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US 2024/0406833 A1Published application
Scg-maintained conditional handover in dual connectivity with scg failure
AssigneeNokia Technologies Oy
InventorsFaranaz SABOURI-SICHANI, Srinivasan SELVAGANAPATHY, Ahmad AWADA, Subramanya CHANDRASHEKAR
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Abstract
Techniques of configuring and executing CHO include including in a RRC reconfiguration of the UE, during a CHO configuration process in which a PSCell is unchanged, include (i) an indicator indicating that the secondary cell group (SCG) remains the same after the CHO has been executed and (ii) a value SCG and determining whether a user equipment (UE) should attempt to access the SCG after execution of the CHO has begun.
Claims21
An apparatus, comprising:
- at least one processor;
- and
- at least one memory including computer program code;
- the at least one memory and the computer program code configured to cause the apparatus at least to:
- transmit, by a source master node within a network to a target master node within the network, request data representing a request to prepare execution of a conditional handover involving a user equipment served by the source master node and a source secondary node;
- receive, by the source master node from the target master node, response data representing configuration information for a secondary cell group associated with a target secondary node and the target master node, the configuration information including an indicator indicating that a primary secondary cell of the secondary cell group remains the same after the execution of the conditional handover;
- transmit, by the master source node to the user equipment, configuration data representing (i) the configuration information for the secondary cell group and (ii) a value of at least one parameter, the at least one parameter causing the user equipment to control reporting of a radio link failure at the secondary cell group and before the execution of the conditional handover has begun;
- after transmitting the configuration data to the user equipment, receive, by the source master node from the user equipment, failure data indicating that the user equipment detected a radio link failure at the secondary cell group;
- and
- determine, by the source master node, an action to take to respond to the detected radio link failure at the secondary cell group, the action being based on the configuration information for the secondary cell group.
7 more elements
A method, comprising:
- transmitting, by a source master node within a network to a target master node within the network, request data representing a request to prepare execution of a conditional handover involving a user equipment served by the source master node and a source secondary node;
- receiving, by the source master node from the target master node, response data representing configuration information for a secondary cell group associated with a target secondary node and the target master node, the configuration information including an indicator indicating that a primary secondary cell of the secondary cell group remains the same after an execution of the conditional handover;
- transmitting, by the master source node to the user equipment, configuration data representing (i) the configuration information for the secondary cell group and (ii) a value of at least one parameter, the at least one parameter causing the user equipment to control reporting of a radio link failure at the secondary cell group and after the execution of the conditional handover has begun;
- after transmitting the configuration data to the user equipment, receiving, by the source master node from the user equipment, failure data indicating that the user equipment detected a radio link failure at the secondary cell;
- and
- determining, by the source master node, an action to take to respond to the detected radio link failure at the secondary cell group, the action being based on the configuration information for the secondary cell group.
3 more elements
An apparatus, comprising:
- at least one processor;
- and
- at least one memory including computer program code;
- the at least one memory and the computer program code configured to cause the apparatus at least to:
- receive, by a user equipment served by a source master node and a source secondary node as part of a conditional handover to a target master node and a source secondary node, configuration data representing (i) configuration information for a secondary cell group associated with the target secondary node and the target master node, and (ii) a value of at least one parameter, the configuration information including an indication that a primary secondary cell of the secondary cell group remains the same before an execution of the conditional handover, the at least one parameter causing the user equipment to control reporting of a radio link failure at the secondary cell group after the execution of the conditional handover has begun;
- detect, by the user equipment, a radio link failure at the secondary cell group;
- and
- after detecting the radio link failure, perform, by the user equipment, measurements of a signal quality metric at the secondary cell group.
5 more elements
21-31. (canceled)
Dependencies are inferred from the claim text.