Google is working with Wi-Fi equipment maker Ruckus Wireless to build a large-scale Wi-Fi network in the cloud off of which any business could hang its wireless routers, according to a source familiar with the project who asked not to be named. Google’s plans to supply Wi-Fi services to small and medium-sized businesses was first reported by The Information on Wednesday. But I have gotten more details on what its network would look like and how it would be rolled out. Google has been working closely with Ruckus, trialing a new software-based wireless controller that virtualizes the management functions of the Wi-Fi network in the cloud, according to my source. The end result would be a nationwide — or even global — network that any business could join and any Google customer could access.