Secondary Cell PUCCH Resource Scheduling for Primary Load Reduction
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing multiple physical uplink control channel (PUCCH) groups, leading to high PUCCH load on primary cells and limited resource distribution across secondary cells, which affects overall network performance.
Innovation Solution
The implementation of multiple PUCCH groups, where secondary cells can offload PUCCH resources from primary cells, allowing flexible distribution of control signaling and CSI reports across multiple PUCCH SCells, thereby reducing the load on primary cells and enhancing network capacity and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCH groups are implemented with secondary cells offloading PUCCH resources, then network capacity and robustness are improved, but device complexity and resource management overhead increase
Solution Approach 1:
The patent divides the PUCCH resources into multiple groups (first PUCCH group and second PUCCH group) that can be independently configured and managed. Each group can be associated with different serving cells, allowing the system to segment the control channel resources across multiple cells rather than concentrating them all on the primary cell. This segmentation enables parallel management of different PUCCH groups, improving network capacity while distributing the management complexity across multiple independent resource pools.
2Device complexity
If PUCCH resources are concentrated on primary cells, then resource management is simplified, but network robustness and capacity are limited
Solution Approach 1:
The patent enables different serving cells to have different PUCCH resource configurations and characteristics. The primary cell can maintain simplified resource management while secondary cells are configured with specific PUCCH groups that have locally optimized resource allocations. This allows each cell to have quality-tailored PUCCH resources suited to its specific role and channel conditions, improving overall network robustness without requiring complete centralization of resource management complexity.
3Loss of energy
If secondary cells are configured with PUCCH resources, then load on primary cells is reduced, but scheduling complexity and resource coordination increase
Solution Approach 1:
The patent introduces a structured intermediary framework where PUCCH groups act as intermediate layers between the MAC entity and the physical PUCCH resources. The MAC entity configures multiple PUCCH groups with specific associations to serving cells, creating an organized intermediary structure that mediates between the need for load distribution and scheduling complexity. This intermediary framework provides clear rules for resource allocation and management, reducing the effective complexity of coordinating multiple PUCCH resources across secondary cells.
Data Source
AI summary
Systems, apparatuses, and methods are described for wireless communications. A wireless device may receive configuration parameters of a plurality of cells. A secondary cell may have configured scheduling request (SR) resources and a primary cell may not have configured SR resources. The wireless device may determine that configured SR resources for the secondary cell are invalid, based on one or more conditions in a time interval.