E. Kartsakli, A. Lalos, A. Antonopoulos, S. Tennina, M. Renzo, L. Alonso
{"title":"End-to-end communication challenges in M2M systems for mHealth applications","authors":"E. Kartsakli, A. Lalos, A. Antonopoulos, S. Tennina, M. Renzo, L. Alonso","doi":"10.1109/CAMAD.2014.7033265","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033265","url":null,"abstract":"In the new era of connectivity, marked by the explosive number of wireless electronic devices and the need for smart and pervasive applications, Machine-to-Machine (M2M) communications are an emerging technology that enables the seamless device interconnection without the need of human interaction. The use of M2M technology can bring to life a wide range of mHealth applications, with considerable benefits for both patients and healthcare providers. Many technological challenges have to be met, however, to ensure the widespread adoption of mHealth solutions in the future. In this paper, after describing the key elements of the M2M architecture, we discuss the main design challenges from a communication perspective and we present some relevant ongoing projects for mHealth applications.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128697574","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}
Alexandros G. Fragkiadakis, Pavlos Charalampidis, Stefanos Papadakis, E. Tragos
{"title":"Experiences with deploying Compressive Sensing and Matrix Completion techniques in IoT devices","authors":"Alexandros G. Fragkiadakis, Pavlos Charalampidis, Stefanos Papadakis, E. Tragos","doi":"10.1109/CAMAD.2014.7033237","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033237","url":null,"abstract":"The Internet of Things (IoT) presents itself as a promising set of technologies for providing innovative smart applications in a number of domains, spreading from agriculture to buildings and industrial control. For providing smart applications in the various domains, large numbers of devices must be deployed within large areas, communicating wirelessly with each other. These IoT devices are mainly resource constrained, with limited computing capabilities and battery life. Furthermore, it is well-known that the most energy consuming operations in wireless devices is the wireless transmission. Thus, there is a strict requirement that to prolong the lifetime of these devices, the transmissions must be controlled. Additionally, communication security is a key issue in many smart applications, because, according to recent studies, there is a lack of secure communication protocols in most existing IoT devices. This paper aims to address these two main issues in the IoT world, providing a framework for lightweight encryption and compression of data using the Compressive Sensing theory, and discusses the experiences of the implementation of the framework on real world devices. Moreover, it is also well-known that the transmissions of wireless sensors are very sensitive to packet loss due to concurrent transmissions of other wireless protocols (i.e. WiFi). This paper also presents the implementation of a framework for applying Matrix Completion techniques in real world IoT devices.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126051725","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}
V. Vassilakis, I. Moscholios, J. Vardakas, M. Logothetis
{"title":"Handoff modeling in cellular CDMA with finite sources and state-dependent bandwidth requirements","authors":"V. Vassilakis, I. Moscholios, J. Vardakas, M. Logothetis","doi":"10.1109/CAMAD.2014.7033199","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033199","url":null,"abstract":"It is envisioned that small cells are going to play an important role in future cellular networks. Due to limited coverage areas of small cells and increased user mobility, a proper analysis and evaluation of handoff traffic is of major importance. In this paper, we propose a novel teletraffic model for the analysis of handoff traffic in cellular CDMA networks. When the cell load is above a predefined threshold, we allow the handoff calls to reduce their bandwidth requirements in order to avoid blocking. Our model also realistically assumes a finite number of traffic sources in the cell and enables analytical determination of uplink blocking probabilities for new and handoff calls. To this end, the CDMA system has been described as a continuous-time Markov chain in order to derive an efficient recursive formula for the calculation of system state probabilities. The proposed analytical model has been validated through simulation experiments, which show good accuracy of the derived results.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124106237","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":"The Moving Extended N-Cells handover algorithm in vehicular radio-over-fiber networks at 60GHz","authors":"N. Tselikas, E. Kosmatos, A. Boucouvalas","doi":"10.1109/CAMAD.2014.7033226","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033226","url":null,"abstract":"The paper presents a candidate handover algorithm, i.e., the “Moving Extended N-Cells” (MENC algorithm), that supports high end-user mobility in vehicular Radio-over-Fiber Networks at 60 GHz and minimizes packet losses. The mathematical analysis regarding packet loss is presented against the corresponding “traditional” handover algorithm and it is then verified by the corresponding simulation study. The paper concludes by presenting the respective results.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131305854","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":"Bit-error-rate performance of semiconductor optical amplifiers in negative exponential fading","authors":"N. Sagias, K. Yiannopoulos, A. Boucouvalas","doi":"10.1109/CAMAD.2014.7033228","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033228","url":null,"abstract":"We present analytical relations for estimating the bit-error-rate performance of semiconductor optical amplifier assisted outdoor optical wireless systems in the presence of negative-exponential fading. The relations are derived by associating the optical signal and noise powers with the channel state and are utilized to assess the system performance in terms of first and order statistics. We demonstrate that both first order (average bit-error-rate and outage probability) and second order (average fade duration) statistics are improved by a significant factor, since the deployment of the amplifier leads to a considerably reduced receiver sensitivity.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130615508","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 cluster analysis approach for the determination of a fall risk level classification","authors":"C. Barelle, N. Houel, D. Koutsouris","doi":"10.1109/CAMAD.2014.7033220","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033220","url":null,"abstract":"Falls among elderly people have massive social and economic impact. Gait impairments correlated with loss of physical functions are the primary common causes. Today, even if gait deviations between healthy young individuals and elderly ones have been deeply investigated, no standardize fall risk classification have been really established to facilitate fall risk management and prevention. Therefore, the core of this study is to implement a statistic approach to determine a fall risks classification i.e. normal gait, abnormal gait without risk of falling and abnormal gait with risk of falling. In this paper, the method based on a cluster analysis to set up this fall risk level classification is presented. Based on a limited number of easily accessible biomechanics predictors, a fall risk level can be determined and help care providers to earlier and better prevent fall.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114533432","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}
E. Markakis, Charalampos Skiannis, A. Sideris, G. Alexiou, E. Pallis
{"title":"A broadcast aware P2P mechanism for improving BitTorrent content delivery","authors":"E. Markakis, Charalampos Skiannis, A. Sideris, G. Alexiou, E. Pallis","doi":"10.1109/CAMAD.2014.7033240","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033240","url":null,"abstract":"In this paper, we present how we could benefit from the transmitted data of a broadcast link in order to achieve optimized performance of P2P content distribution. In this context, the paper elaborates on a prototype broadcast-aware P2P mechanism (namely BAP2P) that assists content distribution among users located in different CMNs by minimising redundant traffic in the downlink stream, thus providing enhanced scalability and optimised performance. The mechanism is evaluated based on `Download Completion Time' and the `Block exchanged' over the DVB-T network and the results indicate the validity of the Mechanism presented.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116659051","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":"The hunter: Tracking randomly moving WBAN targets","authors":"Kyriakos K. Skafas, T. Lagkas, G. Eleftherakis","doi":"10.1109/CAMAD.2014.7033222","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033222","url":null,"abstract":"Wireless Sensor Networks are often large networks comprised of nodes that monitor through sensors interesting targets. Wireless Body Area Networks are always small networks that often monitor the health of a single human subject. Although WBANs are limited in size, the information they monitor is urgent and important. Information from a WBAN producer may be transmitted over a WSN to the intended consumer.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129572750","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":"Bandwidth sensing errors in network systems: A case study of video rate adaptation","authors":"K. Ravindran, Xiliang Liu","doi":"10.1109/CAMAD.2014.7033261","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033261","url":null,"abstract":"Sensing errors may occur in the form of inaccurate and/or delayed reporting of system and/or external events. For example, the reports of traffic congestion on a road may be imprecise: both in the time of occurrence and the traffic intensity level, due to the very nature of traffic sampling and analysis processes. The sensing errors may skew the control actions performed by an adaptive network system S on its external environmentand hence contribute to control errors. In our approach, a model-based treatment of sensing errors allows quantifying their impact on the control accuracy. Our paper describes a software cybernetics framework to deal with the measurement errors on available network bandwidth that arise during the operations of a bandwidth-adaptive video transport system.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122459009","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":"Reverse direction transmissions and network coding for energy-efficient Wi-Fi networks","authors":"Raúl Palacios, D. Kliazovich, F. Granelli","doi":"10.1109/CAMAD.2014.7033214","DOIUrl":"https://doi.org/10.1109/CAMAD.2014.7033214","url":null,"abstract":"This paper proposes a combination of the Reverse Direction Protocol (RDP) defined in the IEEE 802.11n and the Network Coding (NC) technique to improve the energy efficiency of wireless networks based on the IEEE 802.11. The aim of the combined approach, named BidCode, is to allow intermediate nodes to combine several received packets into coded packets and immediately forward them upon successful reception of data. The energy efficiency of BidCode is analyzed in this paper and compared to those of the Distributed Coordination Function (DCF) and an important NC protocol based on IEEE 802.11, called COPE. Both analytical and simulation results show the high energy efficiency of BidCode with gains of up to 350% and 130% when compared to DCF and COPE, respectively.","PeriodicalId":111472,"journal":{"name":"2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124335950","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}