Archive for the ‘Mobile’ Category.
August 22, 2008, 6:13 am
Image source: www.divmedia.net
To the majority of people, satellite Internet service offers the answer. Satellite Internet access enables most everyone, anywhere to have the ability to surf the Internet with lightning-fast speed. There are two types of satellite Internet access, “one way” and “two way” systems.
Two way satellite systems send and receive information from your satellite dish over the Internet and deliver it directly to your computer. The biggest benefit of a two way setup is that you’re able to receive high speed Internet access without tying up your phone line. Two way satellite Internet service also gives you an always on system. Browsing and download speeds can be as high as 1.5mpbs with upload speed about 128kbps.
If you are going to be uploading lots of information then two way satellite Internet service may be best for you. Conversely, for the average to moderate Internet browser, one way satellite Internet service offers high speed that is reliable and much less expensive than two way access. Because of the ease and dependability, one way satellite Internet systems are not regulated by the FCC. This gives you the ability to make a choice of professional or self installation.
February 8, 2008, 1:39 pm
High-Speed Packet Access (HSPA) is a collection of mobile telephony protocols that extend and improve the performance of existing UMTS protocols. Two standards, HSDPA and HSUPA, have been established and a further standard, HSOPA, is being proposed.
The two existing standards (HSDPA and HSUPA) in the family provide increased performance by using improved modulation schemes and by refining the protocols by which handsets and base stations communicate. These improvements lead to a better utilization of the existing radio bandwidth provided by UMTS.
The number of commercial 3.5G networks–also known as High-Speed Downlink Packet Access, or HSDPA, networks–launched worldwide grew by 69 percent in 2007. There are now 174 commercial HSDPA networks in 76 countries. An additional 38 networks are committed to rollouts, which will bump the total to 211 HSDPA networks in 90 countries. Commercial HSDPA networks are widely available in Western Europe (61 networks), Southeast Asia (35), Eastern Europe (34), the Middle East and Africa (20), and the Americas and the Caribbean (16). Almost two-thirds (62 percent) of existing commercial HSDPA networks support downlink speeds of 3.6Mbps or more, while more than a fifth (21 percent) support the peak downlink speed of 7.2Mbps.
Many HSPA rollouts can be achieved by a software upgrade to existing 3G networks, giving 3.5G a headstart over WiMax, which requires dedicated network infrastructure. Rising sales of HSPA-enabled mobiles–aided by more-generous-than-expected operator subsidies of the hardware–are helping to drive the 3.5G market.
via [Wikipedia]