نتایج جستجو برای: mobile communications
تعداد نتایج: 242139 فیلتر نتایج به سال:
W-CDMA protocol test capability 3GPP Standard compliant development tool Runs conformance tests in TS34.123 Libraries available for UE development, integration and interoperability testing Graphical user interfaces for test generation and protocol analysis Supports dual mode FDD/GSM testing Re-use of test cases on VST and PTS W-CDMA protocol test capability 3GPP Standard compliant development t...
Cognitive radio is an emerging technology that enables the flexible development, construction, production, shipping, and deployment of highly adaptive radios that are built upon software defined radio technology. This contribution starts with a brief section that underlines the paramount importance of the mobile radio communications channel. Then, spectrum issues are discussed to emphasize the ...
Rapid advances in Hardware and wireless communication technology have made the concept of mobile computing a reality. There is also an increasing need to preserve the confidentiality, data integrity and authenticity of data in order to have more security. In this paper, the security of the WAP WTLS (Wireless Application Protocol, Wireless Transport Layer Security) is analyzed and modification t...
1.1 Good sources for subscriber numbers and other statistics are, e.g., www.gsmworld.com, www.3gpp.org, www.3gpp2.org, www.emc-database.com, www.3g.co.uk, www.regtp.de ... 1.2 Today’s GSM operators add the new 3G air interfaces of UMTS to their existing GSM/GPRS infrastructure networks. Current GSM/GPRS networks already offer packet and circuit switched data transmission following the Release 9...
The papers in this special issue represent the seven best papers from the 6th IEEE International Workshop on Mobile Multimedia Communications (MOMUC'99), which was held in San Diego, November 15–17, 1999. The scope of MO-MUC'99 includes broadband wireless networking for data and multimedia, mobile multimedia systems and applications together with associated mobile computing devices, video proce...
developing of mobile technologies in the field of health create a new branch of e-health called mobile-health. the goal of this study is evaluation of communications infrastructure for mobile-health. for this purpose, fuzzy analytic hierarchy process is used for modeling and ranking the criterions and applications. three main criteria in mobile communication network namely, data transmission, a...
Global System for Mobile communications (GSM) is a popular mobile communications network. Short Message Service (SMS) is an easily adopted person-to-person communications technology for mobile devices. The GSM architecture allows for the insertion of mass application-generated SMS messages directly into the network infrastructure. This is achieved through a SMS Mobile Switching Centre (SMSC) us...
the effects of mobile phone exposure on humans, due to its potential health hazards, have become the focus of interest since many years ago. the effect of global system for mobile communications (gsm 900 mhz) on growth and proliferation rate of mesenchymal stem cells was assessed at the different distances and intensities of radiation. a subscriber identity module (sim) card was inserted to thi...
The wireless industry is rapidly transitioning from proprietary architecture to more flexible, cost effective open wireless architecture (OWA) systems. This transition is creating interesting challenges for developers, manufacturers, integrators, operators and end-users as they wrestle with complexities of open wireless systems. Fourth Generation (4G) Mobile Communications should not focus only...
This tutorial paper describes the current development in the use of low earth orbiting satellites (LEOS) for global personal communications. The basic architectures and rationales for design choices are discussed. Representative TDMA and CDMA systems are outlined and a summary of the diierences between LEOS communications and terrestrial cellular is presented along with the prospects for CDMA b...
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