Joint Adaptation of Control Channels and Search Space Set Groups
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in adapting control channels and other configurations, leading to higher latency and increased signaling overhead due to the slower RRC reconfiguration process compared to dynamic L1-based signaling, which affects power savings and reliability.
Innovation Solution
Implementing joint adaptation between control channels and other configurations by allowing user equipment (UE) to switch between search space set groups (SSSGs) based on control signaling, applying parameter sets associated with different configurations to optimize power savings and reliability, such as through dynamic switching based on traffic or channel quality changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RRC reconfiguration process is used to adapt control channels and other configurations, then configuration changes can be made, but latency increases and signaling overhead increases due to slower process
Solution Approach 1:
The patent introduces dynamic switching between search space set groups (SSSGs) that are associated with different parameter sets (power saving, reliability, or balanced). The UE can switch between these pre-configured groups based on current channel conditions and traffic requirements, enabling adaptive configuration changes without requiring slow RRC reconfiguration procedures. This dynamic switching mechanism resolves the contradiction by providing both adaptability and low latency.
Solution Approach 2:
The network pre-configures multiple SSSG options with different parameter sets before the UE needs to adapt its configuration. These pre-configured groups include power saving parameters, reliability parameters, and balanced parameters. When adaptation is needed, the UE simply switches between these pre-prepared configurations rather than waiting for RRC reconfiguration, thus eliminating latency while maintaining adaptability.
2Adaptability or versatility
If RRC reconfiguration process is used to adapt control channels and other configurations, then configuration changes can be made, but signaling overhead increases due to slower process
Solution Approach 1:
The patent enables dynamic switching between pre-configured SSSG groups using lightweight MAC CE or DCI signaling instead of extensive RRC reconfiguration messages. This dynamic approach allows the UE to adapt its configuration (power saving, reliability, or balanced parameters) with minimal signaling overhead, resolving the contradiction between adaptability and information loss.
3Productivity
If dynamic switching between SSSGs is implemented, then latency is reduced and power savings improve, but system complexity increases
Solution Approach 1:
The patent segments the configuration space into distinct SSSG groups, each associated with specific parameter sets (power saving, reliability, or balanced). This segmentation allows the UE to switch between well-defined configurations rather than managing continuous parameter adjustments, reducing the complexity of dynamic adaptation while maintaining high productivity through efficient switching between segmented configuration options.
4Reliability
If multiple parameter sets are maintained for different configurations, then reliability and power savings can be optimized, but device complexity increases
Solution Approach 1:
The patent applies local quality by associating different parameter sets with specific SSSG groups based on local conditions (power saving needs, reliability requirements, or balanced operation). Each SSSG contains parameter sets optimized for its specific purpose, allowing the UE to apply appropriate parameters locally without managing all parameters globally, thus maintaining reliability and power savings while reducing overall device complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In a wireless communication system, a user equipment (UE) may receive an indication of multiple search space set groups (SSSGs), where a respective SSSG may be associated with a respective parameter set. Parameters in a parameter set may be power-saving parameters, reliability parameters, or a combination thereof. The UE may receive control signaling indicating a switch from a first SSSG to a second SSSG. The UE may switch from the first SSSG to the second SSSG and apply a first parameter set to the second SSSG, where the second SSSG is associated with (e.g., mapped to) to the first parameter set. In some examples, the SSSGs may be associated with respective scheduling request configuration groups (SRCGs), which the UE may use to transmit SRs to the network entity.