Pub Date : 2010-07-26DOI: 10.5220/0002980601830188
F. Sallabi, G. Ditsa, E. Barka, H. Khatib
Recently, new and sophisticated mobile commerce applications, especially location-based services applications, have been emerging very fast, which demands a closer attention to their use, technology and business models. As a result, new business models designed specifically for the mobile arena have started to emerge. Moreover, mobile commerce is generating considerable interest and has led to the design and development of new mobile web-based services. However these services lack a suitable business model. Brokerage firms have already setup novel and profitable business models for wired web-based services. Converting these wired web-based services into mobile services introduces new challenges. In this paper, we present a business model for dynamic location-based services. We find it very useful to introduce this novel approach to define a business model for such an application. Our focus is on the value proposition for each stakeholder involved in the application. We highlight the technical perspective and analyze the different technologies used in this application.
{"title":"Business model for emerging real-time location-based services: A technical perspective","authors":"F. Sallabi, G. Ditsa, E. Barka, H. Khatib","doi":"10.5220/0002980601830188","DOIUrl":"https://doi.org/10.5220/0002980601830188","url":null,"abstract":"Recently, new and sophisticated mobile commerce applications, especially location-based services applications, have been emerging very fast, which demands a closer attention to their use, technology and business models. As a result, new business models designed specifically for the mobile arena have started to emerge. Moreover, mobile commerce is generating considerable interest and has led to the design and development of new mobile web-based services. However these services lack a suitable business model. Brokerage firms have already setup novel and profitable business models for wired web-based services. Converting these wired web-based services into mobile services introduces new challenges. In this paper, we present a business model for dynamic location-based services. We find it very useful to introduce this novel approach to define a business model for such an application. Our focus is on the value proposition for each stakeholder involved in the application. We highlight the technical perspective and analyze the different technologies used in this application.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124718003","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 : 2010-07-26DOI: 10.5220/0002929001150122
I. Cuiñas, M. Sánchez
The use of polarisation diversity techniques in reception could be adequate to improve the performance of the wireless networks operating in deep multipath fading environments. This paper explores this possibility, and presents a procedure to estimate the received cross-polarised power from wide band measurements performed at just one polarisation. Three different strategies have been tested, and the results are presented and analysed, detecting improvements even when the multipath is low in the channel. In highly multipath rooms, the improvement in terms of received power reaches 21%.
{"title":"Improvement of wireless network performance by polarisation diversity simulation from measurement results at only one polarisation","authors":"I. Cuiñas, M. Sánchez","doi":"10.5220/0002929001150122","DOIUrl":"https://doi.org/10.5220/0002929001150122","url":null,"abstract":"The use of polarisation diversity techniques in reception could be adequate to improve the performance of the wireless networks operating in deep multipath fading environments. This paper explores this possibility, and presents a procedure to estimate the received cross-polarised power from wide band measurements performed at just one polarisation. Three different strategies have been tested, and the results are presented and analysed, detecting improvements even when the multipath is low in the channel. In highly multipath rooms, the improvement in terms of received power reaches 21%.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125837645","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 : 2010-07-26DOI: 10.5220/0002981100360041
Kuen-Liang Sue, Jing-Wei Lin
The aim of this study is to design an intelligent mechanism for exploring unknown target areas in a plant, such as oil pollution in ocean. To explore the target area efficiently, a smart sensing mechanism based on Incremental Clustering algorithm is proposed to cooperate with a small sensing network structure named Centralized SensorGroup (CSG). The operation processes and detection phases are provided and verified in the investigation. System performance is evaluated by observing the detection completeness and accuracy in different scenarios within a square experimental area of 100m∗100m. No matter when large or small scenarios are explored, simulation results demonstrate that CSG cooperated with the smart sensing mechanism has quite good detection accuracy and efficiency and can achieve the purpose of exploring target area efficiently and effectively.
{"title":"Mobile SensorGroup with smart path for detecting target area","authors":"Kuen-Liang Sue, Jing-Wei Lin","doi":"10.5220/0002981100360041","DOIUrl":"https://doi.org/10.5220/0002981100360041","url":null,"abstract":"The aim of this study is to design an intelligent mechanism for exploring unknown target areas in a plant, such as oil pollution in ocean. To explore the target area efficiently, a smart sensing mechanism based on Incremental Clustering algorithm is proposed to cooperate with a small sensing network structure named Centralized SensorGroup (CSG). The operation processes and detection phases are provided and verified in the investigation. System performance is evaluated by observing the detection completeness and accuracy in different scenarios within a square experimental area of 100m∗100m. No matter when large or small scenarios are explored, simulation results demonstrate that CSG cooperated with the smart sensing mechanism has quite good detection accuracy and efficiency and can achieve the purpose of exploring target area efficiently and effectively.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116160949","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 : 2010-07-26DOI: 10.5220/0002985200820089
Lusheng Miao, Karim D Djouani, A. Kurien, G. Noel
The energy consumption is a key design criterion for the routing protocol in wireless sensor networks. Some routing protocols deliver the message by point to point like wire networks, which may not be optimal to maximise the lifetime of the network. In this paper, a competing algorithm for GBR in wireless sensor networks is proposed. This algorithm is referred to as GBR-C. Furthermore auto-adaptable GBR-C routing protocol is proposed. The proposed schemes are compared with the GBR protocol. Simulation results show that the proposed schemes give better results than GBR in terms of energy efficiency.
{"title":"A competing algorithm for gradient based routing protocol in wireless sensor networks","authors":"Lusheng Miao, Karim D Djouani, A. Kurien, G. Noel","doi":"10.5220/0002985200820089","DOIUrl":"https://doi.org/10.5220/0002985200820089","url":null,"abstract":"The energy consumption is a key design criterion for the routing protocol in wireless sensor networks. Some routing protocols deliver the message by point to point like wire networks, which may not be optimal to maximise the lifetime of the network. In this paper, a competing algorithm for GBR in wireless sensor networks is proposed. This algorithm is referred to as GBR-C. Furthermore auto-adaptable GBR-C routing protocol is proposed. The proposed schemes are compared with the GBR protocol. Simulation results show that the proposed schemes give better results than GBR in terms of energy efficiency.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134600661","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 : 2010-07-26DOI: 10.5220/0002959100610066
J. M. Larrauri, Beñat Arejita Larrinaga, Maider Larburu Lopez, Javier Sánchez Cubillo
The use of sensors is very widespread in a lot of different environments and applications. Each situation needs a different solution and for that reason the use of a scalable and easily manageable sensor network is a must as applications are becoming increasingly complex. In many cases the perfect solution is the one based on a wireless sensor network; it provides flexibility, ease of management of the system and expandability. But in order to provide interoperability between different sensor manufacturers and to give a transparent and independent interface, the use of a standard is mandatory. This standard system is provided by the IEEE 1451 family of standard protocols. In this project a Bluetooth based sensor network has been implemented using the IEEE 1451 family of standard protocols. The goal of this network is to aid data acquisition from a number of sensors within a car, in order to monitor the wellbeing of the passengers and improve safety and comfort.
{"title":"A Bluetooth sensor network based on the IEEE 1451 standard: A sensor network solution to evaluate the wellbeing of the passenger and improve safety in cars","authors":"J. M. Larrauri, Beñat Arejita Larrinaga, Maider Larburu Lopez, Javier Sánchez Cubillo","doi":"10.5220/0002959100610066","DOIUrl":"https://doi.org/10.5220/0002959100610066","url":null,"abstract":"The use of sensors is very widespread in a lot of different environments and applications. Each situation needs a different solution and for that reason the use of a scalable and easily manageable sensor network is a must as applications are becoming increasingly complex. In many cases the perfect solution is the one based on a wireless sensor network; it provides flexibility, ease of management of the system and expandability. But in order to provide interoperability between different sensor manufacturers and to give a transparent and independent interface, the use of a standard is mandatory. This standard system is provided by the IEEE 1451 family of standard protocols. In this project a Bluetooth based sensor network has been implemented using the IEEE 1451 family of standard protocols. The goal of this network is to aid data acquisition from a number of sensors within a car, in order to monitor the wellbeing of the passengers and improve safety and comfort.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115593745","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 : 2010-07-26DOI: 10.5220/0002953201420147
N. Papaoulakis, C. Patrikakis, M. Nunes, R. Cruz
In this paper, an analysis of the different techniques for supporting robust multimedia transmission over wireless media is given. The analysis includes Radio Resource Management techniques on the Physical layer, transmission techniques on the Network (IP) layer, optimisation techniques on the Transport layer and techniques focusing on the Application layer. Also there is a report on the selection of the most efficient solutions and the way these can be combined in an integrated and cross layer optimisation solution. The paper has been prepared following the results of the research performed in the context of the ICT project my-eDirector 2012 in order to support the robust transmission of live streaming services for the coverage of athletic events for large numbers of heterogeneous networked users.
{"title":"Robust multimedia transmission over wireless and mobile networks","authors":"N. Papaoulakis, C. Patrikakis, M. Nunes, R. Cruz","doi":"10.5220/0002953201420147","DOIUrl":"https://doi.org/10.5220/0002953201420147","url":null,"abstract":"In this paper, an analysis of the different techniques for supporting robust multimedia transmission over wireless media is given. The analysis includes Radio Resource Management techniques on the Physical layer, transmission techniques on the Network (IP) layer, optimisation techniques on the Transport layer and techniques focusing on the Application layer. Also there is a report on the selection of the most efficient solutions and the way these can be combined in an integrated and cross layer optimisation solution. The paper has been prepared following the results of the research performed in the context of the ICT project my-eDirector 2012 in order to support the robust transmission of live streaming services for the coverage of athletic events for large numbers of heterogeneous networked users.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127748568","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 : 2010-07-26DOI: 10.5220/0002961400670074
P. Aloo, Karim D Djouani, B. J. Wyk, M. Odhiambo
Accurate forecasting of demand for cellular services is essential. The high infrastructure implementation costs involved plus overestimation of demand can be very costly. In addition the difference between peak and off-peak demands for wireless services can be very significant, both temporary and spatially. Gearing the network to meet peak demand would result in under-utilised network capacity most of the time. It has been suggested that real-time or dynamic pricing (variation of tariff according to network utilization) could provide an additional strategy for encouraging more efficient use of available resources. The aim of this research work is to investigate the implementation a Fuzzy Logic Controlled Dynamic Pricing (FLCDP) in a simulated cellular network for improved quality of service (QoS). Improvement in revenue collection is also investigated. Simulations were carried out using MATLAB. The results show that the network utilization is improved and an increase in the system availability and reliability: which are the two major parameters for QoS measurement. The revenue collected under FLCDP is greater than under flat rate pricing.
{"title":"Fuzzy logic based dynamic pricing scheme for provision of QoS in cellular networks","authors":"P. Aloo, Karim D Djouani, B. J. Wyk, M. Odhiambo","doi":"10.5220/0002961400670074","DOIUrl":"https://doi.org/10.5220/0002961400670074","url":null,"abstract":"Accurate forecasting of demand for cellular services is essential. The high infrastructure implementation costs involved plus overestimation of demand can be very costly. In addition the difference between peak and off-peak demands for wireless services can be very significant, both temporary and spatially. Gearing the network to meet peak demand would result in under-utilised network capacity most of the time. It has been suggested that real-time or dynamic pricing (variation of tariff according to network utilization) could provide an additional strategy for encouraging more efficient use of available resources. The aim of this research work is to investigate the implementation a Fuzzy Logic Controlled Dynamic Pricing (FLCDP) in a simulated cellular network for improved quality of service (QoS). Improvement in revenue collection is also investigated. Simulations were carried out using MATLAB. The results show that the network utilization is improved and an increase in the system availability and reliability: which are the two major parameters for QoS measurement. The revenue collected under FLCDP is greater than under flat rate pricing.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"635 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120861399","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 : 2010-07-26DOI: 10.5220/0002970401610164
A. Salim, S. Zummo, S. Al-Ghadhban
In this work we evaluate a recently proposed multiple-input multiple-output (MIMO) system called the Layered Steered Space-Time Codes (LSSTC) that combines the benefits of vertical Bell Labs space-time (VBLAST) scheme, space-time block codes (STBC) and beamforming. This evaluation is done by comparing the capacity and the error rate of LSSTC to the well-known MIMO system, known as VBLAST. For that, we derive a formula for the instantaneous capacity of single-user LSSTC. In addition, an adaptive scheme that is based on LSSTC and VBLAST systems is proposed. This scheme selects the configuration and the modulation scheme in order to improve the performance.
{"title":"A numerical comparison between LSSTC and VBLAST in wireless systems","authors":"A. Salim, S. Zummo, S. Al-Ghadhban","doi":"10.5220/0002970401610164","DOIUrl":"https://doi.org/10.5220/0002970401610164","url":null,"abstract":"In this work we evaluate a recently proposed multiple-input multiple-output (MIMO) system called the Layered Steered Space-Time Codes (LSSTC) that combines the benefits of vertical Bell Labs space-time (VBLAST) scheme, space-time block codes (STBC) and beamforming. This evaluation is done by comparing the capacity and the error rate of LSSTC to the well-known MIMO system, known as VBLAST. For that, we derive a formula for the instantaneous capacity of single-user LSSTC. In addition, an adaptive scheme that is based on LSSTC and VBLAST systems is proposed. This scheme selects the configuration and the modulation scheme in order to improve the performance.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123966388","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 : 2010-07-26DOI: 10.5220/0002894001070114
A. Ahrens, C. Benavente-Peces
In this contribution we jointly optimize the number of multiple-input multiple-output (MIMO) layers and the number of bits per symbol within an iteratively-detected multiuser MIMO downlink (DL) transmission scheme under the constraint of a given fixed data throughput and integrity. Instead of treating all the users jointly as in zero-forcing (ZF) multiuser transmission techniques, the investigated singular value decomposition (SVD) assisted DL multiuser MIMO system takes the individual user's channel characteristics into account. In analogy to bit-interleaved coded irregular modulation, we introduce a MIMO-BICM scheme, where different user-specific signal constellations and mapping arrangement were used within a single codeword. Extrinsic information transfer (EXIT) charts are used for analyzing and optimizing the convergence behaviour of the iterative demapping and decoding. Our results show that in order to achieve the best bit-error rate, not necessarily all user-specific MIMO layers have to be activated.
{"title":"Modulation-mode assignment for SVD-assisted and iteratively detected downlink multiuser MIMO transmission schemes","authors":"A. Ahrens, C. Benavente-Peces","doi":"10.5220/0002894001070114","DOIUrl":"https://doi.org/10.5220/0002894001070114","url":null,"abstract":"In this contribution we jointly optimize the number of multiple-input multiple-output (MIMO) layers and the number of bits per symbol within an iteratively-detected multiuser MIMO downlink (DL) transmission scheme under the constraint of a given fixed data throughput and integrity. Instead of treating all the users jointly as in zero-forcing (ZF) multiuser transmission techniques, the investigated singular value decomposition (SVD) assisted DL multiuser MIMO system takes the individual user's channel characteristics into account. In analogy to bit-interleaved coded irregular modulation, we introduce a MIMO-BICM scheme, where different user-specific signal constellations and mapping arrangement were used within a single codeword. Extrinsic information transfer (EXIT) charts are used for analyzing and optimizing the convergence behaviour of the iterative demapping and decoding. Our results show that in order to achieve the best bit-error rate, not necessarily all user-specific MIMO layers have to be activated.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122632467","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 : 2010-07-26DOI: 10.5220/0003032601950201
Ory Chowaw-Liebman, Uta Christoph, Karl-Heinz Krempels, Christoph Terwelp
Until now navigation aids have primarily focused on outdoor scenarios, whether driving on highways or, more recently, walking through cities. These systems use the Global Positioning System (GPS) for position information. Indoor navigation however cannot rely on GPS data, as the signals do not penetrate building structure. Thus other techniques are required to provide position information indoors. In this article the approach to an indoor navigation system based on the position information provided by the Device Whispering technique is presented. The position information acquired by Device Whispering is less precise than information acquired by the Fingerprinting technique but more robust. To compensate the deficit of precision the position information is combined with a movement model. This movement model is automatically generated from the maps which are already required for navigation.
{"title":"Evaluation of an indoor navigation approach based on approximate positions","authors":"Ory Chowaw-Liebman, Uta Christoph, Karl-Heinz Krempels, Christoph Terwelp","doi":"10.5220/0003032601950201","DOIUrl":"https://doi.org/10.5220/0003032601950201","url":null,"abstract":"Until now navigation aids have primarily focused on outdoor scenarios, whether driving on highways or, more recently, walking through cities. These systems use the Global Positioning System (GPS) for position information. Indoor navigation however cannot rely on GPS data, as the signals do not penetrate building structure. Thus other techniques are required to provide position information indoors. In this article the approach to an indoor navigation system based on the position information provided by the Device Whispering technique is presented. The position information acquired by Device Whispering is less precise than information acquired by the Fingerprinting technique but more robust. To compensate the deficit of precision the position information is combined with a movement model. This movement model is automatically generated from the maps which are already required for navigation.","PeriodicalId":332730,"journal":{"name":"2010 International Conference on Wireless Information Networks and Systems (WINSYS)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124431739","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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