Control Channel Search Space Sharing for Selective Repetition
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Solution Overview
Problem
Existing wireless communications systems face inefficiencies in control channel repetition due to deficiencies in search space sharing techniques, particularly in scenarios involving linked or unlinked control channel decoding candidates across search spaces.
Innovation Solution
Implementing search space sharing conditions and configurations that allow for control channel repetition across linked or unlinked sets of control channel decoding candidates, enabling flexible and efficient monitoring of control channels in wireless communications systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control channel repetition is implemented across multiple search space sets, then transmission diversity and reliability are improved, but device complexity and monitoring overhead increase
Solution Approach 1:
The patent segments control channel candidates into different sets (first set for first cell, second set for second cell) with different repetition configurations. This allows selective application of search space sharing to specific candidate sets, reducing overall monitoring complexity while maintaining reliability benefits for configured candidates.
Solution Approach 2:
The patent introduces dynamic search space sharing conditions that can be selectively applied based on configuration. The UE dynamically determines whether to apply search space sharing between search space sets based on whether control channel candidates are configured for repetition, adapting the monitoring behavior to specific scenario requirements.
2Productivity
If search space sharing is applied to all control channel candidates, then resource efficiency improves, but reliability deteriorates due to inconsistent handling of linked and unlinked candidates
Solution Approach 1:
The patent applies search space sharing selectively to specific local contexts - only to control channel candidate sets that are configured for repetition. Different quality rules apply to different candidate sets: configured candidates benefit from search space sharing for resource efficiency, while unconfigured candidates maintain traditional monitoring for reliability.
Solution Approach 2:
The patent changes the parameter of search space sharing applicability based on the repetition configuration parameter. When candidates are configured for repetition, search space sharing is enabled; when not configured, it is disabled. This parameter-based control resolves the contradiction by adapting resource allocation to reliability requirements.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from an access network entity, control signaling indicating first and second search space sets. In some cases, a first set of control channel decoding candidates associated with scheduling a first component carrier may be linked for control channel repetition across the first search space set and the second search space set, and a second set of control channel decoding candidates associated with scheduling a second component carrier may not be linked for control channel repetition. The UE may identify a search space sharing condition for the first and second sets of control channel decoding candidates and monitor the first set of control channel decoding candidates, the second set of control channel decoding candidates, or both, in accordance with the search space sharing condition.