公开(公告)号：US11160113B2

公开(公告)日：2021-10-26

申请号：US15877268

申请日：2018-01-22

Applicant: APPLE INC.

Inventor： Jing Zhu ,  Yi Gai

IPC: H04W74/08 ,  H04W36/30 ,  H04W36/00

Abstract: Technology for switching from a wireless local area network (WLAN) to a wireless wide area network (WWAN) is disclosed. A multi-radio access technology (multi-RAT) user equipment (UE) can receive WLAN-specific dedicated physical random access channel (PRACH) allocation information from an evolved node B (eNB) to enable the multi-RAT UE to perform an inter-RAT WLAN-to-WWAN handover. The multi-RAT UE can initiate the inter-RAT WLAN-to-WWAN handover at the multi-RAT UE by performing random access with the eNB using the WLAN-specific dedicated PRACH allocation information.