Pub Date : 2008-09-16DOI: 10.1504/IJIPT.2008.023774
V. Fodor, I. Chatzidrossos
In meshed-based peer-to-peer streaming systems peers forward packets to their neighbors based on local scheduling decisions. The local decisions affect how packets get distributed in the mesh, the probability of duplicates and the distribution of the transmission delays. In this paper we propose an analytic framework that allows the evaluation of various scheduling algorithms. We consider two solutions where scheduling is performed at the forwarding peer, based on the knowledge of the playout buffer content at the neighbors. We evaluate the effectiveness of the solutions in terms of the probability that a peer can play out a packet versus the playback delay, and the scalability of the solutions with respect to the size of the overlay.
{"title":"Playback Delay in Mesh-Based Peer-to-Peer Systems with Random Packet Forwarding","authors":"V. Fodor, I. Chatzidrossos","doi":"10.1504/IJIPT.2008.023774","DOIUrl":"https://doi.org/10.1504/IJIPT.2008.023774","url":null,"abstract":"In meshed-based peer-to-peer streaming systems peers forward packets to their neighbors based on local scheduling decisions. The local decisions affect how packets get distributed in the mesh, the probability of duplicates and the distribution of the transmission delays. In this paper we propose an analytic framework that allows the evaluation of various scheduling algorithms. We consider two solutions where scheduling is performed at the forwarding peer, based on the knowledge of the playout buffer content at the neighbors. We evaluate the effectiveness of the solutions in terms of the probability that a peer can play out a packet versus the playback delay, and the scalability of the solutions with respect to the size of the overlay.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124012706","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}
We describe a cost-effective method which enables location-aware applications in PLMN environments. The proposed approach is assuming no terminal support and it is based on signaling traffic analysis in respect to selected invariant patterns of human behavior, IHAP, and network topology. The experiments carried out in real-life network environment are revealing robust performance, in terms of accuracy and quality of experience (QoE), for certain classes of context aware applications.
{"title":"Significant Location Identification Based on User Behavior Modeling","authors":"O. Brădeanu, D. Munteanu","doi":"10.1109/NGMAST.2008.51","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.51","url":null,"abstract":"We describe a cost-effective method which enables location-aware applications in PLMN environments. The proposed approach is assuming no terminal support and it is based on signaling traffic analysis in respect to selected invariant patterns of human behavior, IHAP, and network topology. The experiments carried out in real-life network environment are revealing robust performance, in terms of accuracy and quality of experience (QoE), for certain classes of context aware applications.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121438144","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. Fasbender, S. Hoferer, Martin Gerdes, Takeshi Matsumura, Andreas Häber, F. Reichert
The horizontally layered architecture of the IMS/NGN standards family enables the delivery of services independent of access network and requesting device. In this article, the authors propose a further separation of service control and delivery, allowing the requesting device – in particular a user's mobile phone – to invite other devices (we will focus on DLNA appliances) into the service delivery, enhancing both user experience and service design flexibility. The proposed solution builds on exploiting proximity technologies (e.g. barcodes, NFC) for pairing the control device with a remote environment. Motivated by scenarios, the architecture concepts are explained and a prototype that was implemented for validation is described. Selected findings and a short overview of related standardization efforts conclude the paper.
{"title":"Phone-Controlled Delivery of NGN Services into Residential Environments","authors":"A. Fasbender, S. Hoferer, Martin Gerdes, Takeshi Matsumura, Andreas Häber, F. Reichert","doi":"10.1109/NGMAST.2008.71","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.71","url":null,"abstract":"The horizontally layered architecture of the IMS/NGN standards family enables the delivery of services independent of access network and requesting device. In this article, the authors propose a further separation of service control and delivery, allowing the requesting device – in particular a user's mobile phone – to invite other devices (we will focus on DLNA appliances) into the service delivery, enhancing both user experience and service design flexibility. The proposed solution builds on exploiting proximity technologies (e.g. barcodes, NFC) for pairing the control device with a remote environment. Motivated by scenarios, the architecture concepts are explained and a prototype that was implemented for validation is described. Selected findings and a short overview of related standardization efforts conclude the paper.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115491813","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}
J. Buford, Xiaotao Wu, R. Bajpai, S. Karthikeyan, V. Krishnaswamy
Location-based services can be used by enterprises to enhance the customer experience and improve workforce operational efficiency. The focus of our work is to provide a scalable architecture for location-based services which integrates into the enterprise communications platform to support new types of converged communications services involving real-time location processing. Unlike prior work in location servers and middleware, we separate application-level processing and raw location event stream processing into two separate components. We show analytically that this leads to performance advantage. By leveraging existing event driven architecture technologies, our approach integrates with the enterprise event bus, is highly scalable, and permits other real-time event streams to be used by location-based applications. We have implemented a prototype to demonstrate the generality and validity of this approach.
{"title":"Enterprise Communications Platform Support for Integrated Location-Based Applications","authors":"J. Buford, Xiaotao Wu, R. Bajpai, S. Karthikeyan, V. Krishnaswamy","doi":"10.1109/NGMAST.2008.86","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.86","url":null,"abstract":"Location-based services can be used by enterprises to enhance the customer experience and improve workforce operational efficiency. The focus of our work is to provide a scalable architecture for location-based services which integrates into the enterprise communications platform to support new types of converged communications services involving real-time location processing. Unlike prior work in location servers and middleware, we separate application-level processing and raw location event stream processing into two separate components. We show analytically that this leads to performance advantage. By leveraging existing event driven architecture technologies, our approach integrates with the enterprise event bus, is highly scalable, and permits other real-time event streams to be used by location-based applications. We have implemented a prototype to demonstrate the generality and validity of this approach.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124984578","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. Oredope, Antonio Liotta, Ivan Roper, Jason Morphett
The session initiation protocol (SIP) is an IETF standardised protocol for multimedia signalling and communication over the internet. SIP has been used in many deployments in client-server architecture. However, this configuration potentially possesses various scalability and redundancy limitations because its architecture relies on various centralised components. To overcome some of these limitations, there has been various proposed architectures for using SIP in a fully decentralised manner with minimal or no centralised authorities. One of these proposed architectures is known as peer-to-peer SIP (P2P-SIP), which uses structured p2p overlay networks to lookup and locate SIP resources over the Internet. In this paper we investigate P2P-SIP in a broader perspective beyond the Internet, focusing on the effects of mobility on this approach especially in highly volatile environments in which the underlying p2p overlay never fully converges or stabilises. Our experimental results shows that P2P-SIP systems using CHORD deployed in these environments are highly scalable. But more interestingly, we also show that as the number of peers in the system increases, the signalling overheads per peer in the overlay tends to decrease.
{"title":"Peer-to-Peer Session Initiation Protocol in Highly Volatile Environments","authors":"A. Oredope, Antonio Liotta, Ivan Roper, Jason Morphett","doi":"10.1109/NGMAST.2008.69","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.69","url":null,"abstract":"The session initiation protocol (SIP) is an IETF standardised protocol for multimedia signalling and communication over the internet. SIP has been used in many deployments in client-server architecture. However, this configuration potentially possesses various scalability and redundancy limitations because its architecture relies on various centralised components. To overcome some of these limitations, there has been various proposed architectures for using SIP in a fully decentralised manner with minimal or no centralised authorities. One of these proposed architectures is known as peer-to-peer SIP (P2P-SIP), which uses structured p2p overlay networks to lookup and locate SIP resources over the Internet. In this paper we investigate P2P-SIP in a broader perspective beyond the Internet, focusing on the effects of mobility on this approach especially in highly volatile environments in which the underlying p2p overlay never fully converges or stabilises. Our experimental results shows that P2P-SIP systems using CHORD deployed in these environments are highly scalable. But more interestingly, we also show that as the number of peers in the system increases, the signalling overheads per peer in the overlay tends to decrease.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130252893","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 access network has remained the bottleneck in efforts to deliver bandwidth intensive new-generation applications and services to subscribers. In the wired access network, GEPON is a promising technology for relieving this bottleneck while GEPON's counterpart in wireless access networks, is WiMAX. A converged quadruplet-services (video, voice, data and mobility) enabled network, which takes full advantage of the strengths and weaknesses of each of these remarkable technologies, no doubt makes an attractive new-generation access network solution. In this paper, therefore, we present an architecture for such a convergence and we elaborate on how control and data packets are formatted, switched and forwarded or transported; how scheduling and bandwidth resource allocation is done; and on how quality of service is provisioned and guaranteed end-to-end in the converged access network architecture.
{"title":"Fixed Mobile Convergence: A Self-Aware QoS Architecture for Converging WiMAX and GEPON Access Networks","authors":"B. O. Obele, Minho Kang","doi":"10.1109/NGMAST.2008.11","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.11","url":null,"abstract":"The access network has remained the bottleneck in efforts to deliver bandwidth intensive new-generation applications and services to subscribers. In the wired access network, GEPON is a promising technology for relieving this bottleneck while GEPON's counterpart in wireless access networks, is WiMAX. A converged quadruplet-services (video, voice, data and mobility) enabled network, which takes full advantage of the strengths and weaknesses of each of these remarkable technologies, no doubt makes an attractive new-generation access network solution. In this paper, therefore, we present an architecture for such a convergence and we elaborate on how control and data packets are formatted, switched and forwarded or transported; how scheduling and bandwidth resource allocation is done; and on how quality of service is provisioned and guaranteed end-to-end in the converged access network architecture.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121105227","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}
After acquiring a new Internet protocol (IP) address due to a vertical handover, IP multimedia subsystem (IMS) subscriber has to send session initiation protocol (SIP) messages for registration and session setup to keep an ongoing session. In this paper, we call this registration and session setup delay 'IMS delay.' We show that the IMS delay is unacceptable for supporting real-time applications in vertical handover from Wireless Fidelity (WiFi) to Universal Mobile Telecommunications System (UMTS). To reduce the IMS delay in case of moving to UMTS from WiFi, we propose an enhanced SIP that makes it possible to apply make-before-break handover scheme under IMS. Using the proposed enhanced SIP, SIP messages are sent via WiFi interface before breaking WiFi connection. We define two new headers in SIP and how these new headers work. Numerical results show that the minimum IMS delay with traditional SIP is 0.609936s whilst the maximum IMS delay with enhanced SIP is 11.666ms.
{"title":"Enhanced SIP for Reducing IMS Delay under WiFi-to-UMTS Handover Scenario","authors":"Hoyeon Lee, B. Moon, A. Aghvami","doi":"10.1109/NGMAST.2008.63","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.63","url":null,"abstract":"After acquiring a new Internet protocol (IP) address due to a vertical handover, IP multimedia subsystem (IMS) subscriber has to send session initiation protocol (SIP) messages for registration and session setup to keep an ongoing session. In this paper, we call this registration and session setup delay 'IMS delay.' We show that the IMS delay is unacceptable for supporting real-time applications in vertical handover from Wireless Fidelity (WiFi) to Universal Mobile Telecommunications System (UMTS). To reduce the IMS delay in case of moving to UMTS from WiFi, we propose an enhanced SIP that makes it possible to apply make-before-break handover scheme under IMS. Using the proposed enhanced SIP, SIP messages are sent via WiFi interface before breaking WiFi connection. We define two new headers in SIP and how these new headers work. Numerical results show that the minimum IMS delay with traditional SIP is 0.609936s whilst the maximum IMS delay with enhanced SIP is 11.666ms.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122011193","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}
This paper presents the framework for a true digital cash based payment system. The significant difference of this system as compared with previous system is that the value token is transferable among the users. This is achieved by using a tamper-resistant hardware to protect the value token. As a consequence of non-existing tamper-proof hardware, various measures are built into the system to detect and isolate fraud.
{"title":"FairCASH: Concepts and Framework","authors":"Y. Ching, H. Kreft","doi":"10.1109/NGMAST.2008.40","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.40","url":null,"abstract":"This paper presents the framework for a true digital cash based payment system. The significant difference of this system as compared with previous system is that the value token is transferable among the users. This is achieved by using a tamper-resistant hardware to protect the value token. As a consequence of non-existing tamper-proof hardware, various measures are built into the system to detect and isolate fraud.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128039479","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}
Benny Fallica, Yue Lu, F. Kuipers, R. Kooij, P. Mieghem
Peer-to-Peer (P2P) file sharing has become immensely popular in the Internet. Recently, there has been a growing interest in academic and commercial environments for live streaming using P2P technology. A number of new P2P digital television (P2PTV) applications have emerged. Such P2PTV applications are developed with proprietary technologies and the quality of experience (QoE) provided by them is not well known. Therefore, investigating their mechanisms, analyzing their performance, and measuring their quality are important for researchers, operators and end users. In this paper, we present results from a measurement study of a P2PTV application called SopCast, using both objective and subjective measurement technologies. The results obtained in our study reveal important design issues of SopCast and the QoE that the end users perceive.
{"title":"On the Quality of Experience of SopCast","authors":"Benny Fallica, Yue Lu, F. Kuipers, R. Kooij, P. Mieghem","doi":"10.1109/NGMAST.2008.13","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.13","url":null,"abstract":"Peer-to-Peer (P2P) file sharing has become immensely popular in the Internet. Recently, there has been a growing interest in academic and commercial environments for live streaming using P2P technology. A number of new P2P digital television (P2PTV) applications have emerged. Such P2PTV applications are developed with proprietary technologies and the quality of experience (QoE) provided by them is not well known. Therefore, investigating their mechanisms, analyzing their performance, and measuring their quality are important for researchers, operators and end users. In this paper, we present results from a measurement study of a P2PTV application called SopCast, using both objective and subjective measurement technologies. The results obtained in our study reveal important design issues of SopCast and the QoE that the end users perceive.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131742922","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}
M. Klafft, D. Knorr, U. Meissen, M. Spatzierer, A. Voisard
Recent improvements in the field of meteorological forecasting now allow for a fine-granular and localized prediction of meteorological parameters, thus opening up new opportunities for situation-based and mobile meteorological services. In this paper, techniques for the fine-granular prediction of local weather conditions are presented, together with an overview of already existing and prospective situation-based meteorological services. Current challenges in service generation are discussed and a platform is proposed that supports flexible and adaptive composition of situation-based meteorological services.
{"title":"SITUMET: Situation-Based Meteorological Services","authors":"M. Klafft, D. Knorr, U. Meissen, M. Spatzierer, A. Voisard","doi":"10.1109/NGMAST.2008.73","DOIUrl":"https://doi.org/10.1109/NGMAST.2008.73","url":null,"abstract":"Recent improvements in the field of meteorological forecasting now allow for a fine-granular and localized prediction of meteorological parameters, thus opening up new opportunities for situation-based and mobile meteorological services. In this paper, techniques for the fine-granular prediction of local weather conditions are presented, together with an overview of already existing and prospective situation-based meteorological services. Current challenges in service generation are discussed and a platform is proposed that supports flexible and adaptive composition of situation-based meteorological services.","PeriodicalId":247507,"journal":{"name":"2008 The Second International Conference on Next Generation Mobile Applications, Services, and Technologies","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133006361","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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