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HANS: Harvesting aware networking service for energy management in wireless sensor networks 无线传感器网络中能量管理的感知网络服务
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898914
Philipp M. Glatz, L. Hörmann, C. Steger, R. Weiss
{"title":"HANS: Harvesting aware networking service for energy management in wireless sensor networks","authors":"Philipp M. Glatz, L. Hörmann, C. Steger, R. Weiss","doi":"10.1109/CTS.2011.5898914","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898914","url":null,"abstract":"Large scale deployments of small, wireless, networked, embedded systems demand for cost reduction in development and maintenance. Most often, this translates into the need for reliable methods for energy conservation as it is the case for wireless sensor networks (WSNs). Our work considers energy harvesting system (EHS)-enhanced WSN technology which is the state-of-the-art technology for perpetual systems supplied from ambient environmental energy. Therefore several aspects have been considered in literature so far: EHS design, energy prediction modeling, harvesting aware media access control (MAC) and routing and finally power management. This paper postulates that identifying and optimizing these aspects on their own does not necessarily lead to feasible solutions. We take a cross-layer perspective and provide a networking protocol for implicit or explicit EHS policy negotiation under the constraint of two prototypical communication patterns. The methods presented show how to combine energy aware routing or conservation from network coding with EHS power management policies under the constraint of state-of-the-art MAC. Evaluation of different end-user communication patterns lets the reader interpret the results for an application at hand.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130851167","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
Code cross-correlation effects on the performance of optical cdma systems in the presence of receiver noises 存在接收机噪声时码互关对光cdma系统性能的影响
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.6024144
S. M. Zabihi-Maddah, M. M. Kakhki
{"title":"Code cross-correlation effects on the performance of optical cdma systems in the presence of receiver noises","authors":"S. M. Zabihi-Maddah, M. M. Kakhki","doi":"10.1109/CTS.2011.6024144","DOIUrl":"https://doi.org/10.1109/CTS.2011.6024144","url":null,"abstract":"Increasing the number of simultaneous users is one of the challenging issues in incoherent and asynchronous optical CDMA systems. One solution is to increase the value of cross- correlation, λ<sub>c</sub>. In neglecting the effect of noise, optimum value of λ<sub>c</sub>was obtained. In this work, with considering noise, the simultaneous effect of λ<sub>c</sub> and transmitted power on the probability of bit error (pbe) is investigated. Our investigation is performed by employing OOC (λ<sub>c</sub> =1) and prime code (λ<sub>c</sub> =2) and active correlator is chosen for its robustness against the noise. The performance is analyzed for three common receiver structures, namely soft receiver (without optical hard limiter), single optical hard limiter (SHL) and double optical hard limiters (DHL). Our results show that under the same bandwidth efficiency, increasing λ<sub>c</sub> in high power regimes decreases the pbe but increasing λ<sub>c</sub> in low power regimes will increase pbe.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115306373","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
A novel detection strategy based on ant colony optimization for MIMO systems 一种新的基于蚁群优化的MIMO系统检测策略
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898987
Ruohan Cao, Tiejun Lv, Hui Gao, Pengfei Chang
{"title":"A novel detection strategy based on ant colony optimization for MIMO systems","authors":"Ruohan Cao, Tiejun Lv, Hui Gao, Pengfei Chang","doi":"10.1109/CTS.2011.5898987","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898987","url":null,"abstract":"This paper proposes two detection schemes based on a novel strategy associated with ant colony optimization (ACO) for multiple-input multiple-output (MIMO) systems. By employing heuristic values and pheromone levels, we jointly exploit local and global information about solution space to constitute transition probability. The proposed constitution rule evaluates the reliability of possible solution more efficiently than previous research. Besides, the unreliable solutions in terms of pheromone levels are deleted before each iteration for reducing the scale of solution space. Both simulations and analysis confirm that the proposed schemes provide improved tradeoff between complexity and performance over traditional detectors.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121634998","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: 0
Custom tailored location based services: An IMS implementation 定制的基于位置的服务:IMS实现
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898902
Alton MacDonald, R. Cartas, J. Incera
{"title":"Custom tailored location based services: An IMS implementation","authors":"Alton MacDonald, R. Cartas, J. Incera","doi":"10.1109/CTS.2011.5898902","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898902","url":null,"abstract":"Digital convergence is becoming increasingly imortant to both network operators and end users. Network operators look to Next Generation Network (NGN) solutions to meet the ever growing user demand and to the IP Multimedia Subsystem (IMS) as a catalyzer for attractive and innovative services which aim at improving user Quality of Experience (QoE). IMS, presented as the first working implementation of a Service Delivery Platform (SDP), takes great strides to ease migration to NGN as well as help the network become transparent to the end user. Location Based Services (LBS) also play an important role in QoE by supplying relevant information on the user's whereabouts directly enhancing their day-to-day activities. The combination of LBS within IMS holds great promise for future services where service delivery mimics a network responding directly to user activities. This helps dissolve the difference between the network and the User Equipment (UE), thus increasing user adoption through a transparent network and service delivery. This paper presents two personalized LBS implemented within an IMS test bed acting as a proof of concept for providing improved QoE on an IMS infrastructure as well as demonstrating that service creation is relatively easy to achieve in IMS.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127516484","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: 0
Real-time web crawler detection 实时网络爬虫检测
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898963
Andoena Balla, A. Stassopoulou, M. Dikaiakos
{"title":"Real-time web crawler detection","authors":"Andoena Balla, A. Stassopoulou, M. Dikaiakos","doi":"10.1109/CTS.2011.5898963","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898963","url":null,"abstract":"In this paper we present a methodology for detecting web crawlers in real time. We use decision trees to classify requests in real time, as originating from a crawler or human, while their session is ongoing. For this purpose we used machine learning techniques to identify the most important features that differentiate humans from crawlers. The method was tested in real time with the help of an emulator, using only a small number of requests. Our results demonstrate the effectiveness and applicability of our approach.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"144 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129512951","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: 25
An LDPC-based improved decoding scheme for distributed video codec 一种基于ldpc的分布式视频编解码器改进译码方案
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898939
Bin Li, Yumei Wang, Qing Huang, Yu Liu
{"title":"An LDPC-based improved decoding scheme for distributed video codec","authors":"Bin Li, Yumei Wang, Qing Huang, Yu Liu","doi":"10.1109/CTS.2011.5898939","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898939","url":null,"abstract":"Low-density Parity-Check (LDPC) code is widely used in distributed video coding (DVC) to realizing Wyner-Ziv (WZ) coding for its better performance than other channel codes. However, during the LDPC decoding process, most of DVC solutions do not make use of the video character to help decoding. In this paper, we propose an improved LDPC decoding scheme for DVC by utilizing the movement of the objects in the video sequence to partition different confidence areas for the side information (SI). The pixels in the SI correspond to different confidence areas, and the corresponding binary representations of the pixels will have different likelihood-ratio (LLR) initialization methods which are used to generate the LLR values for LDPC iterative decoding. The experimental results show that with the proposed decoding scheme the PSNR gain can reach up to 0.8 db without increasing the decoding complexity.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128599623","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: 4
Flexible hardware architecture of SEFDM transmitters with real-time non-orthogonal adjustment 实时非正交调整SEFDM发射机的柔性硬件结构
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898952
M. Perrett, I. Darwazeh
{"title":"Flexible hardware architecture of SEFDM transmitters with real-time non-orthogonal adjustment","authors":"M. Perrett, I. Darwazeh","doi":"10.1109/CTS.2011.5898952","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898952","url":null,"abstract":"Field Programmable Gate Arrays (FPGA) offer a unique combination of software abstraction and hardware performance, enabled by programming languages such as VHDL or Verilog. Inherent from this capability is a multitude of different design possibilities for a single implementation problem. A system can be designed which allows for real world evaluation at real time speeds of algorithms ordinarily restricted to simulation environments. Presented here is an FPGA implementation of a method of generating non-orthogonal Frequency Division Multiplexed signals, where the spacing between sub-carriers can be controlled externally without the need for re-synthesis. The internal data-paths and associated algorithms are constructed so as to react to changes which dictate the aforementioned spacing, and as such represents a dynamic transmission platform for research purposes.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"12 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130483927","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: 31
Improving the performance of delay based protocol in delivering real time media via early retransmission 通过早期重传提高基于延迟协议的实时媒体传输性能
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898979
Zhiyuan Yin, H. Alnuweiri, A. L. Narasimha Reddy, H. Çelebi, K. Qaraqe
{"title":"Improving the performance of delay based protocol in delivering real time media via early retransmission","authors":"Zhiyuan Yin, H. Alnuweiri, A. L. Narasimha Reddy, H. Çelebi, K. Qaraqe","doi":"10.1109/CTS.2011.5898979","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898979","url":null,"abstract":"Early Retransmission (ER) has already been shown to improve TCP-SACK's performance in delivering time sensitive media. In this paper, we integrate the ER scheme into a delay-based TCP variant, namely TCP-PERT, and performs extensive ns2 simulation. Our results show that ER can also improve PERT's performance in delivering real time media by reducing the latency caused by retransmission timeouts. Furthermore, we also explored the improvement brought by employing a finegrained retransmission timer, and compared it with ER. We find out a) ER outperforms fine grained timer in a variety of conditions and b) the combination of the two can further improve performance.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120956973","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
Multiple event detection in wireless sensor networks using compressed sensing 基于压缩感知的无线传感器网络多事件检测
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898935
Yu Liu, Xuqi Zhu, Cong Ma, Lin Zhang
{"title":"Multiple event detection in wireless sensor networks using compressed sensing","authors":"Yu Liu, Xuqi Zhu, Cong Ma, Lin Zhang","doi":"10.1109/CTS.2011.5898935","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898935","url":null,"abstract":"Event Detection is one of the main applications of wireless sensor networks (WSN). However, due to the noisy sensed data of sensors and the wireless channel noise, it's difficult to guarantee the accuracy of detection, especially in multiple event detection. In this paper, we proposed a multiple event detection scheme using compressed sensing (CS). By analogy with CS problem, the efficient recovery algorithms of CS can be used to reconstruct the source signal that contains multiple simultaneous events. Moreover, the events may not change much, so the source signals at two adjacent time instants have high redundancy. This temporal correlation is also utilized in our scheme to improve the detection accuracy. In the proposed scheme, not only the position but also the value of an event can be achieved. Three algorithms of CS are used in our scheme to show the advantages on detection probability over the traditional decentralized detection methods using Bayesian.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121040766","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
Mobility solutions for wireless sensor and actuator networks with performance guarantees 移动解决方案，无线传感器和执行器网络的性能保证
2011 18th International Conference on Telecommunications Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898959
Z. Zinonos, Ricardo M. Silva, V. Vassiliou, J. Silva
{"title":"Mobility solutions for wireless sensor and actuator networks with performance guarantees","authors":"Z. Zinonos, Ricardo M. Silva, V. Vassiliou, J. Silva","doi":"10.1109/CTS.2011.5898959","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898959","url":null,"abstract":"Wireless sensor and actuator networks (WSANs) have been studied for about ten years now. However, a gap between research and real applications and implementations remains. The lack of an integrated solution, capable of providing the reliability levels of monitoring and actuation required by critical applications, have postponed the replacement and extension of the existing inflexible and expensive wired solutions with the low-cost, easy-to-deploy, and portable wireless options. In order to assist this transition this paper presents a new method for supporting mobility in WSANs specifically designed for time-critical scenarios. The method is being targeted for a critical application located in a real oil refinery, in which a WSAN has been implemented in the scope of a European research project.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121105230","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: 29
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