Battery Life Extension For Wlan-Lte Aggregation

To enlarge the cell capacity of mobile network, LTE network offloads its traffic to WLAN network. However, User Equipment (UE) can run out of batteries rapidly due to the independent operation of multi-Radio Access Technologies (RAT), LTE and WLAN. In this paper, we propose new Multi-RAT power saving scheme, Single-RAT Monitoring which remove the duplication of periodic wake up operation. Because UE has both LTE and WLAN modem, LTE modem can monitor the traffic status for WLAN link and then activate or deactivate the WLAN modem. Our performance analysis shows that the WLAN modem applying proposed Single-RAT Monitoring consumes 11% similar to 99% less energy with various traffic pattern.