Pub Date : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534969
Michela Papandrea
A lot of work has already been done on the area of localization of mobile nodes, but there still exist numerous open issues. The constant progress in technology gives the opportunity to obtain efficient, in terms of cost and accuracy, localization services, and likewise it increases the number of challenges to be considered. The main problems related to the localization of mobile devices concern with the heterogeneity of visited environments and interested hardware platforms, the energy and computational constraints imposed by the devices and the choice of appropriate tracking technologies. The most important goal in the localization research area is to provide a very accurate positioning service, regardless the surrounding environment. For my PhD research I propose an innovative system for ubiquitous localization which does not rely on backend servers (each node performs a self-localization) and whose reference platform is a new generation mobile phone. This system exploits the sensors embedded on such devices to perform positioning and it is further assisted by opportunistic exchange of information among neighboring nodes. By means of this system, a node is able to classify its movements by continuously refining a self-movement-model (machine learning techniques), thus assisting the localization procedure itself. The purpose of this document is to briefly describe the state of the art in localization, and to outline my planned PhD research.
{"title":"Opportunistically supported ubiquitous localization: Machine learning enhancements","authors":"Michela Papandrea","doi":"10.1109/WOWMOM.2010.5534969","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534969","url":null,"abstract":"A lot of work has already been done on the area of localization of mobile nodes, but there still exist numerous open issues. The constant progress in technology gives the opportunity to obtain efficient, in terms of cost and accuracy, localization services, and likewise it increases the number of challenges to be considered. The main problems related to the localization of mobile devices concern with the heterogeneity of visited environments and interested hardware platforms, the energy and computational constraints imposed by the devices and the choice of appropriate tracking technologies. The most important goal in the localization research area is to provide a very accurate positioning service, regardless the surrounding environment. For my PhD research I propose an innovative system for ubiquitous localization which does not rely on backend servers (each node performs a self-localization) and whose reference platform is a new generation mobile phone. This system exploits the sensors embedded on such devices to perform positioning and it is further assisted by opportunistic exchange of information among neighboring nodes. By means of this system, a node is able to classify its movements by continuously refining a self-movement-model (machine learning techniques), thus assisting the localization procedure itself. The purpose of this document is to briefly describe the state of the art in localization, and to outline my planned PhD research.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126132734","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534976
K. Thambu
This research work explains the new video coding technique known as Wyner-Ziv video coding and its transmission over fading wireless channels. We have modeled the Wyner-Ziv codec with wireless channel. Impairments of the wireless channel (both noise and fading) are considered in the improvement of the Wyner-Ziv decoder. The cross-layer structure is introduced in the Wyner-Ziv video coding technique. We have analyzed the channel noise and the correlation noise of video frames at the decoder side. Estimation of the correlation noise between the Wyner-Ziv frame and the side information is studied thoroughly and proposed the new estimation technique which is known as the bit based correlation noise estimation. Furthermore, the performance of a multiple input multiple output (MIMO) diversity scheme is investigated to overcome the channel fading effect in the reconstructed Wyner-Ziv video frame sequence.
{"title":"Wyner-Ziv video coding with error-prone wireless fading channels","authors":"K. Thambu","doi":"10.1109/WOWMOM.2010.5534976","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534976","url":null,"abstract":"This research work explains the new video coding technique known as Wyner-Ziv video coding and its transmission over fading wireless channels. We have modeled the Wyner-Ziv codec with wireless channel. Impairments of the wireless channel (both noise and fading) are considered in the improvement of the Wyner-Ziv decoder. The cross-layer structure is introduced in the Wyner-Ziv video coding technique. We have analyzed the channel noise and the correlation noise of video frames at the decoder side. Estimation of the correlation noise between the Wyner-Ziv frame and the side information is studied thoroughly and proposed the new estimation technique which is known as the bit based correlation noise estimation. Furthermore, the performance of a multiple input multiple output (MIMO) diversity scheme is investigated to overcome the channel fading effect in the reconstructed Wyner-Ziv video frame sequence.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"460 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126141465","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534979
Mauro Oliveira, Carlos Hairon R. Gonçalves, O. Andrade, Regis Moura, C. Sicotte, J. Denis, S. Fernandes, J. Gensel, José Bringel Filho, H. Martin
This paper proposes a governance decision-making framework for public health care systems. It encompasses and integrates data about family homes in a new intelligent health care information system. In order to support end-user interactions, the framework has been built on the GINGA middleware developed for the Brazilian Digital TV, whose full access will be country-wide in 2015. Based on five governance fields, namely knowledge, normative, clinical-epidemiological, administrative, and shared management, the framework relies on an Optical-WiMAX communication infrastructure (Brazilian Digital Belt), which will reach 82% of urban population in the Ceara State. In addition, we present a case study showing how the framework could be used for improving health care governance decisions.
{"title":"A context-aware framework for health care governance decision-making systems: A model based on the Brazilian Digital TV","authors":"Mauro Oliveira, Carlos Hairon R. Gonçalves, O. Andrade, Regis Moura, C. Sicotte, J. Denis, S. Fernandes, J. Gensel, José Bringel Filho, H. Martin","doi":"10.1109/WOWMOM.2010.5534979","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534979","url":null,"abstract":"This paper proposes a governance decision-making framework for public health care systems. It encompasses and integrates data about family homes in a new intelligent health care information system. In order to support end-user interactions, the framework has been built on the GINGA middleware developed for the Brazilian Digital TV, whose full access will be country-wide in 2015. Based on five governance fields, namely knowledge, normative, clinical-epidemiological, administrative, and shared management, the framework relies on an Optical-WiMAX communication infrastructure (Brazilian Digital Belt), which will reach 82% of urban population in the Ceara State. In addition, we present a case study showing how the framework could be used for improving health care governance decisions.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115601724","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534898
Ali Asim, S. Tixeuil
Recent advances in wireless sensor networks show an expansion both in the size of the network and in the variety of the applications that are to be executed. In this context, wireless network simulators play a key role in the design, development and testing of new wireless sensor networks applications and protocols. Most of the currently available wireless sensor network simulators work well for small to medium sized networks yet fail to scale to really large networks, mainly due to their single desktop machine architecture and its limited resources. In this paper, we present XS-WSNet, a wireless sensor network simulator that is designed with extreme scalability as a prime objective. First, we distribute the simulated wireless sensor network nodes on a variety of actual machines that communicate through a wired network. A large-scale simulation is then emulated by several smaller scale simulations that run concurrently and collaboratively. As smaller instances of simulations running on different machines usually induce asynchrony and non-determinism in the whole system, we also propose a distributed synchronization protocol, responsible for simulation accuracy in some simulation models. Our implementation (both asynchronized and synchronized versions) of XS-WSNet is fully evaluated in various contexts using a scalable benchmark application. Against its single machine version, the distributed simulator provides sensible matching results, exhibits both scale-up and speed-up of the simulation, and performs with linear slowdown with up to ten million simulated nodes.
{"title":"XS-WSNet: Extreme scale wireless sensor network simulation","authors":"Ali Asim, S. Tixeuil","doi":"10.1109/WOWMOM.2010.5534898","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534898","url":null,"abstract":"Recent advances in wireless sensor networks show an expansion both in the size of the network and in the variety of the applications that are to be executed. In this context, wireless network simulators play a key role in the design, development and testing of new wireless sensor networks applications and protocols. Most of the currently available wireless sensor network simulators work well for small to medium sized networks yet fail to scale to really large networks, mainly due to their single desktop machine architecture and its limited resources. In this paper, we present XS-WSNet, a wireless sensor network simulator that is designed with extreme scalability as a prime objective. First, we distribute the simulated wireless sensor network nodes on a variety of actual machines that communicate through a wired network. A large-scale simulation is then emulated by several smaller scale simulations that run concurrently and collaboratively. As smaller instances of simulations running on different machines usually induce asynchrony and non-determinism in the whole system, we also propose a distributed synchronization protocol, responsible for simulation accuracy in some simulation models. Our implementation (both asynchronized and synchronized versions) of XS-WSNet is fully evaluated in various contexts using a scalable benchmark application. Against its single machine version, the distributed simulator provides sensible matching results, exhibits both scale-up and speed-up of the simulation, and performs with linear slowdown with up to ten million simulated nodes.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116399988","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534963
L. Scalia, J. Widmer, I. Aad
Interference management is one of the most critical operations for CSMA/CA protocols. In this paper we investigate how specific PHY-layer operations, designed to mitigate the effect of interference, can cause the radio-receiver circuitry to over-estimate the channel occupation status, thus unnecessarily limiting the overall spatial reuse or impeding the synchronization to incoming frames. We individuated the root of this problem in the surprising effectiveness of the overall packet detection procedure of WLAN PHY, which allows for the demodulation of strongly attenuated 802.11 frames. The transmit spectrum mask for the IEEE 802.11 standard allows limited power leakage over adjacent channels. Such a low power signal from adjacent channels nowadays can be correctly recognized by recent OFDM/CCK receive circuitry, which has an important impact on WLAN performance. A receiver may miss the reception of packets destined to it, whenever a frame capture of a transmission on a partially overlapping channel occurs. A similar effect occurs in the transmit phase. In carrier sense mode, the OFDM/CCK receiver of the WLAN device is capable of synchronizing to the preamble of low SNR signals, thus unnecessarily deferring the channel access in case of transmissions on partially overlapping channels.
{"title":"On the side effects of packet detection sensitivity in IEEE 802.11 interference management","authors":"L. Scalia, J. Widmer, I. Aad","doi":"10.1109/WOWMOM.2010.5534963","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534963","url":null,"abstract":"Interference management is one of the most critical operations for CSMA/CA protocols. In this paper we investigate how specific PHY-layer operations, designed to mitigate the effect of interference, can cause the radio-receiver circuitry to over-estimate the channel occupation status, thus unnecessarily limiting the overall spatial reuse or impeding the synchronization to incoming frames. We individuated the root of this problem in the surprising effectiveness of the overall packet detection procedure of WLAN PHY, which allows for the demodulation of strongly attenuated 802.11 frames. The transmit spectrum mask for the IEEE 802.11 standard allows limited power leakage over adjacent channels. Such a low power signal from adjacent channels nowadays can be correctly recognized by recent OFDM/CCK receive circuitry, which has an important impact on WLAN performance. A receiver may miss the reception of packets destined to it, whenever a frame capture of a transmission on a partially overlapping channel occurs. A similar effect occurs in the transmit phase. In carrier sense mode, the OFDM/CCK receiver of the WLAN device is capable of synchronizing to the preamble of low SNR signals, thus unnecessarily deferring the channel access in case of transmissions on partially overlapping channels.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122794598","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534888
A. Ghaddar, Tahiry Razafindralambo, I. Simplot-Ryl, Samar Tawbi, Abbas Hijazi
Extending the lifetime of wireless sensor networks remains the most challenging and demanding requirement that impedes large-scale deployments. The basic operation in WSNs is the systematic gathering and transmission of sensed data to a base station for further processing. During data gathering, the amount of data can be large sometimes, due to redundant data combined from different sensing nodes in the neighborhood. Thus the data gathered need to be processed before being transmitted, in order to detect and remove redundancy, which can impact the communication traffic and energy consumption of the network in a negative way. In this paper, we propose an algorithm to measure similarity between the data collected toward the base station(relative to a specific event monitoring), so that an aggregator sensor sends a minimum amount of information to the base station in a way that the latter can deduce the source information of sensing neighbors nodes. Further, our experimental results demonstrate that the communication traffic and the number of bits transmitted can be minimized while preserving accuracy on the base station estimations.
{"title":"Algorithm for data similarity measurements to reduce data redundancy in wireless sensor networks","authors":"A. Ghaddar, Tahiry Razafindralambo, I. Simplot-Ryl, Samar Tawbi, Abbas Hijazi","doi":"10.1109/WOWMOM.2010.5534888","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534888","url":null,"abstract":"Extending the lifetime of wireless sensor networks remains the most challenging and demanding requirement that impedes large-scale deployments. The basic operation in WSNs is the systematic gathering and transmission of sensed data to a base station for further processing. During data gathering, the amount of data can be large sometimes, due to redundant data combined from different sensing nodes in the neighborhood. Thus the data gathered need to be processed before being transmitted, in order to detect and remove redundancy, which can impact the communication traffic and energy consumption of the network in a negative way. In this paper, we propose an algorithm to measure similarity between the data collected toward the base station(relative to a specific event monitoring), so that an aggregator sensor sends a minimum amount of information to the base station in a way that the latter can deduce the source information of sensing neighbors nodes. Further, our experimental results demonstrate that the communication traffic and the number of bits transmitted can be minimized while preserving accuracy on the base station estimations.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126265938","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534950
Bo Cheng, Cailian Chen, Zhezhuang Xu, Haoran Li, X. Guan
It is a very important and challenging task to localize an audio-source in wireless sensor networks (WSNs). One of efficient methods for audio-source localization is the so-called time difference of arrival (TDOA) based approach. In this paper, we propose a novel localization method based on Generalized Cross Correlation-Genetic Algorithm (GCC-GA). It utilizes GCC method to calculate the TDOA and GA to improve the localization accuracy. The proposed method is implemented in a real grid wireless sensor network. The experimental results show that the network can estimate the source location with better accuracy and lower complexity.
{"title":"Wireless sensor networks based localization for audio-source: A GCC-GA method","authors":"Bo Cheng, Cailian Chen, Zhezhuang Xu, Haoran Li, X. Guan","doi":"10.1109/WOWMOM.2010.5534950","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534950","url":null,"abstract":"It is a very important and challenging task to localize an audio-source in wireless sensor networks (WSNs). One of efficient methods for audio-source localization is the so-called time difference of arrival (TDOA) based approach. In this paper, we propose a novel localization method based on Generalized Cross Correlation-Genetic Algorithm (GCC-GA). It utilizes GCC method to calculate the TDOA and GA to improve the localization accuracy. The proposed method is implemented in a real grid wireless sensor network. The experimental results show that the network can estimate the source location with better accuracy and lower complexity.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126438884","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534928
E. Magkos, P. Kotzanikolaou, S. Sioutas, K. Oikonomou
In this paper we deal with security and historical privacy in Location Based Service (LBS) applications where users submit accurate location samples to an LBS provider. Specifically we propose a distributed scheme that establishes access control while protecting the privacy of a user in both sporadic and continuous LBS queries. Our solution employs a hybrid network architecture where LBS users: (a) are able to communicate with an LBS provider through a network (e.g., cellular) operator, and (b) they are also able to create wireless ad-hoc networks with other peers in order to obtain privacy against an adversary that performs traffic analysis. Our threat model considers the network operator, the LBS provider and other peers, as potential privacy adversaries. For historical privacy we adopt the generic approach of using multiple pseudonyms that are changed frequently. In order to establish untraceability against traffic analysis attacks, a message is not sent directly to the cellular operator, but it is distributed among mobile neighbors who act like mixes and re-encrypt a message before sending it to the LBS provider via the cellular operator. As an extension, we also discuss how to aggregate independent data from different mobile peers before sending them to the LBS provider. This approach may be suitable in applications where aggregate location data are useful (e.g., traffic monitoring and control)
{"title":"A distributed privacy-preserving scheme for location-based queries","authors":"E. Magkos, P. Kotzanikolaou, S. Sioutas, K. Oikonomou","doi":"10.1109/WOWMOM.2010.5534928","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534928","url":null,"abstract":"In this paper we deal with security and historical privacy in Location Based Service (LBS) applications where users submit accurate location samples to an LBS provider. Specifically we propose a distributed scheme that establishes access control while protecting the privacy of a user in both sporadic and continuous LBS queries. Our solution employs a hybrid network architecture where LBS users: (a) are able to communicate with an LBS provider through a network (e.g., cellular) operator, and (b) they are also able to create wireless ad-hoc networks with other peers in order to obtain privacy against an adversary that performs traffic analysis. Our threat model considers the network operator, the LBS provider and other peers, as potential privacy adversaries. For historical privacy we adopt the generic approach of using multiple pseudonyms that are changed frequently. In order to establish untraceability against traffic analysis attacks, a message is not sent directly to the cellular operator, but it is distributed among mobile neighbors who act like mixes and re-encrypt a message before sending it to the LBS provider via the cellular operator. As an extension, we also discuss how to aggregate independent data from different mobile peers before sending them to the LBS provider. This approach may be suitable in applications where aggregate location data are useful (e.g., traffic monitoring and control)","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132920351","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534949
Bingbing Liu, Xiaojun Wu, Vikas Reddy Enti, D. M. Kang, W. Liu
In this paper, aiming for mobile robot localization in indoor environments, a loosely coupled architecture, which combines indoor Real-time Locating System (RTLS) and dead reckoning (DR) system, is proposed. Within this architecture, the DR is simple and cost effective but subjected to accumulative error; the indoor RTLS can provide absolute, consistent localization estimates, therefore is complementary to DR sensors. The most outstanding feature of this architecture is that it can easily integrate any type of existing RTLS and DR sensors. Another advantage lies in the fact that this architecture adopts a linear model, thus is exempted from the risk of linearization of non-linear models. In order to verify the proposed architecture, an example localization system consisting of an ultra-wideband (UWB) RTLS system and wheel encoders based DR, on a real robot, is implemented. Experiments have been conducted on this example system and the results have demonstrated its performance.
{"title":"A RTLS/DR based localization system architecture for indoor mobile robots","authors":"Bingbing Liu, Xiaojun Wu, Vikas Reddy Enti, D. M. Kang, W. Liu","doi":"10.1109/WOWMOM.2010.5534949","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534949","url":null,"abstract":"In this paper, aiming for mobile robot localization in indoor environments, a loosely coupled architecture, which combines indoor Real-time Locating System (RTLS) and dead reckoning (DR) system, is proposed. Within this architecture, the DR is simple and cost effective but subjected to accumulative error; the indoor RTLS can provide absolute, consistent localization estimates, therefore is complementary to DR sensors. The most outstanding feature of this architecture is that it can easily integrate any type of existing RTLS and DR sensors. Another advantage lies in the fact that this architecture adopts a linear model, thus is exempted from the risk of linearization of non-linear models. In order to verify the proposed architecture, an example localization system consisting of an ultra-wideband (UWB) RTLS system and wheel encoders based DR, on a real robot, is implemented. Experiments have been conducted on this example system and the results have demonstrated its performance.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"438 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131954631","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 : 2010-06-14DOI: 10.1109/WOWMOM.2010.5534987
Guang Lu
Mobile devices supporting multiple radio technologies are becoming mainstream in the market. These devices can experience vertical handovers between heterogeneous networks due to device mobility or multiple network coverage. Handover latency is critical to ensure session continuity and end user experience. This paper presents a solution using IEEE 802.21 to enable seamless mobility for data and video streaming sessions. The solution was implemented and evaluated using commercial wireless networks and mobile devices. Lab and field trial results show minimal handover delay and improved user experience.
{"title":"Enable multimedia mobility with IEEE 802.21","authors":"Guang Lu","doi":"10.1109/WOWMOM.2010.5534987","DOIUrl":"https://doi.org/10.1109/WOWMOM.2010.5534987","url":null,"abstract":"Mobile devices supporting multiple radio technologies are becoming mainstream in the market. These devices can experience vertical handovers between heterogeneous networks due to device mobility or multiple network coverage. Handover latency is critical to ensure session continuity and end user experience. This paper presents a solution using IEEE 802.21 to enable seamless mobility for data and video streaming sessions. The solution was implemented and evaluated using commercial wireless networks and mobile devices. Lab and field trial results show minimal handover delay and improved user experience.","PeriodicalId":384628,"journal":{"name":"2010 IEEE International Symposium on \"A World of Wireless, Mobile and Multimedia Networks\" (WoWMoM)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116445852","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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