Power Control Method for 5G Carrier Bandwidth Part Switching
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Solution Overview
Problem
In 5G mobile communications systems, ensuring correct uplink signal quality during carrier bandwidth part switching is challenging due to differences in transmission parameters across various carrier bandwidth parts, which requires distinct power control settings for each part.
Innovation Solution
A power control method that configures different power control parameters for each carrier bandwidth part, allowing terminal devices to adjust transmit powers based on specific power control parameter indications sent by the network device, ensuring accurate uplink signal quality during switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different power control parameters are configured for different carrier bandwidth parts, then uplink signal quality is improved during bandwidth part switching, but device complexity increases
Solution Approach 1:
The patent segments the power control parameters by carrier bandwidth part, configuring separate power control parameters (P0, alpha, etc.) for each bandwidth part. This allows the terminal device to apply appropriate power control settings specific to each bandwidth part, thereby improving uplink signal quality during bandwidth part switching while managing complexity through structured segmentation.
Solution Approach 2:
The patent implements local quality by allowing different power control parameters to be applied to different carrier bandwidth parts based on their specific transmission requirements. Each bandwidth part can have optimized power control settings tailored to its characteristics, ensuring optimal uplink signal quality locally while maintaining overall system performance.
2Reliability
If power control parameters are adjusted for each carrier bandwidth part, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring power control parameters for each carrier bandwidth part through higher layer signaling before actual transmission. This allows the terminal device to have the necessary power control settings ready in advance, ensuring transmission reliability when switching between bandwidth parts without requiring real-time signaling adjustments.
Solution Approach 2:
The patent uses copying by reusing reference power control parameters across multiple bandwidth parts when applicable. Instead of configuring completely independent parameters for each bandwidth part, the system can copy and adapt reference parameters, thereby reducing signaling overhead while maintaining the ability to provide differentiated power control where needed.
Data Source
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AI summary
Embodiments of this application provide a power control method and apparatus. The method includes: receiving power control parameter indication information; and further, sending first uplink information on a first carrier bandwidth part based on a first transmit power, and sending second uplink information on a second carrier bandwidth part based on a second transmit power, where the first transmit power is determined based on a first power control parameter, the first power control parameter is determined based on the power control parameter indication information, the second transmit power is determined based on a second power control parameter, the second power control parameter is determined based on the power control parameter indication information, and the first carrier bandwidth part and the second carrier bandwidth part are located in a same carrier. It can be learned that different power control parameters are configured based on different carrier bandwidth parts, thereby ensuring uplink signal quality (or uplink coverage) during carrier bandwidth part switching.