EEG Technology

Abstract

The fourth generation of mobile networks will truly turn the current mobile phonenetworks, in to end to end IP based networks, couple this with the arrival of IPv6,every device in the world will have a unique IP address, which will allow full IP based communications from a mobile device, right to the core of the internet, and back out again. If 4G is implemented correctly, it will truly harmonize globalroaming, super high speed connectivity, and transparent end user performance onevery mobile communications device in the world. 4G is set to deliver 100mbpsto a roaming mobile device globally, and up to 1gbps to a stationary device. Withthisin mind, it allows for video conferencing, streaming picture perfect video andmuch more. It won’t be just the phone networks that need to evolve, the increasedtraffic load on the internet as a whole (imagine having 1 billion 100mb nodesattached to a network over night) will need to expand, with faster backbones andoceanic links requiring major upgrade. 4G won’t happen overnight, it isestimated that it will be implemented by 2012, and if done correctly, should takeoff rather quickly. 4G networks i.e. Next Generation Networks (NGNs) are becoming fast and very cost-effective solutions for those wanting an IP builthigh-speed data capacities in the mobile network. Some possible standards for the4G system are 802.20, WiMAX (802.16), HSDPA, TDD UMTS, UMTS andfuture versions of UMTS. The design is that 4G will be based on OFDM(Orthogonal Frequency Division Multiplexing), which is the key enabler of 4Gtechnology. Other technological aspects of 4G are adaptive processing and smartantennas, both of which will be used in 3G networks and enhance rates whenused in with OFDM. Currently 3G networks still send their data digitally over asingle channel; OFDM is designed to send data over hundreds of parallel streams,thus increasing the amount of information that can be sent at a time