Research Article

Enabling LTE and WiFi Coexisting in 5 GHz for Efficient Spectrum Utilization

Figure 1

Current LTE and WiFi coexistence methods. (a) shows the channel utilization of LTE in licensed bands; LTE is a kind of scheduled networks in licensed bands; therefore, LTE always allocates the channel if there exists mobile traffic; (b) shows the channel utilization of LTE-U, which uses duty cycle to free channel to WiFi in fixed time domain; (c) shows the channel utilization of LAA, in which LTE shares the channel with WiFi by using Listen-Before-Talk (LBT) mechanism.
(a) Licensed LTE channel allocation
(b) LTE-U channel allocation
(c) LAA channel utilization