Primary Secondary PUCCH TPC Indexing Wireless Network
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Solution Overview
Problem
Existing communication systems face challenges in efficiently managing multiple physical uplink control channel (PUCCH) groups, leading to high PUCCH load on the primary cell and potential performance degradation.
Innovation Solution
The implementation of multiple PUCCH groups, where cells can be grouped into primary and secondary PUCCH groups, allowing PUCCH transmissions on both the primary cell and secondary cells to offload resources and improve system capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCH groups are implemented to distribute control channel resources, then system capacity and communication performance are improved, but device complexity and configuration management difficulty increase
Solution Approach 1:
The patent divides the control channel resources into multiple PUCCH groups (first PUCCH group and second PUCCH group), each with independent TPC indexing. This segmentation allows distributed resource management across multiple cells while maintaining independent control, resolving the contradiction by enabling system capacity expansion without proportionally increasing configuration complexity at each individual cell level.
Solution Approach 2:
The patent implements a unified TPC command structure that can simultaneously control multiple PUCCH groups through a single DCI message. The first and second TPC commands are transmitted together in one DCI, providing universal control functionality that manages multiple PUCCH resources without requiring separate control mechanisms for each group, thus improving productivity while controlling device complexity.
2Loss of energy
If multiple PUCCH groups are implemented to offload primary cell resources, then PUCCH load on primary cell is reduced, but transmission overhead and signaling complexity increase
Solution Approach 1:
The patent merges the transmission of multiple TPC commands into a single DCI message. The first TPC command for the first PUCCH group and the second TPC command for the second PUCCH group are transmitted together in one Downlink Control Information message, reducing the number of separate transmissions required and minimizing signaling overhead while effectively distributing the PUCCH load.
Solution Approach 2:
The patent introduces a unified TPC indexing mechanism that acts as an intermediary between the DCI and multiple PUCCH groups. The TPC commands use indexed references (first TPC index and second TPC index) that map to different PUCCH groups, allowing efficient resource allocation and reducing the information overhead required to manage multiple PUCCH resources.
Data Source
AI summary
A wire device receives: configuration parameters of: a primary cell with a primary physical uplink control channel (PUCCH); and a secondary cell with a secondary PUCCH; a transmit power control (TPC) radio network temporary identifier (RNTI); a primary TPC index of the primary PUCCH; and a secondary TPC index of the secondary PUCCH. The wireless device receives a downlink control information (DCI) associated with the TPC RNTI. The secondary TPC index identifies a TPC command in an array of TPC commands in the DCI. The wireless device adjusts a transmission power of the secondary PUCCH based on the TPC command.