公开(公告)号：US20170325273A1

公开(公告)日：2017-11-09

申请号：US15148419

申请日：2016-05-06

Applicant: APPLE INC.

Inventor： Raj CHAUGULE ,  Sanjay VERMA ,  Xuqiang HUA ,  Anish GOYAL ,  Deepankar BHATTACHARJEE

IPC: H04W76/02 ,  H04W76/04 ,  H04L29/06 ,  H04W56/00 ,  H04W88/06

CPC classification number: H04W76/15 ,  H04L63/0272 ,  H04L63/164 ,  H04L65/1006 ,  H04L65/1016 ,  H04W36/00 ,  H04W56/001 ,  H04W76/27 ,  H04W88/06

Abstract: A device, system, and method synchronizes network states for a user equipment (UE) during a handover from a first network to a second network while the UE was in a radio resource control (RRC) idle state. The method includes determining whether a first context associated with a first non-default bearer over the first network is stored on the UE. The method includes when the first context is determined, determining a second context associated with a second non-default bearer over the second network is stored on the UE. The method includes transmitting a request to the first network over a default bearer for network state information relative to the first network. The method includes receiving the network state information from the first network, the network state information indicating that the UE does not have the first non-default bearer over the first network established. The method includes deleting the first context.

公开(公告)号：US20170289883A1

公开(公告)日：2017-10-05

申请号：US15476354

申请日：2017-03-31

Applicant: Apple Inc.

Inventor： Krisztian KISS ,  Rafael L. RIVERA-BARRETO ,  Rohan C. MALTHANKAR ,  Vikram Bhaskara YERRABOMMANAHALLI ,  Xuqiang HUA

IPC: H04W36/14 ,  H04W8/26 ,  H04W12/04 ,  H04L29/06 ,  H04W12/06 ,  H04W4/22 ,  H04W76/02

CPC classification number: H04W36/14 ,  H04L63/0892 ,  H04L63/164 ,  H04W4/90 ,  H04W12/001 ,  H04W12/04033 ,  H04W12/06 ,  H04W36/0033 ,  H04W76/12 ,  H04W88/06

Abstract: Apparatus and methods to support handover of emergency services sessions by network elements and by a wireless device between wireless networks are disclosed. The wireless device indicates an emergency services handover to applicable network elements, including an evolved Packet Data Gateway (ePDG), in one more messages when transferring an established emergency services session from a cellular wireless network to an untrusted non-cellular wireless network. In some embodiments, the wireless device includes a predefined string as part of a set of identification data in an IKE_AUTH request message sent to the ePDG. In some embodiments, the wireless device includes a previously allocated IP address within a payload of the IKE_AUTH request message to indicate handover of an existing session. By providing both the predefined “EMERGENCY” string and the previously allocated IP address, the wireless indicates a handover of an emergency services session between wireless networks.