Uplink Secondary Component Carrier Configuration in 5G Wireless Systems
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Solution Overview
Problem
In a carrier aggregation-based wireless communication system, the base station performs uplink power control based on a P_max value, leading to UL CA performance degradation in weak electric field areas, which decreases peak and average throughput, causes ACK/NACK transmission errors, and increases RLF occurrence, especially when the configured UL SCC is deactivated.
Innovation Solution
A method for a base station to transmit information controlling the configuration of an uplink secondary component carrier (SCC) based on the uplink electric field environment of a primary cell, involving measurement configuration and report messages to select the best UL SCC, thereby maximizing throughput and minimizing configuration latency and network signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the base station performs uplink power control based on P_max value when UL SCC is deactivated, then the uplink power control is simplified, but the UL CA throughput is degraded in weak electric field areas
Solution Approach 1:
The patent implements dynamic switching between two uplink power control methods based on the electric field strength. When the electric field is strong, the simplified P_max-based method is used. When the electric field is weak, the patent switches to a more complex method that considers both P_max and Pc_max values to maintain UL CA throughput performance.
Solution Approach 2:
The patent changes the power control parameters dynamically based on electric field conditions. By adjusting which parameters (P_max alone or both P_max and Pc_max) are used for power control, the system adapts to different channel conditions to optimize throughput while managing complexity.
2Productivity
If the base station configures UL SCC in weak electric field areas, then the UL CA throughput is improved, but the P_max limitation causes performance degradation
Solution Approach 1:
The patent dynamically adjusts the power control strategy based on electric field strength. In weak electric field areas, it activates a more aggressive power control mode that allows UL SCC configuration by utilizing both P_max and Pc_max values, thereby improving throughput while maintaining reliability through adaptive parameter selection.
Solution Approach 2:
The patent performs preliminary assessment of electric field strength before configuring UL SCC. By evaluating channel conditions in advance, the system determines whether to proceed with UL SCC configuration and selects appropriate power control parameters, preventing performance degradation before it occurs.
3Measurement precision
If the base station uses measurement report messages to select UL SCC, then the configuration accuracy is improved, but the signaling overhead is increased
Solution Approach 1:
The patent implements a selective measurement reporting mechanism. Instead of requiring continuous measurement reports for all cells, the system requests measurements only when necessary for UL SCC selection or when channel conditions change significantly. This reduces signaling overhead while maintaining sufficient measurement precision for accurate UL SCC configuration.
Data Source
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AI summary
The present disclosure relates to a communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology. The present disclosure is applicable to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, and security and safety-related services) based on the 5G communication technology and the IoT-related technology. A proposed method for a base station to transmit information controlling configuration of an uplink (UL) secondary component carrier (SCC) corresponding to a secondary cell in a wireless communication system supporting carrier aggregation (CA) includes identifying first information associated with an uplink electric field of a primary cell, transmitting measurement configuration information associated with the secondary cell to a terminal, receiving a measurement report message associated with the secondary cell from the terminal, identifying second information associated with a downlink electric field of the secondary cell based on the measurement report message, and transmitting the information controlling configuration of the UL SCC of the secondary cell to the terminal based on at least one of the first information or the second information.