Showing posts with label Technology. Show all posts
Showing posts with label Technology. Show all posts

4G Wireless Network Technology

Labels: Posted by Kranthi Kiran on Monday, December 13, 2010 at 4:29 PM

The name 4G is for further advance invention in wireless networks likely mobile phones to the up coming generation. One contributor in several parts of United States of America only offered it in 2009. Un till now no company contracted to represent 4G mobiles technology, currently it is just only a market term.
The alphabet “G” in term 4G means generation, in wireless networks like cellular phones using “G” technology from last 20 to 30 years. The technology o 1G occupied the first commonly existing cellular phones, the launched of 2G technology in begin of year 1990 brought a digital format of text messaging. After introduced of 3G technology which also brought a great option to carry data or improved info-services of how to carry websites in the original form. Now day’s iPhone is the latest and well-recognized exemplar of 3G mobile technology.
Un till now 4G mobiles is not set up as a contract. Therefore the appearance of 4G merely a market term and somewhat necessities. There should be safe and secure connection of 4G because if it’s high rate data transfer speed. An additional objective is to provide good network coverage because some time it causes trouble when it is use between several network-covered areas. An IP address based network programs should use in 4G mobile technologies for using Internet services.
The two foremost system Wimax and Clearwire, are using 4G mobile technologies within the boundaries of United States of America, a organization where major part of proprietor is Sprint Nextel. In 2008 at Baltimore it was the start of testing services further they planned to spread it out in markets in 2009. So they set up a plan to provide coverage up to 80 cities till end of 2010.
Generally Verizon backs the competitor methods, durable Evolution or LTE. It was probably anticipated that they make it prepared for testing in 2010 but due to the LTE sponsor prevail over some inconvenience by providing higher speed and manufacturing contemptible equipments, it will launch for common usage in 2012.
The Fourth Generation mobile technologies will be commonly used in cellular phones and also in computers for using Internet services. In areas having good network coverage can also avail the services of connection of home broadband without installing any cables and wires. The 4G wireless connections can be easily carried to everywhere for using Internet services and can it use when you are hanging out with friends, airports, subways, and coffee café.

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What is 3G???

Labels: Posted by Kranthi Kiran on Sunday, December 12, 2010 at 9:39 AM

Definition of 3G:
3G is the third generation of wireless technologies. It comes with enhancements over previous wireless technologies, like high-speed transmission, advanced multimedia access and global roaming. 3G is mostly used with mobile phones and handsets as a means to connect the phone to the Internet or other IP networks in order to make voice and video calls, to download and upload data and to surf the net.
How is 3G Better?:
3G has the following enhancements over 2.5G and previous networks:
  • Several times higher data speed;
  • Enhanced audio and video streaming;
  • Video-conferencing support;
  • Web and WAP browsing at higher speeds;
  • IPTV (TV through the Internet) support.
3G Technical Specifications:
The transfer rate for 3G networks is between 128 and 144 kbps (kilobits per second) for devices that are moving fast and 384 kbps for slow ones(like for pedestrians). For fixed wireless LANs, the speed goes beyond 2 Mbps. 3G is a set of technologies and standards that include W-CDMA, WLAN and cellular radio, among others.
3G follows a pattern of G's that started in the early 1990's by the ITU. The pattern is actually a wireless initiative called the IMT-2000 (International Mobile Communications 2000). 3G therefore comes just after 2G and 2.5G, the second generation technologies. 2G technologies include, among others, the Global System for Mobile (GSM) - the famous mobile phone technology we use today. 2.5G brings standards that are midway between 2G and 3G, including the General Packet Radio Service (GPRS), Enhanced Data rates for GSM Evolution (EDGE), Universal Mobile Telecommunications System (UMTS) etc.
What is Required for Using 3G?:
The first thing you require is a device (e.g. a mobile phone) that is 3G compatible. This is where the name 3G phone comes from - a phone that has 3G functionality; nothing to do with the number of cameras or the memory it has. An example is the iPhone 3G. 3G phones commonly have two cameras since the technology allows the user to have video calls, for which a user-facing camera is required for capturing him/her.
Unlike with Wi-Fi which you can get for free in hotspots, you need to be subscribed to a service provider to get 3G network connectivity. We often call this kind of service a data plan or network plan.
Your device is connected to the 3G network through its SIM card (in the case of a mobile phone) or its 3G data card (which can be of different types: USB, PCMCIA etc.), which are both generally provided/sold by the service provider. Through that, you get connected to the Internet whenever you are within a 3G network. Even if you are not in one, you can still use 2G or 2.5G services provided by the service provider.
What Does 3G Cost?:
3G is not very cheap, but it is worthwhile for users that need connectivity on the move. Some providers offer it within a somewhat costly package, but most of them have plans where the user pays for the amount of data transferred. This is because the technology is packet-based. For example, there are service plans where there is a flat rate for the first Gigabyte of data transferred, and a per minute cost for each additional Megabyte.
3G and Voice:
Wireless technologies are a way for mobile users to make free or cheap calls worldwide and save a lot of money due to the latest telephony applications and services. 3G networks have the advantage of being available on the move, unlike Wi-Fi, which is limited to a few meters around the emitting router. So, a user with a 3G phone and a 3G data plan is well-equipped for making free mobile calls. She will only have to download one of the free applications and install on her mobile phone and start making calls.


Other information:
4G refers to the fourth generation of cellular wireless standards. It is a successor to 3G and 2G standards.
The nomenclature of the generations generally refers to a change in the fundamental nature of the service. The first was the move from analogue (1G) to digital (2G) transmission.
This was followed by multi-media support, spread spectrum transmission and at least 200 kbit/s (3G) and now 4G, which refers to all IP packet-switched networks, mobile ultra-broadband (gigabit speed) access and multi-carrier transmission.

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