PDCCH Search Space Resource Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multi-antenna systems in wireless communication, particularly in 5G NR, face challenges in efficiently transmitting control channels, leading to potential collisions and reduced performance due to overlapping resource mappings and complex resource management.
Innovation Solution
A method is introduced that involves determining and managing distinct search space sets and time-frequency resource sets for PDCCH candidates, allowing for exclusion of overlapping resources and improved detection, thereby reducing collisions and enhancing phase tracking and decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control channels are transmitted through multiple transmission reception points in a multi-antenna system, then transmission robustness is enhanced, but resource collision and overlap complexity increase
Solution Approach 1:
The patent segments the control channel transmission by dividing search space sets into multiple groups, where each group is associated with a specific transmission reception point. This segmentation allows independent resource management for each TRP while maintaining overall system coordination, thus enhancing robustness without proportionally increasing complexity.
Solution Approach 2:
The patent implements preliminary action by pre-configuring search space sets and their associations with TRPs before actual control channel transmission. The network device预先 determines which search space set corresponds to which TRP, enabling proactive resource allocation that prevents collisions before they occur, rather than reacting to conflicts after they arise.
2Measurement precision
If search space sets are configured for multiple PDCCH candidates, then control channel detection capability is improved, but resource overlap and collision probability increase
Solution Approach 1:
The patent introduces an intermediary mechanism through the association relationship between search space sets and transmission reception points. This association acts as a mediator that coordinates resource allocation across multiple TRPs, ensuring that PDCCH candidates in different search space sets are mapped to distinct time-frequency resources, thereby preventing collisions while maintaining detection capability.
Solution Approach 2:
The patent applies local quality by assigning distinct resource characteristics to different search space sets based on their associated TRPs. Each search space set is configured with specific time-frequency resource properties tailored to its TRP, ensuring local resource optimization and preventing overlap between different TRP resources while allowing each TRP to operate independently.
3Productivity
If time-frequency resources are allocated for control signaling, then communication performance is enhanced, but resource utilization efficiency decreases due to exclusion requirements
Solution Approach 1:
The patent resolves resource conflicts by transitioning to another dimension - specifically, by associating search space sets with different spatial dimensions (different TRPs). Instead of allocating time-frequency resources in a way that causes overlap, the patent uses the spatial dimension to separate resources, allowing multiple PDCCH candidates to coexist without collision while maintaining efficient resource utilization across the multi-antenna system.
Data Source
AI summary
The node receives a first information block determining a first search space set and a second search space set; and receives a target control signaling and a first signal, the target control signaling determining a first time-frequency resource set, the first signal belonging to the first time-frequency resource set, the PDCCH candidates in the first search space set and the second search space set are correspondingly associated, a first PDCCH is a PDCCH candidate in the first search space set.while a second PDCCH is a PDCCH candidate associated with the first PDCCH in the second search space set, a target time-frequency resource subset comprises one RE, other than the RE(s) occupied by the first signal; whether the first PDCCH is detected is used to determine whether the target time-frequency resource subset comprises one RE occupied by the second PDCCH. This application avoids resource collisions.