Small data transmission without path switch procedure
AssigneeLG Electronics Inc.
InventorsSeokjung KIM, Jian XU, Daewook BYUN
Life of this patent
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Abstract
A method and apparatus for small data transmission without a path switch procedure in a wireless communication system is provided. A new gNB, which is a radio access network (RAN) node to which a wireless device attempts a connection resume procedure while in an inactive state, receives an anchor kept indication and/or a small data indication from a last serving gNB. The anchor kept indication indicates that the last serving gNB keeps a user equipment (UE) context and/or a UE-associated NG connection with the core network. The small data indication indicates not relocating a UE context from the last serving gNB to the new gNB.
Claims13
A method for a gNB in a wireless communication system, the method comprising:
- receiving a resume request message from a wireless device;
- receiving an anchor kept indication from a last serving gNB;
- transmitting downlink (DL) user plane (UP) transport network layer (TNL) information to the last serving gNB;
- receiving DL data from a core network via the last serving gNB based on the DL UP TNL information;
- and
- forwarding the DL data to the wireless device.
- wherein the anchor kept indication indicates that the last serving gNB keeps a user equipment (UE) context and/or a UE-associated NG connection with the core network.
A method for a gNB in a wireless communication system, the method comprising:
- receiving a resume request message from a wireless device;
- receiving a user equipment (UE) Context Retrieve Failure message including a small data indication from a last serving gNB;
- Upon receiving the UE Context Retrieve Failure message, transmitting downlink (DL) user plane (UP) transport network layer (TNL) information to the last serving gNB;
- receiving a resume message from the last serving gNB and forwarding the resume message to the wireless device;
- receiving DL data from a core network via the last serving gNB based on the DL UP TNL information;
- forwarding the DL data to the wireless device;
- and
- receiving a resume complete message from the wireless device and forwarding the resume complete message to the last serving gNB,
- wherein the small data indication indicates not relocating a UE context from the last serving gNB to the gNB.
Dependencies are inferred from the claim text.