Wi-Fi and Beyond

While broadcasters, cell-phone carriers, and other longtime licensees of spectrum rights are fighting Wi-Fi and other technologies to access the airwaves fro free, engineers are drawing up plans for next-gen technologies to go beyond Wi-Fi. What are they?

Here are three on the boards now:

- smart antennnas
- mesh networks
- agile radios.

Want to know more, go here to see what Business Week has to say about them.