• Patent Title: Fast return to 5G systems (5GS) after handover to evolved packet system (EPS) due to EPS fallback from 5GS
  • Application No.: US17310276
    Application Date: 2020-01-29
  • Publication No.: US11937132B2
    Publication Date: 2024-03-19
  • Inventor: Changhong Shan
  • Applicant: Apple Inc.
  • Applicant Address: US CA Cupertino
  • Assignee: Apple Inc.
  • Current Assignee: Apple Inc.
  • Current Assignee Address: US CA Cupertino
  • Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
  • International Application: PCT/US2020/015719 2020.01.29
  • International Announcement: WO2020/160177A 2020.08.06
  • Date entered country: 2021-07-27
  • Main IPC: H04W36/00
  • IPC: H04W36/00 H04W36/14 H04W36/26
Fast return to 5G systems (5GS) after handover to evolved packet system (EPS) due to EPS fallback from 5GS
Abstract:
Some embodiments of this disclosure include apparatuses and methods for managing a fast return of a user equipment (UE) to 5G systems (5GS) after handover to Evolved Packet System (EPS) due to EPS fallback from 5GS. The method can include at least generating a handover request including an indication indicating a handover reason of no presence of quality of service (QoS) flow for a voice signal to the UE; receiving a handover command generated by an access and mobility management function (AMF) to transfer the UE from the 5GS to the EPS based on the handover request; transmitting the handover command to the UE for the UE to establish a connection with the EPS; and after the flow of the voice signal has terminated, reestablishing a connection with the UE to reconnect the UE to the 5GS, wherein the connection with the BS is re-established based on a target ID of the BS.
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