Terminal Device System Information Update During BWP Switch
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Solution Overview
Problem
In wireless communication systems, terminal devices face challenges in receiving updated system information during a BWP switch, as they may not have access to system information on the new BWP, leading to delays and potential loss of connectivity.
Innovation Solution
The system information updating method involves the terminal device triggering a switch to a new BWP and receiving updated system information either before or after the switch, ensuring continuous access to system information by using dedicated signaling or switching to a BWP with system information if not available on the new BWP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device switches BWP when system information is being broadcast, then the terminal device cannot receive the updated system information, but if it stays on the current BWP, then it cannot utilize the BWP switching functionality
Solution Approach 1:
The network device sends indication information in advance to notify the terminal device of upcoming system information updates before the actual update occurs. This allows the terminal device to prepare by switching to the appropriate BWP in advance, ensuring it can receive the updated system information without interruption while maintaining BWP switching functionality.
Solution Approach 2:
The system implements a feedback mechanism where the network device monitors whether the terminal device has successfully received the updated system information. Based on this feedback, the network device can determine whether to proceed with BWP switching or maintain the current BWP configuration, thereby resolving the contradiction between reliable information reception and BWP switching adaptability.
2Loss of time
If the network device sends updated system information through dedicated signaling, then the terminal device can receive it quickly, but then signaling overhead increases
Solution Approach 1:
The system applies different transmission methods for different types of system information updates. For frequent or critical updates, dedicated signaling is used on specific BWPs to minimize delay. For less critical updates, broadcasting is used to reduce signaling overhead. This localized differentiation resolves the contradiction between update speed and overhead reduction.
Solution Approach 2:
The system dynamically changes transmission parameters such as modulation scheme, coding rate, and resource allocation based on the urgency and importance of the system information update. This allows the network to optimize the balance between update time and signaling overhead by adjusting parameters according to specific update requirements.
Data Source
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AI summary
Embodiments of the present application provide a system information updating method, a terminal device, and a network device. The terminal device can normally receive the updated system information during a BWP switch triggered by the terminal device, thereby ensuring that the terminal device can also update the system information during the BWP switch. The method includes: the terminal device triggers a switch from a first BWP to a second BWP; and the terminal device receives new system information on the first BWP, or receives new system information on the second BWP.