NR Cell Selection Using Broadcast Inter-RAT Configuration
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Solution Overview
Problem
The communication performance of terminals is poor when cell selection is based on methods from the LTE system, which does not account for the different functionalities of the NR system, particularly in scenarios where cross-carrier and inter-RAT configurations are involved.
Innovation Solution
A method for terminals to perform cell selection and reselection based on broadcast messages indicating inter-RAT configuration support, mode, and resource location, allowing for prioritization of cells that better meet the terminal's needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell selection is performed according to LTE system methods, then the terminal can perform basic cell selection, but the communication performance of the terminal in the selected cell is poor due to NR system functional differences
Solution Approach 1:
The patent changes the cell selection parameters from LTE-based criteria to NR-based criteria, including inter-RAT configuration support, cross-carrier configuration support, and resource allocation mode information. These parameter changes enable the terminal to select cells optimized for NR systems, thereby improving communication performance while adapting to different system requirements.
2Productivity
If the terminal selects a cell based on cross-carrier configuration availability, then V2X services can be provided, but the terminal may select cells that do not fully support required inter-RAT configurations
Solution Approach 1:
The patent implements a feedback mechanism where the network device broadcasts inter-RAT configuration information, supported cross-carrier configuration modes, and resource location details. The terminal uses this feedback information to make informed cell selection decisions, ensuring that selected cells provide the necessary V2X services while maintaining configuration compatibility with the terminal's requirements.
Solution Approach 2:
The network device performs preliminary action by broadcasting configuration information about inter-RAT support and resource allocation modes before the terminal makes cell selection decisions. This allows the terminal to prepare its selection criteria in advance based on the broadcasted information, ensuring compatible and optimal cell selection.
3Adaptability or versatility
If the network device provides comprehensive inter-RAT configuration support, then more cell options are available, but the complexity of determining the appropriate configuration mode increases
Solution Approach 1:
The broadcast message acts as an intermediary that carries standardized information about inter-RAT configuration support and resource location. This intermediary structure simplifies the terminal's selection process by providing clear, structured data about available configurations, reducing the complexity of determining appropriate modes while maintaining flexibility.
Data Source
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AI summary
The embodiments of the present disclosure provide a cell selection method, a broadcast message sending method, terminal and a network device, and the method includes: receiving, by a terminal, a broadcast message sent by a network device, where the broadcast message is used to indicate at least one of: whether the network device supports inter-RAT configuration, a mode of inter-RAT configuration supported by the network device, and a resource location of the inter-RAT configuration supported by the network device; performing, by the terminal, cell selection or cell reselection according to the broadcast message.