Conditional fallback configuration for MCG-RLF
AssigneeNokia Technologies Oy
InventorsSubramanya Chandrashekar, Srinivasan Selvaganapathy, Ahmad Awada, Amaanat Ali, Tero Henttonen
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Abstract
Improved techniques of handover involving dual connectivity configuration with CHO include configuring a UE with a conditional fallback configuration (CFC) linked to M-RLF event at the source MN. Specifically, the MN prepares a fallback configuration along with the CHO configuration for the UE. This fallback configuration is provided to the UE as a conditional configuration, but this is not linked to measurement-event but rather to a radio link failure event. The condition is linked to MCG-RLF along with additional measurement criteria.
Claims14
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 user equipment in a network, measurement data to a master network node serving the user equipment, the measurement data representing a measurement report;
- receive, from the master network node, radio resource control reconfiguration data representing a radio resource control reconfiguration, the radio resource control reconfiguration including a conditional fallback configuration linked to a master cell group radio link failure event at the master network node, wherein the conditional fallback configuration includes a required condition for fallback configuration;
- based on the required condition for the conditional fallback configuration being met, run a Timing Advance (TA) timer at a secondary cell group associated with a secondary network node;
- and
- based on the TA timer running at the secondary cell group when the required condition for the conditional fallback configuration is met, transmit a scheduling request using a dedicated scheduling request resource mapped to the conditional fallback configuration.
A method, comprising:
- transmitting, by a user equipment in a network, measurement data to a master network node serving the user equipment, the measurement data representing a measurement report;
- receiving, from the master network node, radio resource control reconfiguration data representing a radio resource control reconfiguration, the radio resource control reconfiguration including a conditional fallback configuration linked to a master cell group radio link failure event at the master network node, wherein the conditional fallback configuration includes a required condition for fallback configuration;
- based on the required condition for the conditional fallback configuration being met, a Timing Advance (TA) timer is running at a secondary cell group associated with a secondary network node;
- and
- based on the TA timer running at the secondary cell group when the required condition for the conditional fallback configuration is met, transmit a scheduling request using a dedicated scheduling request resource mapped to the conditional fallback configuration.
Dependencies are inferred from the claim text.