Mobility enhancements for unlicensed operation
AssigneeQUALCOMM Incorporated
InventorsOzcan Ozturk, Xiaoxia Zhang
Life of this patent
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Abstract
This disclosure provides systems, methods and apparatuses for a user equipment (UE) performing Listen Before Talk (LBT) procedures during a handover, such as during a dual active protocol stack (DAPS) handover or a conditional handover. During the handover, the UE may have a source connection with a source cell. If the source cell is unlicensed, the UE may perform LBT for a channel of the source cell. The UE may establish a target connection with a target cell before releasing the source connection with the source cell. If the target cell is unlicensed, the UE may perform LBT for a channel of the target cell.
Claims35
A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
- receiving a message including information associated with a handover of the UE from a source cell to a target cell;
- and
- performing, during the handover, Listen Before Talk (LBT) on a channel of the source cell after receiving the message and until a stopping condition occurs,
- wherein LBT is performed on a channel of the target cell during the handover based on receiving the message.
A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
- determining that a secondary node (SN) change of the UE is triggered;
- and
- performing, during the SN change, Listen Before Talk (LBT) on one or more of a channel of an unlicensed source secondary cell or a channel of an unlicensed target secondary cell.
An apparatus of a user equipment (UE) for wireless communication, comprising:
- a processing system configured to:
- receive a message including information associated with a handover of the UE from a source cell to a target cell;
- and
- perform, during the handover, Listen Before Talk (LBT) on a channel of the source cell after receiving the message and until a stopping condition occurs,
- wherein LBT is performed on a channel of the target cell during the handover based on receiving the message.
An apparatus of a user equipment (UE) for wireless communication, comprising:
- a processing system configured to:
- determine that a secondary node (SN) change of the UE is triggered;
- and
- perform, during the SN change, Listen Before Talk (LBT) on one or more of a channel of an unlicensed source secondary cell or a channel of an unlicensed target secondary cell.
Dependencies are inferred from the claim text.