Back to results
US 2022/0030498 A1Published application
Distributed unit, central unit, radio access network node, and method therefor
AssigneeNEC Corporation
InventorsHisashi FUTAKI, Sadafuku HAYASHI
Life of this patent
Estimating the term…
Abstract
A Distributed Unit (DU) (2) of a base station sends a first message to a Central Unit (1) of the base station in response to detecting initiation of a conditional mobility of a radio terminal (3) from a first cell served by the DU (2) to a second cell. It is thus for example possible to allow a Central Unit (CU) to be aware of satisfaction of an execution condition of a conditional mobility (or initiation of the conditional mobility).
Claims9
A method for a gNB Central Unit (gNB-CU), the method comprising:
- receiving a message from a target gNB Distributed Unit (gNB-DU) the message indicating that a User Equipment (UE) has successfully accessed a target cell the target cell being one of conditional handover candidate cells and served by the target gNB-DU;
- and
- after receiving the message from the target gNB-DU, transmitting a UE Context Release Command message to a gNB-DU which serves a cell which differs from the target cell which the UE has successfully accessed, the UE Context Release Command message including a cause value and requesting the gNB-DU to cancel conditional handover associated to one of the conditional handover candidate cells.
A method for a gNB Distributed Unit (gNB-DU), the method comprising:
- controlling a cell which differs from a target cell which a User Equipment (UE) has successfully accessed during conditional handover from a source gNB-DU to a target gNB-DU within a gNB Central Unit (gNB-CU), the target cell being one of conditional handover candidate cells and served by the target gNB-DU;
- and
- receiving a UE Context Release Command message from the gNB-CU, the UE Context Release Command message including a cause value and requesting the gNB-DU to cancel conditional handover associated to one of the conditional handover candidate cells.
A gNB Central Unit (gNB-CU) comprising:
- at least one memory;
- and
- at least one processor coupled to the at least one memory and configured to:
- receive a message from a target gNB Distributed Unit (gNB-DU), the message indicating that a User Equipment (UE) has successfully accessed a target cell during conditional handover from a source gNB-DU to the target gNB-DU within the gNB-CU, the target cell being one of conditional handover candidate cells and served by the target gNB-DU;
- and
- after receiving the message from the target gNB-DU, transmit a UE Context Release Command message to a gNB-DU which serves a cell which differs from the target cell which the UE has successfully accessed, the UE Context Release Command message including a cause value and requesting the gNB-DU to cancel conditional handover associated to one of the conditional handover candidate cells.
3 more elements
Dependencies are inferred from the claim text.