Topic
Roaming
About: Roaming is a research topic. Over the lifetime, 8308 publications have been published within this topic receiving 115901 citations.
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01 Sep 2003
TL;DR: The Diameter base protocol is intended to provide an Authentication, Authorization and Accounting framework for applications such as network access or IP mobility, and needs to be supported by all Diameter implementations.
Abstract: The Diameter base protocol is intended to provide an Authentication, Authorization and Accounting (AAA) framework for applications such as network access or IP mobility. Diameter is also intended to work in both local Authentication, Authorization & Accounting and roaming situations. This document specifies the message format, transport, error reporting, accounting and security services to be used by all Diameter applications. The Diameter base application needs to be supported by all Diameter implementations.
1,087 citations
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27 May 2005
TL;DR: In this article, a Mobility Management Server coupled to the mobile network maintains the state of any number of mobile end systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes.
Abstract: A seamless solution transparently addresses the characteristics of nomadic systems, and enables existing network applications to run reliably in mobile environments. The solution extends the enterprise network, letting network managers provide mobile users with easy access to the same applications as stationary users without sacrificing reliability or centralized management. The solution combines advantages of existing wire-line network standards with emerging mobile standards to create a solution that works with existing network applications. A Mobility Management Server coupled to the mobile network maintains the state of each of any number of Mobile End Systems and handles the complex session management required to maintain persistent connections to the network and to other peer processes. If a Mobile End System becomes unreachable, suspends, or changes network address (e.g., due to roaming from one network interconnect to another), the Mobility Management Server maintains the connection to the associated peer task—allowing the Mobile End System to maintain a continuous connection even though it may temporarily lose contact with its network medium. In one example, Mobility Management Server communicates with Mobile End Systems using Remote Procedure Call and Internet Mobility Protocols.
1,040 citations
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01 Jan 2004
TL;DR: Ling et al. as mentioned in this paper examined the once unexpected interaction between humans and cell phones, and between humans, period, based on world-wide research involving tens of thousands of interviews and contextual observations, looked into the impact of the phone on our daily lives.
Abstract: Has the cell phone forever changed the way people communicate? The mobile phone is used for “real time” coordination while on the run, adolescents use it to manage their freedom, and teens “text” to each other day and night. The mobile phone is more than a simple technical innovation or social fad, more than just an intrusion on polite society. This book, based on world-wide research involving tens of thousands of interviews and contextual observations, looks into the impact of the phone on our daily lives. The mobile phone has fundamentally affected our accessibility, safety and security, coordination of social and business activities, and use of public places.
Based on research conducted in dozens of countries, this insightful and entertaining book examines the once unexpected interaction between humans and cell phones, and between humans, period. The compelling discussion and projections about the future of the telephone should give designers everywhere a more informed practice and process, and provide researchers with new ideas to last years.
*Rich Ling (an American working in Norway) is a prominent researcher, interviewed in the new technology article in the November 9 issue of the New York Times Magazine.
*A particularly "good read", this book will be important to the designers, information designers, social psychologists, and others who will have an impact on the development of the new third generation of mobile telephones.
*Carefully and wittily written by a senior research scientist at Telenor, Norway's largest telecommunications company, and developer of the first mobile telephone system that allowed for international roaming.
Table of Contents
Preface
Acknowledgments
Chapter 1: Introduction
Chapter 2: Making Sense of Mobile Telephone Adoption Chapter 3: Safety and Security
Chapter 4: The Coordination of Everyday Life
Chapter 5: The Mobile Telephone and Teens
Chapter 6: The Intrusive Nature of Mobile Telephony
Chapter 7: Texting and the Growth of Asynchronous Discourse
Chapter 8: Conclusion: The Significance of Osborne's Prognosis
Appendix
Endnotes
Bibliography
Index
898 citations
01 Oct 2011
TL;DR: The design and experimental evaluation of ArrayTrack is presented, an indoor location system that uses MIMO-based techniques to track wireless clients at a very fine granularity in real time, as they roam about a building, making for the first time ubiquitous real-time, fine-grained location available on the mobile handset.
Abstract: With myriad augmented reality, social networking, and retail shopping applications all on the horizon for the mobile handheld, a fast and accurate location technology will become key to a rich user experience. When roaming outdoors, users can usually count on a clear GPS signal for accurate location, but indoors, GPS often fades, and so up until recently, mobiles have had to rely mainly on rather coarse-grained signal strength readings. What has changed this status quo is the recent trend of dramatically increasing numbers of antennas at the indoor access point, mainly to bolster capacity and coverage with multiple-input, multiple-output (MIMO) techniques. We thus observe an opportunity to revisit the important problem of localization with a fresh perspective. This paper presents the design and experimental evaluation of ArrayTrack, an indoor location system that uses MIMO-based techniques to track wireless clients at a very fine granularity in real time, as they roam about a building. With a combination of FPGA and general purpose computing, we have built a prototype of the ArrayTrack system. Our results show that the techniques we propose can pinpoint 41 clients spread out over an indoor office environment to within 23 centimeters median accuracy, with the system incurring just 100 milliseconds latency, making for the first time ubiquitous real-time, fine-grained location available on the mobile handset.
703 citations
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02 Apr 2013TL;DR: In this paper, the authors present an indoor location system that uses MIMO-based techniques to track wireless clients at a very fine granularity in real time, as they roam about a building.
Abstract: With myriad augmented reality, social networking, and retail shopping applications all on the horizon for the mobile handheld, a fast and accurate location technology will become key to a rich user experience. When roaming outdoors, users can usually count on a clear GPS signal for accurate location, but indoors, GPS often fades, and so up until recently, mobiles have had to rely mainly on rather coarse-grained signal strength readings. What has changed this status quo is the recent trend of dramatically increasing numbers of antennas at the indoor access point, mainly to bolster capacity and coverage with multiple-input, multiple-output (MIMO) techniques. We thus observe an opportunity to revisit the important problem of localization with a fresh perspective. This paper presents the design and experimental evaluation of ArrayTrack, an indoor location system that uses MIMO-based techniques to track wireless clients at a very fine granularity in real time, as they roam about a building. With a combination of FPGA and general purpose computing, we have built a prototype of the ArrayTrack system. Our results show that the techniques we propose can pinpoint 41 clients spread out over an indoor office environment to within 23 centimeters median accuracy, with the system incurring just 100 milliseconds latency, making for the first time ubiquitous real-time, fine-grained location available on the mobile handset.
654 citations