User Equipment Uplink Control Channel Transmission
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Solution Overview
Problem
In current carrier aggregation systems, user equipment cannot transmit uplink control channels simultaneously across multiple cells due to limitations in PUCCH capacity and power constraints, leading to restricted connectivity and reliability issues, especially for user equipment using certain cells as primary cells.
Innovation Solution
The implementation of a user equipment system with a transmission and reception unit, a simultaneous transmission availability determination unit, and a transmission control unit that assesses the ability to transmit uplink control channels across multiple cells and adjusts transmission priorities based on cell types and duplex modes to ensure reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUCCH transmission is supported in multiple cells simultaneously, then the connectivity and capacity utilization are improved, but the device complexity and power consumption increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters based on cell priority. The system changes transmission power levels, MIMO configuration, and resource allocation parameters differently for high-priority and low-priority cells, enabling simultaneous PUCCH transmission while managing device complexity through conditional parameter adaptation rather than fixed complex configurations
Solution Approach 2:
The patent segments the PUCCH transmission function by dividing cells into high-priority and low-priority groups. This segmentation allows the system to handle multiple cell transmissions by treating them as separate manageable units with different parameter sets, thereby improving capacity utilization while controlling device complexity through structured division of transmission tasks
2Reliability
If PUCCH transmission is supported in multiple cells simultaneously, then the connectivity is improved, but the power consumption increases
Solution Approach 1:
The patent implements parameter changes by adjusting transmission power dynamically based on cell priority and channel conditions. For high-priority cells, the system uses appropriate power levels to ensure reliable connectivity, while for low-priority cells, it reduces power consumption by using lower power modes or skipping transmission when resources are constrained, thus balancing connectivity reliability with power consumption
Solution Approach 2:
The patent applies partial action by selectively transmitting PUCCH in high-priority cells when power resources are limited, rather than attempting simultaneous transmission in all cells. This partial transmission approach ensures critical connectivity requirements are met while avoiding excessive power consumption that would occur with full simultaneous transmission across all cells
3Reliability
If transmission priorities are controlled according to cell types, then the reliability of high-priority cells is improved, but the productivity is reduced
Solution Approach 1:
The patent uses parameter changes to differentiate transmission behavior between high-priority and low-priority cells. High-priority cells receive optimized parameters including higher transmission power, preferred MIMO configurations, and prioritized resource allocation, while low-priority cells use reduced parameters. This conditional parameter adaptation improves reliability for critical cells while maintaining overall system productivity through efficient resource distribution
Solution Approach 2:
The patent applies local quality by assigning different transmission qualities and parameter sets to different cell types based on their priority. Instead of uniform transmission parameters across all cells, the system tailors transmission quality locally to each cell's requirements, ensuring high reliability for high-priority cells while accepting reduced transmission quality for low-priority cells, thereby balancing reliability and productivity
Data Source
AI summary
User equipment for transmitting an uplink control channel in multiple cells simultaneously in a radio communication system where transmission of the uplink control channel in a secondary cell is supported is disclosed. One aspect of the present invention relates to the user equipment, comprising: a transmission and reception unit configured to transmit and receive a radio channel to/from a base station via multiple cells configured for carrier aggregation; a simultaneous transmission availability determination unit configured to determine, in response to occurrence of an event where an uplink control channel is to be transmitted in the multiple cells simultaneously, whether the uplink control channel can be transmitted in the multiple cells simultaneously; and a transmission control unit configured to instruct the transmission and reception unit to transmit the uplink control channel in the multiple cells simultaneously if the uplink control channel can be transmitted in the multiple cells simultaneously and control transmission of the uplink control channel in accordance with transmission priorities corresponding to cell types if the uplink control channel cannot be transmitted in the multiple cells simultaneously.