WiMAX

WiMAX is often recognized as 4G. This Mobile WiMAX, IEEE 802.16e-2005, is a mobile wireless broadband access (MWBA) that provides maximum data rate of 56 Mbps in uplink and 128 Mbps in downlink, on 20 MHz wide channels. A new and enhanced version of 802.16e is currently in development. It is currently being known as IEEE 802.16m and its purpose is to accomplish the standards of IMT-Advanced to provide 100Mbps for mobile client and 1 Gbps for motionless client. As for now, only Sprint Nextel has confirmed to use the WiMAX for its 4G network.

IPv6

The 3G was based on two corresponding infrastructures with, in order of, packet switched and circuit switched network nodes. Whereas the 4G, will only be based on Packet switched network.

It is anticipated that the IPv4 address exhaustion procedure will be in its last phase, when 4G will be positioned. Thus, the IPv6 is necessary, so the numerous wireless enabled devices in 4G can be supported. The IPv6 will increase the quantity of IP addresses and so the necessity for NAT (Network Address Translation) will be no longer required. However, in spite of everything, Nat will be necessary to connect with the devices available on IPv4 networks. In case you don’t know, the NAT is a technique of sharing restricted quantity of addresses between the bigger groups of devices. As for now, on June 2009, only Verizon has issued the conditions that are need for any 4G devices network to support IPv6.