A wireless access node serves a wireless User Equipment (UE) over radio frequency bands that comprise layers. The layers comprise parallel signals that share individual resource blocks in the radio frequency bands. In the wireless access node, radio circuitry wirelessly receives information from the wireless UE that indicates received signal strengths for the radio frequency bands. In the wireless access node, processing circuitry determines layer amounts for the radio frequency bands. The processing circuitry selects one of the radio frequency bands that has an adequate one of the received signal strengths and a higher one of the layer amounts. The radio circuitry wirelessly exchanges user data with the wireless UE over the selected one of the radio frequency bands to serve the wireless UE.