{"title":"Energy efficient spatial distribution of nodes in a sensor network","authors":"P. S. Prasad, Prathima Agrawal","doi":"10.1109/SARNOF.2007.4567360","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567360","url":null,"abstract":"A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes to a sink. This scheme makes use of link usage probabilities to route data packets to immediate neighbors. It also incorporates angular routing which forwards packets only to neighboring sensor nodes present in assigned conical regions to prevent unnecessarily lengthy routes.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130191005","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 link layer adaptive pacing scheme for improving performance of Wireless Mesh Networks","authors":"A. Franklin, B. Ramana, C. S. Ram Murthy","doi":"10.1109/SARNOF.2007.4567329","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567329","url":null,"abstract":"In this paper, we propose an adaptive pacing scheme at the link layer for IEEE 802.11 based multihop wireless networks. Our objective is to improve the performance of higher layer protocols without any modifications to them. Our adaptive pacing scheme estimates the four-hop transmission delay in the network path without incurring any additional overheads, and accordingly paces the packets to reduce the contention in the network. We implemented the Link layer adaptive pacing scheme in ns-2.29 network simulator and extensively studied its performance for both user datagram protocol (UDP) and transmission control protocol (TCP) traffic in different network scenarios. In all the cases our scheme shows a significant improvement in the performance of both UDP and TCP.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114931455","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":"Delay Tolerant Networking for free-space optical communication systems","authors":"R. Nichols, A. R. Hammons, D. Tebben, A. Dwivedi","doi":"10.1109/SARNOF.2007.4567371","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567371","url":null,"abstract":"Free-space optical communication (FSOC) systems will be an important part of future networking infrastructures. With the growth in demand from users - both commercial and military - and the scarcity of available RF spectrum, FSOC has the potential to offer a solution. FSOC capacity can easily reach 10psilas Gbps or more over useful ranges. However, the ability to construct an FSOC network has many challenges such as pointing, acquisition and tracking; propagation impairments like weather; eye safety and others. In many of these cases, this will result in an intermittently-connected network, though of tremendous capacity on a per-link basis. This paper examines the applicability of delay tolerant networking (DTN) approaches to such networks and proposes a new routing algorithm that is tailored for the FSOC network characteristics.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133686942","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":"Mode-coupled stubs-tuned planar resonator based spectral pure signal source for wireless communication systems","authors":"U. Rohde, A. Poddar","doi":"10.1109/SARNOF.2007.4567305","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567305","url":null,"abstract":"A novel compact coupled planar resonator (CCPR) based VCO (voltage controlled oscillator) using mode-coupling technique was developed in response to expensive high Ceramic and SAW resonators based signal source for wireless communications. One of the problems related to the conventional Ceramic/SAW based resonators (with high Q and low phase noise) is the challenge for integration in IC form. Instead of employing the distributed planar uncoupled transmission line resonator for integration that exhibits low Q and high phase noise, this work describes a CCPR based VCO that supports user-definable frequency band in compact size and amenable for integration in the IC form. The measured phase noise for a carrier frequency 622 MHz is better than -135 dBc/Hz at 10 kHz offset, and to our knowledge, this is the best phase noise performance for this class of VCOs using printed resonator in 0.5'times0.5' circuit board size so far reported. The reported topology is not limited to this frequency, can be extended for other higher frequency by incorporating mode-injection stubs across the CCPR for desired operating frequency.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133122299","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":"Mediated overlay services (MOSES): Network security as a composable service","authors":"S. Sidiroglou, A. Stavrou, A. Keromytis","doi":"10.1109/SARNOF.2007.4567338","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567338","url":null,"abstract":"In recent years, organizations have been shifting focus to their core business competencies, and reducing total cost of ownership (TCO) associated with training and management of their IT infrastructure. In the same motif, organizations are establishing security and survivability frameworks as an integral part of their business strategy so as to provide an acceptable quality-of-service for their clients and employees. However, the current paradigm of outsourced managed security service providers (MSSPs) is often difficult to transition to, offers little control to the organization, does not allow ldquobest of breedrdquo composition, and risks vendor lock-in due to the complexity of migrating to a different MSSP. We present MOSES (Mediated Overlay Services), an architecture for composing network security services such as anti-spam, antivirus, automated vulnerability detection and mitigation, and filtering. MOSES is roughly modeled on the web services framework. In addition to ease-of-deployment, MOSES allows for economies of scale and a reduction to the total cost of ownership. In this paper, we discuss our motivation and high-level view of such an architecture. We highlight the advantages, illuminate potential drawbacks, and discuss a broad research agenda toward realizing this vision.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125696548","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}
O. Issa, Jean-Charles Grégoire, Y. Belala, J. Wong
{"title":"Performance analysis of medical video monitoring and surveillance applications for 3G mobile terminals","authors":"O. Issa, Jean-Charles Grégoire, Y. Belala, J. Wong","doi":"10.1109/SARNOF.2007.4567350","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567350","url":null,"abstract":"Video-streaming can now be offered on third-generation (3G) mobile networks. Most research efforts have focused on video download. This paper presents a detailed study of challenges faced for successfully deploying applications requiring life video upload. Both subjective and objective qualities as well as the effects of mobility are analyzed on real 3G networks. Consequently, video profiles are identified for delivering adequate perceptual quality to remote users and guaranteeing uninterrupted video-streaming in presence of variable radio resources.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122314240","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 fast forward medium access control protocol for IEEE 802.11s mesh networks with multiple channels","authors":"Guomei Zhu, G. Kuo","doi":"10.1109/SARNOF.2007.4567399","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567399","url":null,"abstract":"This paper proposes a fast forward medium access control protocol (FFMAC) for quality-of-service (QoS) guarantee in multihop IEEE 802.11s wireless mesh networks with multiple channels. To the best of our knowledge, the proposed protocol is the first one which considers the multihop and multichannel issues simultaneously. It provides higher priority for real-time applications, while remaining the distributed coordination function (DCF) for best-effort ones. The mathematical analyses and simulation results show that FFMAC can reduce the end-to-end delay and increase throughput significantly.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126165150","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":"Unequal error protection with eigen beamforming for partial channel information MIMO-OFDM","authors":"K. Hassan, W. Henkel","doi":"10.1109/SARNOF.2007.4567315","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567315","url":null,"abstract":"Some communication applications, like multimedia, deliver data of different importance classes allowing unequal error protection (UEP) levels. In this paper, a multiple-input multiple-output (MIMO) system using orthogonal frequency division multiplexing (OFDM) is considered with a new UEP bit-loading algorithm based on the non-UEP algorithm by Chow, Cioffi, and Bingham. In the proposed bit-loading algorithm, bits are distributed across the unitarily transformed eigenbeams in case of partial channel information (CSI) knowledge. However, ideal performance can not withstand the rapid wireless channel variation unless a restricted beamforming is used. For the case of partial CSI, we proposed a switched beamforming technique that can maintain the required performance protection levels.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127186848","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":"Stochastic optimization methods for angle of arrival estimation","authors":"H. Hoang, T. Koklu, B. W. Kwan, Ming Yu","doi":"10.1109/SARNOF.2007.4567312","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567312","url":null,"abstract":"The difficulty for accurate determination of the angles of arrival (AOA) of signals arises from the optimization of likelihood functions of high dimension. Usually, a gradient-based technique is employed to find the optimum of the function. However, this method requires heavy computational work and the differentiability of the likelihood function. This paper presents two gradient-free methods: One is based on the Markov Chain Monte Carlo (MCMC) method and the other applies particle swarm optimization (PSO) to estimate the AOA. The main difference between the two methods is that the PSO-based method exploits multiple random search paths, while the MCMC-based method only employs undirected random search along a single path. A practical search space is also proposed for the case of symmetric objective functions to reduce the computational work in a manner that the traditional PSO stopping criteria is still applicable. To illustrate these techniques, a uniform linear antenna array is considered under the influence of additive complex Gaussian noise.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127864305","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}
Youngjoo Han, Hyewon Song, Chan-Hyun Youn, Eunbo Shim, Bong-Hwan Lee
{"title":"Policy-based resource management mechanism for dynamic Grid environments","authors":"Youngjoo Han, Hyewon Song, Chan-Hyun Youn, Eunbo Shim, Bong-Hwan Lee","doi":"10.1109/SARNOF.2007.4567396","DOIUrl":"https://doi.org/10.1109/SARNOF.2007.4567396","url":null,"abstract":"As Grid networks grows, the complexity of resource management in Grid networks dramatically increases. To manage the Grid resources efficiently, policy based resource management system is suitable. However, the policy which made at a moment could not be appropriate to other time because the condition of the grid resources with time space changes. Thus, in this paper, we propose asynchronous policy-based Grid resource management mechanism for maintaining consistency between policies of Grid plane and network plane. Policy decision scheme for management cost and QoS guarantee make available resource quorum with Service Level Agreements (SLA), grid resource and network resource information in advance. If the available resource could not guarantee the userpsilas SLA in terms of completion time, service management suite divide the job into some sub-jobs to provide QoS service, and then process each sub-job. Through the adjustment scheme for maintaining consistency of policy, we can guarantee QoS service and stable service.","PeriodicalId":293243,"journal":{"name":"2007 IEEE Sarnoff Symposium","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121045478","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}