A lack of competition in the backhaul market threatens to delay the buildout of 5G networks, FCC chairman Tom Wheeler told a US Senate committee.

Back in April, Wheeler backed a new regulatory framework so customers could more easily switch provider for so-called Business Data Services (previously known as Special Access lines), used by operators to connect cell towers and antennas.

The same lines are used by small businesses, retailers, banks, manufacturers, schools, hospitals, and universities to shift data.

Supplying backhaul is a profitable activity for the largest carriers in the US, notably AT&T and Verizon. Others, including Sprint, complain the market is uncompetitive.

“To seize the opportunities to increase the deployment of mobile networks and to move towards 5G connectivity, we’re going to need a lot more backhaul to handle the massive increase in data traffic,” argued Wheeler to the Senate Committee on Commerce, Science and Transportation.

To achieve that goal, Wheeler reckons the backhaul market needs a shake-up.

“The Commission has a long and complicated history with Business Data Services and the time has come for action. Reform is supported by the nation’s leading wireless carriers, save one, and my goal is to conclude this proceeding no later than the end of this year,” said Wheeler, without naming the single carrier who’s not supporting his proposal.

In addition to Business Data Services, Wheeler updated the committee on a number of other areas regulated by the FCC, including the ongoing incentive auction and privacy.