PUCCH Secondary Cell Resource Distribution
Find Innovative SolutionsGenerate Solutions
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 potential resource bottlenecks, especially as the number of aggregated carriers and PUCCH payloads increase.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to distribute PUCCH resources across secondary cells, reducing the load on primary cells and enabling simultaneous PUCCH/PUSCH transmission on both primary and secondary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCH groups are implemented to distribute PUCCH resources, then the PUCCH load on primary cells is reduced, but the device complexity increases due to additional configuration and management requirements
Solution Approach 1:
The patent segments the PUCCH transmission function by introducing multiple PUCCH groups (first PUCCH group and second PUCCH group), where each group is associated with different cell groups (master cell group and secondary cell group). This segmentation distributes the PUCCH load across multiple cells, preventing any single primary cell from becoming overloaded, thereby resolving the contradiction between increased capacity and management complexity.
Solution Approach 2:
The patent implements multi-functionality by enabling PUCCH transmission on both primary cells and secondary cells through multiple PUCCH groups. The same PUCCH mechanism serves dual purposes: transmitting control information for master cell group cells and for secondary cell group cells, thereby increasing overall system capacity without requiring entirely separate transmission systems.
2Ease of operation
If PUCCH resources are concentrated on primary cells, then the configuration is simple, but the network efficiency decreases under high traffic loads
Solution Approach 1:
The patent segments the centralized PUCCH configuration into distributed PUCCH groups associated with different cell groups. This allows the system to maintain configuration simplicity at the logical level while achieving distributed resource allocation that improves network efficiency under high traffic loads.
Solution Approach 2:
The patent introduces PUCCH groups as intermediary structures that mediate between the simple centralized configuration model and the complex distributed transmission reality. These groups act as intermediaries that organize and coordinate PUCCH resources across multiple cells, enabling efficient resource utilization without requiring overly complex direct control mechanisms.
3Adaptability or versatility
If simultaneous PUCCH/PUSCH transmission is enabled on secondary cells, then the capacity and flexibility are enhanced, but the resource management complexity increases
Solution Approach 1:
The patent implements dynamic resource management by enabling simultaneous PUCCH and PUSCH transmissions on secondary cells through multiple PUCCH groups. The system can dynamically allocate resources based on instantaneous traffic conditions, allowing flexible transmission modes (simultaneous or multiplexed) that adapt to varying network demands while managing complexity through structured group associations.
Data Source
AI summary
A wireless device receives, during a first time interval, a command indicating activation of a physical uplink control channel (PUCCH) secondary cell of a timing advance group (TAG). A timing advance for the TAG is received. Transmission of valid channel state information is started via the PUCCH secondary cell during a second time interval occurring a first quantity of time intervals after the first time interval. The first quantity is based on a delay from receipt of the command until the wireless device applies the timing advance to uplink transmissions via the TAG.