Julius Genachowski, chairman of the Federal Communications Commission, plans to propose a new so-called net neutrality rule Monday that would prevent wireless companies from blocking Internet applications, according to a source at the agency.

An official confirmed that Genachowski will discuss the rules Monday during a keynote speech at The Brookings Institute. He isn't expected to drill into many details about the new rule except to propose that an additional guideline for networks be clear that they can't discriminate, or act as gatekeepers, of Web content.