PDCCH Span Configuration Conflict Resolution for Low Complexity UEs
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Solution Overview
Problem
Current wireless communication technologies face challenges in managing span configuration conflicts for physical downlink control channels, leading to increased complexity and resource consumption, particularly in supporting ultra-reliable low latency communications and Internet of Things devices.
Innovation Solution
A method and apparatus for user equipment (UE) to identify span configuration conflicts and select a span configuration or per-span capability based on supported capabilities, reducing complexity by using the smallest span configuration or per-span capability, thereby conserving computing resources and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple span configurations are supported for different UE capabilities, then the system can support both high-tier and low-tier UEs, but complexity increases in managing span configuration conflicts
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting span configuration parameters (such as span length, gap between spans, and number of spans) based on UE capability indicators. The network can configure different span patterns for different UE types, changing the operational parameters to match device capabilities and resolve configuration conflicts
Solution Approach 2:
The patent implements dynamics by making span configurations adaptive and configurable rather than static. The system can dynamically select and switch between different span configurations based on UE capability reporting, allowing the network to optimize PDCCH monitoring behavior for each UE type while maintaining a unified configuration framework
2Productivity
If per-span capabilities are enforced for all UEs, then resource management improves, but power consumption increases for low-tier UEs
Solution Approach 1:
The patent applies local quality by allowing different portions of the span configuration to be applied selectively based on UE capability. Low-tier UEs can be configured with relaxed local parameters (such as reduced blind decode attempts per span or simplified span patterns) in specific regions of the configuration space, while maintaining overall resource management efficiency
Solution Approach 2:
The patent implements partial action by allowing low-tier UEs to perform a subset of the full per-span capability requirements. Instead of enforcing complete per-span capability compliance on all UEs, the system allows partial compliance where low-tier UEs can operate with reduced capabilities in certain spans while maintaining functionality
3Reliability
If span configuration conflicts are resolved by selecting largest span configuration, then coverage is improved, but complexity and processing requirements increase
Solution Approach 1:
The patent applies preliminary action by having UEs report their capability indicators in advance before span configuration conflicts arise. The network uses these pre-reported capabilities to pre-determine appropriate span configurations, avoiding the need for complex real-time conflict resolution and reducing processing requirements during operation
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a span configuration conflict between two or more span configurations associated with a span pattern for a carrier, wherein the two or more span configurations are associated with respective per-span capabilities for at least one of a quantity of non-overlapped control channel elements (CCEs) or a quantity of blind decodes to be performed for the carrier; select a span configuration or a per-span capability from the two or more span configurations to be used for the span pattern; and receive a communication on the carrier in accordance with the selected span configuration or the selected per-span capability. Numerous other aspects are provided.