Long Term Evolution-Advanced (LTE-A) is the project name of the evolved version of LTE that is being developed by 3GPP. LTE-A will meet or exceed the requirements of the International Telecommunication Union (ITU) for the Fourth Generation (4G) radio communication standard known as IMT-Advanced. LTE-Advanced is being specified initially as part of Release 10 of the 3GPP specifications, with a functional freeze targeted for March 2011. The LTE specifications will continue to be developed in subsequent 3GPP releases. Wireless communications have evolved from the so-called Second Generation (2G) systems of the early 1990s, which first introduced digital cellular technology, through the deployment of Third Generation (3G) systems with their higher speed data networks to the much-anticipated fourth generation technology being developed today.