake, Masumi Ichien, T. Takeuchi, Akihiro Gion, S. Mikami, H. Fujiwara, H. Kawaguchi, C. Ohta, M. Yoshimoto
{"title":"Cross-Layer Design for Low-Power Wireless Sensor Node Using Long-Wave Standard Time Code","authors":"Yu Otake, Masumi Ichien, T. Takeuchi, Akihiro Gion, S. Mikami, H. Fujiwara, H. Kawaguchi, C. Ohta, M. Yoshimoto","doi":"10.1109/SENSORCOMM.2007.40","DOIUrl":"https://doi.org/10.1109/SENSORCOMM.2007.40","url":null,"abstract":"We propose isochronous-MAC (I-MAC) using the long-wave standard time code, and introduce cross-layer design for a low-power wireless sensor node with I-MAC. I-MAC has a periodic wakeup time synchronized with the actual time, and thus requires a precise timer. However, a frequency of a crystal oscillator varies along with temperature, from node to node. We utilize a time correction algorithm to shorten the time difference among nodes. Thereby, the preamble length in I-MAC can be minimized, which saves a communication power. For further power reduction, a low-power crystal oscillator is also proposed, as a physical-layer design. We implemented I-MAC on an off-the-shelf sensor node to estimate the power saving, and verified that I-MAC reduces 81% of the total power, compared to low power listening.","PeriodicalId":161788,"journal":{"name":"2007 International Conference on Sensor Technologies and Applications (SENSORCOMM 2007)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130681443","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}