Results 121 to 130 of about 254,009 (145)

Security in 4G

2018
IMS is a standardized service architecture defined by 3GPP, ETSI, and IETF to provide multimedia services such as videoconferencing, VoD, and voice over IP. IMS is mainly based on the SIP protocol for session initialization. The convergence to full IP has advantages but also disadvantages.
Elmostafa Belmekki, Raouyane Brahim, Abdelhamid Belmekki, Mostafa Bellafkih   +3 more
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M2M Challenges and Opportunities in 4G

Wireless Personal Communications, 2015
4G technology includes a profile for M2M communications in order to improve the efficiency of the foreseeable connection of hundreds of devices to the broadband wireless networks. These devices impose different requirements to those of human communications, most significantly their bursty nature and the small payload usually associated with each ...
Javier Poncela, José Miguel Moreno-Roldán, Muhammad Aamir 0001, Bilal Ahmad Alvi   +3 more
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Hyperbolic Lattices with Complete Labeling Derived from {4g, 4g} Tessellations

2015
Hyperbolic lattices \(\mathcal{O}\) are the basic entities used in the design of signal constellations in the hyperbolic plane. Once the identification of the arithmetic Fuchsian group in a quaternion order is made, the next step is to present the codewords of a code over a graph, or a signal constellation (quotient of an order by a proper ideal ...
Cátia Regina de Oliveira Quilles Queiroz, Cintya Benedito, José Carmelo Interlando, Reginaldo Palazzo Júnior   +3 more
openaire   +1 more source

4G in the U.S.A.

IEEE Spectrum, 2010
Fourth-generation wireless got its official start in the United States one year ago when Clearwire Wireless made Portland, Ore., the first city to be covered by its WiMax wireless "last mile" broadband connection. Twelve months later, the shape of wireless's future is now clearly outlined: WiMax has the early lead but will eventually be overtaken by ...
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4G Safety

Traffic Technology International, 2018
Your essential guide to the future of transportation communications
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Δίκτυα 4G τεχνοοικονομική ανάλυση 4G

2013
Στην παρούσα διπλωματική εργασία παρουσιάζονται τα δίκτυα 4ης γενιάς (4G). Η τέταρτη γενιά (4G) είναι η επόμενη γενιά των ασύρματων δικτύων που θα αντικαταστήσει τα δίκτυα τρίτης γενιάς (3G) και θα προσφέρει στους χρήστες όλα όσα δεν κατάφεραν να δώσουν τα προηγούμενα δίκτυα.
openaire   +1 more source

To 4G mobile communication and beyond

2013 International Symposium on VLSI Technology, Systems and Application (VLSI-TSA), 2013
In summary, we envision that the future mobile communication network will be an Ultra Dense, Diverse Access Technologies Converged, Intelligent Network infrastructure complemented by a Device-to-Device network. An ultra-dense radio network with cells of many different sizes is the most effective way of increasing system capacity and ubiquitously covers
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Antenna design challenges for 4G

IEEE Wireless Communications, 2011
The trend in mobile wireless devices has been to provide faster access, improved processors, more memory, brighter and higher resolution screens, additional connectivity with Wi-Fi, GPS, third generation (3G), and fourth generation (4G) world access - all with longer battery life in thinner, sleeker packages.
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The evolution to 4G systems

Bell Labs Technical Journal, 2009
Jean-Paul Rissen, Robert Soni
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2017
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