Pub Date : 2010-11-01DOI: 10.1109/ISABEL.2010.5702788
Alireza Borhani, S. Akhlaghi
This paper concerns delay analysis for Fair Power Allocation Strategy (FPAS) in multi antenna Broadcast Channel (BC). It is assumed the transmitter aims at sending individual information to a large number of single-antenna users (n) through a common wireless channel. Assuming there is a total transmit power constraint, the FPAS attempts to select the maximum number of active users in which each can receive the minimum rate constraint of Rmin. Noting this and assuming the system delay is defined as the minimum number of channel uses such that each user with probability approaching one is selected at least once, we show that for the case of single-antenna BC, the expected delay of FPAS scales as Rmin n logn/loglogn + ω(n/loglogn). Then, using our earlier proposed FPAS for multi-antenna BC, it is shown the expected delay of this strategy behaves like Rmin n logn/M loglogn−θ(1) + ω(n/loglogn), where M denotes the number of transmit antennas. Moreover, it is shown for sufficiently large (k) number of channel uses, the average number of services received by a randomly selected user for single-antenna and multi-antenna BC scale as k loglogn/nRmin (1+O(√logk/k)) and kM loglogn/nRmin (1+O(√logk/k)), respectively.
研究了多天线广播信道中公平功率分配策略(FPAS)的时延分析。假设发射机旨在通过公共无线信道向大量单天线用户(n)发送单个信息。假设存在总发射功率约束，FPAS尝试选择活动用户的最大数量，其中每个用户都可以接收最小速率约束Rmin。注意到这一点，并假设系统延迟被定义为信道使用的最小数量，使得每个概率接近1的用户至少被选择一次，我们表明，对于单天线BC的情况，FPAS的预期延迟规模为Rmin n logn/loglog + ω(n/loglog)。然后，使用我们之前提出的多天线BC的FPAS，表明该策略的预期延迟表现为Rmin n logn/M loglogn−θ(1) + ω(n/loglogn)，其中M表示发射天线的数量。此外，对于足够大的(k)信道使用数量，随机选择的用户接收单天线和多天线BC的平均业务量分别为k loglogn/nRmin (1+O(√logk/k))和kM loglogn/nRmin (1+O(√logk/k))。
{"title":"Delay analysis for Fair Power Allocation Strategy in multi antenna broadcast channels","authors":"Alireza Borhani, S. Akhlaghi","doi":"10.1109/ISABEL.2010.5702788","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702788","url":null,"abstract":"This paper concerns delay analysis for Fair Power Allocation Strategy (FPAS) in multi antenna Broadcast Channel (BC). It is assumed the transmitter aims at sending individual information to a large number of single-antenna users (n) through a common wireless channel. Assuming there is a total transmit power constraint, the FPAS attempts to select the maximum number of active users in which each can receive the minimum rate constraint of Rmin. Noting this and assuming the system delay is defined as the minimum number of channel uses such that each user with probability approaching one is selected at least once, we show that for the case of single-antenna BC, the expected delay of FPAS scales as Rmin n logn/loglogn + ω(n/loglogn). Then, using our earlier proposed FPAS for multi-antenna BC, it is shown the expected delay of this strategy behaves like Rmin n logn/M loglogn−θ(1) + ω(n/loglogn), where M denotes the number of transmit antennas. Moreover, it is shown for sufficiently large (k) number of channel uses, the average number of services received by a randomly selected user for single-antenna and multi-antenna BC scale as k loglogn/nRmin (1+O(√logk/k)) and kM loglogn/nRmin (1+O(√logk/k)), respectively.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128365095","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702839
Michael Horvat, Z. Bai, G. Bruck, P. Jung
In this work a space-frequency block coding (SFBC) system is considered, which is compliant to the Long-Term-Evolution (LTE) specification. The Cramer-Rao bound (CRB) for the mimimum mean-square error (MMSE) of the channel estimator for an SFBC receiver is calculated comparing optimum versus robust Wiener interpolation. Further a lower bound on the bit error ratio (BER) of a binary phase-shift keying (BPSK) modulated SFBC system with imperfect channel state information (CSI) is derived. Finally the bit error outage (BEO) of the linear Alamouti combiner in presence of log-normal fading signal-to-noise ratio (SNR) is compared for different power delay profiles (PDP).
{"title":"Lower bounds and bit error outage of the linear SFBC combiner in an LTE system with imperfect channel state information","authors":"Michael Horvat, Z. Bai, G. Bruck, P. Jung","doi":"10.1109/ISABEL.2010.5702839","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702839","url":null,"abstract":"In this work a space-frequency block coding (SFBC) system is considered, which is compliant to the Long-Term-Evolution (LTE) specification. The Cramer-Rao bound (CRB) for the mimimum mean-square error (MMSE) of the channel estimator for an SFBC receiver is calculated comparing optimum versus robust Wiener interpolation. Further a lower bound on the bit error ratio (BER) of a binary phase-shift keying (BPSK) modulated SFBC system with imperfect channel state information (CSI) is derived. Finally the bit error outage (BEO) of the linear Alamouti combiner in presence of log-normal fading signal-to-noise ratio (SNR) is compared for different power delay profiles (PDP).","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129679016","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702875
Á. Balogh, F. Kovács
In this paper a method is described for parameter extraction from murmur related to patent ductus arterio-sus (PDA) in case of preterm infants using phonocardiography. The relationship between the extracted time and frequency domain parameters and the medical parameters of the patent ductus arteriosus has been investigated. This analysis revealed that the frequency parameters of the murmur could be related to the diameter of the PDA and to the maximal blood flow velocity through the PDA. Nevertheless the results are promising, further work is needed for more reliable parameter estimation for robust verification of the mentioned relationships.
{"title":"Parameter extraction for diagnosing patent ductus arteriosus in preterm neonates using phonocardiography","authors":"Á. Balogh, F. Kovács","doi":"10.1109/ISABEL.2010.5702875","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702875","url":null,"abstract":"In this paper a method is described for parameter extraction from murmur related to patent ductus arterio-sus (PDA) in case of preterm infants using phonocardiography. The relationship between the extracted time and frequency domain parameters and the medical parameters of the patent ductus arteriosus has been investigated. This analysis revealed that the frequency parameters of the murmur could be related to the diameter of the PDA and to the maximal blood flow velocity through the PDA. Nevertheless the results are promising, further work is needed for more reliable parameter estimation for robust verification of the mentioned relationships.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123940361","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702913
A. N. Laskovski, M. Yuce
This paper presents the use of Class-E oscillators as inductive power transmitters for implanted telemetry devices that transmit information sensed by biosensors. Several Class-E oscillators are compared with an equivalent Class-E amplifier, showing higher efficiency while maintaining frequency clarity, stability and accuracy. Energy has been successfully transferred to a receiving inductor 1.5cm away, which has been rectified to produce a 1VDC signal.
{"title":"Class-E oscillators as wireless power transmitters for biomedical implants","authors":"A. N. Laskovski, M. Yuce","doi":"10.1109/ISABEL.2010.5702913","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702913","url":null,"abstract":"This paper presents the use of Class-E oscillators as inductive power transmitters for implanted telemetry devices that transmit information sensed by biosensors. Several Class-E oscillators are compared with an equivalent Class-E amplifier, showing higher efficiency while maintaining frequency clarity, stability and accuracy. Energy has been successfully transferred to a receiving inductor 1.5cm away, which has been rectified to produce a 1VDC signal.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123462675","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702865
S. Mudombi, M. Muchie
The world is experiencing an increase in both natural and man-made disasters. Different parts of the world experience varied and varying effects of the disasters depending on their physical, social, political and economic environment. These disasters have negative effects which include: loss of human and animal life; loss of property; and destruction of the livelihood systems. Given this scenario there is need to find ways of minimizing the negative effects of disasters through timely response and proper management of disasters. Technologies both old and new can help in reducing the effects of disasters in various ways. It is premised that ICTs do/can play an important role as a medium of information and communication in development and disaster response. In Africa, ICTs hold a great promise, firstly in the generation of important information, secondly its subsequent transmission, and thirdly by linking people and organisations. This paper reviews literature on the contribution of ICTs in development and disaster response from across the world, with special attention to the opportunities and challenges for Africa.
{"title":"ICTs in development and disaster response: Opportunities and challenges for Africa","authors":"S. Mudombi, M. Muchie","doi":"10.1109/ISABEL.2010.5702865","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702865","url":null,"abstract":"The world is experiencing an increase in both natural and man-made disasters. Different parts of the world experience varied and varying effects of the disasters depending on their physical, social, political and economic environment. These disasters have negative effects which include: loss of human and animal life; loss of property; and destruction of the livelihood systems. Given this scenario there is need to find ways of minimizing the negative effects of disasters through timely response and proper management of disasters. Technologies both old and new can help in reducing the effects of disasters in various ways. It is premised that ICTs do/can play an important role as a medium of information and communication in development and disaster response. In Africa, ICTs hold a great promise, firstly in the generation of important information, secondly its subsequent transmission, and thirdly by linking people and organisations. This paper reviews literature on the contribution of ICTs in development and disaster response from across the world, with special attention to the opportunities and challenges for Africa.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114195752","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702817
A. Waadt, C. Kocks, Shangbo Wang, G. Bruck, P. Jung
This paper discusses a maximum likelihood (ML) estimator for the localization of mobile nodes in communication networks. The derived estimator is optimized for ranging measurements exploiting the received signal strength (RSS). For this purpose, the bias and uncertainties of the RSS based ranging procedure are analyzed, considering a path loss model of an indoor ultra-wideband (UWB) network under line of sight (LOS) conditions. The nonlinearity of the path loss model is first taken into account before the statistics of the observed RSS are approximated by a Taylor sequence of first order. The so found metrics describe a weighted least squares (WLS) method. The metrics of the estimator are analytically derived in closed-form. The performance of the derived estimator is investigated in Monte-Carlo simulations and compared with a simple least squares (LS) method and another method exploiting RSS fingerprints.
{"title":"Maximum likelihood localization estimation based on received signal strength","authors":"A. Waadt, C. Kocks, Shangbo Wang, G. Bruck, P. Jung","doi":"10.1109/ISABEL.2010.5702817","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702817","url":null,"abstract":"This paper discusses a maximum likelihood (ML) estimator for the localization of mobile nodes in communication networks. The derived estimator is optimized for ranging measurements exploiting the received signal strength (RSS). For this purpose, the bias and uncertainties of the RSS based ranging procedure are analyzed, considering a path loss model of an indoor ultra-wideband (UWB) network under line of sight (LOS) conditions. The nonlinearity of the path loss model is first taken into account before the statistics of the observed RSS are approximated by a Taylor sequence of first order. The so found metrics describe a weighted least squares (WLS) method. The metrics of the estimator are analytically derived in closed-form. The performance of the derived estimator is investigated in Monte-Carlo simulations and compared with a simple least squares (LS) method and another method exploiting RSS fingerprints.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126199920","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702888
M. Teplan, M. Paluš, M. Vejmelka
Phase synchronization and directionality of human EEG data recorded under influence of audio-visual stimulation were investigated. EEG data came from 6 healthy volunteers repeatedly exposed to 20 min stimulation that comprised intervals with steady stimulation at 4 and 17 Hz. Entrainment of the brain waves and phase synchronization both significantly increased during the stimulation in comparison to nonstimulating conditions accross the whole cortex. Positive correlation of entrainment and phase synchronization was obtained. Directionality analysis suggests that applied methods may estimate direction of information flow from visual processing centers towards frontal cortex locations.
{"title":"EEG phase synchronization and information flow during audio-visual stimulation","authors":"M. Teplan, M. Paluš, M. Vejmelka","doi":"10.1109/ISABEL.2010.5702888","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702888","url":null,"abstract":"Phase synchronization and directionality of human EEG data recorded under influence of audio-visual stimulation were investigated. EEG data came from 6 healthy volunteers repeatedly exposed to 20 min stimulation that comprised intervals with steady stimulation at 4 and 17 Hz. Entrainment of the brain waves and phase synchronization both significantly increased during the stimulation in comparison to nonstimulating conditions accross the whole cortex. Positive correlation of entrainment and phase synchronization was obtained. Directionality analysis suggests that applied methods may estimate direction of information flow from visual processing centers towards frontal cortex locations.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126226511","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702834
A. Vießmann, C. Kocks, M. Al-Olofi, Shangbo Wang, G. Bruck, P. Jung
This paper proposes a combined UWB LDR-LT/HDR structure and cooperation possibilities between both systems. A possible structure that utilizes the LDR physical layer to transmit and receive the HDR signaling information for an improved system performance with reduced power consumption is investigated. In addition, an adaption layer is proposed which organizes the cooperation between the two systems by following newly developed protocols. The system performance of the combined system is discussed as well.
{"title":"Combination aspects of low and high data rate ultra-wideband devices","authors":"A. Vießmann, C. Kocks, M. Al-Olofi, Shangbo Wang, G. Bruck, P. Jung","doi":"10.1109/ISABEL.2010.5702834","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702834","url":null,"abstract":"This paper proposes a combined UWB LDR-LT/HDR structure and cooperation possibilities between both systems. A possible structure that utilizes the LDR physical layer to transmit and receive the HDR signaling information for an improved system performance with reduced power consumption is investigated. In addition, an adaption layer is proposed which organizes the cooperation between the two systems by following newly developed protocols. The system performance of the combined system is discussed as well.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122002344","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702813
G. Fenu, G. Steri
Assessing the progress made during post-traumatic rehabilitation does not always involve monitoring tools which allow to objectively record the rehabilitation activity and its comparison with a standard activity. IMUs (Inertial Measurement Units) are often used in this area for assessing a specific movement which is relevant to the diagnosis of a particular disease or trauma. The evaluation is predominantly based on the analysis of the sensors output waveform in which a pattern can be recognized or the initial and the final positions of the movement detected. Using IMUs composed of tri-axial digital accelerometers and gyroscopes, we have attempted to obtain the actual trajectory of the whole movement, in order to track basic exercises related to specific planes of movement and/or rotation. In this paper we will explain how the techniques used can be exploited in a system for assessing post-traumatic rehabilitation for obtaining an immediate visual result of the activity done by the patient, precise monitoring, a comparison and (automatic) evaluation according to a standard rehabilitation protocol.
{"title":"IMU based post-traumatic rehabilitation assessment","authors":"G. Fenu, G. Steri","doi":"10.1109/ISABEL.2010.5702813","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702813","url":null,"abstract":"Assessing the progress made during post-traumatic rehabilitation does not always involve monitoring tools which allow to objectively record the rehabilitation activity and its comparison with a standard activity. IMUs (Inertial Measurement Units) are often used in this area for assessing a specific movement which is relevant to the diagnosis of a particular disease or trauma. The evaluation is predominantly based on the analysis of the sensors output waveform in which a pattern can be recognized or the initial and the final positions of the movement detected. Using IMUs composed of tri-axial digital accelerometers and gyroscopes, we have attempted to obtain the actual trajectory of the whole movement, in order to track basic exercises related to specific planes of movement and/or rotation. In this paper we will explain how the techniques used can be exploited in a system for assessing post-traumatic rehabilitation for obtaining an immediate visual result of the activity done by the patient, precise monitoring, a comparison and (automatic) evaluation according to a standard rehabilitation protocol.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122263809","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 : 2010-11-01DOI: 10.1109/ISABEL.2010.5702777
R. Pal, B. Gupta, E. Cianca, Aditya Patel, Sivaditya Kaligotla, Anupam Gogar, S. Wardana, V. Lam, Bodhisattwa Ganguly
Current advances in wireless sensor networks have contributed to the development of multi-hop wireless body sensor networks (WBSNs). These networks, which are primarily comprised of low-power sensor nodes, provide long term health and physiological monitoring of patients without obstructing their normal activities. However, the time-varying nature of network resources poses a significant challenge to the high reliability of operations required of a body sensor network. In this paper, we address the problem of reliability optimization in multi-hop WBSNs, where the nodes co-operate with each other in maximizing system performance. We model our problem as a co-operative game which inherently induces a distributed mechanism that optimizes the reliability of network operations in a multi-hop WBSN supporting concurrent applications. By the term ‘reliability’, we imply the system utility generated when each sensor node (user) services its specific application. We denote the system utility as an instance of the vector of utilities of individual users, where each user's utility is a function of its allocated bandwidth. Our mechanism jointly accounts for the dynamistic nature of the wireless medium, application quality of service, user fairness in achieving the resources to service applications, and results in an optimal operating point (utility vector) at which the WBSN should operate. We arrive at the result that the Nash bargaining solution of the co-operative game gives us the optimal system operating point, i.e., the Nash bargaining solution optimizes the overall system reliability.
{"title":"Playing ‘games’ with human health the role of game theory in optimizing reliability in wireless health networks","authors":"R. Pal, B. Gupta, E. Cianca, Aditya Patel, Sivaditya Kaligotla, Anupam Gogar, S. Wardana, V. Lam, Bodhisattwa Ganguly","doi":"10.1109/ISABEL.2010.5702777","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702777","url":null,"abstract":"Current advances in wireless sensor networks have contributed to the development of multi-hop wireless body sensor networks (WBSNs). These networks, which are primarily comprised of low-power sensor nodes, provide long term health and physiological monitoring of patients without obstructing their normal activities. However, the time-varying nature of network resources poses a significant challenge to the high reliability of operations required of a body sensor network. In this paper, we address the problem of reliability optimization in multi-hop WBSNs, where the nodes co-operate with each other in maximizing system performance. We model our problem as a co-operative game which inherently induces a distributed mechanism that optimizes the reliability of network operations in a multi-hop WBSN supporting concurrent applications. By the term ‘reliability’, we imply the system utility generated when each sensor node (user) services its specific application. We denote the system utility as an instance of the vector of utilities of individual users, where each user's utility is a function of its allocated bandwidth. Our mechanism jointly accounts for the dynamistic nature of the wireless medium, application quality of service, user fairness in achieving the resources to service applications, and results in an optimal operating point (utility vector) at which the WBSN should operate. We arrive at the result that the Nash bargaining solution of the co-operative game gives us the optimal system operating point, i.e., the Nash bargaining solution optimizes the overall system reliability.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"263 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115847011","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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