Broadcast Cell Selection Using Inter-RAT Configuration Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of cell selection for terminals, the communication performance is compromised due to differences in network device functions between LTE and NR systems, leading to suboptimal cell selection when using LTE system methods.
Innovation Solution
A method where terminals receive a broadcast message from network devices indicating inter-RAT configuration support, mode, and resource location, allowing for cell selection based on priority orders to improve communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal selects a cell according to the LTE system cell selection method, then the cell selection process is simple and compatible with existing LTE infrastructure, but the communication performance of the terminal in the selected cell is poor due to differences in network device functions between LTE and NR systems
Solution Approach 1:
The patent implements dynamic cell selection by having the terminal determine whether the network device supports inter-RAT configuration through broadcast message reception, and dynamically adjust cell selection strategy based on this determination. When inter-RAT configuration is supported, the terminal selects cells that can provide NR system services; when not supported, the terminal falls back to LTE system cell selection methods, thereby adapting to different network capabilities.
Solution Approach 2:
The patent changes the cell selection parameters based on the network device's inter-RAT configuration support status. The terminal uses different selection criteria: in NR-capable cells, it considers inter-RAT configuration support and NR service availability; in LTE-only cells, it uses traditional LTE cell selection parameters. This parameter adaptation resolves the contradiction between maintaining simple selection processes and achieving NR-optimized performance.
2Reliability
If the network device provides inter-RAT configuration support information through broadcast messages, then the terminal can make informed cell selection decisions to improve communication performance, but the network device complexity increases due to the need to send and manage additional configuration information
Solution Approach 1:
The network device automatically broadcasts its inter-RAT configuration support capability and resource allocation mode information through standard broadcast channels. The terminal autonomously receives this broadcast information and performs cell selection based on the provided parameters without requiring additional signaling exchanges or manual configuration. This self-service mechanism improves communication performance while avoiding excessive network device complexity.
Solution Approach 2:
The patent uses existing broadcast message structures to convey multiple pieces of information simultaneously: inter-RAT configuration support status, resource allocation modes, and cell selection parameters. This multi-functional use of broadcast messages allows the network device to provide comprehensive cell selection guidance without requiring separate dedicated signaling channels, thereby improving terminal performance while minimizing additional network device complexity.
Data Source
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 according to the broadcast message, and the cell selection is a cell selection or a cell reselection.