Nobody had predicted the scale of impact of （ ） communications and that it world be one of the largest businesses in the history of mankind with and immense impact on all economies.
Deploying enhanced broadband services over existing network infrastructure （ ）in increase of the network complexity and therefore,extra expenses on network management and maintenanc
The approaching 4G mobile communication systems are projected to （ ） still remaining problems of 3G systems and to provide （ ） new services ,from high-quality voice to high-definition video to high data-rate wireless channels.