Tuesday, April 21, 2009
Everything shows that this year will be decisive for selecting technology for 4G wireless systems. Wireless networks of the Fourth Generation should provide mobile data transmission at speeds of 100 Mbps - to fast-moving terminals - and 1 Gbps in the case of relatively fixed positions of the terminals. Currently the development of mobile technologies for 4G goes two ways, WiMAX and LTE.
WiMAX technology is more advanced in terms of implementation. However, it lacks a major marketing success which could persuade manufacturers to start production of new, cheaper devices.
The concept of building all-American 4G networks based on WiMAX - first pushed by Sprint company, then developed as a common project with Clearwire - still faces difficulties. Despite the expenditure of 3 billion dollars, the service has so far been launched only in Baltimore and Portland. The companies announced to include another 10 cities this year. However, there are new disturbing facts - at the end of last year Alcatel-Lucent abandoned development of solutions based on WiMAX technology, in January this year Nokia stopped work on WiMAX devices as well. According to vice-president Anssi Vanjoki from Nokia, LTE technology is more promising.
LTE (Long Term Evolution) is being developed to improve the Universal Mobile Telecommunications System (UMTS). LTE is to increase the performance of the 3G UMTS packet service (based on TCP/IP protocol), with data rates over 100 Mbps. It has been adopted as a 4G standard by AT&T, Telstra, Vodafone, China Telecom, T-Mobile, and Verizon yet.
In January this year, an agreement was signed between Ericsson and TeliaSonera to launch commercial LTE network in Stockholm. In early February 2009, Motorola started the first test 4G network using LTE technology in Swindon, UK.
At CeBIT 2009, the only exhibit concerning LTE technology was... the poster at Alcatel stand. Lack of sufficient funds for investments in new technologies may stop development of both WiMAX and LTE:
Article Source: http://www.articlesbase.com/technology-articles/wimax-are-there-any-prospects-for-success-877701.html