Terminal Cell Search Optimization via Macro Cell Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The inefficiency of cell searching in terminals due to high computational complexity and power consumption, especially when home cells and macro cells use different frequencies, and the need for frequent updates in cell search information.
Innovation Solution
A method for a terminal to receive cell search information from a macro cell base station, update its stored information, and selectively search for accessible cells based on this information, including determining a cell search cycle based on residence time and visit frequency, and activating or deactivating cell IDs accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous cell searching is performed by searching all cells in the neighboring cell list periodically, then cell access reliability is improved, but computational complexity and power consumption increase significantly
Solution Approach 1:
The patent extracts only the necessary cell search information from the complete neighboring cell list by receiving updated cell search information from the macro cell base station. Instead of searching all cells periodically, the terminal receives targeted updates containing only changed cell information (such as cell IDs, frequencies, or other parameters that have changed), thereby reducing the search scope and power consumption while maintaining reliable cell access.
Solution Approach 2:
The patent implements preliminary action by having the macro cell base station proactively send updated cell search information to the terminal before the terminal needs to perform comprehensive cell searching. The base station prepares and transmits the updated neighboring cell list in advance (through paging messages or system information), allowing the terminal to perform minimal updates rather than complete searches, thus reducing power consumption while ensuring up-to-date cell information is available for reliable access.
2Measurement precision
If comprehensive cell searching is performed periodically, then cell search accuracy is improved, but processing load increases
Solution Approach 1:
The patent extracts only the essential cell search parameters that have changed from the complete cell information set. The macro cell base station identifies and sends only the updated cell search information (such as modified cell IDs, frequency changes, or status updates) rather than transmitting the entire neighboring cell list, allowing the terminal to update its cell search data with minimal processing while maintaining search accuracy.
Solution Approach 2:
The patent applies partial action by performing only the necessary cell search updates rather than complete comprehensive searches. The terminal receives partial updates containing only changed cell information and performs minimal processing to integrate these updates into its existing cell search list, achieving accurate cell search results with significantly reduced processing load compared to periodic comprehensive searches.
3Loss of information
If cell search information is updated frequently to reflect network changes, then cell information currency is improved, but power consumption increases
Solution Approach 1:
The patent implements feedback by establishing a communication mechanism where the macro cell base station monitors changes in cell search information and actively sends update notifications to the terminal when changes occur. This feedback loop ensures that the terminal receives timely updates about cell information changes (such as new cells, removed cells, or parameter changes) without needing to continuously poll or perform frequent comprehensive searches, thereby maintaining current cell information with reduced power consumption.
Solution Approach 2:
The patent applies preliminary action by having the macro cell base station prepare and transmit updated cell search information to the terminal in advance of when the terminal would need to perform comprehensive searches. The base station proactively pushes updates containing changed cell information through paging messages or system information, ensuring the terminal has current cell data before it needs to access cells, thereby maintaining information currency while minimizing power consumption from frequent active searching.
Data Source
AI summary
A cell search method for a terminal capable of cell search control includes: receiving a message including first cell search information from a macro cell base station that manages a macro cell; updating second cell search information stored in the terminal based on the first cell search information; and searching for an accessible cell based on the updated second cell search information.