PUCCH Resource Offloading via Secondary Cell Segmentation
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing carrier aggregation, particularly in handling the increased load of Physical Uplink Control Channels (PUCCH) on primary cells, which leads to high PUCCH resource loading and potential network congestion.
Innovation Solution
The implementation of carrier aggregation techniques, including dual connectivity and the use of secondary cells for PUCCH transmissions, allows for the offloading of PUCCH resources from primary cells, enabling more efficient use of radio resources and managing increased traffic loads by configuring multiple PUCCH groups and cells with PUCCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation with multiple cells is implemented, then network capacity and resource utilization are improved, but PUCCH resource loading on primary cells increases and system complexity increases
Solution Approach 1:
The patent segments the PUCCH transmission function by introducing secondary cells that can independently transmit PUCCH signals. Instead of concentrating all control information on the primary cell, the system divides the PUCCH loading across multiple cells (primary and secondary), thereby reducing the resource loading burden on any single cell while maintaining network capacity through carrier aggregation.
2Productivity
If more cells are configured for carrier aggregation, then radio resource efficiency is improved, but congestion management becomes more difficult
Solution Approach 1:
The patent applies segmentation by creating multiple PUCCH groups where each group is associated with specific cells. This structured division allows for more systematic congestion management, as each group can be independently controlled and managed, making the overall system easier to operate despite having multiple cells configured for carrier aggregation.
Data Source
AI summary
A wireless device receives a message. The message comprises first configuration parameters of a first SPS, and second configuration parameters of a second SPS. The wireless device receives a first DCI indicating activation of the first SPS. The first SPS allocates resources in TTIs comprising a first TTI. The wireless device receives a second DCI indicating activation of the second SPS and transmits second TB(s) based on the second DCI and the second configuration parameters. The wireless device receives a negative acknowledgement for a scheduled retransmission of the second TB(s) in the first TTI. The wireless device selects TB(s) for transmission in the first TTI, one of: a scheduled transmission of first TB(s) corresponding to the first SPS, or the scheduled retransmission of the second TB(s). The selected TB(s) are transmitted in the first TTI.