2012 National Conference on Communications (NCC)最新文献_第2页

A method of developing an agent based ubiquitous node monitoring protocol 一种基于agent的泛在节点监控协议的开发方法

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176800

Sarada Prasad Gochhayat, P. Venkataram

{"title":"A method of developing an agent based ubiquitous node monitoring protocol","authors":"Sarada Prasad Gochhayat, P. Venkataram","doi":"10.1109/NCC.2012.6176800","DOIUrl":"https://doi.org/10.1109/NCC.2012.6176800","url":null,"abstract":"A ubiquitous network plays a critical role to provide rendered services to ubiquitous application running nodes. To provide appropriate resources the nodes are needed to be monitored continuously. Monitoring a node in ubiquitous network is challenging because of dynamicity and heterogeneity of the ubiquitous network. The network monitor has to monitor resource parameters, like data rate, delay and throughput, as well as events such as node failure, network failure and fault in the system to curb the system failure. In this paper, we propose a method to develop a ubiquitous system monitoring protocol using agents. Earlier works on network monitoring using agents consider that the agents are designed for particular network. While in our work the heterogeneity property of the network has been considered. We have shown that the nodes' behaviour can be easily monitored by using agents (both static and mobile agent). The past behavior of the application and network, and past history of the Unode and the predecessor are taken into consideration to help SA to take appropriate decision during the time of emergency situation like unavailability of resources at the local administration, and to predict the migration of the Unode based on the previous node history. The results obtained in the simulation reflects the effectiveness of the technique.","PeriodicalId":178278,"journal":{"name":"2012 National Conference on Communications (NCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131386621","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

LDPC codes for the Slepian-Wolf coding LDPC编码为睡狼编码

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176801

J. B. Tamakuwala

引用次数: 0

A cooperative secondary user localization based primary user localization method for cognitive radio networks 一种基于认知无线网络主用户定位的协同辅助用户定位方法

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176751

P. Mankar, S. S. Pathak, R. V. Rajakumar

引用次数: 10

A normal factor graph approach for co-operative spectrum sensing in cognitive radio 认知无线电协同频谱感知的标准因子图方法

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176754

Debasish Bera, S. S. Pathak, I. Chakrabarti

{"title":"A normal factor graph approach for co-operative spectrum sensing in cognitive radio","authors":"Debasish Bera, S. S. Pathak, I. Chakrabarti","doi":"10.1109/NCC.2012.6176754","DOIUrl":"https://doi.org/10.1109/NCC.2012.6176754","url":null,"abstract":"In this paper, normal factor graph (NFG) based probabilistic inference approach for the cooperative spectrum sensing in cognitive radio (CR) is presented. Spectrum sensing problem is modeled as binary hypothesis testing problem. We have formulated the joint probability function with all latent and manifest variables which describe the system. Then decompose the joint distribution function into simpler conditional probability functions and represent them through normal factor graph. The exact marginalization is computed by passing the messages (probability values) among the nodes and edges using Sum-product-algorithm (SPA) / Belief-propagation (BP) algorithm. We compute messages for null and alternate hypothesis and apply Neyman-Pearson (NP) theorem based Likelihood ratio test (LRT) for optimal decision at fusion center. We consider non-central chi-square distribution for alternate hypothesis (H1). It is assumed that secondary users (SUs) are independently sensing the primary user (PU), therefore the graph has no cycle. It is employing energy detector based local sensing with hard decision. We consider non-ideal channel conditions for both PU-SU and SU-FC channels. Initially flat-fading, time-invariant channels with AWGN between PU-SUs and binary symmetric channels (BSC) and AWGN channels between SUs and fusion center (FC) are considered. Simulation results show that proposed methods improves the performance of the cooperative spectrum sensing.","PeriodicalId":178278,"journal":{"name":"2012 National Conference on Communications (NCC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117048511","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

Real-time stereo video decoding and rendering on multi-core architecture 基于多核架构的实时立体视频解码与渲染

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176907

C. Pujara, V. Veera, A. Kumar, N. Reddy, V. Tholath

{"title":"Real-time stereo video decoding and rendering on multi-core architecture","authors":"C. Pujara, V. Veera, A. Kumar, N. Reddy, V. Tholath","doi":"10.1109/NCC.2012.6176907","DOIUrl":"https://doi.org/10.1109/NCC.2012.6176907","url":null,"abstract":"With the production of 3D movies like `Avatar', demand for 3D content has seen enormous growth. With the development of advanced display and capturing technologies, 3D has become popular now a day. In this paper, techniques to implement stereo video (H.264/MVC coded) decoding and rendering on dual-core processors have been described. Depending on the type of display techniques used to display 3D video, different 3D formats are used to appropriately render it. E.g. Anaglyph for 2D screen, side by side, top bottom, checker board (DLP), frame sequential for 3D TVs. Format conversion is implemented as a post processing module and final 3D format data is fed to the device. Format conversion and rendering is also a cycle consuming task which is independent of video decoding. We here propose to decode the stereo video on one core and rendering and format conversion on the other core of a dual-core processor. Proposed idea has been implemented on Intel dual core architecture and on OMAP4 platform having ARM Cortex-A9 dual core processor. Results show that total decoding and rendering time can be brought closer to decoding time using dual core architecture under assumption that decoding time is greater than the rendering time which is the case generally.","PeriodicalId":178278,"journal":{"name":"2012 National Conference on Communications (NCC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124051979","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

Detection and selective destruction of bacteria colony at THz frequencies 太赫兹频率下细菌菌落的检测与选择性破坏

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176808

M. Faruk Ali, S. Ray

引用次数: 2

Cooperative spectrum sensing with censoring of cognitive radios in Rayleigh fading channel 瑞利衰落信道中认知无线电的协同频谱感知与滤波

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176780

S. Nallagonda, S. D. Roy, S. Kundu

引用次数: 18

Reliable data transmission in sensor networks using compressive sensing and real expander codes 传感器网络中使用压缩感知和实扩展码的可靠数据传输

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176847

S. Kadhe, Sandhyasree Thaskani, M. Chandra, B. S. Adiga

{"title":"Reliable data transmission in sensor networks using compressive sensing and real expander codes","authors":"S. Kadhe, Sandhyasree Thaskani, M. Chandra, B. S. Adiga","doi":"10.1109/NCC.2012.6176847","DOIUrl":"https://doi.org/10.1109/NCC.2012.6176847","url":null,"abstract":"The resource-constraints in the sensor networks make reliable data communication a challenging task. Particularly, the limited availability of battery and computing power necessitates designing computationally efficient means for providing data compression and protection against data loss. In this paper, we propose to integrate the emerging framework of compressive sensing (CS) with real expander codes (RECs), coined as CS-REC, for robust data transmission. CS works as a computationally inexpensive data compression scheme, while RECs act as an elegant application layer erasure coding scheme. The benefits provided by RECs are twofold: one, RECs require only few addition-subtraction operations over real numbers for encoding and decoding; two, they provide graceful degradation in recovery performance with increase in the number of erasures. Through elaborate simulations, we show that CS-REC can achieve the recovery performance close to the case where there is no data loss. Further, again via simulations, we demonstrate the usefulness of CS-REC for reliably transmitting image data in multimedia sensor networks.","PeriodicalId":178278,"journal":{"name":"2012 National Conference on Communications (NCC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128606448","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: 6

Closed form BER expressions for BPSK OFDM systems with fractional timing offset and carrier frequency offset 具有分数阶时间偏移和载波频率偏移的BPSK OFDM系统的封闭BER表达式

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176812

R. U. Mahesh, A. Chaturvedi

引用次数: 6

Segmentation of camera-trap tiger images based on texture and color features 基于纹理和颜色特征的相机陷阱老虎图像分割

2012 National Conference on Communications (NCC) Pub Date : 2012-04-03 DOI: 10.1109/NCC.2012.6176908

K. P. Reddy, R. Aravind

引用次数: 3