What is a 4G wireless network?
The fourth generation communication system, also known as the 4G wireless network, monitors 3G and 2G as another phase of wireless communication. In fact, two separate types of 4G wireless networks develop and deploy around the world. One, long -term evolution, shortened LTE, was publicly available in December 2009 in Osla in Norway and Stockholm, Sweden. LTE is scheduled for complete deployment in 2012–2015. The second type, worldwide interoperability for access to microwave (Wimax), has been introducing for some time and in April 2010 had more than 148 countries already 568 fixed and mobile networks Wimax and numbers are growing, sometimes daily.
Although LTE is called "4G", debates about whether the term is suitable for him. The technology, as it existed in the first operation, is defined by the 3G (3GPP) partnership project and in accordance with the International Mobile TelecommunicationsAction-2000 (IMT-2000) standards for 3G, rather than IMT-Advanced Standards for 4 generations. CompanyIn 2009, LTE Advanced was presented to the International Telecommunication Union (ITU) according to IMT-Advanced Standard.
Wimax is a 4G wireless network based on two standards. Draw both on the IEEE (Institute of Electrical and Electronics Engineers) and ETSI (European Hiperman Institute). Wimax uses two profiles: 802.16d and 802.16e and since April 2010 it has had the largest number of networks in Europe in Europe, with a relatively large number in Central America and less in the United States. Most networks in service use 3.5 GHz, with others at 2.3 GHz, 2.5 GHz, 3.5 GHz and more than 5 GHz.
from April 20, Wimax has been made available worldwide by a number of suppliers with different networks. Alvarion has most with 55 active networks. ZTE has 28 networks in operation while Motorola, Cisco and Redline Communications have 4G wireless networks in mountainsteens. Many companies have one active network so far. There are currently 23 active Wimax networks in the United States, but Sprint Nextel, which has no active networks yet, announced plans to use Wimax for its 4G wireless network.