PARIS — A commercial and ideological clash is set for next week, when representatives of more than 190 governments, along with telecommunications companies and Internet groups, gather in Dubai for a once-in-a-generation meeting.

The subject: Control of the Internet, politically and commercially.

The stated purpose of the World Conference on International Telecommunications is to update a global treaty on technical standards needed to, say, connect a telephone call from Tokyo to Timbuktu. The previous conference took place in 1988, when the Internet was in its infancy and telecommunications remained a highly regulated, mostly analog-technology business.

Now the Internet is the backbone for worldwide communications and commerce. Critics of the International Telecommunication Union, the agency of the United Nations that is organizing the meeting, see a dark agenda in the meeting. The blogosphere has been raging over supposed plans led by Russia to snatch control of the Internet and hand it to the U.N. agency.