Mobile Beam Activation With Synchronized TCI State Reuse
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Solution Overview
Problem
The existing beam management procedure in wireless communication networks requires additional time for extra SSB reception when synchronizing with a target TCI state, leading to increased activation latency.
Innovation Solution
A method where a user equipment (UE) reports synchronization status of reference signal resources, allowing the network to transmit a downlink channel with a target TCI state without the need for additional SSB reception if the resource is already synchronized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network always assumes extra SSB reception time is required for beam activation, then the network can ensure reliable beam synchronization, but the activation latency increases
Solution Approach 1:
The network performs preliminary actions by maintaining a history of synchronized TCI states and proactively determining whether a target TCI state is already synchronized before initiating beam activation. This preliminary check eliminates the need for unnecessary extra SSB reception, thereby reducing activation latency while ensuring reliable synchronization when needed.
Solution Approach 2:
The invention implements feedback mechanisms where the network tracks and stores information about previously synchronized TCI states. This feedback loop allows the network to make informed decisions about whether extra SSB reception is actually needed, balancing reliability requirements with latency reduction by only performing additional synchronization when necessary.
2Reliability
If the network performs extra SSB reception for all TCI state activations, then beam synchronization is ensured, but network resources are wasted on redundant operations
Solution Approach 1:
The network performs preliminary checks using stored history information to determine whether a target TCI state is already synchronized before initiating beam activation procedures. This preliminary action prevents redundant extra SSB reception operations, thereby conserving network resources while maintaining synchronization reliability when actually needed.
Solution Approach 2:
The invention utilizes and stores previously obtained synchronization information about TCI states. By recovering and reusing this historical synchronization data, the network avoids redundant SSB reception operations, reducing energy consumption and resource waste while maintaining reliable beam synchronization through intelligent reuse of past synchronization results.
Data Source
AI summary
Beam activation procedures with respect to user equipment and network node are described. An apparatus may transmit a measurement report to the network according to a reporting configuration. The measurement report indicates that at least one reference signal (RS) resource has been synchronized by the apparatus. The apparatus may receive an activation command from the network. The activation command may indicate a target transmission configuration indicator (TCI) state which is not in an active TCI state list. The apparatus may determine whether the RS resource associated with the target TCI state has been reported as synchronized. The apparatus shall be able to receive downlink (DL) channel with the target TCI state from the network after an acknowledgement from the apparatus for activation command is received by the network in an event that the RS resource associated with the target TCI state has been reported as synchronized in the measurement report.