BWP Configuration for Uplink Positioning Across Cell Reselection
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Solution Overview
Problem
In mobile communication systems, terminals in RRC idle or inactive states lose configured BWP when reselecting cells, preventing network devices from positioning based on uplink positioning reference signals.
Innovation Solution
Configure BWP information for terminals with area identifiers, allowing them to send uplink positioning reference signals in RRC idle or inactive states, ensuring stable positioning by associating BWP with cell, RAN area, or system information area identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal reselects to another cell during movement in RRC idle or inactive state, then the terminal can maintain mobility and access different cells, but the configured BWP is released causing positioning capability to be lost
Solution Approach 1:
The network device pre-configures multiple BWPs associated with different area identifiers before the terminal moves. When the terminal reselects cells, it can directly use the pre-configured BWP corresponding to the new cell's area identifier without releasing the configuration, thus maintaining positioning capability while enabling cell reselection
Solution Approach 2:
The BWP configuration is made universal by associating it with area identifiers rather than specific cells. A single BWP configuration can serve multiple cells within the same area, allowing the terminal to maintain the same BWP configuration across cell reselections while preserving positioning functionality
2Reliability
If the terminal maintains configured BWP across cell reselections, then positioning capability is preserved, but the complexity of BWP configuration management increases
Solution Approach 1:
The BWP configuration is segmented by associating different BWPs with different area identifiers. This segmentation allows the terminal to selectively activate appropriate BWP configurations based on the current cell's area identifier, simplifying management by organizing configurations into manageable groups rather than handling all configurations uniformly
Solution Approach 2:
Area identifiers serve as intermediaries between the terminal and BWP configurations. Instead of the terminal directly managing complex BWP configurations across multiple cells, the area identifiers act as a simplified interface that maps cells to appropriate BWPs, reducing configuration management complexity while maintaining positioning capability
Data Source
AI summary
An information configuration method is performed by a terminal, includes: receiving configuration information sent by a network device, wherein the configuration information includes at least one piece of bandwidth part (BWP) information; wherein each piece of BWP information in the at least one piece of BWP information is associated with at least one area identifier, and the at least one piece of BWP information is configured for the terminal to send an uplink positioning reference signal in at least one of a radio resource control (RRC) idle state or an RRC inactive state.