This is very interesting question and I give an overview as
4G wireless technology Features:
It is referred to “MAGIC” which stands for Mobile multimedia, Any-where, Global mobility solutions over, integrated wireless and Customized services.4G is all about convergence; convergence of wired and wireless networks, wireless technologies including GSM, wireless LAN, and Bluetooth as well as computers, consumer electronics, communication technology and several others. 4G is a Mobile multimedia, anytime anywhere, Global mobility support, integrated wireless solution, and customized personal service network system 4G is an all IP-based integrated system will be capable to provide 100 Mbps for high mobility and 1 Gbps for low mobility with end-to-end QoS and high security, and will offering various services at any time as per user requirements, anywhere with seamless interoperability, at affordable cost. The user services include IP telephony, ultra-broadband Internet access, gaming services and High Definition Television (HDTV) streamed multimedia. ITU has specified IMT-A (IMT-Advanced) for 4G standards.
4.5G wireless technology Features:
LTE Advanced is the next wireless upgrade, beyond LTE/4G – essentially 4.5G which is faster better in user experience and highly efficient in spectrum use.Average user download speeds should be 2x-3x that of vanilla LTE. This suggests real (typical / average) download speeds on LTE Advanced could be 14-21Mbps ( vs. 7-12 Mbps over early LTE/4G). LTE -A to its higher speeds, far greater spectrum efficiency and use of Heterogeneous network, can boost network capacity by 3x-5x (vs 4G). LTE Advanced will enhance customer experience via much lower latency. Delays between click & download will be cut by >50% (4G: 12ms vs 4.5G: 5ms). LTE Advanced is a spectrum-efficient technology. Moreover, operators can use different spectrum bands on the same network service. Previously-segregated spectrum is grouped together in to broader bands. Carrier aggregation is key – up to five carriers can be used on 4.5G. Wider spectrum bands will boost speeds. LTE Advanced signals a shift to Intelligent Networks. 4.5G technology should be able to adapt to changing network environments - uneven loads, switch between macro & pico cells, power-down during low traffic periods etc. LTE Advanced will offer better signal / range for base stations, while the use of heterogeneous networks(combination of Pico, Micro and Femto) and MIMO will boost 4.5G performance much further.We expect vanilla LTE/4G lead markets to be the first to roll out LTE Advanced – these operators include Verizon W, AT&T, Sprint, DoCoMo, SK, KT, LG, Telia, Telenor. Roll-outs could start in 2013.
Source: Tondare, S. M., S. D. Panchal, and D. T. Kushnure. "Evolutionary steps from 1G to 4.5 G." International Journal of Advanced Research in Computer and Communication Engineering 3, no. 4 (2014).
This is very interesting question and I give an overview as
4G wireless technology Features:
It is referred to “MAGIC” which stands for Mobile multimedia, Any-where, Global mobility solutions over, integrated wireless and Customized services.4G is all about convergence; convergence of wired and wireless networks, wireless technologies including GSM, wireless LAN, and Bluetooth as well as computers, consumer electronics, communication technology and several others. 4G is a Mobile multimedia, anytime anywhere, Global mobility support, integrated wireless solution, and customized personal service network system 4G is an all IP-based integrated system will be capable to provide 100 Mbps for high mobility and 1 Gbps for low mobility with end-to-end QoS and high security, and will offering various services at any time as per user requirements, anywhere with seamless interoperability, at affordable cost. The user services include IP telephony, ultra-broadband Internet access, gaming services and High Definition Television (HDTV) streamed multimedia. ITU has specified IMT-A (IMT-Advanced) for 4G standards.
4.5G wireless technology Features:
LTE Advanced is the next wireless upgrade, beyond LTE/4G – essentially 4.5G which is faster better in user experience and highly efficient in spectrum use.Average user download speeds should be 2x-3x that of vanilla LTE. This suggests real (typical / average) download speeds on LTE Advanced could be 14-21Mbps ( vs. 7-12 Mbps over early LTE/4G). LTE -A to its higher speeds, far greater spectrum efficiency and use of Heterogeneous network, can boost network capacity by 3x-5x (vs 4G). LTE Advanced will enhance customer experience via much lower latency. Delays between click & download will be cut by >50% (4G: 12ms vs 4.5G: 5ms). LTE Advanced is a spectrum-efficient technology. Moreover, operators can use different spectrum bands on the same network service. Previously-segregated spectrum is grouped together in to broader bands. Carrier aggregation is key – up to five carriers can be used on 4.5G. Wider spectrum bands will boost speeds. LTE Advanced signals a shift to Intelligent Networks. 4.5G technology should be able to adapt to changing network environments - uneven loads, switch between macro & pico cells, power-down during low traffic periods etc. LTE Advanced will offer better signal / range for base stations, while the use of heterogeneous networks(combination of Pico, Micro and Femto) and MIMO will boost 4.5G performance much further.We expect vanilla LTE/4G lead markets to be the first to roll out LTE Advanced – these operators include Verizon W, AT&T, Sprint, DoCoMo, SK, KT, LG, Telia, Telenor. Roll-outs could start in 2013.
Source: Tondare, S. M., S. D. Panchal, and D. T. Kushnure. "Evolutionary steps from 1G to 4.5 G." International Journal of Advanced Research in Computer and Communication Engineering 3, no. 4 (2014).