Invention Grant
- Patent Title: Dual radio operation between access systems using 3GPP radio access technology
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Application No.: US16867357Application Date: 2020-05-05
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Publication No.: US11172413B2Publication Date: 2021-11-09
- Inventor: Alexandre Saso Stojanovski , Muthaiah Venkatachalam
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: H04W36/00
- IPC: H04W36/00 ; H04W88/06 ; H04W36/14 ; H04W76/28 ; H04W60/04 ; H04L29/12 ; H04W8/26 ; H04W36/16

Abstract:
Systems and methods of providing 5G access for a UE are generally described. The UE is simultaneously connected via dual radio operation to a legacy and 5G access system. The UE mobility management states for the access systems are independent of each other. The EPC and 5G CN share an HSS and may share a IP anchor. When handover occurs between access systems, the IP address is retained and the IP anchor used when the UE transmits an Attach Request having a Handover Attach Request Type and otherwise a new IP address is provided and the HSS but not the IP anchor is common between the access systems. The 5G eNB to which the UE is connected is standalone and connected to the 5G CN or dual mode and connected with an EPC via an LTE anchor in addition to the 5G CN.
Public/Granted literature
- US20200267607A1 Dual Radio Operation Between Access Systems Using 3GPP Radio Access Technology Public/Granted day:2020-08-20
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