COMPARISON BETWEEN 3G AND 4G: Technology 3G 4GFrequency band 1.8 - 2.5GHz 2 - 8GHzBandwidth 5-20MHz 5-20MHz Data rate Up to 2Mbps 100Mbps moving, 1GB stationary Access W-CDMA VSF-OFCDM VSFCDMA FEC Turbo-codes ConcatenatedSwitching Circuit/Packet Packet
Convergence Services—seamless , high-reliable, quality broadband communication ,ubiquitous- connectivity.Broadband Services---Low Cost. ---Wide Coverage Area. ---Wide Variety of Services Capability.
LTE[Long Term Evolution]—UMTS(universal mobile telecomm. Systems) Objectives : Improving Efficiency. Lowering Costs. Improving Services. Better integration with other standards. Aim of LTE : Download rate - 100mbps Upload rate-50 mbps.
WIMAX-[Worldwide Interoperability for Microwave Access] Objective: Low Cost. Low Expense Voice transport and delivery of services. Aim: Download data-rate 4 mbps. Upload data-rate 14 mbps.
Adaptive Modulation And Coding(AMC). Adaptive Hybrid ARQ.Multi In-Multi Out And Orthogonal Frequency-Division Multiplexing(MIMO and OFDM).Open Distributed AD-HOC Wireless Network.
Flexible channel bandwidth—5 MHz to 20 Mhz. (up to 40 MHz)Developing of 3G applications: MMS(multimedia messaging services). Video chat. Mobile T.V. HDTV.
STRENGTHS: Strong position of telecommunication vendors. Faster data transmissions . Higher bit-rate . Larger bandwidth. Personalized multimedia communication tools.WEAKNESS: No large user community . Divergence between vendors and operators. No full internet -- limited speed ,bandwidth Highest cost to use and on infrastructure.
OPPORTUNITIES: Evolutionary approach. Sophisticated commercialization would encourage e-commerce and m-commerce. Expected that consumers will replace handsets with newer tech. Desirable higher data capacity rates.THREATS: Faster rate of growth and developments in other region. Since 3G is still in market ,it squeezes the market competition in mobile industry.
4G mobile phone technology promises faster communicationSpeeds (100 megabits per second), capacity and diverse usageformats. These formats would provide richer content and support for other public networks such as optical fibre and wireless local area networks.
Delivers true speeds without wires.Faster -- more bandwidth.Completely portable .3 times faster than 3G .4G is broadband technology that will give us richer ,pleasurableinternet experience.