Initial BWP Selection Using Reference Signal Beams
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Solution Overview
Problem
In satellite communication systems, selecting an initial Bandwidth Part (BWP) for a terminal device in a non-connected state is challenging due to the need for configuring multiple BWPs for different satellite beams to avoid co-channel interference, necessitating a method to ensure better channel quality and communication performance.
Innovation Solution
A method for selecting an initial BWP based on measurement results of reference signal beams, where each BWP is associated with at least one reference signal beam, allowing the terminal device to determine a target BWP, and network devices can provide configuration information for this selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple different initial BWPs are configured for different satellite beams, then co-channel interference between different satellite beams is reduced, but the complexity of initial BWP selection for terminal devices increases
Solution Approach 1:
The terminal device measures reference signal beams and uses this measurement feedback to determine the target initial BWP. The network device provides configuration information that enables the terminal to select the appropriate BWP based on measured channel quality, creating a feedback-driven selection mechanism that reduces interference while maintaining manageable complexity
Solution Approach 2:
The terminal device autonomously selects its target initial BWP by measuring reference signal beams and using the measurement results to determine the best BWP for its current satellite beam. This self-service approach allows the terminal to handle the complexity of multiple BWPs independently without requiring network intervention for each selection
2Reliability
If multiple different initial BWPs are configured for different satellite beams, then communication service continuity is improved during satellite beam transitions, but the difficulty of selecting the appropriate initial BWP increases
Solution Approach 1:
The network device pre-configures multiple different initial BWPs for different satellite beams before the terminal needs to switch beams. This preliminary configuration allows the terminal to quickly select an appropriate BWP when transitioning between beams, ensuring service continuity without requiring complex real-time decision-making
Solution Approach 2:
The terminal device dynamically selects the target initial BWP based on real-time measurement results of reference signal beams. This dynamic selection capability allows the terminal to adapt to changing satellite beam conditions, maintaining reliable communication service continuity as it moves between beams
3Ease of operation
If the terminal device selects initial BWP without measurement results, then the selection process is simplified, but the channel quality of the selected BWP deteriorates
Solution Approach 1:
The terminal device performs measurements on reference signal beams as part of the BWP selection process. While this adds some complexity, it ensures that the selected BWP has good channel quality by basing the selection on actual measurement results rather than random or default selection
Data Source
AI summary
Provided are a method for selecting an initial bandwidth part (BWP), a terminal device and a network device. The method includes: determining, by a terminal device, a target initial BWP among a plurality of initial BWPs for a first cell according to measurement results of a plurality of reference signal beams in the first cell. Each initial BWP in the plurality of initial BWPs is associated with at least one reference signal beam, and the first cell is a cell which the terminal device currently camps on.