Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247591
Hongyu Xiang, Y. Yu, Zhongyuan Zhao, Yong Li, M. Peng
The dynamic stochastic resource optimization problem in heterogeneous cloud radio access networks (H-CRANs) is researched in this paper, characterizing the cooperative beam-forming with fronthaul capacity and queue stability constraints. To make the average energy efficiency (EE) of remote radio heads (RRHs) arbitrarily close to the optimum and maintain system queue stability, the EE optimization problem considering congestion control is presented. Under the Lyapunov framework, the problem is reformulated as an optimal network-wide beam-former design of RRHs, which is solved through a generalized weighted minimum mean square error (WMMSE) approach. The mathematical analysis and simulation results demonstrate that an EE-delay tradeoff can be achieved by the proposed algorithm.
{"title":"Tradeoff between energy efficiency and queues delay in heterogeneous cloud radio access networks","authors":"Hongyu Xiang, Y. Yu, Zhongyuan Zhao, Yong Li, M. Peng","doi":"10.1109/ICCW.2015.7247591","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247591","url":null,"abstract":"The dynamic stochastic resource optimization problem in heterogeneous cloud radio access networks (H-CRANs) is researched in this paper, characterizing the cooperative beam-forming with fronthaul capacity and queue stability constraints. To make the average energy efficiency (EE) of remote radio heads (RRHs) arbitrarily close to the optimum and maintain system queue stability, the EE optimization problem considering congestion control is presented. Under the Lyapunov framework, the problem is reformulated as an optimal network-wide beam-former design of RRHs, which is solved through a generalized weighted minimum mean square error (WMMSE) approach. The mathematical analysis and simulation results demonstrate that an EE-delay tradeoff can be achieved by the proposed algorithm.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"25 1","pages":"2727-2731"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77677390","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247187
Quang-Dung Ho, Anh Tuan Dang, T. Le-Ngoc
This paper presents the design and implementation of an intelligent vital sign capture platform, namely uVS, which provides end-to-end connectivity between patient monitors and Electronic Healthcare Record (EHR) and remote medical staff by employing multiple communications technologies. By replacing manual operation with computer-assisted workflow and ubiquitous networking, uVS aims to enhance reliability, save time and costs for patient's monitoring routines carried out in hospitals, clinics and emergency sites. Using advanced wireless communications technologies, it allows medical staff to access to patient health conditions from EHR from anywhere at anytime in order to have fast and efficient responses to emergency situations. Network architecture and system design of uVS are first presented. Communications protocols to enable data exchange between various system entities are explained. Finally, system prototypes and preliminary experiment results are presented.
{"title":"A ubiquitous multiple-radio patient vital sign capture platform","authors":"Quang-Dung Ho, Anh Tuan Dang, T. Le-Ngoc","doi":"10.1109/ICCW.2015.7247187","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247187","url":null,"abstract":"This paper presents the design and implementation of an intelligent vital sign capture platform, namely uVS, which provides end-to-end connectivity between patient monitors and Electronic Healthcare Record (EHR) and remote medical staff by employing multiple communications technologies. By replacing manual operation with computer-assisted workflow and ubiquitous networking, uVS aims to enhance reliability, save time and costs for patient's monitoring routines carried out in hospitals, clinics and emergency sites. Using advanced wireless communications technologies, it allows medical staff to access to patient health conditions from EHR from anywhere at anytime in order to have fast and efficient responses to emergency situations. Network architecture and system design of uVS are first presented. Communications protocols to enable data exchange between various system entities are explained. Finally, system prototypes and preliminary experiment results are presented.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"1 1","pages":"253-258"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79974835","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247504
M. N. Hasan, K. Anwar
In this paper, we consider multiway relay networks with massive number of users. In this situation a fixed transmission scheduling is difficult to apply. We propose uncoordinated communications using the concept of coded slotted ALOHA (CSA), where simultaneous transmitted signals are detected using iterative demapping (IDM) algorithm to improve the success rate probability. We allow each user to transmit the information via any random time slots (during the contention period) to the network. We show the bound of the proposed system and confirm an achievable point using practical coding. We also evaluate the bit-error-rate (BER) performance of the proposed technique via computer simulations. The results indicate that even though with the offered traffic of 1.11 packets/slot, reliable communications is achievable. It is also validated that the proposed system works very well even in relatively low signal-to-noise ratio (SNR) environments. Moreover, the packet-loss-rate (PLR) evaluation shows that the proposed technique outperforms the conventional CSA without simultaneous detection algorithm.
{"title":"Massive uncoordinated multiway relay networks with simultaneous detections","authors":"M. N. Hasan, K. Anwar","doi":"10.1109/ICCW.2015.7247504","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247504","url":null,"abstract":"In this paper, we consider multiway relay networks with massive number of users. In this situation a fixed transmission scheduling is difficult to apply. We propose uncoordinated communications using the concept of coded slotted ALOHA (CSA), where simultaneous transmitted signals are detected using iterative demapping (IDM) algorithm to improve the success rate probability. We allow each user to transmit the information via any random time slots (during the contention period) to the network. We show the bound of the proposed system and confirm an achievable point using practical coding. We also evaluate the bit-error-rate (BER) performance of the proposed technique via computer simulations. The results indicate that even though with the offered traffic of 1.11 packets/slot, reliable communications is achievable. It is also validated that the proposed system works very well even in relatively low signal-to-noise ratio (SNR) environments. Moreover, the packet-loss-rate (PLR) evaluation shows that the proposed technique outperforms the conventional CSA without simultaneous detection algorithm.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"70 1","pages":"2175-2180"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86994688","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247374
J. Chau, T. Little
Although CMOS active pixel sensor (APS) cameras are used as receivers for low-bandwidth visible light communications (VLC), they have typically not been used to receive high-bandwidth VLC signals. However, by selectively scanning pixels on the image sensor, the sampling rate of CMOS APS pixels can be greatly improved, enabling them to capture high-bandwidth signals while maintaining the ability to scale to high image resolutions. To analyze CMOS APS image sensors for potential use in high data-rate applications, the CMOS active pixel is modeled as a linear shift-invariant (LSI) system. Using this LSI model, the frequency response (as a function of device and timing parameters) and the optimal exposure time for each sample are derived. The LSI model is also used to investigate the effects of clock-jitter on CMOS APS VLC receivers.
{"title":"Analysis of CMOS active pixel sensors as linear shift-invariant receivers","authors":"J. Chau, T. Little","doi":"10.1109/ICCW.2015.7247374","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247374","url":null,"abstract":"Although CMOS active pixel sensor (APS) cameras are used as receivers for low-bandwidth visible light communications (VLC), they have typically not been used to receive high-bandwidth VLC signals. However, by selectively scanning pixels on the image sensor, the sampling rate of CMOS APS pixels can be greatly improved, enabling them to capture high-bandwidth signals while maintaining the ability to scale to high image resolutions. To analyze CMOS APS image sensors for potential use in high data-rate applications, the CMOS active pixel is modeled as a linear shift-invariant (LSI) system. Using this LSI model, the frequency response (as a function of device and timing parameters) and the optimal exposure time for each sample are derived. The LSI model is also used to investigate the effects of clock-jitter on CMOS APS VLC receivers.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"4 1","pages":"1398-1403"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90142288","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247189
Enea Cippitelli, Samuele Gasparrini, E. Gambi, S. Spinsante, Jonas Wåhslén, I. Orhan, T. Lindh
Ambient Assisted Living applications often need to integrate data from multiple sensors, to provide consistent information on the observed phenomena. Data fusion based on samples from several sensors requires accurate time synchronization with sufficient resolution, depending on the sensor sampling frequency. This work presents a technical platform for the efficient and accurate synchronization of the data captured from RGB-Depth cameras and wearable inertial sensors, that can be integrated in AAL solutions. A case study of sensor data fusion for Timed Up and Go test is also presented and discussed.
{"title":"Time synchronization and data fusion for RGB-Depth cameras and inertial sensors in AAL applications","authors":"Enea Cippitelli, Samuele Gasparrini, E. Gambi, S. Spinsante, Jonas Wåhslén, I. Orhan, T. Lindh","doi":"10.1109/ICCW.2015.7247189","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247189","url":null,"abstract":"Ambient Assisted Living applications often need to integrate data from multiple sensors, to provide consistent information on the observed phenomena. Data fusion based on samples from several sensors requires accurate time synchronization with sufficient resolution, depending on the sensor sampling frequency. This work presents a technical platform for the efficient and accurate synchronization of the data captured from RGB-Depth cameras and wearable inertial sensors, that can be integrated in AAL solutions. A case study of sensor data fusion for Timed Up and Go test is also presented and discussed.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"66 1","pages":"265-270"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91007534","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247359
A. Puglielli, Nathan Narevsky, Pengpeng Lu, T. Courtade, G. Wright, B. Nikolić, E. Alon
Massive MIMO is envisioned as one of the key enabling technologies for 5G wireless and beyond. While utilizing the spatial dimension to reduce interference and increase capacity in multi-user scenarios, massive MIMO base stations present several unique implementation challenges due to their large physical size and the high datarate generated by all the elements. To be cost-effective and energy efficient, practical designs must leverage the particular characteristics of massive MIMO to ensure scalability. Here, we propose an array architecture based on a common module which serves a small number of antennas with RF transceivers, data converters, and several support functions. Multiple chips are tiled into a grid and interconnected through a digital nearest-neighbor mesh network, avoiding the severe problems associated with analog signal distribution. Scalability across a wide range of array sizes is achieved by using distributed beamforming algorithms. It is demonstrated that by using this approach, the maximum backhaul datarate scales as the number of users rather than the number of antennas. Finally, we present a detailed accounting of the power consumption of the array and use the resulting optimization problem to show that per-element overhead limits the minimum achievable power consumption.
{"title":"A scalable massive MIMO array architecture based on common modules","authors":"A. Puglielli, Nathan Narevsky, Pengpeng Lu, T. Courtade, G. Wright, B. Nikolić, E. Alon","doi":"10.1109/ICCW.2015.7247359","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247359","url":null,"abstract":"Massive MIMO is envisioned as one of the key enabling technologies for 5G wireless and beyond. While utilizing the spatial dimension to reduce interference and increase capacity in multi-user scenarios, massive MIMO base stations present several unique implementation challenges due to their large physical size and the high datarate generated by all the elements. To be cost-effective and energy efficient, practical designs must leverage the particular characteristics of massive MIMO to ensure scalability. Here, we propose an array architecture based on a common module which serves a small number of antennas with RF transceivers, data converters, and several support functions. Multiple chips are tiled into a grid and interconnected through a digital nearest-neighbor mesh network, avoiding the severe problems associated with analog signal distribution. Scalability across a wide range of array sizes is achieved by using distributed beamforming algorithms. It is demonstrated that by using this approach, the maximum backhaul datarate scales as the number of users rather than the number of antennas. Finally, we present a detailed accounting of the power consumption of the array and use the resulting optimization problem to show that per-element overhead limits the minimum achievable power consumption.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"33 1","pages":"1310-1315"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73810352","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247397
Dinh Nguyen, M. Fukushima, Kohei Sugiyama, A. Tagami
One advantage of content-centric networking lies in its built-in support for multipath forwarding. In this paper, we propose a multipath forwarding strategy in order to fully utilize available bandwidth in a content-centric network. Using the proposed strategy, each intermediate router sensibly adjusts the amount of traffic forwarded over a given face (among a set of faces) associated with a content name based on the estimated available bandwidth it observes receiving the content through the face. Available bandwidth is sampled and estimated from the actual Data packet flow received at the face. The advantage of our method is that forwarding decision closely matches the congestion status of the forwarding face which results in efficient bandwidth utilization without biasing short round-trip time routes. What is more, by aggregating congestion control states at end users, our method requires neither route labeling nor any other kind of cooperation among routers on the delivery paths. Simulations confirm the effectiveness of our proposed scheme.
{"title":"Efficient multipath forwarding and congestion control without route-labeling in CCN","authors":"Dinh Nguyen, M. Fukushima, Kohei Sugiyama, A. Tagami","doi":"10.1109/ICCW.2015.7247397","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247397","url":null,"abstract":"One advantage of content-centric networking lies in its built-in support for multipath forwarding. In this paper, we propose a multipath forwarding strategy in order to fully utilize available bandwidth in a content-centric network. Using the proposed strategy, each intermediate router sensibly adjusts the amount of traffic forwarded over a given face (among a set of faces) associated with a content name based on the estimated available bandwidth it observes receiving the content through the face. Available bandwidth is sampled and estimated from the actual Data packet flow received at the face. The advantage of our method is that forwarding decision closely matches the congestion status of the forwarding face which results in efficient bandwidth utilization without biasing short round-trip time routes. What is more, by aggregating congestion control states at end users, our method requires neither route labeling nor any other kind of cooperation among routers on the delivery paths. Simulations confirm the effectiveness of our proposed scheme.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"204 1","pages":"1533-1538"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73821521","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247456
L. Tang, Hao Chen
Cloud federation paradigm can help cloud providers (CPs) to overcome resource limitation during spikes in demand, by outsourcing requests to other CPs with idle resources in federation. In this paper, we consider a broker-based market where multiple CPs compete to lease multiple CPs with idle resources for request outsourcing. We propose an iterative double auction mechanism that ensures the efficient operation of the market by maximizing the social welfare of the federation. The proposed scheme takes into account the particular characteristics of request outsourcing in cloud federation, such as the average response time requirement of CPs and the coupling of CPs' outsourcing decisions. Moreover, this scheme does not require the full information of CPs, and achieves a non-negative revenue for the broker.
{"title":"Double auction mechanism for request outsourcing in cloud federation","authors":"L. Tang, Hao Chen","doi":"10.1109/ICCW.2015.7247456","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247456","url":null,"abstract":"Cloud federation paradigm can help cloud providers (CPs) to overcome resource limitation during spikes in demand, by outsourcing requests to other CPs with idle resources in federation. In this paper, we consider a broker-based market where multiple CPs compete to lease multiple CPs with idle resources for request outsourcing. We propose an iterative double auction mechanism that ensures the efficient operation of the market by maximizing the social welfare of the federation. The proposed scheme takes into account the particular characteristics of request outsourcing in cloud federation, such as the average response time requirement of CPs and the coupling of CPs' outsourcing decisions. Moreover, this scheme does not require the full information of CPs, and achieves a non-negative revenue for the broker.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"6 1","pages":"1889-1894"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73522592","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247541
Laurent Gallo, Jérôme Härri
Self-Organizing TDMA (S-TDMA) is a channel access technique based on a time-slotted channel and distributed slot reservation procedure. It is considered as a valid alternative to the Dedicated Short Range Communication (DSRC) standard for safety-critical (V2X) communications, because of its stable deterministic access opportunity and delay under various channel loads. This paper provides an analytical model of S-TDMA to compute the Slot Occupation Distribution and Packet Level Incoordination in closed-form expression. By means of the proposed model, we then provide an asymptotic evaluation of the impact of various configuration parameters on the communication performance of S-TDMA.
{"title":"Analytical study of Self Organizing TDMA for V2X communications","authors":"Laurent Gallo, Jérôme Härri","doi":"10.1109/ICCW.2015.7247541","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247541","url":null,"abstract":"Self-Organizing TDMA (S-TDMA) is a channel access technique based on a time-slotted channel and distributed slot reservation procedure. It is considered as a valid alternative to the Dedicated Short Range Communication (DSRC) standard for safety-critical (V2X) communications, because of its stable deterministic access opportunity and delay under various channel loads. This paper provides an analytical model of S-TDMA to compute the Slot Occupation Distribution and Packet Level Incoordination in closed-form expression. By means of the proposed model, we then provide an asymptotic evaluation of the impact of various configuration parameters on the communication performance of S-TDMA.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"21 1","pages":"2406-2411"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74888582","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}
Pub Date : 2015-06-08DOI: 10.1109/ICCW.2015.7247192
Daniele Liciotti, G. Massi, E. Frontoni, A. Mancini, P. Zingaretti
The aim of this work is to define a fall detection video system for indoor environments based on a RGB-D sensor and a low power and low cost embedded system that processes the sensor data in order to provide a description of human activities in the field of the Ambient Assisted Living. The RGB image is affected by a high luminescence sensibility, so the depth data have the aim to improve the human activity recognition. The system is usable in a sufficiently small room and it requires a RGB-D sensor located in the center of the ceiling and an embedded system connected on a computer network. The embedded system controls the RGB-D sensor and, in the mean time, classifies the images using computer vision algorithms based on the depth map. “Water Filling” algorithm or “Multi-Level Segmentation” algorithm are used to detect person. For each person, the system detects the position with respect to the room, estimating also the human posture. Among the features extracted we enumerate the height, the head size and the distance between the head and the shoulders. The system tracks a person through the frames starting from the first identification. Further, group interactions are monitored and analyzed. The posture detection algorithm takes into account the distance between the person head and the floor during the time. During the experimental phase, conducted in many domestic scenarios, the effectiveness of the proposed solution has been proved, that is fast, accurate and ables to provide a fall map in-home fall risk assessment.
{"title":"Human activity analysis for in-home fall risk assessment","authors":"Daniele Liciotti, G. Massi, E. Frontoni, A. Mancini, P. Zingaretti","doi":"10.1109/ICCW.2015.7247192","DOIUrl":"https://doi.org/10.1109/ICCW.2015.7247192","url":null,"abstract":"The aim of this work is to define a fall detection video system for indoor environments based on a RGB-D sensor and a low power and low cost embedded system that processes the sensor data in order to provide a description of human activities in the field of the Ambient Assisted Living. The RGB image is affected by a high luminescence sensibility, so the depth data have the aim to improve the human activity recognition. The system is usable in a sufficiently small room and it requires a RGB-D sensor located in the center of the ceiling and an embedded system connected on a computer network. The embedded system controls the RGB-D sensor and, in the mean time, classifies the images using computer vision algorithms based on the depth map. “Water Filling” algorithm or “Multi-Level Segmentation” algorithm are used to detect person. For each person, the system detects the position with respect to the room, estimating also the human posture. Among the features extracted we enumerate the height, the head size and the distance between the head and the shoulders. The system tracks a person through the frames starting from the first identification. Further, group interactions are monitored and analyzed. The posture detection algorithm takes into account the distance between the person head and the floor during the time. During the experimental phase, conducted in many domestic scenarios, the effectiveness of the proposed solution has been proved, that is fast, accurate and ables to provide a fall map in-home fall risk assessment.","PeriodicalId":6464,"journal":{"name":"2015 IEEE International Conference on Communication Workshop (ICCW)","volume":"44 1","pages":"284-289"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72815680","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}
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