نتایج جستجو برای: ip phone

تعداد نتایج: 125377  

2013
P. K. Gaikwad

The research work presented in this paper shows the development of a system capable of sending the real-time heart rate of a patient under observation on a cellular phone in the form of Short Message Services (SMS). The system makes it possible to keep in touch with a physician; especially, when the patient’s heart functioning shows some kind of diseases like arrhythmia. By observing any of the...

2010
Mathias Kretschmer Peter Hasse Christian Niephaus Thorsten Horstmann Karl Jonas

Meshed wireless back-haul networks are seen as an affordable technology to bring Internet connectivity into rural and previously unconnected regions. To date, the main focus is to provide access to classical services such as the WWW or email. Access to such services requires the users to use a personal computer or a recent smart phone. Especially in developing regions, the prevailing end user d...

2005
Albert Cabellos-Aparicio René Serral-Gracià Loránd Jakab Jordi Domingo-Pascual

This paper studies the problems related to mobile connectivity on a wireless environment with Mobile IPv6, specially the handover, which is the most critical part. The main goal of this paper is to develop a structured methodology for analyzing 802.11/IPv6/MIPv6 handovers and their impact on application’s level. This is accomplished by capturing traffic on a testbed and analyzing it with two ap...

2004
Geunhyung Kim Cheeha Kim

In IP-based wireless/mobile networks, minimizing handover latency is one of the most important issues. Fast handover mobile IPv6 (FMIPv6) reduces the handover latency by handover prediction with link-layer information. It requires additional overhead in terms of signaling and may waste resources by incorrect prediction. In this paper, we introduce a new non-predictive handover scheme which empl...

2012
J. García-Hernández J. C. Velázquez- Hernández C. F. García-Hernández M. A. Vallejo-Alarcón

IP telephony, also called voice over Internet protocol (VoIP), is rapidly becoming a familiar term and technology that is implementing in the enterprise, education, government organizations and industry. Mobile IP telephony is the new generation of communications networks that makes possible the convergence of voice and data over wireless local area networks (WLANs). This technology combines da...

Journal: :IEEE Computer 2004
Neal Leavitt

I nternet telephony, also known as voice over IP, may finally be ready for prime time in 2004. An increasing number of IP telephony providers , traditional phone carriers, and now cable companies—includingage—are offering a growing range of corporate and residential services nationwide. Internet telephony is attractive to customers because it uses lower-cost equipment and is less expensive to o...

2006
BING-FEI WU

In the decade, the video phones have brought the intense interests for its service. However, the limited network bandwidth, the unfriendly operations like IP dialing, and the dynamic host configuration protocol, DHCP, environment bound the development. An innovative video phone system, IVPS, based on a creative data transmission architecture has been presented in the paper, especially the advan...

2001
Wolfgang Schoenfeld Andreas Meissner Holger Kirchner

Mobility of a phone within a cellular network or of a computer within the Internet has to be managed by the respective network infrastructure: Routes to and from a mobile device have to be changed. In order to base mobility management of future cellular networks on IP, the Internet Protocol, various proposals like Mobile IP are currently being discussed. In this paper, we develop a simple model...

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