In a wireless communication network, a primary access node wirelessly serves User Equipment (UEs) over a primary radio channel. A secondary access node wirelessly serves the UEs over a secondary radio channel. The primary access node determines uplink interference. The primary access node processes the uplink interference to select a new primary radio channel size and a new secondary radio channel size. The primary access node wirelessly serves the UEs over the primary radio channel having the new primary channel size. The secondary access node wirelessly serves the UEs over the secondary radio channel having the new secondary channel size.