Verizon and T-Mobile join forces in fight for Wi-Fi airwaves

A plan to use Wi-Fi airwaves for cellular service has sparked concerns about interference with existing Wi-Fi networks, causing a fight involving wireless carriers, cable companies, a Wi-Fi industry trade group, Microsoft, and network equipment makers.

Verizon Wireless and T-Mobile US plan to boost coverage in their cellular networks by using unlicensed airwaves that also power Wi-Fi equipment. While cellular carriers generally rely upon airwaves to which they have exclusive licenses, a new system called LTE-Unlicensed (LTE-U) would have the carriers sharing spectrum with Wi-Fi devices on the unlicensed 5GHz band.

Verizon has said it intends to deploy LTE-U in 5GHz in 2016. Before the interference controversy threatened to delay deployments, T-Mobile was expected to use the technology on its smartphones by the end of 2015. Wireless equipment makers like Qualcomm see an opportunity to sell more devices and are integrating LTE-U into their latest technology.