Why 2G is faster than 1G

1. Why 2G is faster than 1G?
1G is attached to analogy cell phone .
2G is attached to “Global System For Mobile Communication” which is the general mobile phone in the world.
What’s their different? Communication is the principle function to identified 1G or 2G device .
In past years,1G device could be copied and eavesdropped . Isn’t only this , this communication just the “”no good speak function “”because of the transmit rate in 1G is just 9.6~14.4kbps which reason is too slow to satisfy consumers . Until to 2G device., the function add the web communication , fax and digital transmissions … even road track and navigation ; stock and exchange rate information;short message service .

2. Why cellular is better than broadcast?
Because cellular is the refer to communication systems , especially the Advance Mobile Phone Service (AMPS), that divide a geographic region into sections, called cells. The purpose of this division is to make the most use out of a limited number of transmission frequencies. Each connection, or conversation, requires its own dedicated frequency, and the total number of available frequencies is about 1,000. To support more than 1,000 simultaneous conversations, cellular systems allocate a set number of frequencies for each cell. Two cells can use the same frequency for different conversations so long as the cells are not adjacent to each other.

3. Describe a short history of development of cellular technology from 1G to 3G with a prediction of 4G and beyond.
Mid 1940s-after world War II----United States cellular Planning began
1946-----The first America commercial mobile redio-telephone service issue
1978-----Trial service began
1964----- the Bell System began introducing Improved Mobile Telephone Service or IMTS, a replacement to the badly aging Mobile Telephone System.
1969----- the Bell System employed frequency reuse in a commercial service for the first time.
Over the years, in stages hard to follow, often with 2G and 3G techniques co-existing, TDMA based GSM and AT&T's IS-136 cellular service will be replaced with a wideband CDMA system, IS-136 will first be replaced by GSM before going to UMTS. Technologies will extend the life of these present TDMA systems but eventually new infrastructure and new spectrum will allow CDMA/UMTS development. The present CDMA system, IS-95, which Qualcomm supports and the Sprint PCS network uses, is narrowband CDMA.
4. Read the article that discussed the future of mobile social networks.
Fake has been involved in blogging and online communities since the 1990s. and co-founded photo-sharing site Flickr in 2004 , then sold the site to Yahoo.
Key to its success was the way it let users browse other people’s images, adding comments and forming groups based on shared interests or friends.
Nowaday, you can download its service to cell phone for free and if cell phone has bluetooth it will vibrate when another aka-aki member comes within 20 meters of you . you can then view that person’s profile and if we like what we see ,message them, or perhaps even risk a real-life conversation.
If you’re at a party we can scan for someone with the same interests as you ., or just check out who’s single.Of course , ou can just only detected by your friends or friends of friends.
Another developer came up with command, a social networking application that uses GPS to let you know where your friends are . You could use it to spot that a friend is a couple of blocks away and arrange an impromptu meeting ., It also lets you set up alerts—for example when one of your of friends is within a certain distance of a given location—ideal if your’re trying to avoid that friend you owe $20.
However , no doubts it .. the future of mobile social networks will be more and more advancement .