INTRODUCTION::: Over the last few decades internet has been playing a vital role in our day to day lives.E-mails, Instant Messaging (IMs),etc are some of the gifts of internet to us.
communication is much simpler today as compared to earlier times.keeping up with Friends and Colleagues is very easy with the invention and seemingly endless expansion of Social Networking sites like Facebook, Orkut, MySpace, Twitter etc.
day by day we are heading towards advancement. things are getting compact,lighter and more powerful.
4G HISTORY:::As we know that 4G is the successor of 3G,so 3G employes two basic standards::
W-CDMA and
CDMA2000.
the former is used in europe and the latter is USA.In CDMA, one signal carries the data, this is then multiplied with a signal with a faster rate,
that his more bandwidth, it uses TDM (Time Division Multiplexing). CDMA200 uses CDM (common code division multiplexing) .
About 4G:: 4G stands for Fourth Generation Technology .In 2009 IMT-Advanced (International Mobile Telecommunications Advanced) specified the requirements of 4G with a promising speed of
100 Mb/s for high mobility communications such as trains and cars and 1 GB/s for low mobility communication such as( pedestrians and stationary users).
Some possible standards for the 4G system are 802.20, WiMAX (802.16), HSDPA, TDD UMTS, UMTS and future versions of UMTS and proprietary networks from ArrayComm Inc., Navini Networks, Flarion Technologies, and 4G efforts in India, China and Japan.
The key enabler of 4 G techonology are OFDM (Orthogonal Frequency Division Multiplexing) ,adaptive processing and smart antennas. OFDM id designed to send data over hundreds of parallel streams thereby increasing the amount of informations that can be sent as compared to traditional CDMA.
unlike 3G ,it is completely based on packet switching only,thus it requires low-latency data transmission.IPV6 is an inetgral part in context to 4G technolgy and is essential in order to support large number of wireless-enabled devices.
IPV6 removes the need for network address translation which is a method of sharing a limited number of addresses among a larger group of devices,by increasing the number of ip addresses.
A 4G system is expected to provide a comprehensive and secure all-IP (Internet Protocol) based mobile broadband solution to Laptop Computers, Wireless MODEMs, Smartphones, and other Mobile Devices. Facilities such as Ultra-Broadband Internet access, IP telephony, Gaming Services, and Streamed Multimedia may be provided to users.
Services, and Streamed Multimedia may be provided to users.
The word MAGIC also refers to 4G technology which stands for Mobile multimedia, Any-where, Global mobility solutions over, Integrated wireless and Customized services.
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