In this paper a high throughput, low latency, mobility adaptive and energy efficient medium access protocol (MAC) called Mobility Adaptive (MA) for wireless sensor networks. MAMAC ensures that transmissions incur no collisions, and allows nodes to undergo sleep mode whenever they are not transmitting or receiving. It uses delay allocation scheme based on traffic priority at each node and avoids allocating same back off delay for more than one node unless they are in separate clusters. It also allows nodes to determine when they can switch to sleep mode during operation. MA-MAC for mobile nodes provides fast association between the mobile node and the cluster coordinator. The proposed MAC performs well in both static and mobile scenarios, which shows its significance over existing MAC protocols proposed for mobile applications. The performance of MA-MAC is evaluated through extensive simulation, analysis and comparison with other mobility aware MAC protocols. The results show that MA-MAC outperforms significantly the existing CSMA/CA, Sensor Mac (S-MAC), Mobile MAC (MOBMAC), Mobility aware Delay sensitive MAC (MD-MAC) and Dynamic Sensor MAC (DS-MAC) protocols including throughput, latency and energy consumption.
{"title":"Mobility Adaptive Energy Efficient and Low Latency MAC for Wireless Sensor Networks","authors":"B. Khan, R. Bilal","doi":"10.4018/jhcr.2013040103","DOIUrl":"https://doi.org/10.4018/jhcr.2013040103","url":null,"abstract":"In this paper a high throughput, low latency, mobility adaptive and energy efficient medium access protocol (MAC) called Mobility Adaptive (MA) for wireless sensor networks. MAMAC ensures that transmissions incur no collisions, and allows nodes to undergo sleep mode whenever they are not transmitting or receiving. It uses delay allocation scheme based on traffic priority at each node and avoids allocating same back off delay for more than one node unless they are in separate clusters. It also allows nodes to determine when they can switch to sleep mode during operation. MA-MAC for mobile nodes provides fast association between the mobile node and the cluster coordinator. The proposed MAC performs well in both static and mobile scenarios, which shows its significance over existing MAC protocols proposed for mobile applications. The performance of MA-MAC is evaluated through extensive simulation, analysis and comparison with other mobility aware MAC protocols. The results show that MA-MAC outperforms significantly the existing CSMA/CA, Sensor Mac (S-MAC), Mobile MAC (MOBMAC), Mobility aware Delay sensitive MAC (MD-MAC) and Dynamic Sensor MAC (DS-MAC) protocols including throughput, latency and energy consumption.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129876195","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}
A large number of attractive services, which combine the functionality of mobile terminals with existing services on the Internet, are spreading. The service delivery platform (SDP) can provide more attractive services by collaborating with telecommunication carrier services. SDP-based services are provided through collaboration among reusable service components, referred to as "enablers". As the number of such collaborative services increases, the peak load on the collaboration process and particular enablers will increase and the load will fluctuate widely. Although these increase the number of servers constituting the SDP for providing stable collaborative services at peak loads, a large amount of server resources could be wasted under conditions other than peak load times. In order to continue to provide stable collaborative services without wasting server resources, it is desirable to improve the efficiency of server resources with the result that the number of running servers can be increased or decreased without shutting services down depending on the load. To realize this, we propose an enhanced SDP architecture that features a distributed enabler-collaboration and enabler-relocation mechanism. We implement the proposal on real PC-servers, and evaluate the proposed architecture to verify its effectiveness.
{"title":"Enhanced Service Delivery Platform for Efficient Use of Server Resources","authors":"Manabu Ito, S. Komorita, Y. Kitatsuji, H. Yokota","doi":"10.1109/NGMAST.2011.16","DOIUrl":"https://doi.org/10.1109/NGMAST.2011.16","url":null,"abstract":"A large number of attractive services, which combine the functionality of mobile terminals with existing services on the Internet, are spreading. The service delivery platform (SDP) can provide more attractive services by collaborating with telecommunication carrier services. SDP-based services are provided through collaboration among reusable service components, referred to as \"enablers\". As the number of such collaborative services increases, the peak load on the collaboration process and particular enablers will increase and the load will fluctuate widely. Although these increase the number of servers constituting the SDP for providing stable collaborative services at peak loads, a large amount of server resources could be wasted under conditions other than peak load times. In order to continue to provide stable collaborative services without wasting server resources, it is desirable to improve the efficiency of server resources with the result that the number of running servers can be increased or decreased without shutting services down depending on the load. To realize this, we propose an enhanced SDP architecture that features a distributed enabler-collaboration and enabler-relocation mechanism. We implement the proposal on real PC-servers, and evaluate the proposed architecture to verify its effectiveness.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130714926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Mikóczy, S. Schumann, P. Podhradský, Tim Koski, Marko Heinikangas
This paper presents a novel concept and prototype implementation of hybrid IPTV service based on IMS and DVB-H technologies. In the hybrid service, both traditional broadcast and unicast transmission technologies are used to deliver IPTV content. It is argued how such service scenario is effective and beneficial for hybrid use cases. The original technical contributions to ETSI technical report TR 182 030 about IMS-IPTV interconnection with DVB-H technology are presented in paper as well as description of our prototype implementation done within Celtic Netlab project.
{"title":"Hybrid IPTV Services with IMS: Integration of IMS Based IPTV with Broadcast and Unicast Mobile TV Services Using DVB-H","authors":"E. Mikóczy, S. Schumann, P. Podhradský, Tim Koski, Marko Heinikangas","doi":"10.1109/NGMAST.2011.23","DOIUrl":"https://doi.org/10.1109/NGMAST.2011.23","url":null,"abstract":"This paper presents a novel concept and prototype implementation of hybrid IPTV service based on IMS and DVB-H technologies. In the hybrid service, both traditional broadcast and unicast transmission technologies are used to deliver IPTV content. It is argued how such service scenario is effective and beneficial for hybrid use cases. The original technical contributions to ETSI technical report TR 182 030 about IMS-IPTV interconnection with DVB-H technology are presented in paper as well as description of our prototype implementation done within Celtic Netlab project.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129300909","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}
Consideration of the availability of learning resources, or the ability of mobile learners to find information, is not enough when defining mobile and ubiquitous learning approaches. This limited consideration could play a role in blending both learning approaches as they assist the mobile learners. Moreover, the essential requirements for mobile learners may be overlooked by this consideration and consequently, mobile learners may be affected negatively. In this paper, mobile and ubiquitous learning are compared from the view of the nature of interaction between learners and computers. This comparison will provide a close picture of the potential of these learning approaches and the differences between their environments. Furthermore, it plays a crucial role in achieving a level where the different design requirements to facilitate the learning for learners in m-learning and u-learning environments are realised and understood.
{"title":"HCI as a Differentiator between Mobile and Ubiquitous Learning","authors":"Naif R. Aljohani, H. Davis, T. Tiropanis","doi":"10.1109/NGMAST.2011.24","DOIUrl":"https://doi.org/10.1109/NGMAST.2011.24","url":null,"abstract":"Consideration of the availability of learning resources, or the ability of mobile learners to find information, is not enough when defining mobile and ubiquitous learning approaches. This limited consideration could play a role in blending both learning approaches as they assist the mobile learners. Moreover, the essential requirements for mobile learners may be overlooked by this consideration and consequently, mobile learners may be affected negatively. In this paper, mobile and ubiquitous learning are compared from the view of the nature of interaction between learners and computers. This comparison will provide a close picture of the potential of these learning approaches and the differences between their environments. Furthermore, it plays a crucial role in achieving a level where the different design requirements to facilitate the learning for learners in m-learning and u-learning environments are realised and understood.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125745544","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 : 2011-09-14DOI: 10.4018/jitwe.2011100104
M. Wódczak
The current trends in research and industry aim to develop new networking paradigms that would be able to bring ubiquitous on-demand services. This may be achievable thanks to the fact that the end user mobile devices are envisaged to support cutting edge technologies such as cooperative transmission. However, a real advancement will only be attainable when the grounds for cooperative mobile networking have been accurately established. In fact, looking at the concept of the relay enhanced cell, one can come across some commonalities with mobile ad-hoc networks. This especially holds true for local area scenarios where the base station might be usually perceived as an access point while the fixed and/or movable relay nodes might be replaced by movable and/or mobile end user devices. Moreover, such a cooperative mobile network needs to accommodate the fact that the end user devices can expose certain dose of autonomy allowing them to auto-discover and choose to play certain roles. Last but not least, the network needs to be driven by a management overlay platform interacting or being a part of an operations support system deployed by the network operator.
{"title":"Convergence Aspects of Autonomic Cooperative Networking","authors":"M. Wódczak","doi":"10.4018/jitwe.2011100104","DOIUrl":"https://doi.org/10.4018/jitwe.2011100104","url":null,"abstract":"The current trends in research and industry aim to develop new networking paradigms that would be able to bring ubiquitous on-demand services. This may be achievable thanks to the fact that the end user mobile devices are envisaged to support cutting edge technologies such as cooperative transmission. However, a real advancement will only be attainable when the grounds for cooperative mobile networking have been accurately established. In fact, looking at the concept of the relay enhanced cell, one can come across some commonalities with mobile ad-hoc networks. This especially holds true for local area scenarios where the base station might be usually perceived as an access point while the fixed and/or movable relay nodes might be replaced by movable and/or mobile end user devices. Moreover, such a cooperative mobile network needs to accommodate the fact that the end user devices can expose certain dose of autonomy allowing them to auto-discover and choose to play certain roles. Last but not least, the network needs to be driven by a management overlay platform interacting or being a part of an operations support system deployed by the network operator.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133707892","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}
The implementation of cooperative diversity with relays has advantages over point-to-point multiple-input multipleoutput (MIMO) systems in particular overcoming correlated paths due to small inter-element spacing. A simple transmitter with one antenna may moreover exploit cooperative diversity or space time coding gain through distributed relays. In this paper, similar distributed transmission is considered with the golden code, and we propose a new strategy for relay selection, called the maximum-mean selection policy, for distributed transmission based on a wireless relay network. This new strategy performs a channel strength tradeoff at every relay node to select the best two relays for transmission. It improves upon the established onesided selection strategy of maximum-minimum policy. Simulation results comparing the bit error rate (BER) of a scheme without relay selection, with the maximum-minimum and maximummean selection schemes confirm the performance advantage of relay selection and that our proposed strategy yields the best performance of the three methods.
{"title":"Relay Selection in Distributed Transmission Based on the Golden Code in Wireless Networks","authors":"L. Ge, Gaojie Chen, J. Chambers","doi":"10.1109/NGMAST.2011.43","DOIUrl":"https://doi.org/10.1109/NGMAST.2011.43","url":null,"abstract":"The implementation of cooperative diversity with relays has advantages over point-to-point multiple-input multipleoutput (MIMO) systems in particular overcoming correlated paths due to small inter-element spacing. A simple transmitter with one antenna may moreover exploit cooperative diversity or space time coding gain through distributed relays. In this paper, similar distributed transmission is considered with the golden code, and we propose a new strategy for relay selection, called the maximum-mean selection policy, for distributed transmission based on a wireless relay network. This new strategy performs a channel strength tradeoff at every relay node to select the best two relays for transmission. It improves upon the established onesided selection strategy of maximum-minimum policy. Simulation results comparing the bit error rate (BER) of a scheme without relay selection, with the maximum-minimum and maximummean selection schemes confirm the performance advantage of relay selection and that our proposed strategy yields the best performance of the three methods.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116568839","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}
Masayuki Shinohara, A. Hattori, S. Ioroi, Hiroshi Tanaka, H. Hayami, Hidekazu Fujioka, Yuichi Harada
This paper presents a hazard/crime incident information sharing system using cell phones. Cell phone penetration is nearly 100% among adults in Japan and cell phones have functions which are sufficient as a telecommunication tool besides GPS positioning and camera functions. The open source software, Apache, Postfix and MySQL is installed on a system server, and, together with the information service provided by Google Maps, are used to satisfy system requirements that are determined for the local community. Conventional systems deliver information to all people registered in the same block, even if an incident occurred at a spot far from their house. The key feature of the proposed system is that the distribution range of e-mail messages which give hazard and location information etc. is determined by the geometrical distance from the incident spot to the residence of each registered member. The functions and operations have been confirmed by a trial conducted in cooperation with the members of the neighborhood community.
{"title":"Design and Trial of a Cell-phone-based Hazard Information Sharing System for Residents Living Close to an Incident","authors":"Masayuki Shinohara, A. Hattori, S. Ioroi, Hiroshi Tanaka, H. Hayami, Hidekazu Fujioka, Yuichi Harada","doi":"10.1109/NGMAST.2011.13","DOIUrl":"https://doi.org/10.1109/NGMAST.2011.13","url":null,"abstract":"This paper presents a hazard/crime incident information sharing system using cell phones. Cell phone penetration is nearly 100% among adults in Japan and cell phones have functions which are sufficient as a telecommunication tool besides GPS positioning and camera functions. The open source software, Apache, Postfix and MySQL is installed on a system server, and, together with the information service provided by Google Maps, are used to satisfy system requirements that are determined for the local community. Conventional systems deliver information to all people registered in the same block, even if an incident occurred at a spot far from their house. The key feature of the proposed system is that the distribution range of e-mail messages which give hazard and location information etc. is determined by the geometrical distance from the incident spot to the residence of each registered member. The functions and operations have been confirmed by a trial conducted in cooperation with the members of the neighborhood community.","PeriodicalId":142071,"journal":{"name":"2011 Fifth International Conference on Next Generation Mobile Applications, Services and Technologies","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128396917","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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