Cell Re-selection Parameter Configuration via Default Values
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring default values for cell re-selection parameters, particularly when cell selection parameters are not provided in packet measurement order messages, leading to inefficient cell re-selection processes.
Innovation Solution
A method is proposed to configure default values for cell re-selection parameters by utilizing information from System Information Type 3 (SI3) and Packet System Information Type 3 (PSI3) messages, where missing parameters are set to values from the serving cell or broadcast control channel (BCCH) messages, ensuring effective cell re-selection even when parameters are not included in packet measurement order messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cell selection parameters are not provided in packet measurement order messages, then message size is reduced and transmission efficiency is improved, but cell re-selection process becomes incomplete and unreliable
Solution Approach 1:
The network pre-configures default cell selection parameters (such as GPRS_RESELECT_OFFSET, GPRS_PENALTY_TIME, GPRS_TEMPORARY_OFFSET) in system information messages before the mobile station needs to perform cell re-selection. These default values are stored in the mobile station and automatically used when specific parameters are not included in packet measurement order messages, ensuring the cell re-selection process can proceed reliably without requiring complete parameter inclusion in every message.
2Manufacturing precision
If all cell re-selection parameters are included in every packet measurement order message, then cell re-selection accuracy is improved, but message size increases and signaling overhead increases
Solution Approach 1:
Instead of uniformly including all parameters in every message, the system applies local quality by providing specific parameters only when they differ from defaults or when locally optimized values are available. The packet measurement order message includes only necessary parameters (such as neighbor cell identification and specific measurement requirements), while the mobile station uses pre-configured default parameters for other aspects, reducing message size while maintaining accuracy where it matters most.
3Device complexity
If default values are not configured for missing parameters, then system complexity is reduced, but cell re-selection process fails or becomes inefficient
Solution Approach 1:
The mobile station is equipped with the capability to automatically use default parameters when specific parameters are not provided in measurement order messages. This self-service mechanism allows the mobile station to autonomously complete the cell re-selection process using pre-configured defaults, eliminating the need for complex network-side parameter management while maintaining high re-selection efficiency. The mobile station independently determines which parameters to use from defaults and which to use from received messages.
Data Source
Figure 1A~1B
Figure 2
AI summary
Disclosed is a method of configuring values of cell re-selection parameters for cell re-selection from a serving cell to a neighbouring cell in a wireless communication system. The method includes receiving from a network a first message via a first control channel, wherein the first message includes values of a first group of cell selection parameters, assigning pre-stored values of the cell selection parameters for the serving cell to values of a second group of the cell selection parameters, if the first message does not include the values of the second group of the cell selection parameters, and calculating the values of the cell re-selection parameters using the values of the first and the second groups of the cell selection parameters.