Timing advance management during layer (L1/L2) triggered mobility (LTM)
AssigneeRakuten Mobile, Inc.
InventorsSubramanya Chandrashekar, Koichiro Kitagawa
Life of this patent
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Abstract
The present disclosure describes techniques for timing advance management during layer (L1/L2) Triggered Mobility (LTM). In one aspect, a method comprises obtaining timing advances (TAs) for one or more LTM candidate cells based on indication from a serving gNB-DU and storing the obtained TAs and receiving LTM serving cell switch command to switch from a current serving cell to a target cell. The method further comprises transmitting, a list of candidate cell IDs and the stored TAs corresponding to the list of candidate cell IDs, to the target gNB-DU serving the target cell, in response to the successful completion of the LTM cell switch.
Claims20
An apparatus comprising:
- at least one processor;
- and
- a memory communicatively coupled to the at least one processor, wherein the memory stores processor-executable instructions, which, on execution, cause the at least one processor to:
- obtain, by a User Equipment (UE), timing advances (TAs) for one or more Layer (L1/L2) Triggered Mobility (LTM) candidate cells based on an indication from a serving gNodeB Distributed Unit (gNB-DU) and store the obtained TAs;
- receive, by the UE, an LTM cell switch command to perform an LTM cell switch from a current serving cell to a target cell, wherein the current serving cell is served by the serving gNB-DU and the target cell is served by a target gNB-DU;
- and
- transmit, by the UE to the target gNB-DU serving the target cell, a list of candidate cell IDs and the stored TAs corresponding to the list of candidate cell IDs in response to a successful completion of the LTM cell switch.
A method comprising:
- obtaining, by a User Equipment (UE), timing advances (TAs) for one or more Layer (L1/L2) Triggered Mobility (LTM) candidate cells based on an indication from a serving gNodeB Distributed Unit (gNB-DU) and storing the obtained TAs;
- receiving, by the UE, an LTM cell switch command to perform an LTM cell switch from a current serving cell to a target cell, wherein the current serving cell is served by the serving gNB-DU and the target cell is served by a target gNB-DU;
- and
- transmitting, by the UE to the target gNB-DU serving the target cell, a list of candidate cell IDs and the stored TAs corresponding to the list of candidate cell IDs in response to a successful completion of the LTM cell switch.
A non-transitory computer-readable medium having computer-readable instructions that when executed by a processor causes the processor to perform operations of:
- obtaining, by a User Equipment (UE), timing advances (TAs) for one or more Layer (L1/L2) Triggered Mobility (LTM) candidate cells based on an indication from a serving gNodeB Distributed Unit (gNB-DU) and storing the obtained TAs;
- obtaining, by the UE, an LTM cell switch command to perform an LTM cell switch from a current serving cell to a target cell, wherein the current serving cell is served by the serving gNB-DU and the target cell is served by a target gNB-DU;
- and
- transmitting, by the UE to the target gNB-DU serving the target cell, a list of candidate cell IDs and the stored TAs corresponding to the list of candidate cell IDs, to the target gNB-DU serving the target cell, in response to a successful completion of the LTM cell switch.
Dependencies are inferred from the claim text.