Adaptive SSB-to-RO Mapping After Activation Changes
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Solution Overview
Problem
In wireless communications systems, changes in the quantity of activated synchronization signal block (SSB) occasions within an SSB burst can lead to unclear mappings between SSB occasions and random access occasions (ROs), necessitating dynamic updates to optimize power consumption and communication efficiency.
Innovation Solution
User equipment (UE) receives signaling indicating a change in the quantity of activated SSB occasions and adapts the mapping to ROs based on this change, applying the mapping after a specified time duration has elapsed, allowing for dynamic and adaptive synchronization signal block occasion to random access occasion mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the quantity of activated SSB occasions is changed dynamically, then power consumption and communication efficiency are optimized, but the mapping between SSB occasions and ROs becomes unclear
Solution Approach 1:
The patent implements dynamic SSB occasion activation where the network can activate or deactivate specific SSB occasions within an SSB burst based on current network conditions and UE requirements. This dynamic configuration allows the system to adapt to changing traffic patterns and optimize resource utilization while maintaining clear mapping relationships through updated signaling.
Solution Approach 2:
The patent employs feedback mechanisms where the network signals the UE about changes in activated SSB occasions through RRC signaling or system information. This feedback ensures that the UE maintains an accurate understanding of the current SSB-RO mapping relationships even as the configuration changes dynamically, preventing mapping ambiguity.
2Adaptability or versatility
If the mapping between SSB occasions and ROs is updated dynamically, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The patent establishes preliminary mapping relationships between SSB occasions and ROs that are defined in advance through configuration signaling. When dynamic changes occur, the system updates the mapping based on pre-defined rules and relationships, reducing the computational complexity required for real-time mapping management while maintaining high adaptability.
3Loss of energy
If SSB occasions are deactivated to save power, then energy consumption is reduced, but random access capability is degraded
Solution Approach 1:
The patent applies local quality optimization by selectively activating or deactivating specific SSB occasions within an SSB burst based on local network conditions, UE location, and traffic requirements. This allows the system to reduce power consumption by deactivating unnecessary SSB occasions while maintaining random access capability through carefully selected activated occasions that preserve essential access functionality.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive signaling indicating a change in a quantity of one or more activated synchronization signal block (SSB) occasions in an SSB burst and may transmit a random access message via a random access occasion (RO) based on a mapping of the one or more activated SSB occasions to a plurality of ROs. In some cases, the mapping may adapt based to the change based on whether the change in the quantity of the one or more activated SSB occasions is an increase or a decrease. Additionally, the mapping may be based on a time durations elapsing after the UE receives the signaling. For example, the UE may apply, generate, receive, obtain, or reference the mapping after the time duration has elapsed since receiving the signaling.