Uplink Control Information Transmission in Carrier Aggregation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting channel information and ACK/NACK feedback across multiple serving cells in 5G networks, particularly in scenarios with carrier aggregation, where resource allocation and power management are complex due to the need for simultaneous PUCCH and PUSCH transmissions, leading to potential power imbalances and reduced reliability.
Innovation Solution
The method involves a UE that generates and transmits uplink control information, identifying whether PUSCH is configured on a primary or secondary cell, and adjusts transmission power to prioritize PUSCH over PUCCH when necessary, ensuring reliable data transmission while optimizing resource use in unlicensed bands by employing PUCCH format 4/5 for efficient channel occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH and PUSCH are simultaneously transmitted on multiple serving cells, then the channel information and ACK/NACK feedback can be transmitted more reliably, but the power consumption increases and power management becomes complex
Solution Approach 1:
The patent segments the uplink control information transmission by separating PUCCH (carrying channel information) and PUSCH (carrying ACK/NACK feedback) into different serving cells. This segmentation allows independent power control and resource management for each channel type, reducing overall power consumption while maintaining transmission reliability through diversified paths
Solution Approach 2:
The patent implements dynamic power allocation and resource assignment for simultaneous PUCCH and PUSCH transmissions across multiple serving cells. The base station dynamically adjusts transmission parameters based on channel conditions and traffic requirements, optimizing power usage while ensuring reliable delivery of control information
2Productivity
If PUCCH format 4/5 is used for channel occupancy in unlicensed bands, then resource utilization efficiency improves, but the complexity of resource allocation increases
Solution Approach 1:
The patent applies preliminary resource assignment where the base station pre-configures PUCCH format 4/5 resources for unlicensed band operations before actual transmission. This preliminary setup includes pre-defining time-frequency resources, modulation schemes, and coding parameters, thereby simplifying real-time resource allocation while maintaining high utilization efficiency
Solution Approach 2:
The patent utilizes parameter changes by dynamically selecting different PUCCH formats (4 or 5) based on the amount of uplink control information and channel conditions. This parameter adaptation allows efficient resource usage across varying traffic scenarios while managing complexity through standardized format selection criteria
Data Source
AI summary
A communication method and a system for supporting a high data transmission rate are provided. The method and system fuses 5G communication systems with IoT technology to transmit data at a high rate after 4G systems. The communication method and system are applied to intelligent services, based on 5G communication technology and IoT related technology, for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail business, security, safety-related services, etc. The method for transmitting control information by a user equipment (UE) includes generating uplink control information (UCI), identifying whether a physical uplink shared channel (PUSCH) is not configured to transmit on a primary cell (PCell), identifying whether the PUSCH is configured to transmit on at least one secondary cell (SCell) for licensed band, and transmitting, to a base station, the UCI according to the identification.