SCell SSB Transition Signaling for Faster Activation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The activation latency of secondary cells (SCells) in wireless communication systems, such as 5G NR, is high due to the long periods between synchronization signal block (SSB) transmissions, which hinders efficient cell search, automatic gain control, and other activation functions.
Innovation Solution
Configuring a set of SSBs for a transition period using medium access control (MAC) control elements (CE) instead of radio resource control (RRC) to facilitate quicker SCell activation by enabling more compact and timely SSB measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If SSB transmissions use long periods between transmissions, then energy consumption is reduced and device complexity is lowered, but activation latency increases
Solution Approach 1:
The patent configures a transition period with multiple SSB transmissions before the SCell is fully activated. During this transition period, the UE can perform measurements and preparations in advance, so that when activation is needed, the process is already partially complete, reducing the overall activation latency.
Solution Approach 2:
The patent introduces a dynamic transition period between deactivated and activated states, where SSB transmissions occur at specific intervals during this period. This dynamic approach allows the system to adapt the measurement and activation process to actual needs, balancing energy consumption with activation speed requirements.
2Loss of time
If SSB measurements are performed during transition period, then activation latency is reduced, but device complexity and measurement processing load increase
Solution Approach 1:
The UE performs SSB measurements during the transition period before full activation. By conducting measurements in advance during this configured period, the UE prepares measurement results that can be quickly utilized when activation is triggered, reducing the time needed for activation without requiring complex real-time processing during the activation moment itself.
Data Source
AI summary
The apparatus may be a wireless device configured to receive a configuration for SSBs associated with a SCell for a transition period associated with a transition from a deactivated state of the SCell to an activated state of the SCell for the UE and measure, during the transition period associated with an activation of the SCell for the UE, a first set of SSBs from the SCell based on the configuration. The apparatus may be a network device configured to output a configuration for SSBs from a SCell associated with a transition period from a deactivated state of the SCell to an activated state of the SCell for a UE, and output, during the transition period associated with an activation of the SCell for the UE, a first set of SSBs from the SCell based on the configuration.